Viera Plasma Display PC Board Recycling Component Level...

Viera PlasmaViera Plasma Display Display PC Board Recycling PC Board Recycling

Component Level RepairComponent Level Repair

Curriculum Content

Course 1

PCI PCB Recycling Program/Process

Model line-up/PC board functionality

Course 2

PCB Recycling Component Level Repair Techniques

Course 3

Understanding How System Shut Down Operates

Course 4

Troubleshooting Hints / Common Symptoms

END

Servicentre determines a returnable PC board is defective.

Servicecentre orders replacement PC board from Panasonic National Parts

After repairing the product, servicecentre returns the following to Panasonic National Parts:Returnable PC board/part Completely fill out Returnable Parts Report form

Once Panasonic National Parts receives the defective sub-assembly with all the required documents, They will:•Forward a copy of Returnable Parts form to NWCS then payment is issued to the servicentre.•Note: for O/W: NP Issues dud credit payment to servicentre for returning the defective sub-assembly.

Procedure for Returning Returnable PC board

Returnable Parts Return Form:

Must be completely filledout and sent together withthe defective PC board.

If a board is being returned that is unused please clearly mark the form as unused.

Model line up and PC board functionality

2005/2006 PDP Line-up2005/2006 PDP Line-up

20052006

TH-50PX500TH-50PX500


TH-42PD50TH-42PD50

TH-50PX50TH-50PX50

TH-42PX50TH-42PX50

TH-37PX50TH-37PX50



TH-42PD60TH-42PD60

TH-50PX60TH-50PX60

TH-42PX60TH-42PX60

TH-37PX60TH-37PX60

SD Leader Model

HD Step Up Model

HD Leader Model


TH-58PX60TH-58PX60

2005: 50PX500/PX50 2006: 50PX600/PX60

Differences 1. The PB and Z board are now on the PA Board 2. Location of the PA and D board was changed 3. HDMI interface (DV) relocated. 4. HC board added （ factory use)

C2

SU

SD

C1 C3

C6 C4C5

SS2

SCScan Drive

P PowerSupplyD

Format ConverterPlasma AI Processor

ZAudioAmp

H AV Terminal

DGDigital Signal

Processor

PADC-DC-

Converter

PBFan ControlAudio Power

DTD-TV Interface

G Front TerminalPC Card

GKKey SW

SPOWER SW

SSSustainDrive

SS3

KREMOTE, LED

DVHDMI

C2

SU

SD

C1 C3

C6 C4C5

SCScan Drive

P PowerSupply

G Front Terminal GKKey SW

SPOWER SW

KREMOTE, LED

SS2

SSSustainDrive

SS3

DG

HAV Terminal

DT

D

HC

PADC-DC-

Converter

D-TV Interface

PX500only

GSSD Card

GSSD Card

2005 & 2006 PC Board Difference (for 50” models)

2005 & 2006 PC Board Difference (for 42 & 37” 2005 & 2006 PC Board Difference (for 42 & 37” models):models):

2005: 42/37/PX500/PX50/PD50 2006: 42/37/PX600/PX60/PD60

Differences1. The PB and Z board are now on the PA Board2. Location of the PA and D board was changed3. HDMI interface (DV) relocated.4. HC board added （ factory use)5. Reduce the upper C boards for single scan.6. Reduce the S2 and S3 boards.

