R

LCD TVSERVICE MANUAL

CAUTIONBEFORE SERVICING THE CHASSIS,READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : LA73E

MODEL : 42LC7D 42LC7D-UB

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CONTENTS

CONTENTS .............................................................................................. 2

PRODUCT SAFETY ..................................................................................3

SPECIFICATION ........................................................................................6

ADJUSTMENT INSTRUCTION................................................................11

TROUBLE SHOOTING & BLOCK DIAGRAM ........................................17

EXPLODED VIEW .................................................................................. 43

REPLACEMENT PARTS LIST ............................................................... 45

SVC. SHEET ...............................................................................................

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SAFETY PRECAUTIONS

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in theSchematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to preventShock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

General Guidance

An isolation Transformer should always be used during theservicing of a receiver whose chassis is not isolated from the ACpower line. Use a transformer of adequate power rating as thisprotects the technician from accidents resulting in personal injuryfrom electrical shocks.

It will also protect the receiver and it's components from beingdamaged by accidental shorts of the circuitry that may beinadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this TV receiver is blown,replace it with the specified.

When replacing a high wattage resistor (Oxide Metal Film Resistor,over 1W), keep the resistor 10mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Before returning the receiver to the customer,

always perform an AC leakage current check on the exposedmetallic parts of the cabinet, such as antennas, terminals, etc., tobe sure the set is safe to operate without damage of electricalshock.

Leakage Current Cold Check(Antenna Cold Check)With the instrument AC plug removed from AC source, connect anelectrical jumper across the two AC plug prongs. Place the ACswitch in the on position, connect one lead of ohm-meter to the ACplug prongs tied together and touch other ohm-meter lead in turn toeach exposed metallic parts such as antenna terminals, phonejacks, etc. If the exposed metallic part has a return path to the chassis, themeasured resistance should be between 1MΩ and 5.2MΩ. When the exposed metal has no return path to the chassis thereading must be infinite.An other abnormality exists that must be corrected before thereceiver is returned to the customer.

Leakage Current Hot Check (See below Figure) Plug the AC cord directly into the AC outlet.

Do not use a line Isolation Transformer during this check.Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitorbetween a known good earth ground (Water Pipe, Conduit, etc.)and the exposed metallic parts.Measure the AC voltage across the resistor using AC voltmeterwith 1000 ohms/volt or more sensitivity.Reverse plug the AC cord into the AC outlet and repeat AC voltagemeasurements for each exposed metallic part. Any voltagemeasured must not exceed 0.75 volt RMS which is corresponds to0.5mA.In case any measurement is out of the limits specified, there ispossibility of shock hazard and the set must be checked andrepaired before it is returned to the customer.

Leakage Current Hot Check circuit

1.5 Kohm/10W

To Instrument'sexposed METALLIC PARTS

Good Earth Groundsuch as WATER PIPE,CONDUIT etc.

AC Volt-meter

IMPORTANT SAFETY NOTICE

0.15uF

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CAUTION: Before servicing receivers covered by this servicemanual and its supplements and addenda, read and follow theSAFETY PRECAUTIONS on page 3 of this publication.NOTE: If unforeseen circumstances create conflict between thefollowing servicing precautions and any of the safety precautions onpage 3 of this publication, always follow the safety precautions.Remember: Safety First.

General Servicing Precautions1. Always unplug the receiver AC power cord from the AC power

source before;a. Removing or reinstalling any component, circuit board

module or any other receiver assembly.b. Disconnecting or reconnecting any receiver electrical plug or

other electrical connection.c. Connecting a test substitute in parallel with an electrolytic

capacitor in the receiver.CAUTION: A wrong part substitution or incorrect polarityinstallation of electrolytic capacitors may result in anexplosion hazard.

2. Test high voltage only by measuring it with an appropriate highvoltage meter or other voltage measuring device (DVM,FETVOM, etc) equipped with a suitable high voltage probe.Do not test high voltage by "drawing an arc".

3. Do not spray chemicals on or near this receiver or any of itsassemblies.

4. Unless specified otherwise in this service manual, cleanelectrical contacts only by applying the following mixture to thecontacts with a pipe cleaner, cotton-tipped stick or comparablenon-abrasive applicator; 10% (by volume) Acetone and 90% (byvolume) isopropyl alcohol (90%-99% strength)CAUTION: This is a flammable mixture.Unless specified otherwise in this service manual, lubrication ofcontacts in not required.

5. Do not defeat any plug/socket B+ voltage interlocks with whichreceivers covered by this service manual might be equipped.

6. Do not apply AC power to this instrument and/or any of itselectrical assemblies unless all solid-state device heat sinks arecorrectly installed.

7. Always connect the test receiver ground lead to the receiverchassis ground before connecting the test receiver positivelead.Always remove the test receiver ground lead last.

8. Use with this receiver only the test fixtures specified in thisservice manual.CAUTION: Do not connect the test fixture ground strap to anyheat sink in this receiver.

Electrostatically Sensitive (ES) DevicesSome semiconductor (solid-state) devices can be damaged easilyby static electricity. Such components commonly are calledElectrostatically Sensitive (ES) Devices. Examples of typical ESdevices are integrated circuits and some field-effect transistors andsemiconductor "chip" components. The following techniquesshould be used to help reduce the incidence of componentdamage caused by static by static electricity.1. Immediately before handling any semiconductor component or

semiconductor-equipped assembly, drain off any electrostaticcharge on your body by touching a known earth ground.Alternatively, obtain and wear a commercially availabledischarging wrist strap device, which should be removed toprevent potential shock reasons prior to applying power to the

unit under test.2. After removing an electrical assembly equipped with ES

devices, place the assembly on a conductive surface such asaluminum foil, to prevent electrostatic charge buildup orexposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ESdevices.

4. Use only an anti-static type solder removal device. Some solderremoval devices not classified as "anti-static" can generateelectrical charges sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generateelectrical charges sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protectivepackage until immediately before you are ready to install it.(Most replacement ES devices are packaged with leadselectrically shorted together by conductive foam, aluminum foilor comparable conductive material).

