Sharp LED/LCD Philips Plasma/LCD TV Case History Volume 1

DAMON MORROWSharp LCD/LED TV

Philips Plasma/LCD TVCase History Vol.1

Memory Problems, Power Problems & Display Problems

http://www.PlasmaTVRepairGuide.com

Sharp LCD/LED TV Philips Plasma/LCD TVCase History Vol.1

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http://www.PlasmaTVRepairGuide.com/

http://www.plasmatvrepairguide.com/ledtvrepairv1/sharp-philips-v1/

http://www.plasmatvrepairguide.com/ledtvrepairv1/sharp-philips-v1/

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The reader is expressly warned to consider and adopt all safety precaution that might be indicated by the activities herein and to avoid all potential hazards. This E-book is for informational purposes only and the author do not accept any responsibilities or liabilities resulting from the use of this information. While every attempt has been made to verify the information provided here, the author cannot assume any responsibility for any loss, injury, errors, inaccuracies, omissions or inconvenience sustained by anyone resulting from this information. Most of the tips and secrets given should only be carried out by suitably qualified electronics engineers/technicians. Please be careful as all electrical equipment is potentially dangerous when dismantled. Any perceived slights of policy, specific people or organizationsare unintentional.

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Limit of Liability / Disclaimer of Warranty:The authors and publisher of this book and the accompanying materials haveused their best efforts in preparing this program. The authors and publisher make no representation or warranties with respect to the accuracy, applicability, fitness, or completeness of the contents of this program. They disclaim any warranties (expressed or implied), merchantability, or fitness for any particular purpose. The reader is expressly warned to consider and adapt all safety precautions that might be indicated by the activities here in and to avoid all potential hazards. By following the instructions contained herein, the reader willingly assumes all risks in connection with such instructions. The authors and publisher shall in no event be held liable for any loss or other damages, including but not limited to special, incidental, consequential, or other damages. As always, the advice of a competent legal,tax, accounting or other professional should be sought.

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Dedication

This book is dedicated to: Jestine Yong, Sunny, David Maltz, Teonna Flags, and Michael Danish. I would like to give special thanks to Jestine for being a great teacher to me and a great friend and always inspiring me to study harder to become an Engineer of electronics. Also special thanks to David for being my big brother and keeping my spirits up and always encouraging me to stay fit and healthy and to go further and to never give up. Thank you

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Content

1 Documented Service Records – All Level Technicians 5

2 Sharp LCD/LED and Philips Plasma/LCD TV Service Case History Layout Example

7

3 Quick Tips On Sharp & Philips Components 8

4 Tv Model List……. 12

5 The Actual Sharp LCD/LED and Philips Plasma/LCD TV Case History Volume 1 Begins Now

14

6 TV Manufacturer Reset Codes 42

7 Conclusion 63

8 Recommended Resources 64

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DAMON MORROW

Sharp LCD/LED TV

Philips Plasma/LCD TV

Case History Vol.1

Sharp & Philips TV: Memory Problems, Power Problems, Display Problems

Documented Service Records - All Level Technicians

For Intermediates, Professional Technicians And Advanced Students

Documented Service Records – All Level Technicians.

Power Faults - Display Faults - Memory Errors

The following information in this Sharp & Philips case history e-book waswritten and compiled according to Damon Morrow's in-house servicerecords (or case history) of Sharp & Philips TV failures. This e-bookdocuments a fair range of Sharp & Philips TV faults including variousmemory errors, display symptoms, and power failures. This case history e-book is very easy to use, and it simply lists a fair range of popular problemsand secretive fixes for Sharp & Philips TV's. The information contained inthese pages are complete with the model number of the Sharp & PhilipsTV, the board-number of the faulty circuit, and the part-locationnumber of the defective component(s).

This e-book is a simple and affective reference tool, revealing components which have failed causing performance issues with Sharp & Philips TV's. This e-book documents known symptoms on Sharp & Philips TV's such as Stand-by power only, dead-no power, no start-up cycle, error image on-screen, lines on screen, no audio, and much more.

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The components and IC's which have failed are listed in this e-book, and they are mainly standard components and IC chips. Standard component failure include diodes, resistors, MOSFET's, IGBT’s, NPN's, and capacitors.

IC chip failure include memory IC's, control IC’s, buffer IC’s, IPM Module, FET chips, buck regulators, LDO’s, level shifters, etc. The test equipment used while compiling this Sharp & Philips case history information was a standard DVM meter (Fluke), Capacitor meter (uF/ESR) and a 60Mhz digital Oscilloscope (the very basics all technicians use). The scope was primarily used to troubleshoot IC chips and their I/O signaling, especially onPhilips plasma sustain boards. The scope was also used to test feedback-loops, start-pulses, and duty-cycles on Sharp LCD/LED boards, as well as serial-clocks, gate-circuits, and bucking control. However, in this e-book all of the troubleshooting has been done for you, with the causes and bad parts listed.

This Sharp & Philips e-book is for technicians of all levels, there are no complex diagrams or detailed graphics involved. This e-book is not a case history of troubleshooting and circuit evaluation (as with my Plasma DisplayFaults & LCD Secrets books). This e-book is a simple case history of Sharp & Philips TV parts failure. Again, all of the troubleshooting work has been done for you and compiled in a simple and easy to follow format. This e-book is written text information correlating to shop records. There are no pictorial graphics or illustrative diagrams used in this e-book as it is not required i.e. 'case-history'.

Note: Below is an example of how the Service-Case-History Records of each Sharp & Philips TV model are laid out in this e-book, and also shows the meaning of each category.

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Sharp & Philips TV

Service Case History Layout Example

1) TV Model Number: Model number of TV issued by TV manufacturer(Example LC-52D85U).

2) TV Failure Symptom: The kind of problem the TV is having(Example Full start-up no picture, backlights only, protect mode). 3) Faulty Board: Which board inside the TV has the failure(Example T-Con Board).

4) Faulty Board Number: Manufactures Part Number of faulty board(Example CPWBX4023TPXZ).

5) Board Location Number Of Faulty Part(s): The location number of the faulty part(s)on the SMPS-board(Example Q6286).

6) Part(s) Failure Type: The way in which the part(s) have failed(Example 8-pin FET IC Q6286 no source voltage output (dead)).

7) Shop Notes: (If available) shop notes relating to the repair(Example 8-pin FET IC Q6280 replaced as a service precaution).(n.a. Means shop notes are not available.

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Quick Tips On Sharp & Philips ComponentsQuick Emphasis on Component Faults & Error's

The five figures below point out the main components that are known to fail on main boards, T-Con boards, SMPS boards, and X/Y sustain boards from Sharp & Philips TV’s. FIG 1-2-3 illustrates the bucking IC’s and LDO’s that causes multiple shut down issues on T-Con’s (logic board) and main boards. FIG 4 reveals SMPS parts failures as well.

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FIG1-2-3 Buck converters, Step Down Switchers, and LDO’s that fail on T-Con board’s will cause the TV to fully power-up with a brief raster then only the backlights are on, and then the TV shuts down into protect mode (indicating a fault error) and faulty SMD FET’s cause the same symptom. The same three components in FIG 1-2-3 that fail on T-Cons also fail on main boards (including faulty SMD FET’s) and will cause the TV to fully power-up with welcome-screen, then approximately after 20 seconds the TV shuts down into brief stand-by mode, the protect mode (indicating a fault error). The fault symptom of the TV is governed by the design topology of themain board and T-Con board.

FIG 4 points out the component parts that fail on SMPS boards, faulty box capacitors, opto-couplers and electrolytic caps will cause the TV to attempt power-up then switch into protect mode, a shorted diode on the cold side of the SMPS will cause the same fault symptom. Resistors, mode control IC’s and power-resistors that fail (hot-side SMPS) will cause the TV to switch from stand-by mode into immediate protect mode (indicating a crucial component has a fault). MOSFET’s, IGBT’s, and power rectifiers that become shorted will blow the primary fuse on the SMPS and cause the TV to be completely unresponsive with no stand-by power (dead).

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FIG 5A illustrates the known components that cause X/Y sustain error’s on Philips plasma TV’s. TO-220 and TO-252 FETs that develop a short will usually blow the ceramic fuse on either X/Y board, causing shut down or black screen. Electrolytic caps that have high ESR will cause the X/Y board to shut down sometimes resulting in sound with no picture (y-board). IPM modules that develop an internal short will usually open a Pico fuse or ceramic fuse on X/Y boards causing board shut down. IPMs that develop a problem with SUS/UP-SUS/DOWN will cause the TV to have sound with no picture.

This concludes Quick Tips

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TV Model List

Sharp LCD/LED: 44 models

LC-50LB150U LC-50LB370U LC-50LE440U LC-50LE442U LC-50LE650U LC-50UB30U LC-52C6400U LC-52D43U LC-52D64U LC-52D65U LC-52D82U LC-52D85UN LC-52D92U LC-52E77U LC-52E77UN LC-52LE700UN LC-52LE810UN LC-52LE830U LC-52LE920UN LC-52SB57UN LC-52SE94U LC-60C46U LC-60C52U LC-60C6600U LC-60C8470U LC-60E69U LC-60E79U LC-60LE550U LC-60LE6300U LC-60LE660U LC-60LE750U LC-60LE810UN LC-60LE830U LC-60LE831U LC-60LE835U LC-60LE845U LC-60LE857U LC-60LE920UN LC-70C7450U LC-70LE550U LC-70LE640U LC-70LE734U LC-70LE755U LC-70LE857U

Philips Plasma: 10 models

42PF9631D/10, 42PF9936D/37, 42PF9946/12, 42PF9966/37 42PF9966D/37, 42PF9967D/10, 42PF9976/37, 50PFP5532D/05 50PFP5332D/37, 50PFL5708/F7

Philips LCD/LED 16 models

52PFL3603D/27 52PFL3603D/F7 52PFL5603D/27 52PFL5704D/F7 52PFL7403D/27 52PFL7403D/F7 52PFL7432D/37 52PFL7704D/F7 52PFL7762D/05 52TA648BX/37 55PFL3907/F7 55PFL4706/F7 55PFL5705D/F7 55PFL5907/F7 55PFL7505D/F7 55PFL7705DV/F7

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“Once again here's the case history layoutexample”

1) TV Model Number: Model number of TV issued by TV manufacturer(Example LC-52D85U).

2) TV Failure Symptom: The kind of problem the TV is having(Example Full start-up no picture, backlights only, protect mode). 3) Faulty Board: Which board inside the TV has the failure(Example T-Con Board).

4) Faulty Board Number: Manufactures Part Number of faulty board(Example CPWBX4023TPXZ).

5) Board Location Number Of Faulty Part(s): The location number of the faulty part(s)on the SMPS-board(Example Q6286).

6) Part(s) Failure Type: The way in which the part(s) have failed(Example 8-pin FET IC Q6286 no source voltage output (dead)).

7) Shop Notes: (If available) shop notes relating to the repair(Example 8-pin FET IC Q6280 replaced as a service precaution).(n.a. Means shop notes are not available.

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The actual Sharp & Philips TV case history beginsnow.

-Power Problems, Display Problems, Memory Problems-

Sharp LCD/LED TV Case history

1) TV Model Number: LC-50UB30U (4K LED-TV)

2) TV Failure Symptom: Full start-up, backlights only, smart code, then protect mode

3) Faulty Board: T-Con Board

4) Faulty Board Number: 0981-0250-7706

5) Board Location Number Of Faulty Part(s): F101, D116

6) Parts Failure Type: SMD fuse open, diode D116 shorted.

7) Shop Notes: This TV also had a V-SYNC problem on main board. Reload firmware if available.===============================================================

1) TV Model Number: LC-50LB150U (Smart LED-TV)

2) TV Failure Symptom: Full smart start-up, raster only, no image or menu, then protect mode

3) Faulty Board: Main Board

4) Faulty Board Number: TXDCB01K0590001

5) Board Location Number Of Faulty Part(s): Q704

6) Parts Failure Type: 8-pin FET IC Q704 no source voltage output.

7) Shop Notes: Electrolytic capacitor C719 high ESR value and replaced.

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1) TV Model Number: LC-50LE442U (Smart LED-TV)

2) TV Failure Symptom: TV shuts down into stand-by mode when programming channels


4) Faulty Board Number: 9JY0150CTN06100

5) Board Location Number Of Faulty Part(s): U3102

6) Parts Failure Type: Flash/EEPROM U3102 dead at SDA output.

7) Shop Notes: Flash/EEPROM doesn’t need programming. Update firmware if available.=========================================================

1) TV Model Number: LC-50LB370 (LED-TV)

2) TV Failure Symptom: Dead, no stand-by power

3) Faulty Board: SMPS/LED Drive

4) Faulty Board Number: PLTVEY701XAL5

5) Board Location Number Of Faulty Part(s): F9901, F9902, Q8100, Q9100,

6) Parts Failure Type: Box fuses F9901/02 open, FET’s Q8100/9100 shorted.