SCScan Drive

P PowerSupplyD

Format ConverterPlasma AI Processor

SU

SD

ZAudioAmp

H AV Terminal

DGDigital Signal

Processor

PADC-DC-

Converter

PBFan ControlAudio Power

DTD-TV Interface

SSSustainDrive

SPOWER SW

KREMOTE, LED

DVHDMI

SS3

SCScan Drive

P PowerSupply

C1 C2

SU

SD

SSSustainDrive

SPOWER SW

KREMOTE, LED

DT

H

AV TerminalDG D

HC

PADC-DC-

Converter

PX600/60only


D-TV Interface

SS2

PX500only


GSSD Card

C4 C3

C2C1

PC CardGS

SD Card

2005 Plasma TV PC Board List

PCB DescriptionTH50PX5

00TH42PX500 TH50PX50 TH42PX50 TH37PX50 TH42PD50

SU Scan Out (Upper)TNPA3219AB

TNPA3189ABTNPA3219AB

TNPA3189AB TNPA3551 TNPA3242

SD Scan Out (Lower)TNPA3220AB

TNPA3190ABTNPA3220AB

TNPA3190AB TNPA3552 TNPA3243

SC Scan DriveTNPA3567

TNPA3557 TNPA3567 TNPA3557 TNPA3573 TNPA3543

SS Sustain DriveTNPA3568


P Power SupplyETXMM564MEK

ETXMM563MDK

ETXMM564MEK

ETXMM563MDK

TNPA3570AB

TNPA3570

DFormat Converter/Plasma AI Processor

TZTNP010YCS

TZTNP010YDS

TZTNP010YCS

TZTNP010YDS

TZTNP010YES

TZTNP010YFS

DG Digital Signal ProcessorTNPA3625AB

TNPA3625TNPA3625AD

TNPA3625ACTNPA3625AE

TNPA3625AF

DV HDMI InterfaceTNPA3626


DT ATSC InterfaceTNAG157S

TNAG157S TNAG146S TNAG146S TNAG146S TNAG156

C1 C1 Data DriverTNPA3561

TNPA3553AB TNPA3561 TNPA3553 TNPA3547 TNPA3545




TNPA3555 TNPA3563 TNPA3555 TNPA3549 NONE


TNPA3556 TNPA3564 TNPA3556 TNPA3550 NONE


NONE TNPA3565 NONE NONE NONE

C6 C6 Data DriverTXNC61BHTUJ

NONETXNC61YCSU

NONE NONE NONE

PADC-DC Converter/Power SOS

TNPA3620AE

TNPA3620AE TNPA3620 TNPA3620 TNPA3620 TNPA3620

PB Audio Power/Fan ControlTNPA3643AD

TNPA3643ADTNPA3643AC

TNPA3643ACTNPA3643AC

TNPA3643

H AV Terminal/AV SwitchTNPA3598

TNPA3598TNPA3598AC

TNPA3598ACTNPA3598AC

TNPA3598AB

Z Speaker Amplifier TNPA3621TNPA3621AB

TNPA3621AB

2006 Plasma TV PC Board List

2005 & 2006 PC Board Difference:2005 & 2006 PC Board Difference:

Easier connection and parts change

Lead connector

Bridge connector

Before

After

SU board

Connecting behind the board Connecting on the board

Before

After

→

General SignalGeneral Signal Circuit Flow for Circuit Flow for 20062006 Model ( Model (42V & 37”):42V & 37”):

Input Source Signal Processor Panel Drive

DT: ATSC Interface and tuner

H : AV Terminal / AV Switch PC (PX600 Only)

GK: Key Switch

K : Remote Receiver / Power LED

G : Front terminal

GS: SD Card Slot (PX600/60 Only)

DG: Digital Signal　　　　　 Processor / HDMI Interface D : Format Converter / Plasma AI Processor / Sub-Field Processor PA: Audio AMP / Speaker out

SC: Scan Drive

SU: Scan Out (Upper)

SD: Scan Out (Lower)

SS: Sustain Drive

C1: Data Drive (Right)

C2: Data Drive (Left)

DG

DT

GK

H D SC

SU

SD

SPEAKER　（ L/R ）

C1 C2

SS

HDMI

Panel (HD or SD)

PA

GS

GK

PX600PX60only

PX600PX60only

R,G,B :10Bit (MAIN)

R,G,B :10Bit (Sub)

SD Card DG

OSD

To D Board

MAINMICRO

PROCESSOR

IC1103

IC2601

H

10bit A/D

GC3 FS

GC5

IC4037

HDMI2

(*1) LVDS : Low Voltage Differential Signaling

<H Board> IC2601 : VIDEO SELECT <DG Board> IC4019 : A/D CONVERTER (10Bit) IC4020 : SIGNAL PROCESSOR (For SUB WINDOW) IC4037 : SIGNAL PROCESSOR (I/P CONV. ,RESIZE MIX … ) IC4036 : LVDS TRANSMITTER IC1103 : MAIN MICRO PROCESSOR

LVDS Signal

R,G,B,HS,VS

Y,C / V

Y,C / V

Y,Pb, Pr

AV1

AV2LVDS (*1)

TRANSMITTER

IC4036

R,G,B :10Bit

V

PC

General Video Signal Processing: General Video Signal Processing: PX600/60 series

Y,Pb,PrComp.2

G

AV3

Y,C / V

HDMI1

HDMI I/F

IC4026

Comp.1

PEAKSLITE

IC8240TUNER ATSC

LSI

IC8211

Y/C (for Monitor Out)

Included OSD

Digital

DT

GS

Y/CMonitor Out

VIDEOSWITCH

IC2601

Y,Pb,Pr (Sub)

Y,Pb,Pr (Main)

IC4020

IC4019

PX600 only

Analog

Thank You For Completing Course One

Course TwoPCB Recycling Component Level Repair

Techniques

Viera PlasmaViera Plasma Display PC Board Recycling Display PC Board Recycling Component Level RepairComponent Level Repair

Course 2PCB Recycling Component Level Repair Techniques

Adjustments Procedure

I. Item preparation:

1. Input a white signal. (please refer to the next slide on several ways to generate a white pattern).

2. Set picture controls as follows:Picture menu: DynamicP-NR: OFFAspect: 16:9

CAUTION:1. Perform Vsus adjustment first.2. Confirmation of Vscn voltage should be done after confirmation of

Vad adjustment.When Vad = -105V, Vscn voltage is 35V +/- 4V.