7. Immediately before removing the protective material from theleads of a replacement ES device, touch the protective materialto the chassis or circuit assembly into which the device will beinstalled.CAUTION: Be sure no power is applied to the chassis or circuit,and observe all other safety precautions.

8. Minimize bodily motions when handling unpackagedreplacement ES devices. (Otherwise harmless motion such asthe brushing together of your clothes fabric or the lifting of yourfoot from a carpeted floor can generate static electricitysufficient to damage an ES device.)

General Soldering Guidelines1. Use a grounded-tip, low-wattage soldering iron and appropriate

tip size and shape that will maintain tip temperature within therange or 500 F to 600 F.

2. Use an appropriate gauge of RMA resin-core solder composedof 60 parts tin/40 parts lead.

3. Keep the soldering iron tip clean and well tinned.4. Thoroughly clean the surfaces to be soldered. Use a mall wire-

bristle (0.5 inch, or 1.25cm) brush with a metal handle.Do not use freon-propelled spray-on cleaners.

5. Use the following unsoldering techniquea. Allow the soldering iron tip to reach normal temperature.

(500 F to 600 F)b. Heat the component lead until the solder melts.c. Quickly draw the melted solder with an anti-static, suction-

type solder removal device or with solder braid.CAUTION: Work quickly to avoid overheating thecircuitboard printed foil.

6. Use the following soldering technique.a. Allow the soldering iron tip to reach a normal temperature

(500 F to 600 F)b. First, hold the soldering iron tip and solder the strand against

the component lead until the solder melts.c. Quickly move the soldering iron tip to the junction of the

component lead and the printed circuit foil, and hold it thereonly until the solder flows onto and around both thecomponent lead and the foil.CAUTION: Work quickly to avoid overheating the circuitboard printed foil.

d. Closely inspect the solder area and remove any excess orsplashed solder with a small wire-bristle brush.

SERVICING PRECAUTIONS

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IC Remove/ReplacementSome chassis circuit boards have slotted holes (oblong) throughwhich the IC leads are inserted and then bent flat against thecircuit foil. When holes are the slotted type, the following techniqueshould be used to remove and replace the IC. When working withboards using the familiar round hole, use the standard techniqueas outlined in paragraphs 5 and 6 above.

Removal1. Desolder and straighten each IC lead in one operation by gently

prying up on the lead with the soldering iron tip as the soldermelts.

2. Draw away the melted solder with an anti-static suction-typesolder removal device (or with solder braid) before removing theIC.

Replacement1. Carefully insert the replacement IC in the circuit board.2. Carefully bend each IC lead against the circuit foil pad and

solder it.3. Clean the soldered areas with a small wire-bristle brush.

(It is not necessary to reapply acrylic coating to the areas).

"Small-Signal" Discrete TransistorRemoval/Replacement1. Remove the defective transistor by clipping its leads as close as

possible to the component body.2. Bend into a "U" shape the end of each of three leads remaining

on the circuit board.3. Bend into a "U" shape the replacement transistor leads.4. Connect the replacement transistor leads to the corresponding

leads extending from the circuit board and crimp the "U" withlong nose pliers to insure metal to metal contact then soldereach connection.

Power Output, Transistor DeviceRemoval/Replacement1. Heat and remove all solder from around the transistor leads.2. Remove the heat sink mounting screw (if so equipped).3. Carefully remove the transistor from the heat sink of the circuit

board.4. Insert new transistor in the circuit board.5. Solder each transistor lead, and clip off excess lead.6. Replace heat sink.

Diode Removal/Replacement1. Remove defective diode by clipping its leads as close as

possible to diode body.2. Bend the two remaining leads perpendicular y to the circuit

board.3. Observing diode polarity, wrap each lead of the new diode

around the corresponding lead on the circuit board.4. Securely crimp each connection and solder it.5. Inspect (on the circuit board copper side) the solder joints of

the two "original" leads. If they are not shiny, reheat them and ifnecessary, apply additional solder.

Fuse and Conventional ResistorRemoval/Replacement1. Clip each fuse or resistor lead at top of the circuit board hollow

stake.2. Securely crimp the leads of replacement component around

notch at stake top.3. Solder the connections.

CAUTION: Maintain original spacing between the replacedcomponent and adjacent components and the circuit board toprevent excessive component temperatures.

Circuit Board Foil RepairExcessive heat applied to the copper foil of any printed circuitboard will weaken the adhesive that bonds the foil to the circuitboard causing the foil to separate from or "lift-off" the board. Thefollowing guidelines and procedures should be followed wheneverthis condition is encountered.

At IC ConnectionsTo repair a defective copper pattern at IC connections use thefollowing procedure to install a jumper wire on the copper patternside of the circuit board. (Use this technique only on ICconnections).

1. Carefully remove the damaged copper pattern with a sharpknife. (Remove only as much copper as absolutely necessary).

2. carefully scratch away the solder resist and acrylic coating (ifused) from the end of the remaining copper pattern.

3. Bend a small "U" in one end of a small gauge jumper wire andcarefully crimp it around the IC pin. Solder the IC connection.

4. Route the jumper wire along the path of the out-away copperpattern and let it overlap the previously scraped end of the goodcopper pattern. Solder the overlapped area and clip off anyexcess jumper wire.

At Other ConnectionsUse the following technique to repair the defective copper patternat connections other than IC Pins. This technique involves theinstallation of a jumper wire on the component side of the circuitboard.

1. Remove the defective copper pattern with a sharp knife.Remove at least 1/4 inch of copper, to ensure that a hazardouscondition will not exist if the jumper wire opens.

2. Trace along the copper pattern from both sides of the patternbreak and locate the nearest component that is directlyconnected to the affected copper pattern.

3. Connect insulated 20-gauge jumper wire from the lead of thenearest component on one side of the pattern break to the leadof the nearest component on the other side.Carefully crimp and solder the connections.CAUTION: Be sure the insulated jumper wire is dressed so theit does not touch components or sharp edges.