7) Shop Notes: R9111 out of Ohm value and replaced.=========================================================


2) TV Failure Symptom: Power-up, backlights flash once, and then shut down into protect mode

3) Faulty Board: LED Drive Board

4) Faulty Board Number: C500S01E01A

5) Board Location Number Of Faulty Part(s): Q37, R215

6) Parts Failure Type: SMD FET Q37 shorted, resistor R215 out of Ohm value.

7) Shop Notes: After repair update firmware if available.

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1) TV Model Number: LC-50LE440U (LED-TV)

2) TV Failure Symptom: Must un-plug TV to turn off, TV can be turned on again after 1 hour


4) Faulty Board Number: 9JY0139CTJ01100


6) Parts Failure Type: Flash/EEPROM serial clock error (SCL).

7) Shop Notes: Flash/EEPROM doesn’t need programming. Update firmware if available.==============================================================

1) TV Model Number: LC-52SE94U (LCD-TV)

2) TV Failure Symptom: Partial start-up, backlight flash, then protect mode

3) Faulty Board: Inverter Board

4) Faulty Board Number: RUNTKA394WJZZ

5) Board Location Number Of Faulty Part(s): Q7506D

6) Parts Failure Type: FET Q7506D shorted.

7) Shop Notes: Q7505D replaced as a service precaution.=============================================================

1) TV Model Number: LC-52LE700UN (LED-TV)

2) TV Failure Symptom: Star-up attempt, then protect mode

3) Faulty Board: SMPS

4) Faulty Board Number: RUNTKA604WJQZ

5) Board Location Number Of Faulty Part(s): PC7104

6) Parts Failure Type: Opto-Coupler PC7104 shorted on diode side.

7) Shop Notes: n.a.

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2) TV Failure Symptom: Full start-up, no menu, raster only, then backlights only, then protect mode


4) Faulty Board Number: RUNTK4910TPZQ

5) Board Location Number Of Faulty Part(s): IC6201

6) Parts Failure Type: Sync-PWM buck control IC no step down voltage output (dead).

7) Shop Notes: After repair update firmware if available. ===============================================================

1) TV Model Number: LC-52SB57UN (LCD-TV)

2) TV Failure Symptom: Partial start-up, then shut down into protect mode


4) Faulty Board Number: RDENCA235WJQZ

5) Board Location Number Of Faulty Part(s): D7125

6) Parts Failure Type: Diode D7125 shorted

7) Shop Notes: Regulator chip IC7121 intermittent feedback problems and replaced.

===============================================================1) TV Model Number: LC-52E77UN (LCD-TV)

2) TV Failure Symptom: Stand-by only, no full start-up




6) Parts Failure Type: DC-DC regulator chip IC7121 no DC voltage from output pin.

7) Shop Notes: SMD resistor R7124 out of Ohm value and replaced.

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1) TV Model Number: LC-52D43U (LCD-TV)

2) TV Failure Symptom: Power-on, brief backlight flash, then protect mode


4) Faulty Board Number: RUNTKA260WJZZ

5) Board Location Number Of Faulty Part(s): T7505B

6) Parts Failure Type: Step-down transformer T7505B open on primary side.

7) Shop Notes: n.a.==============================================================


2) TV Failure Symptom: Full start-up, no raster after 30 seconds, backlights only, protectmode


4) Faulty Board Number: CPWBY3723TPZZ


6) Parts Failure Type: PWM regulator IC25 dead at DC voltage output pin, no reading.

7) Shop Notes: IC24 regulator replaced as a service precaution.==============================================================


2) TV Failure Symptom: Distorted picture, solarized image


4) Faulty Board Number: CPWBX4010TPXZ


6) Parts Failure Type: Gamma correction chip IC5801 massive noise on v-Com signal trace (scope).

7) Shop Notes: After repair update firmware and drivers if available, for this model.

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1) TV Model Number: LC-52D85UN (LCD-TV)

2) TV Failure Symptom: Full start-up, brief welcome screen, backlights only, protect mode


4) Faulty Board Number: DUNTKF239FM05


6) Parts Failure Type: 8-pin FET chip IC Q6274 shorted between gate and drain pins.

7) Shop Notes: n.a.==============================================================

1) TV Model Number: LC-52D85UN (LCD-TV)

2) TV Failure Symptom: Full start-up, welcome screen, suddenly backlights only, protectmode




6) Parts Failure Type: Asynchronous buck regulator error at feedback pin (loop) and replaced.

7) Shop Notes: Feedback inductor L6272 out of uH value and replaced.==============================================================


2) TV Failure Symptom: Stand-by, then immediate protect mode




6) Parts Failure Type: Mode control chip IC7905 no drive signal pin #5 (dead).

7) Shop Notes: n.a.

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1) TV Model Number: LC-52E77U (LCD-TV)

2) TV Failure Symptom: Partial start-up the immediate protect mode




6) Parts Failure Type: Signal diode D7922 shorted.

7) Shop Notes: n.a.=============================================================


2) TV Failure Symptom: Partial start-up then shut down into protect mode





7) Shop Notes: n.a.==============================================================


2) TV Failure Symptom: Partial start-up, then immediate protect mode



5) Board Location Number Of Faulty Part(s): R7914

6) Parts Failure Type: Resistor R7914 out of Ohm value (open).

7) Shop Notes: n.a.

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2) TV Failure Symptom: Intermittent static picture, screeching


4) Faulty Board Number: DUNTKE046FE02

5) Board Location Number Of Faulty Part(s): C6003, C5890, C5892

6) Parts Failure Type: E-capacitors C6003/5890/5892 very high ESR levels.

7) Shop Notes: E-capacitor C6014 replaced as a service precaution.==========================================================

1) TV Model Number: LC-52C6400U (LED-TV)

2) TV Failure Symptom: Static audio, snapping sounds, noise


4) Faulty Board Number: DKEYMF733FM82


6) Parts Failure Type: Audio chip IC2703 very warm, distorted audio output signal (scope)

7) Shop Notes: Audio chip IC2703 not available. Entire main board replaced. =============================================================

1) TV Model Number: LC-60LE857U (3D LED-TV)

2) TV Failure Symptom: Partial start-up, then immediate protect mode, smart code


4) Faulty Board Number: RUNTKB116WJQZ


6) Parts Failure Type: Diode D7950 shorted.

7) Shop Notes: Power rectifier D7131 replaced as a service precaution.

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1) TV Model Number: LC-60LE845U

2) TV Failure Symptom: Sudden shut down into protect mode after full start-up




6) Parts Failure Type: PWM buck dead at DC output pin.

7) Shop Notes: Check inductor L9603 for proper uH value.

===========================================================


2) TV Failure Symptom: Stand-by then immediate protect mode




6) Parts Failure Type: Mode control chip IC7805 no source voltage output (dead switching).

7) Shop Notes: E-capacitor C7918 high ESR level and replaced.============================================================




4) Faulty Board Number: RUNTK4910TPZZ


6) Parts Failure Type: FET Q6210 shorted.

7) Shop Notes: SMD capacitor C6256 out of uF value and replaced.

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2) TV Failure Symptom: Partial start-up, then immediate protect mode


4) Faulty Board Number: RUNTKA798WJN1

5) Board Location Number Of Faulty Part(s): R7004

6) Parts Failure Type: Resistor R7004 out of Ohm value.

7) Shop Notes: After repair, update firmware for this model.==========================================================


2) TV Failure Symptom: No HDMI signal on any HDMI port




6) Parts Failure Type: HDMI processor IC1504 erroneous HDMI signal output, chip verywarm.

7) Shop Notes: IC1504 was not available. Entire main board replaced. Update firmware and drivers.==========================================================


2) TV Failure Symptom: Start-up attempt, then protect mode


4) Faulty Board Number: UNTKB285WJQZ

5) Board Location Number Of Faulty Part(s): CX7002

6) Parts Failure Type: Box capacitor out of uF value

7) Shop Notes: Spark-gap SG7001 charred and replaced.

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2) TV Failure Symptom: Full start-up welcome screen, then backlights only, protect mode, smart code


4) Faulty Board Number: DUNTKG477FM01


6) Parts Failure Type: PWM buck regulator erroneous DC output (weak trace on scope).

7) Shop Notes: Check L6203 for proper uH value before replacing IC6210. Update firmware.===============================================================

1) TV Model Number: LC-60C52U (LCD-TV)




5) Board Location Number Of Faulty Part(s): F701, F4702, Q4707, Q4708

6) Parts Failure Type: Fuses F701/4702 open, FET’s Q4707/08 shorted.

7) Shop Notes: Polypropylene capacitor C4708 out of uF value and replaced.

==============================================================1) TV Model Number: LC-60C52U (LCD-TV)



4) Faulty Board Number: CPWBX3520TPZK

5) Board Location Number Of Faulty Part(s): Q18, Q20

6) Parts Failure Type: SMD FET’s Q18, Q20 shorted.

7) Shop Notes: SMD capacitor C181 out of uF value and replaced.

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1) TV Model Number: LC-60C6600U (Smart LED-TV)






7) Shop Notes: n.a.==============================================================

1) TV Model Number: LC-60C8470U (3D LED-TV)

2) TV Failure Symptom: Full start-up welcome screen, then backlights only, protect mode, smart code




6) Parts Failure Type: Asynchronous regulator chip IC6202 no DC output signal (dead).

7) Shop Notes: After repair, update firmware.=============================================================


2) TV Failure Symptom: TV shuts down into stand-by when changing channels or volume


4) Faulty Board Number: NQP0000000094


6) Parts Failure Type: Flash/EEPROM error at serial clock pin SCL.

7) Shop Notes: Flash/EEPROM doesn’t need programming. Update drivers if available.

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2) TV Failure Symptom: Stand-by, immediate protect mode




6) Parts Failure Type: Control chip IC7603 dead at switching pins, error at feedback loop.

7) Shop Notes: IC7603 was not available. Entire SMPS board replaced.=============================================================






6) Parts Failure Type: SMD diode D6273 shorted.

7) Shop Notes: n.a.=============================================================







7) Shop Notes: Update firmware and drivers for this model after repair.

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1) TV Model Number: LC-60LE835U (3D LED-TV)

2) TV Failure Symptom: Start-up attempt, then shut down into protect mode, smart code

3) Faulty Board: SMPS/LED Driver Board


5) Board Location Number Of Faulty Part(s): R7305, Q7901

6) Parts Failure Type: Resistor R7305 out of Ohm value, NPN Q7901 shorted collector-base.

7) Shop Notes: SMD transistor Q7901 is underneath R7305 on flip side. Update firmware.==============================================================


2) TV Failure Symptom: Full start-up, welcome screen, backlights only, then protect mode


4) Faulty Board Number: RUNTK4512TPZA


6) Parts Failure Type: SMD PWM buck regulator IC6003 no output voltage, internal switching short.

7) Shop Notes: After repair, update firmware for this model.

===============================================================1) TV Model Number: LC-60LE750U (Smart LED-TV)




5) Board Location Number of Faulty Part(s): F7001, Q7601, Q7602

6) Parts Failure Type: Fuse F7001 open, FET’s Q7601/02 shorted.

7) Shop Notes: Disc capacitor C7623 out of pF value and replaced. Update firmware.

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1) TV Model Number: LC-60C46U (LCD-TV)






7) Shop Notes: Check inductor coil L5703 for proper uH value.

============================================================


2) TV Failure Symptom: Full start-up, no welcome screen, backlights only, protect mode


4) Faulty Board Number: RUNTK4570TPZA


6) Parts Failure Type: FET Q6210 shorted.

7) Shop Notes: SMD capacitor C6259 out of uF value and replaced. Update firmware.

=============================================================1) TV Model Number: LC-70LE857U (3D LED-TV)

2) TV Failure Symptom: Smart start-up, welcome screen, shut down, protect mode, smart code




6) Parts Failure Type: Bucking converter IC9606 no switching output pins #5/6 (dead).

7) Shop Notes: Check L9604 for proper uH value before replacing IC9606. Update firmware.

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2) TV Failure Symptom: Start-up attempt, then immediate protect mode, smart code




6) Parts Failure Type: Control chip IC7801 no switching signal output (dead scope trace),internal error.

7) Shop Notes: Check SMD resistor R7809 of IC7801 for proper Ohm value. Update firmware.===========================================================

1) TV Model Number: LC-70C7450U (3D LED-TV)

2) TV Failure Symptom: Start-up attempt, shut down into protect mode, smart code





7) Shop Notes: Check resistor R7305 for proper Ohm value. Update firmware after repair.=============================================================


2) TV Failure Symptom: Intermittent distorted picture interruption after TV warms up




6) Parts Failure Type: Timing Control BGA chip IC5801 loose solder-ball connection.

7) Shop Notes: IC5801 re-balled and reseated. Update firmware after repair.