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SPECIFICATIONNOTE : Specifications and others are subject to change without notice for improvement.

4. General Specification(TV)

No. Item Specification Remark

1. Receiving System ATSC/64 & 256 QAM/ NTSC-M

2. Available Channel 1) VHF : 02~13

2) UHF : 14~69

3) DTV : 02-69

4) CATV : 01~135

5) CADTV : 01~135

3. Input Voltage 1) AC 100 ~ 240V 50/60Hz

4. Market NORTH AMERICA

5. Screen Size 26 inch Wide – 26 inches(582.96mm) For 26LC7D-UB

32 inch Wide - 31.51inches(800.4mm) For 32LC7D-UB,32LC4D-UA

37 inch Wide – 32.02 inches(940.3mm) For 37LC7D-UB

42 inch Wide – 42.02 inches(1067.308mm) For 42LC7D-UB,42LC4D-UA

6. Aspect Ratio 16:9

7. Tuning System FS

8. LCD Module T260XW02-V5 For 26LC7D-UE

LC320WX4-SLA1 For 32LC7D-UB,32LC4D-UA

LC370WX3-SLA1 For 37LC7D-UB

LC420WX6-SLA1 For 42LC7D-UB,42LC4D-UA

9. Operating Environment 1) Temp : 0 ~ 40 deg

2) Humidity : ~ 80 %

10. Storage Environment 1) Temp : -20 ~ 60 deg

2) Humidity : 0 ~ 90 %

1. Application Range. This spec sheet is applied to the 37"/42" LCD TV used LA73Echassis.

2. Especificación Each part is tested as below without special appointment

2.1 Temperature : 20 ±5°C 2.2 Relative Humidity : 65 ±10% 2.3 Power Voltage : Standard input voltage

(100~240V@ 50/60Hz) • Standard Voltage of each products is marked by models

2.4 Specification and performance of each parts are followedeach drawing and specif ication by part number inaccordance with BOM .

2.5 The receiver must be operated for about 20 minutes priorto the adjustment.

3. Test method

3.1 Performance : LGE TV test method followed.3.2 Demanded other specification

Safety : UL, CSA, IEC specification3.3 EMC : FCC, ICES, IEC specification

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5. Chroma & Brightness5-1. 37LC7D-UB

CONDITION : EZ-Picture "Daylight"

5-2. 42LC7D-UB, 42LC4D-UACONDITION : EZ-Picture "Daylight"

No Item Min Typ Max Unit Remark

1. White peak brightness 360 450 cd/m2 HDMI input, full white,

Video Black level=High

2. Contrast ratio 700:1 900:1 Non dimming mode

(PC Mode)

3000:1 4000:1 5000:1 Dimming mode

1. Input full black, wait 10 minute,

measure black level

2. Input full white , wait 10 minute,

measure white level

3. Brightness uniformity 1.3 Refer to LCD SPEC.

4. Color coordinate RED X 0.633 +/- 0.03

Y 0.339 +/- 0.03

GREEN X 0.286 +/- 0.03

Y 0.610 +/- 0.03

BLUE X 0.147 +/- 0.03

Y 0.065 +/- 0.03

WHITE X 0.276 +/- 0.03

Y 0.283 +/- 0.03

5. Viewing angle 178 R/L, U/D

6. Color Temperature Standard 8,300 9,300 10,300 <Test Signal>

Cool 10,000 11,000 12,000 HDMI input, With 16-gray pattern

Warm 5,500 6,500 7,500 6th bar from right

No Item Min Typ Max Unit Remark

1. White peak brightness 360 450 cd/m2 HDMI input, full white,

Video Black level=High

2. Contrast ratio 800:1 1000:1 Non dimming mode

(PC Mode)

3000:1 4000:1 5000:1 Dimming mode

1. Input full black, wait 10 minute,

measure black level

2. Input full white , wait 10 minute,

measure white level

3. Brightness uniformity 1.3 Refer to LCD SPEC.

4. Color coordinate RED X 0.633 +/- 0.03

Y 0.339 +/- 0.03

GREEN X 0.286 +/- 0.03

Y 0.610 +/- 0.03

BLUE X 0.147 +/- 0.03

Y 0.065 +/- 0.03

WHITE X 0.276 +/- 0.03

Y 0.283 +/- 0.03

5. Viewing angle 178 R/L, U/D

6. Color Temperature Standard 8,300 9,300 10,300 <Test Signal>

Cool 10,000 11,000 12,000 HDMI input,

Warm 5,500 6,500 7,500 Daylight/Cool 85 IRE

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6. Component Video Input (Y, PB, PR)

No.Specification

RemarkResolution H-freq(kHz) V-freq(Hz)

1. 720*480 15.73 59.94 SDTV ,DVD 480I

2. 720*480 15.73 60.00 SDTV ,DVD 480I

3. 720*480 31.47 59.94 SDTV 480P

4. 720*480 31.50 60.00 SDTV 480P

5. 1280*720 44.96 59.94 HDTV 720P

6. 1280*720 45.00 60.00 HDTV 720P

7. 1920*1080 33.72 59.94 HDTV 1080I

8. 1920*1080 33.75 60.00 HDTV 1080I

9. 1920*1080 27 24 HDTV 1080P

10. 1920*1080 33.75 30 HDTV 1080P

No.Specification

RemarkResolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz)

PC DDC

1. 640*350 31.469 70.08 25.17 DOS

2. 720*400 31.469 70.08 28.32 DOS O

3. 640*480 31.469 59.94 25.17 VESA(VGA) O

4. 800*600 37.879 60.31 40.00 VESA(SVGA) O

5. 1024*768 48.363 60.00 65.00 VESA(XGA) O

6. 1280*768 47.776 59.87 79.50 CVT(WXGA) O

7. 1360*768 47.720 59.799 84.75 CVT(WXGA) O

8. 1366*768 47.13 59.65 72

7. RGB PC - RGB PC INPUT Mode Table

- HDMI INPUT(PC/DTV)

No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Remark

PC DDC

1. 640*480 31.469 59.94 25.17 VESA(VGA) O

2. 800*600 37.879 60.31 40.00 VESA(SVGA) O

3. 1024*768 48.363 60.00 65.00 VESA(XGA) O

4. 1280*768 47.776 59.87 79.50 CVT(WXGA) O

5. 1360*768 47.720 59.799 84.75 CVT(WXGA) O

6. 1366*768 47.13 59.65 72

DTV

7. 720*480 31.469 59.94 27.00 SDTV 480P

8. 720*480 31.500 60.00 27.03 SDTV 480P

9. 1280*720 44.96 59.94 74.17 HDTV 720P

10. 1280*720 45.00 60.00 74.25 HDTV 720P

11. 1920*1080 33.72 59.94 74.17 HDTV 1080I

12. 1920*1080 33.75 60.00 74.25 HDTV 1080I

13. 1920*1080 27 24.00 74.25 HDTV 1080P

14. 1920*1080 33.75 30.00 74.25 HDTV 1080P

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8. Mechanical specification 1) 37LC7D

No. Item Content Unit Remark

1. Product Widt(W) Length(D) Height(H) mm

Dimension Before Packing 927 280.5 692.8 mm With Stant

After Packing 999 264 874 mm

2. Product Only SET 20 Kg

With BOX 25 Kg

2) 42LC7D

No. Item Content Unit Remark

1. Product Widt(W) Length(D) Height(H) mm

Dimension Before Packing 1033.4 287.6 750 mm With Stant

After Packing 1119 374 858 mm

2. Product Only SET 24.9 Kg

With BOX 30.4 Kg

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9. Customer Menu Setup (Shipment Condition)

No Item Condition Remark

1. Input Mode TV02CH

2. Volume Level 30

3. Mute Off

4. Aspect Ratio 16:9

5. Video EZ Picture Daylight

Contrast 100

Brightness 40

Color 70

Sharpness 70

Tint 0

Color-temperature Cool

XD Auto(On)

Advanced Cinema3:2 Mode(Off)

Black Level(RF,HDMI=>Low),(AV=>High)( RGB-PC,Component=>Disable)

6. Audio Audio Language Off

EZ Sound Normal

Balance 0

Bass 50

Front Surround Off

TV Speaker On

7. Timer Auto clock Off

Manual Clock Off

Off Timer Off

On Timer Off

Sleep Timer Off

Auto Off Off

8. Option Aspect Ratio 16:9

Caption/Text Off

Caption Option Set By Program

Language English

Simplink On

9. Lock Lock System Off

Set password On (Default:0000)

Block channel None

Movie Rating Off

TV Rating-Children None

TV Rating-General None

Input Block Off

10. Channel Memory RF : 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 30, 51, 63

CATV : 15, 16, 17

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ADJUSTMENT INSTRUCTION

1. Application ObjectThese instructions are applied to all of the LCD TV, LA73E.

2. Notes(1) Because this is not a hot chassis, it is not necessary to use

an isolation transformer. However, the use of isolationtransformer will help protect test equipment.

(2) Adjustments must be done in the correct order.(3) The adjustments must be performed in the circumstance of

20±5°C of temperature and 65±10% of relative humidity ifthere is no specific designation.

(4) The input voltage of the receiver be must kept 110V, 60Hzwhen adjusting.

(5) The receiver must be operational for about 15 minutesprior to the adjustments.

Perform preliminary operation after receiving 100% White

Pattern (06CH).

(Or 3. White Pattern status of Ez-Adjust)

White Pattern entry method

A) Enter into Ez-Adjust by pressing the ADJ key on the

adjustment R/C.

B) 100% FULL WHITE PATTERN appears if pressing the

OK ( ) key after selecting the 3.WHITE PATTERN with

the CH + / - KEY.

* It is possible to heat run the set without a separatesignal generator in this mode.

Caution : Care must be taken as afterimagephenomena may occur about the black level part ofscreen If leaving pause image turned on for morethan 20 minutes (especially inner digital pattern (13CH), Cross Hatch Pattern (09CH) with significantblack/white contrast).

3. MICOM Download(Option)

3-1. Required Test Equipment(1) JIG-LEVER TYPE for adjusting: 1EA(2) PC & MONITOR: 2EA(3) BOARD for INTERFACE: IIC & ISP BOARD: 2EA(4) 15P D-SUB CABLE: 2EA(5) Using the 12/15 line of D-SUB 15P

12-SDA/15-SCL

3-2. JIG Connection

3-3. Establishment Program(1) Establish LGE Monitor Tools v1.1(2) The program work and it is opened program window as

seen below.

connect ion to PC

connect ion to PC

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(3) Click the first icon shown in fig.9. The window seen infig.10 should appear.

3-4. Set Method(1) MCU Select: MTV512M64(2) Option

R/W Option: Auto Write(Verity)Jig Option: MysonTransmit Speed: Medium

(3) Check: Just do it with blank micom.(4) PORT

Chose Parallel Port (normal LPT1)Attention: You must chose EPP when select Rom BIAS atLPT

3-5. Download Method(1) Click the Load File.

(2) Locate and select the correct file from your computer.(*.hex).

(3) Click the Send.

(4) When you see (ISP COMPLETE) the download iscomplete.

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6. ADC-Set Adjustment

6-1. SynopsisADC-Set adjustment to set the black level and the Gain tooptimum.

6-2. Test Equipment Service R/C, 801GF(802V, 802F, 802R) or MSPG925FAPattern Generator(480i/1080i The Horizontal 100% Color Bar Pattern adjust towithin 0.7±0.1Vp-p)

[ADC adjustment (MSPG-925Fx series) Model No. & Pattern No.]- Model No.: #209(480i adjustment), #223(1080i adjustment)- Pattern No.: #65(7ColorBar Pattern)

6-3. Adjustment(1) Select Component1 as the input with 100% Horizontal

Color Bar Pattern(HozTV31Bar) in 480i Mode(2) After receiving signal for at least 1 second, press the ADJ

Key on the Service R/C to enter the ‘Ez - Adjust’ and selectthe ‘2. ADC 480i Comp1’.Pressing the Enter Key to adjust automatically.