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2) TV Failure Symptom: Start-up attempt, then shut down into protect mode, smart code





7) Shop Notes: Check resistor R7305 for proper Ohm value. Update firmware.==============================================================

Philips Plasma TVCase history

1) TV Model Number: 42PF9631D/10 (Plasma-TV)

2) TV Failure Symptom: Power-up attempt, then protect mode

3) Faulty Board: Y-Sustain Board

4) Faulty Board Number: FPF33R-YSS0042

5) Board Location Number Of Faulty Part(s): Q12, Q13, D217

6) Parts Failure Type: FET’s Q12/13 shorted, SMD diode D217 shorted.

7) Shop Notes: n.a.

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2) TV Failure Symptom: Power-up attempt, then protect mode

3) Faulty Board: Y-Sustain Board

4) Faulty Board Number: FPF29R-YSS0038

5) Board Location Number Of Faulty Part(s): C413, C419, C418

6) Parts Failure Type: Y-board E-capacitors C413/419 bulged, C418 very high ESR level.

7) Shop Notes: E-caps C404, C410 also high ESR and replaced.

============================================================1) TV Model Number: 42PF9966/37 (Plasma-TV)


3) Faulty Board: X-sustain Board

4) Faulty Board Number: 996500025106

5) Board Location Number Of Faulty Part(s): Q4009, Q4010, R4037

6) Parts Failure Type: X-board FET’s Q4009/4010 shorted, SMD resistor R4037 out of Ohm value.

7) Shop Notes: E-cap C4027 high ESR and replaced.============================================================

1) TV Model Number: 42PF9966/37 (Plasma-TV)

2) TV Failure Symptom: Start-up attempt, shut down into protect mode

3) Faulty Board: X-Sustain Board



6) Parts Failure Type: X-board IGBT Q4016 shorted, SMD resistor R4030 out of Ohm value.

7) Shop Notes: Check SMD FET’s Q4007, Q4008 for proper source voltage output (scope).

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2) TV Failure Symptom: Full start-up, quick menu, then raster only no picture/menu

3) Faulty Board: Logic Board (T-Con)



6) Parts Failure Type: LDO regulator U2021 no DC voltage output (dead)

7) Shop Notes: C2086 also very high ESR and replaced.==============================================================


2) TV Failure Symptom: Horizontal lines across screen (middle section)

3) Faulty Board: Y-Buffer Board (Lower)

4) Faulty Board Number: LJ92-00994A

5) Board Location Number Of Faulty Part(s): U5505, U5506

6) Parts Failure Type: Buffer scan IC’s both burned holes on top left of CMOS package.

7) Shop Notes: When replacing new Y-Buffer, adjust Y-drive, update firmware for this model.==============================================================


2) TV Failure Symptom: Power-up attempt (3 relay clicks) then protect mode


4) Faulty Board Number: LJ44-00058B

5) Board Location Number Of Faulty Part(s): C8023

6) Parts Failure Type: E-capacitor C8023 bulged and replaced.

7) Shop Notes: n.a.

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2) TV Failure Symptom: Power-up attempt, immediate protect mode




6) Parts Failure Type: X-board SMD FETs Q4001/4002 shorted.

7) Shop Notes: n.a.=====================================================


2) TV Failure Symptom: No start-up, immediate protect mode




6) Parts Failure Type: X-board IGBT’s Q4011/4012 both shorted.

7) Shop Notes: SMD resistor R4064 out of Ohm value and replaced.======================================================

1) TV Model Number: 50PFP5532D/05 (Plasma-TV)

2) TV Failure Symptom: Start-up attempt, immediate protect mode



5) Board Location Number Of Faulty Part(s): F4700, Q4102, Q4103

6) Parts Failure Type: X-board fuse F4700 open, FET’s Q4102/4103 shorted.

7) Shop Notes: n.a.

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2) TV Failure Symptom: Raster only no picture or menu

3) Faulty Board: Logic Board (T-Con)



6) Parts Failure Type: LDO regulator not producing output DC voltage, internal error

7) Shop Notes: E-caps C2043, C2195 also very high ESR levels and replaced.=============================================================


2) TV Failure Symptom: Start-up attempt, (3 relay clicks) then protect mode



5) Board Location Number Of Faulty Part(s): C8033, R8078

6) Parts Failure Type: E-capacitor C8033 bulged, resistor R8078 out of Ohm value.

7) Shop Notes: n.a.=============================================================


2) TV Failure Symptom: Start-up attempt, then protect mode



5) Board Location Number Of Faulty Part(s): DC8006

6) Parts Failure Type: E-capacitor DC8006 bulged

7) Shop Notes: n.a.

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1) TV Model Number: 50PFL5708/F7 (Plasma-TV)

2) TV Failure Symptom: Must unplug TV to turn off


4) Faulty Board Number: 56TXDCB01K0520003


6) Parts Failure Type: Flash/EEPROM serial data (SCL) error (scope)

7) Shop Notes: Flash/EEPROM doesn’t need programming. Update firmware if available.==========================================================

1) TV Model Number: 50PFL5708/F7 (Plasma-TV)

2) TV Failure Symptom: Sudden shut down after full power-up, then protect mode


4) Faulty Board Number: 756TXDCB01K0520003


6) Parts Failure Type: Asynchronous buck regulator U701 no output voltage (dead).

7) Shop Notes: Check L701 for proper uH value.==========================================================

1) TV Model Number: 52TA648BX/37 (LCD-TV)

2) TV Failure Symptom: Start-up attempt then immediate protect mode



5) Board Location Number Of Faulty Part(s): ZD951

6) Parts Failure Type: Zener diode ZD951 shorted.

7) Shop Notes: Diode D950 leaky and replaced.

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1) TV Model Number: 52PFL3603D/F7 (LCD-TV)

2) TV Failure Symptom: Full power-up, backlights only, then shut down into protect mode



5) Board Location Number Of Faulty Part(s): F100

6) Parts Failure Type: SMD fuse F100 open.

7) Shop Notes: n.a.===============================================================


2) TV Failure Symptom: Full power up, brief menu with static picture, backlights only, protect mode




6) Parts Failure Type: Power IC (level shifter) dead at pin #23. No 7V to output buffer.

7) Shop Notes: After replacing IC401 update firmware & drivers if available for this model.=============================================================


2) TV Failure Symptom: Power-up, backlight flash once, shut down into protect mode


4) Faulty Board Number: RDENC2591TPZF

5) Board Location Number Of Faulty Part(s): F7505A, MOS752A

6) Parts Failure Type: SMD fuse F77505A open, FET chip MOS752A shorted.

7) Shop Notes: The replacement FET chip was slightly larger than original, made custom fit.

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2) TV Failure Symptom: Full start-up, blue screen flash once, backlights only, protect mode



5) Board Location Number Of Faulty Part(s): FET300

6) Parts Failure Type: 8-pin FET chip FET300 no switching output on pins #5/6 (dead scope trace).

7) Shop Notes: FET300 was replaced with the same chip from junk board. Check FET301 also.===============================================================

1) TV Model Number: 52PFL7762D/05 (LCD-TV)

2) TV Failure Symptom: Power-up attempt, no backlights, shut down into protect mode


4) Faulty Board Number: RDENC2305TPZF


6) Parts Failure Type: Fuse F1001 open, FET’s Q1001/1002 shorted.

7) Shop Notes: n.a.===============================================================


2) TV Failure Symptom: Full start-up, brief menu, backlights only, protect mode



5) Board Location Number Of Faulty Part(s): FET301

6) Parts Failure Type: SMD FET FET301 shorted (GDS).

7) Shop Notes: FET303 was replaced as a service precaution.

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2) TV Failure Symptom: Stand-by, one relay click, then immediate protect mode




6) Parts Failure Type: Box capacitor C604 no pF reading (dead)

7) Shop Notes: n.a.==============================================================


2) TV Failure Symptom: Full start-up, no raster, backlights only, protect mode


4) Faulty Board Number: CPWBX3749TPZB


6) Parts Failure Type: SMD FET’s Q37, Q34 shorted.

7) Shop Notes: n.a.

==============================================================


2) TV Failure Symptom: Full start-up, backlights only, protect mode





7) Shop Notes: n.a.

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2) TV Failure Symptom: Start-up attempt, then immediate protect mode





7) Shop Notes: Check diode D950 for leakage.=============================================================






6) Parts Failure Type: Control chip IC601 no switching output signal on scope (dead).

7) Shop Notes: IC601 replacement from other board with same problem. Entire SMPS replaced.

==============================================================

1) TV Model Number: 55PFL5907/F7 (Smart LED-TV)



4) Faulty Board Number: ADTVC2415XE1


6) Parts Failure Type: Box capacitor C9910 no reading, (dead)

7) Shop Notes: Box capacitor C9911 replaced as a service precaution.

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1) TV Model Number: 55PFL3907/F7 (LCD-TV)

2) TV Failure Symptom: Partial start-up, backlights flash once, protect mode

3) Faulty Board: Inverter Board (Slave)

4) Faulty Board Number: 6632L-0614A


6) Parts Failure Type: FET’s Q23/24 shorted.

7) Shop Notes: n.a.===========================================================

1) TV Model Number: 55PFL4706/F7 (LED-TV

2) TV Failure Symptom: Partial start-up, then shut down into protect mode


4) Faulty Board Number: UPBPSPFSP003



7) Shop Notes: n.a.

============================================================


2) TV Failure Symptom: Full start-up, backlights only, protect mode


4) Faulty Board Number: LJ94-03321H


6) Parts Failure Type: Fuse F1 open.

7) Shop Notes: This TV had other main board problems with 12V supply.

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1) TV Model Number: 55PFL7505D/F7 (LED-TV)

2) TV Failure Symptom: Start-up attempt, immediate protect mode


4) Faulty Board Number: UPBPSP0SM002

5) Board Location Number Of Faulty Part(s): ICB801

6) Parts Failure Type: Mode control chip dead at switching output pin (bad feedback DC voltages)

7) Shop Notes: n.a.==============================================================

1) TV Model Number: 55PFL7705DV/F7 (LED-TV)

2) TV Failure Symptom: Full start-up, then shut down after 1 minute into protect mode


4) Faulty Board Number: A01RAMMA-001-DM


6) Parts Failure Type: LDO regulator IC3607 no output at pin #4 (dead) internal error. Chip very warm.

7) Shop Notes: n.a.

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TV Manufacturer Reset Codes

WARNINGThe following information is to help TV technicians fix code problems with various LCD/LED TV's and Plasma TV's. Many of these TV's are mis-programmed, locked, or in a programming mode that is not situated for home-use.

Be sure to record what the original values are before changing them, if you enter the wrong value while the TV is in service-mode it can cause permanent software damage to the TV and the TV will not work again. Use this information at your own discretion and don't put the TV in service-modeif you’re not sure what you are doing.

AKAI:AKAI Service MenuMethod 1Press the MENU key.Then press the 1, 9, 7, & 9 keys.The Service Menu will now be displayed on screen.To exit service mode, power off the TV.=====================================

AKAI Service MenuMethod 2Turn TV power on.Press the MENU, 8, 2, 0, & 2, keys on the remote control.The Service Menu will now be displayed on screen.To exit service mode, power off the TV.=============================================COBY:COBY Service Menu:Enter menu, move hi lite-bar to “audio” then enter 8893(Another method for Coby)Press Mode or Source key(s) then enter 2,5,8,0, then go to “other setting”, then select “shipment” then yes, TV is now in service mode. After exiting the service menu, turn TVpower off (to save the data).===============================================================

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DELL:DELL Service Menu:Service Code is 3355If 3355 does not work, use this sequence:Press and hold the Input or Source key - on the TV (not on the remote)continue to press and hold it until step 71. Press and release the Power key2. The TV turns off3. Press and release the Power key4. The TV turns on5. Wait until 10 seconds6. A message on the screen will say the TV has been reset7. Release the Input Source key============================================================DYNEXDYNEX Service Menu:Dynex Service Access Code Method 1Press the input key (or the source key) after which press 2,5,8,0 on the remote keys,then volume bar will go up to halfway on screen then TV shuts off.TV is back on and the menu is now displayed on screen. (see method 2 to continue)Dynex Service Access Code Method 2Press MenuPress 1,9,9,9Press ENTERIf the keys on the remote don't work just press the TV control keys on the side of the TV.============================================================

ELEMENT:ELEMENT Service Menu:Turn TV on..Press menu 0000Or press menu 1147TV is now in service mode.===========================================================

FUNAI:FUNAI Service Menu:Funai LCD Service Access CodeMethod 1Turn the TV power on using the POWER key on the TV.Press the STANDBY-ON, 2, 7, 1, & MUTE keys on the remote control.The Service Menu will be displayed on screen.To exit service mode, press the STANDBY-ON key on the remote.

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Funai LCD Service Access CodeMethod 2Turn the TV power off.Press and hold MENU key on the TV.Then press the STANDBY-ON key on the TV.The TV will turn on with the Service Menu displayed on screen.To exit service mode, press the STANDBY-ON key on the TV.