(3) When the adjustment is over, 'MST3361 ComponentSuccess’ is displayed. If the adjustment has errors,'MST3361 Configuration Error’ is displayed.

(4) Select Component1 as the input with 100% HorizontalColor Bar Pattern(HozTV31Bar) in 1080i Mode.

(5) After receiving signal for at least 1 second, press the ADJKey on the Service R/C to enter the ‘Ez - Adjust’ and selectthe ‘3. ADC 1080i Comp1/RGB’.Pressing the Enter Key to adjust automatically.

(6) When the adjustment is over, 'MST3361 ComponentSuccess’ is displayed. If the adjustment has errors,'MST3361 Configuration Error’ is displayed.

(7) After the Component MST3361 adjustment is over, convertthe RGB-DTV Mode and display Pattern. When the adjustment is over, 'MST3361 RGB_DTVSuccess’ is displayed.

(8) Readjust after confirming the case Pattern or adjustmentcondition where the adjustment errors.

(9) After adjustment is complete, exit the adjustment mode bypressing the ADJ KEY.

<Fig. 2> Adjustment Mode

<Fig. 3> Adjustment Pattern: 480i/1080i 60Hz HozTV30 BarPattern

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7. EDID(The Extended Display Identification Data)/DDC(Display Data Channel) Download

This is the function that enables “Plug and Play".

7-1. HDMI EDID Data Input

(1) Required Test Equipment1) PC, Jig for adjusting DDC. (PC serial to D-sub

Connection equipment)2) S/W for writing DDC(EDID data write & read)3) D-Sub cable4) Jig for HDMI Cable connection

(2) Preparation for Adjustments & Setting of Device

1) Set devices as below and turn on the PC and JIG.2) Open S/W for writing DDC (EDID data write & read).

(operated in DOS mode)

7-2. EDID DATA for LA73E

:EDID for HDMI-1 (DDC (Display Data Channel) Data)EDID Block 0 table =

EDID Block 1 table =

:EDID for HDMI-2 (DDC (Display Data Channel) Data)EDID Block 0 table =

EDID Block 1 table =

:EDID for RGB-PCEDID Block 0 table =

0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 10 | 00 11 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23 20 | 09 48 4C 2F CE 00 31 40 45 40 61 40 01 01 01 01 30 | 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70 40 | 36 00 C4 8E 21 00 00 1E 0E 1F 00 80 51 00 1E 30 50 | 40 80 37 00 C4 8E 21 00 00 1C 00 00 00 FD 00 38 60 | 4B 1F 3C 09 00 0A 20 20 20 20 20 20 00 00 00 FC 70 | 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 98

0 | 02 03 16 F1 46 84 05 03 02 20 22 23 15 07 50 66 10 | 03 0C 00 10 00 80 01 1D 00 72 51 D0 1E 20 6E 28 20 | 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16 20 30 | 58 2C 25 00 C4 8E 21 00 00 9E 8C 0A D0 8A 20 E0 40 | 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C 0A D0 8A 50 | 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00 18 00 00 60 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 70 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 25

0 | 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 10 | 00 11 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23 20 | 09 48 4C 2F CE 00 31 40 45 40 61 40 01 01 01 01 30 | 01 01 01 01 01 01 01 1D 00 72 51 D0 1E 20 6E 28 40 | 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16 20 50 | 58 2C 25 00 C4 8E 21 00 00 9E 00 00 00 FC 00 4C 60 | 47 20 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD 70 | 00 38 4B 1F 3C 09 00 0A 20 20 20 20 20 20 01 66

0 | 02 03 16 F1 46 84 05 03 02 20 22 23 15 07 50 66 10 | 03 0C 00 20 00 80 8C 0A D0 8A 20 E0 2D 10 10 3E 20 | 96 00 C4 8E 21 00 00 18 8C 0A D0 8A 20 E0 2D 10 30 | 10 3E 96 00 13 8E 21 00 00 18 00 00 00 00 00 00 40 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 50 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 60 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 70 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 B3

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LCD TV SET(or Digital Board)

- 15 -

8. Adjustment of White Balance

8-1. The Purpose and Principal of Color Temperature Adjustment

(1) Purpose: to reduce the difference in color temperatureamong modules

(2) Principal: A module is in full dynamic range when RGBGain on OSD is 192. To adjust the white balance withoutcausing full dynamic range and full data, fix one of RGBGains at 192 and control the other two by reducing themfrom 192.

8-2. Required Equipment(1) Color Analyzer : CA-110 or CA-210

(2) Automatic adjustor (with automatic adjustment necessityand the RS-232C communication being possible)

8-3. Connection Diagram of Equipment for Measuring (Automatic Adjustment)

Use the internal pattern to adjust White Balance. The patternis automatically given when the automatic adjustment deviceis connected or when a user presses ADJ on the remotecontroller to start Ez Adjust and then selects 6.White-Balance.

[ Requirements for Automatic Adjustment

(1) The illuminance of surroundings10 lux or less; preventing light in surroundings as much aspossible

(2) The location of the Probe1) For PDP: place the color analyzer (CA-110, CA-210)

close to the surface of a module and start theadjustment.

2) For LCD: place the color analyzer (CA-110, CA-210)close to the surface of a module within 10 cm and keepthe probe of the color analyzer at 80° to 100° angle fromthe surface of a module.

(3) Aging time1) Once Aging is started, keep the power on without power

supply interruption for at least 15 minutes for heat run.2) For PDP, use the internal pattern to adjust White

Pattern.3) For LCD, use NO SIGNAL or Full White Pattern to

ensure the backlight is turned on.