Funai LCD Service Access CodeMethod 3Turn the TV power off.Press and hold SETUP key on the TV.Then press the STANDBY-ON key on the TV.The TV will turn on with the Service Menu displayed on screen.To exit service mode, press the STANDBY-ON key on the TV.

Funai LCD Service Access CodeMethod 4Press the CH down & VOL down keys at same time.Then press the MENU key.The Service Menu displayed on screen.To exit service mode, turn the TV power off.

Funai LCD Service Access CodeMethod 5Press the CH up, CH down & VOL up keys at same time.Then press the MENU key.The Service Menu displayed on screen.To exit service mode, turn the TV power off.============================================================HAIER:HAIER Service Menu:Haier ******************************************Bring the menu up, move the hi lite-bar to “audio” then enter 8893 on remote keys(Another method for Haier)Press the 'Menu' keyThen enter 8893Press "OK". The TV is now in factory modeTo "Exit" from service mode, press the 'Exit' key on the remote control==============================================================HP:HP Service Menu:While the LCD TV is on, unplug the AC power cable.Then while pressing the INPUT & VOL down keys on the remote,plug the AC power cable back into the wall outlet.When it powers up you will see a small letter "k" appear in brackets on the screen.

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Then on the TV, press and hold down the VOL down & CH down keys and release.CH up & CH down keys navigate through screen menu.VOL up & VOL down keys adjust various field values.Turn the TV off to exit the Service mode.==============================================================

HISENSE:HISENSE Service Menu:In customer menu go to”Parental” enter 0000 then select”Clean All”then power the TV off and back on and first time setup menu will be on screen.For other models, same as the above model but in menu it is labeled “Lock”(Another Method for Hisense)Power on the TV.Press 'Menu" key to bring up User OSD menu.Select 'Sound => Balance.When the 'Balance' is "0", Enter {0 => 5 => 3 => 2} in sequence.Factory OSD will appear.Press the 'Standby' key then AC Turn OFF, and restart the TV, to "EXIT" Service Mode.

==============================================================

HITACHI:HITACHI Service Menu:There are many Hitachi reset codes try either one until the right code works.Hitachi TV Service Method 1Turn the TV power on.Press the MENU, MENU, 8, SELECT, keys on the remote.The Service Menu will be displayed on screen.Use the UP DOWN keys to select items.Use the LEFT RIGHT keys to change the data.Press the EXIT key to exit the Service mode.

Hitachi TV Service Method 2Turn the TV power off.Press and hold the INPUT key on the TV then press the POWER key.Hold both keys until the TV turns on with the Service Menu displayed on screen.Use the UP DOWN keys to select specific field options.Use the LEFT RIGHT keys to change data values.Press the EXIT key to exit the Service mode.

Hitachi TV Service Method 3Turn the TV power off.Press POWER & INPUT keys on the TV for more than 3 seconds.The Service Menu will now be displayed on screen.The letter "P" means picture and "A" means audio.Use the UP DOWN keys to select specific field options.

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Use the LEFT RIGHT keys to change data values.Press the EXIT key to exit the Service mode.==============================================================

INSIGNIA:INSIGNIA Service Menu:Power on the TV.press input key, then enter 2580(Another method for Insignia is)Power on the TV.Adjust the volume to zeroOn the the remote - Input, 9876, - then press OK within 5 seconds.If successfully done, the TV will default to FACTORY SET MENU screen.

===============================================================

JVC:JVC Service Menu:JVC LCD/PLASMA Service Access Code method 1Press the MENU key and go to the User Menu screen, make sure that the indicatorarrow is positioned and highlights "Picture Control".The keys on the top part of the remote are set to TV & VCR.Put the sleep timer to "0" minutes and while its being displayed on screen,simultaneously press the VIDEO STATUS & DISPLAY keys.The Service Menu will be displayed on screen.Use the number keys {1-9} used to select a particular category.Use the CH up CH down keys to select various options.Use the VOL up VOL down keys to change initial settings.Use the MUTING key to save the settings.Press the BACK key to exit Service Menu.

JVC LCD/PLASMA Service Access Code Method 2Simultaneously press "Display" & "Video Status" keys on the remote.Use 'Menu Up' & 'Menu Down' key to select a particular option to adjust.To change the data value to selected item, use > or < key on the remote.Press the "EXIT' key to 'Exit' from service menu.

=========================================================JVC Projector Service Access CodeUtilizing the remote control:Press the UP DOWN RIGHT LEFT keys.Now press the {ENTER} key.The Service Menu will be displayed on screen.To exit service mode, power off the TV.=========================================================

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LG:LG Service Menu:Press and hold <OK> keys on remote as well as the OK key on TV panel for a few seconds and the service menu will be on the TV screen.For some LG TV models, it may be required to press "Menu" keys on remote and TV panelsimultaneously for a few seconds to get too the service menu.In a few TV models, both methods work and they open different service menus.If the service menu requires a password, enter 0000 (four zeros).If 0000 doesn't work, use 7777 or 0413 or 8741 or 8743 or 8878.Now you can easily make changes to your desired settings.To save the data changes, press <OK> key on the remote.==========================================================

LG Extra Tech Tips:Using these hidden service menu's in LG TV, you can now enable USB drive use from settingsUSB option to 1. Once this feature is enabled, you can now insert any USB drive in USB slot located at the back of the LG TV and the TV will automaticallydetect it and you will now be able to play video or audio files that's saved in the USB drive (such as flash-drive etc) on your TV set. It is now possible to view images saved in the USB drive on the TV set.

All LG TV come with a factory hidden feature called "Hotel Mode".This feature can be enabled by settings Hotel option to 1 using the service menu. Once this feature is enabled, the Setup or Channel Search option will be disabled in the TV Settings.So this means no one else will be able to scan channels or fine tune channels. This is the reason why this option is called Hotel Mode.

LG Firmware:In order to update the LG TV firmware/software, you can use these easy steps:1. First download the required firmware files from official LG TV website.log on to LG TV website and search for your specific TV model. There you will find the official firmware files on a specific TV model page. Once the files areDownloaded save it to a PC.

2. Now connect a USB drive (such as flash-drive) in the PC and create a new folder LG_DTV in the USB drive.3. Copy the .epk file in LG_DTV folder.4. At this point insert the USB drive in your LG TV and do the following steps:

Press Home/Menu key on the TV remote, it will open up the Settings screen.Move the cursor hi lite-bar to OPTION but do not press the OK key. Now press the

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number 7 key 7 times on the remote and it will open up the firmware update screen.

If pressing the number 7 key 7 times does not work. Press the Fav key 7 times.If you want to restore default firmware, do the same steps above but instead press the number 9 key 7 times.============================================================

LG Service Menu InstructionsMethod 1Press and Hold <OK> key on remote and the OK key on the TV panel at the same time for a few seconds.

Method 2Press and hold the {MENU} key on the remote and the MENU key on the TV simultaneously for approximately 6-8 seconds.

Method 3Press and hold the {MENU} key ON THE REMOTE control until a required 4-digit password is displayed on screen.

LG Service Menu PIN/Password Codes8 7 4 18 7 4 37 7 7 70 0 0 08 8 7 80 4 1 3

LG LCD Monitor Service Menu:First turn off the LCD monitor, then press and hold the "MENU" key,then turn on the monitor. Release MENU key after the monitor is turn on.Press "MENU" key to open the OSD menu, at the bottom of menu, you can seea new selection to go into the factory service mode. Inside the factory service mode,you can observe affective information such as, manufacturer date, product model,F-engine Video chip-set version, LCD panel number, etc.

=============================================================MITSUBISHI:MITSUBISHI Service Menu:Power on the TV, then press Menu 123 or menu 2470The above code (123, or menu, 2470) is most popular but there aremany codes available for accessing service menu in various Mitsubishi TV models.You can try following codes one by one until you get access to service menu:(Other Mitsubishi Reset Codes)Mitsubishi Service Menu Method 1

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MENU 0 1 5 7Mitsubishi Service Menu Method 2MENU 0 3 5 3Mitsubishi Service Menu Method 3MENU 0 3 5 7Mitsubishi Service Menu Method 4MENU 1 2 5 7Mitsubishi Service Menu Method 5MENU 1 2 5 9Mitsubishi Service Menu Method 6MENU 1 3 7 0Mitsubishi Service Menu Method 7MENU 2 3 5 6Mitsubishi Service Menu Method 8MENU 2 3 5 7Mitsubishi Service Menu Method 9MENU 2 3 5 8Mitsubishi Service Menu Method 10MENU 2 3 5 9Mitsubishi Service Menu Method 11MENU 2 4 5 7Mitsubishi Service Menu Method 12MENU 8 2 5 7

1.Use the VIDEO & AUDIO keys to enter two optional groups of adjustments.2.{VIDEO} and AUDIO keys move through menus. + and - keys change settings.3.Press the ENTER key to save.4.Press the MENU key two times to exit.

=============================================================

OLEVIA:OLEVIA Service Menu:Methods on how to Enable or Disable Olevia Store mode or Demo ModePress the Menu key from the remote,Press the Down arrow key until you observe the word 'Picture' on the screen, then press the Right arrow key,Press the Down arrow key until you observe 'Mode' on the screen, then press the Right arrow key,Press the Down arrow key until you observe 'Power Up' on the screen, then press the Right arrow key,Press the Down arrow key until you observe 'Home' on the screen, then press the Enter key,Press the Menu key four times to exit out of the OSD service Menu.(Another Olevia Method for factory default)1.Press the "Menu" button on the remote.

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2.Use the up and down arrows on the remote to select "Settings," and then press "Enter key.3.Use the arrows once again to scroll to and highlight "Factory Default."4.Press "Enter." at this stage, the TV will power down and reset its self to factory settings.(Other Olevia default code unlock numbers)1111, 0000, 1234, 9999, 0123.===============================================================

PANASONIC:PANASONIC Service Menu:Panasonic factory resetTurn the TV ON-Hold Volume Down on the TV (on the TV panel not the remote)-Now (while continuing to press volume down) Hold the Menu key on the Remote.-You will see a screen that displays Self-Check in progress.-You will now see the Self-Check screen and all should display OK-Unplug the TV from the wall outlet while on the Self-Check screen when everything displays OK-Wait approximately 1 minuteWhen the TV is plugged back up, you will see the first time setup menu.(Other Panasonic Reset Codes):Generic Factory Reset Instructions for Panasonic TVsMethod 1If the TV is off or in standby, switch the TV on and set to view a TV channel.By using the keys on the front panel on the TV, press the Function [F] keyBy using the keys on the front panel on the TV, press and hold the Volume [-] keyAt the same time as step [3], press and hold the info / key on the remote controlIf this procedure has been accepted, the TV will show that it is performing a "Self- check".At the end of the "Self - Check", turn the TV off and unplug it from the wall outlet for approximately 25 seconds.When you plug the TV back into the wall outlet and turn the TV on it will perform a complete "first time installation".Method 2If the TV is off or in standby, turn the TV on and set to view a TV channelBy Using the keys on the front panel of the TV, press the Function FCN buttonBy Using the keys on the front panel of the TV, press the Volume [-] until a message appear on screen.=============================================================

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Panasonic service menu for projectors & older TV models:

Panasonic Projector Service Mode:Method 1Turn the TV Projector on.Now press the POWER key.A "Power Off" confirmation will be displayed on screen.Then press LEFT UP DOWN UP DOWN & ENTER keys.The Service Menu will be displayed on screen.To exit service mode, turn the TV Projector Off.

Panasonic Projector Service ModeMethod 2Turn the TV Projector on.Now press the POWER key.At this point press RIGHT UP DOWN UP DOWN & ENTER keys.The Service Menu will be displayed on screen.To exit service mode, turn the TV Projector Off.

Panasonic Projector Service MenuMethod 3Turn the TV projector on.Now press the MENU key.Now Go to "Options" menu.Then select "OSD".Now press and hold the ENTER key, until the Service Menu is displayed on screen.Press the MENU button to exit service mode.===========================================================Panasonic TV Service Mode (LCD/Plasma)Method 1Hold down the VOL down key ON THE TV.Now press the RECALL or INFO key 3 times on the remote.The Service Menu will now be displayed on screen.Use 1, 2,keys on remote to navigate main menu fields.Use 3, 4,keys on remote to navigate sub-menu fields.Use VOL up, VOL down, keys on the remote to change field value.Power off the TV to exit service mode to save the data.

Panasonic TV Service Mode (LCD/Plasma)Method 2Press and hold down the {VOL down} key on the TVThen press the 0 key 3 times on the remote control.To exit service mode, press the EXIT key or turn the power off.=============================================================

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PHILIPS:PHILIPS Service Menu:Turn TV onReset is achieved by holding the "Menu" key, for approximately 5 - 15 seconds.The menu key should be located on or around the frontal area of the set.(Another method for Philips is)Turn TV on.Push menu, select”Features”then select”current software info” push 062596-info on remote then push info again then ”initialize" appears in red and changes color to green then complete and ready for data change. Push power button to exit service mode.The above code (062596) is most popular but there are many codes available for accessing service menuin various Philips TV models. You can try following codes one by one until you get access to service menu:(Other Philips Reset Codes)062597, Menu, Info, Status061596, Menu061597, Menu162596, Menu, Status123654, Menu=============================================================Philips Extra Tech Tips:How TO EXIT Philips TV out of 'Store Mode'Turn on the TV then press "Menu" Scroll down to "Installation" once in installation.Go down to "Preferences"optionOnce your in "Preferences", go down to "Location" optionIn Location there is the choice to change this from "Store Demo" to "Home Use"Press "OK" on the remote control for "Home Use or Store Use.=============================================================Philips V-chip code:How To Reset Philips V-ChipPhilips TV's use a four digit code to control the v-chip.

The override code for Philip TV's is 0711, NOTE:it could display "Incorrect code" the first time to confuse or deceive you.If "Incorrect code" is displayed, simply enter 0711 again.To use it press the MENU key to get to the menus. Go up or down until you reach AUTOLOCK or SMARTLOCK option,depending on the model, and press the "right arrow" key on the remote control.Enter the override code, and enter it a second time if it says it is incorrect code.

Once in the AUTOLOCK or SMARTLOCK screen, go to BLOCK, and push the "right arrow" key.Go to BLOCKING OPTIONS and press the "right arrow" key. Go to MASTER DISABLE and press the "right arrow"key so that it displays "MASTER DISABLE ON".

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The v-chip is now reset to factory status.===============================================================

PIONEER:PIONEER Service Menu:Turn the TV off/in standby....press home menu key.Approximately 5 seconds turn the TV on , Integrated Menu will be displayed on screen.Hold Display key until Final Setup appears in the top menu.Use arrow left or right until 'yes' appears in lower section of menu.Hold enter until menu disappears from screen.Wait approximately 60 seconds.Power the TV off and unplug from the wall outlet for 5 or more minutes.(Another method for Pioneer)Press the INPUT key on the remote.The input list will appear on screen.Then press the 0 9 1 7 keys on the remote.To exit service mode, press the EXIT key on the remote.===============================================================

POLAROID:POLAROID Service Menu:Power on TV then simultaneously press and Hold vol down and CH down keys (or) hold vol up and CH up keys.TV is now in service mode.Polaroid FLM-3232 Reset V-Chip CodeThe override code for most Polaroid sets is 8202. (V-chip override)===============================================================

PROSCAN:PROSCAN Service Menu:Turn TV on.On the customer menu go to the setup, then select parental control menu, enter 0000 then select “clear channel list”. TV is now reset in service mode.===============================================================

RCA:RCA Service Menu:Turn TV onPress Menu, 1147,TV is now in service mode.===============================================================

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SANYO:SANYO Service Menu:Press and hold vol down key on TV, press and hold number 1 key on remote,volume status bar will go to halfway and Then TV shuts off.Turn the TV back on then you will see the first time setup screen menu.==============================================================

SAMSUNG:SAMSUNG Service Menu:There are many codes available for accessing service menu in various Samsung TV models.You can try following codes one by one until you get access to service menu:

Samsung TV Factory ResetMost modern Samsung TVs have a more efficient way to access reset mode.

Press and hold the 'exit' key on the remote for approximately 15 seconds until a reset screen appears.Follow the on screen prompts to reset the TV.

(Another method for Samsung is)Power off the TV using the remote control, then press the following keys quickly on the remote:

Mute, 182, power (TV will turn on in reset mode)(On some models, Factory Reset is on this menu, on some others, you must go into the “Options” sub-menu

Other Samsung Reset Codes:Display/Info Menu, Mute, PowerDisplay/Info P.STD, Mute, PowerP.STD + Help, Sleep, PowerP.STD + Menu, Sleep, PowerSleep + P.STD, Mute, Power

Press the Channel Up/Down keys to navigate between available on screen options.To change the values, press Volume Up/Down keys.Other Samsung reset codes:Method 1Put TV on standby and then push in series these keys on the remote: 'info, menu, mute, power'the TV will turn itself on from this point and display a menu.

Method 2Turn the TV power off. On the remote, press Mute followed by 1, 8, 2, Power in sequence.

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Method 3With the TV in standby mode, press the DISPLAY P.STD MUTE POWER on the remote.

Method 4With the TV in standby mode, press the SLEEP P.STD MUTE POWER on the remote.

Method 5With the TV in standby mode, press the DISPLAY MENU MUTE POWER on the remote.

Method 6With the TV in standby mode. On the remote, press Mute followed by 1, 1, 9, Enter in sequence.===============================================================

Samsung LCD Monitor Service Menu InstructionsPower on the LCD monitor and open the OSD menu.Set the Brightness and Contrast to 0.Then press and hold the "SOURCE or ENTER" key for 5 second until the "SERVICE FUNCTION MENU" appears.===============================================================

How To Disable / Enable "Store Mode (Shop Mode)" on most Samsung TVsThere are four methods for removing your TV from Shop Mode or Store Demo Mode.If the first method does not work, try the proceeding methods (1,2,etc).

Method 1To remove your TV from Shop Mode or Store Demo Mode, follow these steps:

Press the Volume key on the side panel of your TV. If your TV does not have a side panel,press the Volume key on the front panel. The TV displays the volume bar.Press the Menu key on the side panel or front panel of your TV for about seven seconds.Again, if your TV does not have a side panel, press the Menu key on the front panel.If Dynamic or Dynamic Mode is displayed on the screen,then the TV has been removed from Shop Mode or Store Demo Mode.

Method 2Press the Volume key on your remote. The TV displays the volume bar.Press the Menu key on the side panel of your TV for about seven seconds. Once again,if the TV does not have a side panel, press the Menu key on the front panel.If Dynamic or Dynamic Mode is displayed on the screen,then the TV has been removed from Shop Mode or Store Demo Mode.

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Method 3Press and hold the Volume key on your TV. The TV displays the volume bar.While you are holding the Volume key, press the Menu key on the side panelof the TV for approximately seven seconds. Once again, if the TV does not have a side panel,press the Menu button on the front panel. If Dynamic or Dynamic Mode is displayed on the screen,your TV has been removed from Shop Mode or Store Demo Mode.

Method 4Change your TV to the "TV" source. The TV source is the coax (RF) source.If you have anything connected to this source it does not matter.Press the MENU button.Use the up or down key to select the "Setup" portion of the menu, and then press the ENTER key.Now the "Plug & Play" option should be highlighted if it is not use the up or down arrow to select"Plug & Play" option, and then press ENTER key.NOTE: If the "Plug & Play" option is grayed out and can not be selected this indicates that you are noton the TV (Coaxial (RF) source. go back to step 1.Follow the instructions on screen. When the options comes up select "Home" instead of "Shop".Go through the plug and play option until finished and your TV will no longer be in ShopMode or Store Demo.===============================================================

SEIKI:SEIKI Service Menu:Turn TV On.Press Menu, 0000TV is now in service mode.===============================================================

SHARP:SHARP Service Menu:With the LCD TV on, unplug the AC power cable.Then while pressing the INPUT & VOL down keys on the remote,plug the AC power cable back into the wall outlet.When the TV powers up you will see a small letter "k" appear in brackets.Then on the TV, press and hold VOL up & CH down keys and release.The Service Menu will be displayed on screen.Use CH up CH down keys to navigate, Use VOL up VOL down keys to adjust the value.===============================================================

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SONY:SONY Service Menu:Turn on the TVThen press and hold down the up arrow on the remote controlWhile holding it down, press and release the Power [standby]key on the remote control then let go of the up key.TV will automatically turn off and then turn on again with its memory cleared.

(Another method for Sony is)First power off the TV using the remote, then press following keys quickly on your TV remote:Hold “arrow up” on remote and push power key on tv (tv is on and in factory mode)It'll show the hidden service menu on the TV screen.

(Another method for Sony is )First power off the TV using the remote, then press following keys quickly on the TV remote:Display, 5, Volume Up, Power (TV is on and in factory mode) It'll show the hidden service menu on the TV screen.Once the TV enters into Sony service menu, you can press Menu (or Options)key again on the remote to switch between various service modes such as Digital, Chassisand VPC.

To navigate between available options press 1 or 4 keys.To change or modify their values press 3 or 6 keys.To save your changes, just press Mute + 0 (or Enter) keys on the remote.To restore settings to factory defaults, press 8 + 0 (or Enter) keys.

NOTE: For some newer models the above methods may or may not work.Use following key sequence to access service menu in the newer models:While TV is on, press Left + Right + Mute + Center key + Mute + Menu keys.NOTE: You may also press Display (or i+) + 5 + Volume Down + Power keyson the remote to enter in Self Check mode. This mode shows the total usagehours of the Sony TV set.

===============================================================

Sony Extra Tech Tips:Sometimes sets can get stuck in store mode -If the TV has strange behavior like settings reverting by themselves automaticallyor scrolling banners through the TV screen, it is very possible that the TV is in store mode.

Press Home key on remote controlEnter settings menuChoose set-up

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Select auto start-up and choose the location as 'Home' which will take it out of store-mode.

Sony Service menu:Sony Service Menu Method 1Put the TV in standby mode then press the following keys on the remote: DISPLAY 5 VOL-up POWERSony Service Menu Method 2Put the TV in standby mode then press the following keys on the remote: DISPLAY 5 POWERSony Service Menu Method 3Put the TV in standby mode then press the following keys on the remote: DISPLAY 5 PICTURE POWERSony Service Menu Method 4Put the TV in standby mode then press the following keys on the remote: DISPLAY 5 VOL-up PICTURE POWERExit Service Menu = <Power>

Sony Service Menu Navigation Tips

Menu Next = <1> key

Menu Previous = <4> key

Category Next = <2> key

Category Previous = <5> key

Adjust Up = <3> key

Adjust Down = <6> key

Save New Settings = <MUTE> <ENTER> keys

Restore Factory Defaults = <8> <ENTER> keys

==============================================================

SYMPHONY:SYMPHONY Service Menu:Turn TV On.Press Source or Input Key, then 2580TV is now in service mode.==============================================================

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TOSHIBA:TOSHIBA Service Menu:Toshiba LCD Service CodePress the {MENU} key on the remote.Then Highlight the "Picture" icon.Press the 9 3 0 1 keys on the remote.The OK key will access/navigate through various modesVOL up, VOL down, {P+} & {P-} keys move through options and change values.To exit service mode, press the MENU key.===============================================================

Toshiba TV/CRT Service Menu Code Method 1Press and hold the MUTE key on the remote.Then press the MENU key on the TV's front panel.CH up & CH down keys select optionsVOL up & VOL down keys change valuesTo exit service mode, turn the power off.

Toshiba TV/CRT Service Code Method 2Turn the TV on.Press the MUTE key three times on the remote.Press the MUTE key again on the remote and hold.Then press the MENU key on the TV's front panel or siade panel.Release both keysThere should be a letter "S" on the upper right hand side of the screen.Press the MENU key on the TV's front panel once again.CH up & CH down keys select optionsVOL up & VOL down keys change valuesTo exit service mode, turn the power off.

Toshiba TV/CRT Service Code Method 3Turn the TV on.Press the MUTE key twice on the remote.Press the MUTE key again on the remote and hold.Then press the MENU key on the TV's front panel.Release both keysThere should be a letter "S" on the upper right hand side of the screen.Press the MENU button on the TV's front panel again.CH up & CH down keys select optionsVOL up & VOL down keys change valuesTo exit service mode, turn the power off.

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Toshiba TV/CRT Service Code Method 4Turn the TV on.Press the MUTE key on the remote.Press the MUTE key again on the remote and hold.Then press the MENU key on the TV's front panel.Release both keysThere should be a letter "S" on the upper right hand side of the screen.Press the MENU key on the TV's front panel again.CH up & CH down keys select optionsVOL up & VOL down keys change valuesTo exit service mode, turn the power off.

Toshiba TV/CRT Service Code Method 5Press and hold the {VOL down} key on the TV and the {9} key on the remote control forapproximately 5 seconds.CH up+ & CH down keys select optionsVOL up & VOL down keys change valuesTo exit service mode, press the MENU key or turn the power off.===============================================================

VISION QUEST:VISION QUEST Service Menu:Turn TV On.Press Source or Input key, then 2580TV is now in service mode.===============================================================

VIZIO:VIZIO Service Menu:Turn TV onIn customer menu under “Help” option is Factory Default, then enter 0000

(Other Vizio reset methods)Vizio Service Menu:

Method 1Turn The TV off.Press and hold the CH up & CH down keys on the TV.Then press and release the POWER key on the TV.Release the CH up & CH down keys.Now press the MENU key on the remote.You will see a regular menu up, but it will have an "F"in the bottom right hand corner of the menu (This is for factory).Press and hold the MENU key for few seconds.