8-4. Adjustment of White Balance(Automatic Adjustment)

(1) Turn on the POWER ON( ) of the remote controller to setthe adjustment and then start the automatic adjustment orset the Baud Rate to 115200.Â) of the remote controller to

(2) Start the adjustment from “wb 00 00” and complete it at“wb 00 ff”. (Adjust the offset if necessary)

wb 00 00 the automatic adjustment of White Balance isstarted.wb 00 10 adjusting gain (internal pattern appears) isstarted.ja 00 ff adjusting datajb 00 c0...wb 00 1f adjusting gain is completed.Adjust the offset (from wb 00 20 to wb 00 2f) if necessary.wb 00 ff the automatic adjustment of White Balance(internal pattern disappears) is completed.

C A -100+

C O L O R

A N A L Y Z E R

T Y PE ; C A -100+

F u l l W h i t e Pat t er n

R S-232C

Connection Diagram of Automatic Adjustment

- 16 -

[[ RS-232C Command (Automatic Adjustment)

LA73E Chassis Model All]

8-5. Adjustment of White Balance(Manual Adjustment)

Required Equipment : CA-210

(1) Enter ‘Ez - Adjust’ by pressing ADJ KEY on the ServiceRemote Control.

(2) Select "9. TEST PATTERN" using CH +/- Key and HEATRUN at least 30 minutes by pressing the ENTER Key.

(3) Zero Calibrate of the Color Analyzer, then attach sensor toLCD module surface when you adjust.

(4) Select ‘6. White-Balance’ of ‘Ez - Adjust’ by pressing theADJ KEY on the Service R/C. Then enter adjustment modeby pressing the Right KEY (G ) .(The internal pattern of full white appears by pressing G )

(5) The adjustment is conducted in three levels of colortemperature; COOL, MEDIUM, and WARM.

[ Color temperature: Cool, Medium, Warm

(1) When R Gain is fixed at 192,Control G Gain and B Gain by reducing them from 192.

(2) When B Gain is fixed at 192,Control R Gain and G Gain by reducing them from 192.

(3) When G Gain is fixed to 192,Control R Gain and B Gain by reducing them from 192.

Fix one of three Gains (R Gain, G Gain, and B Gain) at 192and control the other two by reducing values from 192 toprevent it from increasing.

(When RGB Gains are all 192, the module is in full dynamicrange.)

R Gain

G Gain

B Gain

R Cut

G Cut

B Cut

jg

jh

ji

Cool

ja

jb

jc

Mid

RS-232C COMMAND

[CMD ID DATA]

CENTER

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jd

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00

00

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192

192

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Min

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(Deci

mal)

64

64

64

Cool

64

64

64

Mid

64

64

64

Warm

9. USB S/W Download (Option)

9-1. OverviewUSB Download enables quick response to S/W upgradingand helps to configure the panel to the latest updates.

9-2. How to Download(1) Before starting USB download, ensure that the power is

turned off and the display is turned on.(2) Once the USB memory stick containing the upgraded file

is connected to the USB port on the main board, thefollowing picture appears on the screen.

(3) Check the current version at [Current TV Software VersionInformation] and the target version at [New Found TVSoftware Version Information]. Press Enter on the remotecontroller to confirm the upgrade.

(4) The following picture shows the downloading in progress.Once the download is completed, the power isautomatically turned on and off. (Otherwise, please turnthe power on and off)

(5) Once the download is completed, remove the USBmemory stick from the USB port. Press IN-START on theremote controller to check the upgraded S/W version atthe top of the screen while the display is turned on.

Do not plug off.

Press EXIT to cancel the upgrade.

<S/W Upgrade Screen>

The software upgrade is now in progress.

Until the whole process if completed, please.

- Do not remove the memory card from the slot.

- Do not plug off.

Reading the file---Done

Upgrading---Done

The TV will restart automatically in 0 seconds.

<Downloading in progress Screen>

- 17 -

NoRGB DTV

YesAdaptive Picture Mode

¥Audio Output 10W*2¥Freeze NoOthers

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Yes(2D)Enhanced Noise Reduction

USE scalier On/Off OSD MenuYesXD Engine

Use Brief InfoO(PSIP)Program Guide Type

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t w

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orm

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t da

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t sig

nal

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easu

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ata

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mpl

itude

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oint

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CM

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t pin

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ideo

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t lev

el fo

r S

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nt o

f B

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ain

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ure

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ain

feat

ure

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r sy

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ithFr

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phic

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and

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I

DA

C3

DA

C2

DA

C1

DA

C0

- 37 -

- E

xpla

natio

n

Mpe

g Fe

eder

And

Vid

eo F

eede

r (M

FD a

nd V

FD)

-Mpe

g Fe

eder

is a

dat

a pa

th o

f VS

B o

r QA

M d

ecod

ed s

igna

l. Th

ese

sign

als

go to

the

Min

itita

nof

BC

M35

50.

-In th

e m

initi

tan

bloc

k do

pro

cess

ing

the

MP

EG

and

vid

eo.

VD

EC

( V

ideo

Dis

play

Dec

oder

)

-Thi

s bl

ock

has

seve

ral d

etai

led

bloc

k. It

can

han

dle

the

inpu

t com

posi

te s

igna

l fo

r exa

mpl

e, Y

/C s

epar

atio

n,co

lor d

ecod

ing,

aut

o ga

in c

ontro

l, et

c.

AFE

AFE

Fron

tEn

dFr

ont

End

Y/C

Sepa

ratio

nY/

CSe

para

tion

Chr

oma

Dem

oC

hrom

aD

emo

Bac

kEn

dB

ack

End

VDEC

Det

ail B

lock

BVB

Inte

rfac

eB

VBIn

terf

ace

Dig

ital I

nput

-Dig

ital i

nput

can

han

dle

digi

tal v

ideo

sig

nal.

In o

ur s

yste

m th

roug

h th

is p

ath,

com

pone

nt,R

GB

PC, H

DM

I/DVI

sig

nals

are

deco

ded.

So

this

pat

h is

ver

y im

porta

nt b

lock

in o

ur s

yste

m.