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The Service Menu will be displayed on screen.Vizio Service Menu

Method 2Turn The TV off.Press and hold the CH up & CH down keys on the TV.Then press and hold the POWER key on the TV.Keep all three keys pressed for few seconds.Now press the MENU key on the remote.You will see a regular menu up, but it will have an "F"in the bottom right hand corner of the menu (This is for factory).Press and hold the MENU key for few seconds.The Service Menu will be displayed on screen.Vizio Service Menu

Method 3Press and hold the EXIT key on the remote for 3 seconds then release it.Then press the 1 2 3 keys on the remote.To exit, press the EXIT key.

For other Vizio models VA320E/VA320M/VA370M/VT420M:Press "Menu" and then press the following combination: "1," "9," "9," "1"The service menu will be displayed on screen.==============================================================

Vizio Extra Tech Tips:Vizio Netflix Reset:From the first selection screen it will be on the Netflix app, press these keys on the remote:up, up, down, down, left, right, left, right, up, up, up, up,then a screen will come up with the basic account information attached to the Netflix app and also the software version.Select Disable with the remote.This selection will remove the account information from the Netflix appthus allowing the TV owner to re-attach their TV to a new account orreset a faulty Netflix app.==============================================================

VIORE:VIORE Service Menu:Method 1Press and hold the MENU key on the remote for approximately 15 seconds.A menu with an option for the Service Menu 'Factory Settings' will be displayed on screen.To exit service menu, press the MENU key.

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VIORE Service MenuMethod 2Press and hold the MENU key on the remote and the MENU key on the TV at the same time for approximately 15 seconds.A menu with an option for the Service Menu 'Factory Settings' will be displayed on screen.To exit service menu, press the MENU key.==============================================================

WESTINGHOUSE:WESTINGHOUS Service Menu:Unplug the AC power from the LCD TV.Wait approximately 35 secondsThen plug AC cord back in LCD TV.Now press and hold the power key (on the lower left hand side on the TV) for approximately 15 secondsThe Westinghouse logo will appear. Then go to "Menu" then "Settings" scroll down to "Factory Reset" then click "Yes".This method is also to fix HDMI ports not working on these particular TV's.==============================================================

This concludes Factory Reset Codes.

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Conclusion

This manual is dedicated to the greatest technicians David Maltz, Jestine Yong, Sunny, Teonna Flags and Micheal B Danish. For any questions or concerns with Sharp LCD/LED and Philips Plasma/LCD TV Case History Vol 1, you can email me at [email protected]

All material and illustrations in this manual are original, written, compiled, and illustrated by Damon Diode at Tech Society in USA.

To your success,

Damon C Morrow Author of “Sharp LCD/LED and Philip Plasma/LCD TV Case History Volume 1” andPlasma TV Repair GuideLCD TV Repair SecretsLCD TV SMPS RepairLCD TV Mainboard Power FaultsSamsung SMPS Case History Toshiba LED/LCD TV Repair case history 1Sony LED/LCD TV Repair case history 1LG Plasma TV Case History 1Panasonic 3D LED And Plasma Smart TV Vol1Samsung-Sony-Toshiba-Vizio TV Case History Vol 1Samsung Curved and Slim 4K UHD LED TV Case History Volume 1

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http://www.plasmatvrepairguide.com/ledtvrepairv1/samsungcurvedtv1/

http://www.plasmatvrepairguide.com/ledtvrepairv1/

http://www.plasmatvrepairguide.com/panasonic-3d-led-and-plasma-smart-tv-vol-1

http://www.plasmatvrepairguide.com/lg-plasma-tv-case-history-1

http://www.plasmatvrepairguide.com/sony-led-lcd-tv-repair

http://www.plasmatvrepairguide.com/toshiba-lcd-led-case-histories

http://www.plasmatvrepairguide.com/samsungsmpscasehistory

http://www.plasmatvrepairguide.com/lcdtvmainboard

http://www.plasmatvrepairguide.com/lcdtvsmps

http://www.plasmatvrepairguide.com/lcdtvrepairsecrets

http://www.plasmatvrepairguide.com/

mailto:[email protected]

Recommended Resources

Electronics Repair Ebooks1) http://www.jestineyong.com/resources-2/

List Of Electronics Spare Part Suppliershttp://www.jestineyong.com/category/electronic-suppliers/http://www.ebay.comhttp://www.shopjimmy.comhttp://www.encompassparts.comhttp://www.iccfl.comhttp://www.aliexpress.com

Electronics Repair Websites1) www.ElectronicRepairGuide.com2) www.Anatekcorp.com3) www.Epanorama.net/links/repair.html

Kent Liew’s Electronics Repair Ebooks

1) http://www.jestineyong.com/repairing-guides-by-kent/

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http://www.jestineyong.com/repairing-guides-by-kent/

http://www.Epanorama.net/links/repair.html

http://www.Anatekcorp.com/

http://www.ElectronicRepairGuide.com/

http://www.aliexpress.com/

http://www.iccfl.com/

http://www.encompassparts.com/

http://www.shopjimmy.com/

http://www.ebay.com/

http://www.jestineyong.com/category/electronic-suppliers/

http://www.jestineyong.com/resources-2/

FREE Bonus EbookLG LED & LCD TV Case History

Volume 1 Memory Problems, Power Problems, Display Problems

You cannot give this E-book away for free.You do not have the rights to redistribute this E-book.

Copyright@ All Rights Reserved

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Content

1 Documented Service Records – All Level Technicians 67

2 Quick TIPS on LG LED Driver Board 69

3 Quick TIPS on LG T-CON Board Components 74

4 25 LG LED & LCD TV models covered in this short case history

76

5 The actual LG LED & LCD TV short case history begins now. 77

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DAMON MORROWLG LED & LCD TV Case History Vol.1

LG LED & LCD TV: Memory Problems, Power Problems, Display Problems Documented Service Records - All Level Technicians

For Intermediates, Professional Technicians And Advanced Students

Documented Service Records – All Level Technicians.Power Faults - Display Faults - Memory Errors

The following information in this LG case history e-book was written andcompiled according to Damon Morrow's in-house service records (or casehistory) of LG LED & LCD TV failures. This e-book documents a goodrange of LG LED & LCD TV faults including various memory error's,display symptoms, and power failures. This LG case history e-book is veryeasy to use, and it simply lists a fair range of popular problems and secretivefixes for LG LED & LCD TV's. The information contained in these pagesare complete with the model number of the LG LED & LCD TV, theboard-number of the faulty circuit, and the part-location number of thedefective component(s).

This LG e-book is a simple and affective reference tool, exposing components which have failed, resulting in performance issues with LG LED & LCD TV's. This e-book documents known symptoms on LG LED &LCD TV's such as stand-by power only, dead-no power, no start-up cycle, noaudio, and much more. The components and IC's which have failed are listedin this e-book, and they are mainly standard parts and IC's. Standard parts such as diodes, resistors, mosfet's, 6-pin NPN's, capacitors, and IC's such as memory IC's, control IC's, and bucking IC's. The test equipment used while compiling this LG case history information was a standard DVM meter (Fluke), Capacitor meter (uF/ESR) and a 60Mhz digital Oscilloscope (the basics all technicians use).

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The scope was primarily used to troubleshoot IC chips and observe their wave shaping performance, feedback-loops, start-pulses, duty-cycles, serial-clock, and gate-circuits. However, in this e-book all of the troubleshooting has been done for you, with the causes and bad parts listed.

This LG e-book is for technicians of all levels, there are no complex diagrams or detailed graphics involved. This e-book is not a case history of troubleshooting and circuit evaluation (as with my other books). This e-bookis a simple case history of LG LED & LCD TV parts failure. Again, all of the troubleshooting work has been done for you and compiled in a simple and easy to follow format. This e-book is written text information correlating to shop records. There are no pictorial graphics or illustrative diagrams used in this e-book as it is not required i.e. 'case-history'.

Note: Below is an example of how the Service-Case-History Records of each LG LED & LCD TV model are laid out in this e-book, and also shows the meaning of each category.

LG LED & LCD TVService Case history Layout Example

1) TV Model Number: Model number of TV issued by TV manufacturer(example 42LE5400).

2) TV Failure Symptom: The kind of problem the TV is having(example No stand-by, no start-up attempt, protect mode only then dead). 3) Faulty Board: Which board inside the TV has the failure(example SMPS).

4) Faulty Board Number: Manufactures Part Number of faulty board(example EAY60803101).

5) Board Location Number Of Faulty Part(s): The location number of the faulty part(s)on the SMPS-board(example D511, D507 F103, F101).

6) Part(s) Failure Type: The way in which the part(s) have failed(example Diode's D511, D507 shorted, Fuse F103, open).

7) Shop Notes: (If available) shop notes relating to the repair(example D506 & F101 were replaced as a service precaution (F101 should have opened). Use scope and check 'soft-start' signal IC501).(n.a. Means shop notes are not available.

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The following are some basic components that fail on LG LED & LCD TV's

Quick Tips On LG LED Driver Board ComponentsQuick Emphasis on LG LED Driver Component Faults & Error's

LED driver boards are the boards that supply the LED-array which provide an efficient back light source for the LCD panel. A lesser known fact in the TV repair business is how often LED driver IC chips fail along with their connected switching FET's. LED back light source are a new and popular design by engineers because LED's are a low-voltage light source, which only require a constant DC-voltage or current to function at peak performance. TV engineers also choose LED back lighting because LED's can be configured to various power-supply options when developing a particular design topology (current mode driver IC chip, or voltage mode driver IC chip). This increases the safety factor and especially longer stand-by power.

While LED's are operating, all of the stringed LED's in the strip must be protected from fluctuations in the line-voltage rail. This is because the changes in voltage will result in a disproportionate change in source current (sink), and this will affect changes in the light-output of the LED's. This is because the LED output is directly proportional to its input current and is thereason why LED's have a rated current range. Some lower-end LED TV manufacturers design their LED driver boards to produce a higher voltage/current output then what the LED's are rated for (especially at PWM peak). Some LED TV manufacturers do this because the LED's will be brighter at maximum PWM levels, but the bad side to doing this is the LED's will now degrade much faster due to the higher temperatures internally, which shortens the life of the LED's and especially the LED driver chip where its boost-converter becomes very warm and most driver-chips are installed on the LED board with no heat sink, this is especially bad for larger sized LCD screens (55-75in).

In a general sense LED driver chips are very important in trying to preserve the life of the LED's and yet LED driver chips have a multitude of other functions. But the two most important driver functions are dimming and color changing. Dimming is done by using a reduction in the forward current, this action happens by pulse width modulation (PWM). Because by using PWM the frequency range is huge, from just a hundred modulations

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per second to hundreds of thousands of modulations per second in which theLED's appear to have have a continuous light output with no flicker visible to the naked eye.

LED driver chips fail due to an extreme overload of LED's to drive and modulate, especially on large sized LCD screens which require a large array of LED's on a back-panel strip. LED driver chips also fail from rookie designers using the wrong voltage rating of the driver chip against what the LED's are rated for. Using the wrong voltage rating of a driver chip to operate LED's of a higher or lower voltage requirement will cause higher thermal conditions of the driver IC. For example using a 15V driver IC on a 10V LED load will significantly shorten the life of the driver IC. Balancing thermal conditions with LED driver boards are a tough task for LED TV manufacturers, and lower-end LED TV models don't achieve this balance. An example of balancing these thermal conditions are in Fig 1AB.

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In Fig 1AB the LED's at Ch.1 contain a forward voltage equal to 3.5V and the LED's at Ch.2 have a forward voltage equal to 3.2V. This means if the highest voltage threshold is achieved, each LED current sink will have an adequate amount of space to produce the proper level of current to set the light output properly.

In Fig 1AB, if the LED voltage (V-LED) is regulated too low, the highest voltage LED string will fall out of regulation and hit the dropout point whichdeclines the output current. Dropout voltage is the voltage level achieved when the current sinks in the back-light controller begin to drift out of current regulation. On the contrary, if the LED voltage is regulated too high, each LED string will have an abundance of regulated voltage and proper current output, but unwanted power will dissipate across the current sink andcause unnecessarily high thermal conditions resulting in extra power and heat dissipation. In Fig 1AB the LED's need 71mA to properly provide back-lighting too the LCD panel, but the LED's on Ch.1 have a higher forward voltage than Ch.2 needing 35V to get to 71mA.

With this kind of system where the voltage supply (Vin) is lower than the V-LED, a step-up boost converter is used to produce power to the LED strings.The output voltage of the boost converter drives all the LED strings in the strip. When programmable driver chips fail it is usually at the SCL pin (serial-clock), or OE (output Enable) logic pin for the node of each LED string (MUX).

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LED driver chips that are I2C based, means they have an EEPROM functionthat stagnates at the serial-clock pin causing improper operation of the driverchip. Sometimes a quick trick that will reset the I2C driver chip are as follows:

1 Turn TV off, then run a jumper wire between Vdd and the SDA pin2 Turn the TV on (10 seconds) back lights may flicker a few times3 Now disconnect jumper wire starting at the SDA pin then turn TV off4 Disconnect other end of jumper wire from Vdd pin5 Turn the TV on, the LED driver board should operate normally.

You can access further settings by entering the TV-service mode key commands and alter other various settings of the LED back light.

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The following are other failures on the LED driver board

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Quick Tips On LG T-Con Board ComponentsQuick Emphasis on LG T-Con Board Component Faults & Error's

The following are other failures on the T-Con board

6-pin transistors on LG T-cons (and other manufacturers) are becoming moreand more popular. Some of these devices have resistors internally, and these 6-pin transistors are known for not producing an output voltage. The other components on the T-con which fail often are standard parts such as FET's, SMD FET's and most of all the Power-Supply chip for VCOM and the panelvoltage. You can see the pin failures at Fig 5AB. When a switching problem occurs the scope will reveal how weak the signal is or there won't be a switching signal at all, and the chip tends to get very warm.

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This concludes LG Quick Tips

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25 LG LED & LCD TV models covered in this short case history12 LG LCD Models:

47LH300C-UA, 47LF11-UA, 47LD452C-UA, 47LD650H-UA, 42LH4000-ZA42LG7000-ZA, 42LG70-UG, 37LD452B-UA, 37LD320H-UA, 32LN530B-UA32LV2400-UA, 32LN5310-UB

13 LG LED Models

60LB7100-UT, 55LA6200-UA, 55UB8500-UA, 55LB7200-UB, 47LN5750-UH47LW5600-UA, 47LN5400-UA, 47LS4600-UA, 42LV5500-UA, 42LS3400-UA42LE5400-UC, 42LS5700-UA, 37LV3500-UA

“Once again here's the case history layout example”LG LED & LCD TV

Service Case history Layout Example

1) TV Model Number: Model number of TV issued by TV manufacturer(example 42LE5400).

2) TV Failure Symptom: The kind of problem the TV is having(example No stand-by, no start-up attempt, protect mode only then dead). 3) Faulty Board: Which board inside the TV has the failure(example SMPS).

4) Faulty Board Number: Manufactures Part Number of faulty board(example EAY60803101).

5) Board Location Number Of Faulty Part(s): The location number of the faulty part(s)on the SMPS-board(example D511, D507 F103, F101).

6) Part(s) Failure Type: The way in which the part(s) have failed(example Diode's D511, D507 shorted, Fuse F103, open).

7) Shop Notes: (If available) shop notes relating to the repair(example D506 & F101 were replaced as a service precaution (F101 should have opened). Use scope and check 'soft-start' signal IC501).(n.a. Means shop notes are not available.

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The actual LG LED & LCD TV case historybegins now.

-Power Problems, Display Problems, Memory Problems-

LG LCD TV Case history

1) TV Model Number: 32LN5310-UB

2) TV Failure Symptom: TV on with back lights and audio with no picture, then protect mode


4) Faulty Board Number: EBT62007604


6) Parts Failure Type: Serial Flash/EEPROM chip IC1300 dead at Pin #6 CLK signal.

7) Shop Notes: Flash/EEPROM must be programed before install.===================================================================


2) TV Failure Symptom: TV stuck in stand-by mode, will not turn fully on




6) Parts Failure Type: I2C Flash/EEPROM IC104 write-control error (WC) pin #7.

7) Shop Notes: Serial Flash/EEPROM IC1300 was replaced as a service precaution.===================================================================


2) TV Failure Symptom: TV turns off when changing INPUT-Select options


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6) Parts Failure Type: Serial Flash/EEPROM chip IC1300 serial I/O error at pin #2.

7) Shop Notes: Flash/EEPROM must be programed before install.============================================================

1) TV Model Number: 32LV2400-UA

2) TV Failure Symptom: TV will not turn fully on, stand-by only


4) Faulty Board Number: COV31310601


6) Parts Failure Type: Flash/EEPROM U18 no clock-signal (CLK) pin #6

7) Shop Notes: Flash/EEPROM must be programmed before install.============================================================





5) Board Location Number Of Faulty Part(s): EL08, CX01, Q202, C226

6) Parts Failure Type: Fuse EL08 open, box cap CX01 out of uF value, switcher Q202 shorted.

7) Shop Notes: Disc capacitor C226 out of pF value and replaced.===============================================================


2) TV Failure Symptom: Stand-by only, no main power-up



5) Board Location Number Of Faulty Part(s): IC1, Z204

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6) Parts Failure Type: Opto-isolator IC1 shorted at diode side, Zener diode Z204 shorted.

7) Shop Notes: Disc capacitor CY1 replaced as a service precaution.===============================================================

1) TV Model Number: 32LN530B-UA

2) TV Failure Symptom: Back light only, no picture raster, then shut down into protect mode

3) Faulty Board: T-Con

4) Faulty Board Number: 6871L-3203D



7) Shop Notes: n.a.================================================================


2) TV Failure Symptom: TV on, scrambled menu raster, with pattern lines, then shut down into protect mode




6) Parts Failure Type: Flash/EEPROM U5 no serial-data (SDA) pin #5.

7) Shop Notes: Flash/EEPROM must be programmed before install. Check SMD R12 proper Ohm value.=====================================================================


2) TV Failure Symptom: Negative picture image, bad contrast static dark raster




6) Parts Failure Type: Dead VCOM signal from Timing IC U10.

7) Shop Notes: U10 was not available. Entire T-con board replaced.

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2) TV Failure Symptom: Bad audio quality, then shut down into protect mode

3) Faulty Board: Speakers

4) Faulty Board Number: EAB62831401

5) Board Location Number Of Faulty Part(s): Left speaker of speaker-set

6) Parts Failure Type: Left speaker near zero Ohm's (shorted).

7) Shop Notes: Both speaker sets were replaced as a service precaution.============================================================




4) Faulty Board Number: EAY62810301



7) Shop Notes: Zener diode ZD201 replaced as a service precaution.============================================================





5) Board Location Number Of Faulty Part(s): F100, Q101, C102

6) Parts Failure Type: Fuse F100 open, switcher Q101 shorted, disc capacitor C102 out of pF value.

7) Shop Notes: n.a.============================================================

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1) TV Model Number: 37LD320H-UA

2) TV Failure Symptom: No back lights, then shut down into protect mode

3) Faulty Board: SMPS/Inverter


5) Board Location Number Of Faulty Part(s): T704

6) Parts Failure Type: Inverter transformer T704 open at secondary end.

7) Shop Notes: T703 replaced as a service precaution.================================================================





5) Board Location Number Of Faulty Part(s): F100, Q801, R622

6) Parts Failure Type: Fuse F100 open, switcher Q801 shorted, SMD resistor R622 out of Ohm value.

7) Shop Notes: SMD R622 located on flip side of Q801.=================================================================







7) Shop Notes: Electrolytic capacitor C509 high ESR and replaced.

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1) TV Model Number: 37LD452B-UA

2) TV Failure Symptom: Stand-by only, no full power-up


4) Faulty Board Number: EBR72965419


6) Parts Failure Type: Flash/EEPROM IC103 no serial-clock (CLK) pin #6

7) Shop Notes: Flash/EEPROM must be programmed before install.=================================================================


2) TV Failure Symptom: No audio on all inputs




6) Parts Failure Type: Stereo Amp IC502 very warm with dead audio signal output at pins #15 and #22

7) Shop Notes: L510 was tested for proper uH value and re-solder as a service precaution.=================================================================





5) Board Location Number Of Faulty Part(s): F100, Q601, Q602, C608

6) Parts Failure Type: Fuse F100 open, switchers Q601/Q602 shorted, disc capacitor C608 out ofpF value.

7) Shop Notes: n.a.

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1) TV Model Number: 42LG70-UG





6) Parts Failure Type: Switcher Q1 shorted.

7) Shop Notes: Switcher Q3 was replaced as a service precaution.============================================================


2) TV Failure Symptom: Stand-by only, then immediate protect mode



5) Board Location Number Of Faulty Part(s): D507, C509

6) Parts Failure Type: Diode D507 shorted, disc capacitor C509 out of uF value.

7) Shop Notes: n.a.============================================================


2) TV Failure Symptom: Washed out dim picture,




6) Parts Failure Type: Gamma Power Supply IC U12 serial-clock error at pin #15 causing VCOM error.

7) Shop Notes: Be sure to solder thermal pad properly with this IC chip, or it will overheat quickly.

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1) TV Model Number: 42LG7000-ZA





6) Parts Failure Type: Switchers Q6/Q10 both shorted.

7) Shop Notes: n.a.=============================================================


2) TV Failure Symptom: Normal start-up profile, then shut down into protect mode




6) Parts Failure Type: 6 pin dual transistor IC no voltage output at pin #1

7) Shop Notes: SMD R250 out of Ohm value and replaced.==============================================================


2) TV Failure Symptom: Back lights only, then shut down into protect mode





7) Shop Notes: n.a.

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1) TV Model Number: 42LH4000-ZA

2) TV Failure Symptom: No back lights, then shut don into protect mode




6) Parts Failure Type: Fuse F501 open, switchers Q700/Q701 shorted.

7) Shop Notes: n.a.================================================================

1) TV Model Number: 42LH4000-ZA

2) TV Failure Symptom: Turn channel or press volume, TV shuts down into stand-by only


4) Faulty Board Number: EBU60674823


6) Parts Failure Type: Flash/EEPROM IC103 error at serial-data pin #5

7) Shop Notes: Flash/EEPROM must be programmed before install..

================================================================1) TV Model Number: 42LH4000-ZA

2) TV Failure Symptom: Quick power-up logo, then shut down into protect mode



5) Board Location Number Of Faulty Part(s): X101

6) Parts Failure Type: Quartz Crystal X101 no oscillating signal at start-up.

7) Shop Notes: n.a.

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6) Parts Failure Type: Fuse F100 open, switchers Q601/Q602 shorted, disc capacitor C609 shorted.

7) Shop Notes: Disc capacitor C608 was replaced as a service precaution.=================================================================





5) Board Location Number Of Faulty Part(s): F501, ZD503

6) Parts Failure Type: Fuse F501 open, Zener diode D503 shorted.

7) Shop Notes: R503, IC501 were both replaced as a service precaution. Check D606 for leakage.=================================================================





5) Board Location Number Of Faulty Part(s): T703

6) Parts Failure Type: Inverter transformer T703 open at secondary winding.

7) Shop Notes: Inverter transformer T704 replaced as a service precaution.

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1) TV Model Number: 47LD452C-UA




5) Board Location Number Of Faulty Part(s): Q601, R805, IC501

6) Parts Failure Type: Fuse F100 open, switcher Q601 shorted SMD R805 out of Ohm value.

7) Shop Notes: Switching chip IC501 no switching signal to turn on FET gate. R805 under Q601.===================================================================

1) TV Model Number: 47LD452C-UA






7) Shop Notes: B+ Diode D501 and R512 replaced as a service precaution.

===================================================================1) TV Model Number: 47LD452C-UA

2) TV Failure Symptom: Start-up attempt, then shut down into protect mode




6) Parts Failure Type: Opto-Isolator IC502 shorted on diode side.

7) Shop Notes: Opto-Isolator IC503 replaced as a service precaution. Check ESR of E-cap C220.

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1) TV Model Number: 47LF11-UA

2) TV Failure Symptom: Dead, no stand-by




6) Parts Failure Type: Fuse F100 open, diode D600 shorted.

7) Shop Notes: Switcher Q601 replaced as a service precaution.===================================================================





5) Board Location Number Of Faulty Part(s): F100, BD101, CX103

6) Parts Failure Type: Fuse F100 open, bridge rectifier BD101 shorted, box cap CX103 out of uFvalue.

7) Shop Notes: Thermistor TH600 charred and CX102 out of uF value both replaced.====================================================================







7) Shop Notes: IC501 replaced as a service precaution.

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1) TV Model Number: 47LH300C-UA

2) TV Failure Symptom: Stand-by only, no full start-up




6) Parts Failure Type: Flash/EEPROM IC101 dead at serial-clock (SCL) pin #6.

7) Shop Notes: Flash/EEPROM must be programmed before install.==================================================================


2) TV Failure Symptom: TV fully on, with no back lights, then shut down into stand-by only




6) Parts Failure Type: Flash/EEPROM IC101 no serial-data pin #5

7) Shop Notes: Flash/EEPROM must be programmed before install.===================================================================


2) TV Failure Symptom: Bad audio with static snapping sound




6) Parts Failure Type: Stereo Amp chip IC602 very warm and dead signal output at pin #15

7) Shop Notes: L613 tested for proper uH and re-soldered as a service precaution.