Expl

anat

ion

- 38 -

- T

V/C

AT

V d

oesn

't di

spla

y

Che

ck T

U40

01 P

in9(

Vide

o ou

tput

)C

an y

ou s

ee th

e no

rmal

sig

nal?

Che

ck th

e in

put(P

in63

) of A

V sw

itch(

IC50

03).

Can

you

see

the

norm

al w

avef

orm

?

Che

ck th

e ou

tput

(Pin

56) o

f AV

switc

h(IC

5003

).C

an y

ou s

ee th

e no

rmal

wav

efor

m?

Che

ck th

e in

put(P

in1)

of L

PF(IC

4006

).C

an y

ou s

ee th

e no

rmal

wav

efor

m?

YES YE

S

YES

NO

Cou

ld y

ou m

easu

re v

olta

ge o

f TU

4001

&

IIC li

nes?

Are

they

all

norm

al?

Che

ck th

e ou

tput

(Pin

8) o

f LPF

(IC40

06).

Can

you

see

the

norm

al w

avef

orm

?

YES

Che

ck th

e in

put(P

inH

26) o

f B

CM

3550

(IC40

06).

Mea

sure

wav

efor

m a

t C10

10 b

ecau

se it

s

mor

e ea

sy to

che

ck.

Can

you

see

the

norm

al w

avef

orm

?

YES

NO

You

shou

ld c

heck

pow

er li

ne

& II

C li

nes.

YES

You

shou

ld re

plac

e TU

NER

.

NO

Afte

r che

ckin

g th

e Po

wer

of A

V sw

itch

you

shou

ld d

ecid

e to

repl

ace

AV

switc

h or

not

.

NO

Afte

r che

ckin

g th

e Po

wer

of A

V sw

itch

you

shou

ld d

ecid

e to

repl

ace

AV

switc

h or

not

.

NO

Afte

r che

ckin

g th

e Po

wer

of L

PF y

ou s

houl

d de

cide

to re

plac

e LP

F o

r not

.

NO

Afte

r che

ckin

g th

e Po

wer

of L

PF y

ou s

houl

d de

cide

to re

plac

e LP

F o

r not

.

YEX

This

boa

rd h

as b

ig p

robl

em b

ecau

se M

ain

chip

(BC

M35

50) h

ave

som

e tr

oubl

es.

Afte

r che

ckin

g th

orou

ghly

all

path

onc

e ag

ain,

Yo

u sh

ould

dec

ide

to re

plac

e B

CM

3550

or n

ot.

- 39 -

- V

ideo

doe

sn't

disp

lay

Che

ck J

5007

Pin

3CC

an y

ou s

ee th

e no

rmal

wav

efor

m?

Che

ck th

e in

put(P

in1

or P

in8)

of A

V sw

itch(

IC50

03).

Pin1

is fo

r vid

eo1,

Pin8

is

for v

ideo

2.

Can

you

see

the

norm

al w

avef

orm

?

Che

ck th

e ou

tput

(Pin

56) o

f AV

switc

h(IC

5003

).C

an y

ou s

ee th

e no

rmal

wav

efor

m?

Che

ck th

e in

put(P

in1)

of L

PF(IC

4006

).C

an y

ou s

ee th

e no

rmal

wav

efor

m?

YES YE

S

YES

NO

J500

7 m

ay h

ave

prob

lem

. Rep

lace

this

Ja

ck.

Che

ck th

e ou

tput

(Pin

8) o

f LPF

(IC40

06).

Can

you

see

the

norm

al w

avef

orm

?

YES

Che

ck th

e in

put(P

inH

26) o

f B

CM

3550

(IC40

06).

Mea

sure

wav

efor

m a

t C10

10 b

ecau

se it

s

mor

e ea

sy to

che

ck.

Can

you

see

the

norm

al w

avef

orm

?

YES

NO

Afte

r che

ckin

g th

e Po

wer

of A

V sw

itch

you

shou

ld d

ecid

e to

repl

ace

AV

switc

h or

not

.

NO

Afte

r che

ckin

g th

e Po

wer

of A

V sw

itch

you

shou

ld d

ecid

e to

repl

ace

AV

switc

h or

not

.

NO

Afte

r che

ckin

g th

e Po

wer

of L

PF y

ou s

houl

d de

cide

to re

plac

e LP

F o

r not

.

NO

Afte

r che

ckin

g th

e Po

wer

of L

PF y

ou s

houl

d de

cide

to re

plac

e LP

F o

r not

.

YEX

This

boa

rd h

as b

ig p

robl

em b

ecau

se M

ain

chip

(BC

M35

50) h

ave

som

e tr

oubl

es.

Afte

r che

ckin

g th

orou

ghly

all

path

onc

e ag

ain,

Yo

u sh

ould

dec

ide

to re

plac

e B

CM

3550

or n

ot.

- 40 -

- C

ompo

nent

doe

sn't

disp

lay

Che

ck J

5004

,J50

05.

Can

you

see

the

norm

al w

avef

orm

?

Che

ck th

e in

put o

f Com

pone

nt

switc

h(IC

5001

,IC50

02).

Can

you

see

the

norm

al w

avef

orm

?

Che

ck th

e ou

tput

of C

ompo

nent

sw

itch(

IC50

01,IC

5002

). C

an y

ou s

ee th

e no

rmal

wav

efor

m?

Che

ck th

e in

put o

f MST

3361

(IC70

04

Pin4

1,44

,46)

.C

an y

ou s

ee th

e no

rmal

wav

efor

m?

YES YE

S

YES

NO

J500

4,J5

005

may

hav

e pr

oble

m. R

epla

ce th

is

Jack

.

Che

ck th

e ou

tput

of M

ST33

61(IC

7004

).C

an y

ou s

ee th

e no

rmal

wav

efor

m?

YES

Che

ck th

e in

put a

nd o

utpu

t of

BC

M35

50(IC

4006

). Es

peci

ally

you

sho

uld

chec

kTh

e H

,V s

ync

and

cloc

k.C

an y

ou s

ee th

e no

rmal

wav

efor

m?