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2) TV Failure Symptom: No back light, then shut down into protect mode

3) Faulty Board: LED Driver Board




7) Shop Notes: n.a.==================================================================


2) TV Failure Symptom: Back lights flickering on & off multiple cycles, then shut down into protect mode




6) Parts Failure Type: I2C-Bus LED control chip dead serial-clock (SCL) at pin #26.

7) Shop Notes: U2 has a built-in Flash/EEPROM. U1 was replaced as a service precaution.====================================================================




4) Faulty Board Number: 6871L-2484B


6) Parts Failure Type: SMD MOSFET Q11 shorted.

7) Shop Notes: Q12 was replaced as a service precaution.

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1) TV Model Number: 42LS5700-UA

2) TV Failure Symptom: Back lights on briefly, then shut down into protect mode


4) Faulty Board Number: 55.42T23.D02


6) Parts Failure Type: SMD MOSFET Q204 shorted.

7) Shop Notes: n.a.=================================================================


2) TV Failure Symptom: Normal start-up, brief menu, then shut down into protect mode


4) Faulty Board Number: 6871L-2823E


6) Parts Failure Type: SMD 6 pin transistor Q1 no voltage output pin #1

7) Shop Notes: Q2 replaced as a service precaution.=================================================================


2) TV Failure Symptom: Back light only, no raster, no menu, then shut down into protect mode


4) Faulty Board Number: 6871L-2823E



7) Shop Notes: n.a.

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1) TV Model Number: 42LE5400-UC

2) TV Failure Symptom: TV on, back lights only, then shut down into protect mode


4) Faulty Board Number: 55.42T09.C13


6) Parts Failure Type: Power-Supply IC chip ( for panel) U201 warm and no switching signals at pin #4 and #5.

7) Shop Notes: Check SMD diode D202 for leakage.====================================================================


2) TV Failure Symptom: Stand-by only, relay click once, then prompt protect mode





7) Shop Notes: Diode D503 replaced as a service precaution.=====================================================================






6) Parts Failure Type: Fuse F100 open, switcher Q601 shorted, disc capacitor C609 out of uF value.

7) Shop Notes: Disc capacitor C626 was replaced as a service precaution.

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6) Parts Failure Type: Fuse F100 open, switcher Q601 shorted, disc capacitor C614 out of uF value.

7) Shop Notes: Diode D603 leaky and replaced.===================================================================





5) Board Location Number Of Faulty Part(s): F100, F501, D602, Q601

6) Parts Failure Type: Fuses F100/F501 open, diode D602 shorted, switcher Q601 shorted.

7) Shop Notes: Diode D601 and disc capacitor C614 were replaced as a service precaution.===================================================================


2) TV Failure Symptom: Stan-by only, then immediate protect mode




6) Parts Failure Type: Opto-Isolator IC502 shorted on diode side.

7) Shop Notes: n.a.

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2) TV Failure Symptom: Full power-up, quick menu flicker, then back lights only, then protect mode




6) Parts Failure Type: SMD FET Q12 shorted all junctions (GDS), SMD gate resistor R272 out ofOhm value.

7) Shop Notes: n.a.=====================================================================


2) TV Failure Symptom: TV on, menu scrambled with pattern lines, then shut down into protect mode



5) Board Location Number Of Faulty Part(s):

6) Parts Failure Type: Flash/EEPROM U401 dead serial-data (SDA) pin #5.

7) Shop Notes: Flash/EEPROM must be programmed before install.=====================================================================


2) TV Failure Symptom: TV on, back lights only, then protect mode




6) Parts Failure Type: SMD diode D201 shorted..

7) Shop Notes: Power-supply chip U201 replaced as a service precaution.

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LG LED TV Case history


2) TV Failure Symptom: TV on, brief menu, back lights only, then immediate shut down into protect mode


4) Faulty Board Number: 6871L-2753M


6) Parts Failure Type: 6 pin SMD transistor Q1 no output voltage pin #4

7) Shop Notes: Q2 was replaced as a service precaution.===================================================================


2) TV Failure Symptom: TV on, back lights only, then protect mode


4) Faulty Board Number: 6871L-2753M



7) Shop Notes: n.a.===================================================================


2) TV Failure Symptom: TV start-up then shut down after a few seconds (15sec) into protect mode




6) Parts Failure Type: Buck regulator IC402 no output voltage

7) Shop Notes: n.a.

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6) Parts Failure Type: Fuse F100 open, switcher Q102 shorted, disc cap C119 shorted.

7) Shop Notes: Switcher Q101 and disc cap C118 both replaced as a service precaution.==================================================================





5) Board Location Number Of Faulty Part(s): F100, F101, Q101, Q102, R119, R122

6) Parts Failure Type: Fuses F100/F101 open, switchers Q101/Q102 shorted, SMD resistors R119/R122 open.

7) Shop Notes: Switching chip IC101 and disc cap's C118/C119 all replaced as a service precaution.===================================================================


2) TV Failure Symptom: Stand-by, then immediate protect mode, then fully off



5) Board Location Number Of Faulty Part(s): F501, IC501, R501

6) Parts Failure Type: Fuse F501 open PWM chip IC501 dead at FET voltage pin #1, R501 out ofOhm value.

7) Shop Notes: IC501 internal short, warmer than normal. Components around IC501 tested good.

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1) TV Model Number: 47LN5400-UA

2) TV Failure Symptom: TV full start-up, quick menu flash, then shut down into protect mode




6) Parts Failure Type: 6 pin SMD transistor Q2 no output voltage pin #4

7) Shop Notes: 6 pin Q1 replaced as a service precaution.===================================================================


2) TV Failure Symptom: Must plug TV in to turn on & off.




6) Parts Failure Type: Flash/EEPROM IC104 serial-clock (SCL) error at pin #6.

7) Shop Notes: Flash/EEPROM must be programmed before install.===================================================================


2) TV Failure Symptom: TV start-up, then back lights only, then shut down into protect mode





7) Shop Notes: This TV had other main board LVDS problems. Customer canceled service.

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2) TV Failure Symptom: Stand-by, then immediate protect mode, then fully off




6) Parts Failure Type: Fuse F101 open, diode D101 shorted.

7) Shop Notes: Diode D105 replaced as a service precaution.====================================================================





5) Board Location Number Of Faulty Part(s): F100, Q101, Q102, R115

6) Parts Failure Type: Fuse F100 open, switchers Q101/Q102 shorted, SMD resistor R115 out of Ohm Value.

7) Shop Notes: n.a.====================================================================


2) TV Failure Symptom: Partial start-up then immediate protect mode




6) Parts Failure Type: SMD FET Q805 shorted gate/drain.

7) Shop Notes: n.a.

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1) TV Model Number: 47LW5600-UA

2) TV Failure Symptom: Start-up, brief menu flash, then shut down into protect mode




6) Parts Failure Type: 4 pin SMD FET, no source voltage output.

7) Shop Notes: Q12 FET replaced as a service precaution.====================================================================


2) TV Failure Symptom: Dead, no stand-by power, no relay click



5) Board Location Number Of Faulty Part(s): F100, CX101, Q601, Q602

6) Parts Failure Type: Fuse F100 open, box cap CX101 out of uF value switchers Q601/Q602 shorted.

7) Shop Notes: Disc cap C603 was replaced as a service precaution.====================================================================


2) TV Failure Symptom: Dead, no stand-by power, no relay click




6) Parts Failure Type: Fuse F100 open, switchers Q601/Q602 shorted, disc cap C603 shorted.

7) Shop Notes: Box cap CX101 was replaced as a service precaution.

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1) TV Model Number: 47LN5750-UH

2) TV Failure Symptom: TV start-up, full rater with menu, then shut down into protect mode


4) Faulty Board Number: EBU62184501


6) Parts Failure Type: Buck regulator IC6400 no output voltage, core bias voltage dead.

7) Shop Notes: n.a.==================================================================







7) Shop Notes: D808 replaced as a service precaution.===================================================================


2) TV Failure Symptom: Stan-by, then immediate protect mode




6) Parts Failure Type: Control chip IC801 very warm, no switching output signal. FET gate signal dead.

7) Shop Notes: SMD resistor R806 out of Ohm value and replaced. R806 pin #2 of IC801.

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2) TV Failure Symptom: TV start-up quick raster, then shut down into protect mode





7) Shop Notes: Inductor L3 was tested and re-soldered as a service precaution.

==================================================================1) TV Model Number: 47LN5750-UH

2) TV Failure Symptom: TV full start-up, brief menu flash, then shut down into protect mode




6) Parts Failure Type: 6 pin transistor chip Q1 no output voltage pin #4

7) Shop Notes: Q2 was replaced as a service precaution.===================================================================







7) Shop Notes: n.a.

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1) TV Model Number: 55LB7200-UB




5) Board Location Number Of Faulty Part(s): F100, Q601, R603

6) Parts Failure Type: Fuse F100 open, switcher Q601 shorted, SMD resistor R603 out of Ohm value.

7) Shop Notes: Switcher Q602 replaced as a service precaution. R603 connected to Q601 flip sideof board.=====================================================================





5) Board Location Number Of Faulty Part(s): F100, F101, Q601, Q602, R606

6) Parts Failure Type: Fuses F100/F101 open, switchers Q601/Q602 shorted, SMD resistor R606 open.

7) Shop Notes: n.a.=====================================================================


2) TV Failure Symptom: Stand-by only, will not fully start-up




6) Parts Failure Type: PWM chip IC505 very warm error feedback voltage.

7) Shop Notes: Diode D501 leaky and replaced.

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1) TV Model Number: 55UB8500-UA

2) TV Failure Symptom: Protect mode only, no start-up




6) Parts Failure Type: Secondary fuse F101 open, D501 shorted.

7) Shop Notes: IC501 was replaced as a service precaution.====================================================================





5) Board Location Number Of Faulty Part(s): F100, F101, Q602, Q101, Q102, R124

6) Parts Failure Type: Fuses F100/F101 open, switchers Q602/Q101/Q102 shorted, R124 out of ohm value.

7) Shop Notes: Disc cap C118 out of pF value and replaced.====================================================================







7) Shop Notes: n.a.

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2) TV Failure Symptom: Full start-up, full raster, then back lights only, then shut down into protect mode




6) Parts Failure Type: Synchronous Buck IC U6 no switching signal pin #6. Dead panel voltage.

7) Shop Notes: SMD R354 out of Ohm value and replaced. Inductor L7 replaced as a service precaution.=====================================================================


2) TV Failure Symptom: TV on, menu and picture looks solarized and very dim with bright shadows




6) Parts Failure Type: 6 pin SMD transistor chip Q1 no output voltage at pin #4. Affected Gamma chip U2.

7) Shop Notes: 6 pin transistor Q2 was also placed as a service precaution. Q1 also affected VCOM voltage.=====================================================================


2) TV Failure Symptom: Full start-up then back lights only, then protect mode




6) Parts Failure Type: SMD fuse F1 open, SMD diode D1 shorted.

7) Shop Notes: n.a.

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1) TV Model Number: 55LA6200-UA

2) TV Failure Symptom: Left speaker of headphone's not working




6) Parts Failure Type: Headphone Amp chip IC6100 dead audio signal output at pin #16.

7) Shop Notes: n.a.==================================================================


2) TV Failure Symptom: Full start-up, then after 20 seconds, shut down into protect mode





7) Shop Notes: n.a.===================================================================


2) TV Failure Symptom: Full start-up, after a few seconds shut down into protect mode




6) Parts Failure Type: Buck regulator IC6400 no output voltage.

7) Shop Notes: n.a.

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2) TV Failure Symptom: Distorted picture, then back lights only, then shut down into protect mode


4) Faulty Board Number: 6871L-2979C


6) Parts Failure Type: BIAS VCOM chip U11 dead at Vs voltage for panel power.

7) Shop Notes: U11 was not available. Entire T-Con board replaced.=====================================================================


2) TV Failure Symptom: Back lights only then protect mode


4) Faulty Board Number: 6871L-2979C



7) Shop Notes: n.a.====================================================================


2) TV Failure Symptom: Stan-by, then immediate protect mode



5) Board Location Number Of Faulty Part(s): F101, D105, D101

6) Parts Failure Type: Secondary fuse F101 open diodes D101/D105 shorted.

7) Shop Notes: n.a.

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2) TV Failure Symptom: Stan-by only, no full power up





7) Shop Notes: n.a.

====================================================================1) TV Model Number: 55LA6200-UA






7) Shop Notes: Resistor R502 out of Ohm value and replaced.=====================================================================






6) Parts Failure Type: PWM mode-control chip IC501 very warm with error at feedback pin #4.

7) Shop Notes: Opto-Isolators IC502/IC503 both replaced as a service precaution.

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Sharp LED/LCD Philips Plasma/LCD TV Case History Volume 1

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Transcript of Sharp LED/LCD Philips Plasma/LCD TV Case History Volume 1