YES

NO

Afte

r che

ckin

g th

e in

put T

R o

f com

pone

nt, y

ou

shou

ld d

ecid

e to

repl

ace

com

pone

nt s

witc

h or

no

t.

NO

NO

Afte

r che

ckin

g th

e Po

wer

of M

ST33

61 y

ou

shou

ld d

ecid

e to

repl

ace

MST

3361

or n

ot.

NO

YEX

This

boa

rd h

as b

ig p

robl

em b

ecau

se M

ain

chip

(BC

M35

50) h

ave

som

e tr

oubl

es.

Afte

r che

ckin

g th

orou

ghly

all

path

onc

e ag

ain,

Yo

u sh

ould

dec

ide

to re

plac

e B

CM

3550

or n

ot.

Afte

r che

ckin

g th

e Po

wer

of c

ompo

nent

sw

itch

you

shou

ld d

ecid

e to

repl

ace

com

pone

nt s

witc

h or

not

.

Afte

r che

ckin

g th

e Po

wer

of M

ST33

61 y

ou

shou

ld d

ecid

e to

repl

ace

MST

3361

or n

ot.

- 41 -

- R

GB

_PC

doe

sn't

disp

lay

Che

ck in

put c

onne

ct P

7004

.C

an y

ou s

ee th

e no

rmal

wav

efor

m?

Che

ck th

e in

put o

f Com

pone

nt

switc

h(IC

5002

). C

an y

ou s

ee th

e no

rmal

wav

efor

m?

Che

ck th

e ou

tput

of C

ompo

nent

sw

itch(

IC50

02).

Can

you

see

the

norm

al w

avef

orm

?

Che

ck th

e in

put o

f MST

3361

(IC70

04

Pin4

1,44

,46)

.C

an y

ou s

ee th

e no

rmal

wav

efor

m?

YES YE

S

YES

NO

P700

4 m

ay h

ave

prob

lem

. Rep

lace

this

Jac

k.

Che

ck th

e ou

tput

of M

ST33

61(IC

7004

).C

an y

ou s

ee th

e no

rmal

wav

efor

m?

YES

Che

ck th

e in

put a

nd o

utpu

t of

BC

M35

50(IC

4006

). Es

peci

ally

you

sho

uld

chec

kTh

e H

,V s

ync

and

cloc

k.C

an y

ou s

ee th

e no

rmal

wav

efor

m?

YES

NO

Afte

r che

ckin

g th

e in

put T

R o

f RG

BH

V, y

ou

shou

ld d

ecid

e to

repl

ace

thes

e co

mpo

nent

s or

no

t.

NO

NO

Afte

r che

ckin

g th

e Po

wer

of M

ST33

61 y

ou

shou

ld d

ecid

e to

repl

ace

MST

3361

or n

ot.

NO

YEX

This

boa

rd h

as b

ig p

robl

em b

ecau

se M

ain

chip

(BC

M35

50) h

ave

som

e tr

oubl

es.

Afte

r che

ckin

g th

orou

ghly

all

path

onc

e ag

ain,

Yo

u sh

ould

dec

ide

to re

plac

e B

CM

3550

or n

ot.

Afte

r che

ckin

g th

e Po

wer

of R

GB

sw

itch

you

shou

ld d

ecid

e to

repl

ace

com

pone

nt s

witc

h or

no

t.

Afte

r che

ckin

g th

e Po

wer

of M

ST33

61 y

ou

shou

ld d

ecid

e to

repl

ace

MST

3361

or n

ot.

- 42 -

- H

DM

I doe

sn't

disp

lay

Che

ck in

put c

onne

ct P

7007

.C

an y

ou s

ee th

e no

rmal

wav

efor

m?

Che

ck D

DC

com

mun

icat

ion

lines

(IC70

13

Pin5

,6)

Che

ck th

e in

put o

f MST

3361

(IC70

04)

This

sig

nal i

s TM

DS.

Can

you

see

the

norm

al w

avef

orm

?

YES YE

S

NO

P700

7 m

ay h

ave

prob

lem

. Rep

lace

this

Jac

k.

Che

ck th

e ou

tput

of M

ST33

61(IC

7004

).C

an y

ou s

ee th

e no

rmal

wav

efor

m?

YES

Che

ck th

e in

put a

nd o

utpu

t of

BC

M35

50(IC

4006

). Es

peci

ally

you

sho

uld

chec

kTh

e H

,V s

ync

and

cloc

k.C

an y

ou s

ee th

e no

rmal

wav

efor

m?

YES

NO

NO

Afte

r che

ckin

g th

e tr

ace

of T

MD

S lin

es a

nd p

ower

of

MST

3361

, you

sho

uld

deci

de to

repl

ace

MST

3361

or

not.

NO

YEX

This

boa

rd h

as b

ig p

robl

em b

ecau

se M

ain

chip

(BC

M35

50) h

ave

som

e tr

oubl

es.

Afte

r che

ckin

g th

orou

ghly

all

path

onc

e ag

ain,

Yo

u sh

ould

dec

ide

to re

plac

e B

CM

3550

or n

ot.

Afte

r che

ckin

g th

e Po

wer

of t

his

chip

, you

sh

ould

dec

ide

to re

plac

e th

is o

r not

.

Afte

r che

ckin

g th

e Po

wer

of M

ST33

61 y

ou

shou

ld d

ecid

e to

repl

ace

MST

3361

or n

ot.

YES

Che

ck H

DC

P co

mm

unic

atio

n lin

es(IC

7005

Pi

n5,6

)

NO

Afte

r che

ckin

g th

e Po

wer

of t

his

chip

, you

sh

ould

dec

ide

to re

plac

e th

is o

r not

.

- 43 -

300

200

310

500

510

120

820

801

802

80380

0

804

600

610

530

520

400

810

840

900

807

830

80580

6

EXPLODED VIEW

200T

Feb., 2007Printed in KoreaP/NO : MFL36768812