The following adjustment procedures are mandatory after replacing theSC, SS & P boards. It is also required if the Panel is replaced.

1. External pattern generator.

2. Internal white pattern in Service mode. (Please see next slide on how to enter Test Pattern Mode).

3. Disconnect LVDS cable DG5 on the DG board to display white pattern.

Several ways to generate White Pattern signal:

White RedGreen Blue ON/OFF Aging

Ramp RedRamp GreenRamp Blue1% windowColor barA and B zoneScroll

Ramp white

Test Pattern

Entering Test Pattern Mode:

How to enter test pattern mode:1. While pressing "VOLUME-" button of the TV set, press

“RECALL” button of the remote control three times within 2 seconds.

2. Push button "1" of remote control several times, and select "OPTION” setting.

3. Press "OK" button of Remote controller for three seconds or more to place the unit in the test pattern mode.

II. Driver Adjustment TH42PX60

Name Test Point Voltage Volume Remarks

Vsus TPVSUS (SS) Vsus ± 2V VR251 (P) *

Ve TPVE (SS) Ve ± 2V VR6000 (SS) *

Vset TPVSET (SC) 280V ± 7V Fixed

Vad TPVAD (SC) -105V ± 1V VR6600 (SC)

Vscn TPVSCN (SC) Vad+140V ± 4V Fixed

Vda TPVDA (SS) 75V ± 1V Fixed

Adjustment voltage

III. Initialization Pulse Adjustment

1. Input a White signal into the unit.2. Set picture controls as follows:

Picture Menu: DynamicP-NR: OFF

3. Connect oscilloscope probe to test point TPSC1 (T2).Adjust VR6602 to obtain 195 +/- 10 µsec for T2.

Note: Connect oscilloscope’s negative probe to common ground(Please use panel metal chassis as common ground)

Adjustment necessary when PC board exchanged

Adjust the following voltages using a multimeter:

PCB Adj Pt TP Voltage Volume

P

Vsus TPVSUS (SS) *Vsus +/-2V R628(P)

Vdat P12-1,5(P) 75.5+/-0.1V R665(P)

PFC C445(P) 396V+/-0.5V R443(P)

SC Vad TPVAD(SC) -105+/-1V VR6600(SC)

SS Ve TPVE(SS) *Ve+/-2V VR6000(SS)

D, DG White balance and black pedestal level confirmation necessary.

Caution: Do not adjust Vsus below Ve to avoid damage to PCB.

*Please refer to Panel label for set value.

Common symptoms experienced if the adjustment is not performed

• Several images maybe displayed at the same time.• Excessive brightness.• Low brightness.• Wrong hue/color.• Reduction of the life of the panel.

POWER SUPPLY

Sequence of events when Plasma TV is plugged in

When a Plasma TV is plugged in, there are a few indications of normaloperation. Knowing these will help us understand what’s going on with the unit when an abnormality occurs.

1. There is a click from relay RL402 and RL403 when they are activated.

2. The LED in the optical jack (inside the DT board) turns ON for approximately 4 seconds.

3. Immediately after, the relay click the Tuner LEDs turn ON for approximately 20 seconds.

4. The LED in the optical jack turns ON again for approximately 1 second and both LEDs (tuner and optical jack) turn OFF.

5. Then another click is audible from relays RL402 & RL403, indicating that they are no longer engaged. Note at this time, LEDs (for Tuner & optical jack) are turned OFF.

Standby Block (Part1)

Standby Block (Part2)

Power Supply (Standby Circuit)

STB 5V Distribution

Power Supply (Standby Circuit)

STB5V, STB3.3V & STB1.5V

PP

F-STB-ON (Primary)

PP

F-STB-14V

PP

STB5V and TV-SUB-ON function on PA board

PPAA

SUB-Voltages Output from the PA board

PA Board Test Points

POWER ON

Panel Standby ON Circuit

3.33.3vv

Power Supply Secondary Circuit

VSUS and VDA Circuit

PA Board Circuit Explanation

Main voltages output from the PA Circuit

5V Distribution

VSUS Distribution

Troubleshooting Guide

Can the click sound from the relay beHeard after the TV is plugged into the wall

Outlet?

Is there a 5V at pin1 of connector PA40 on the PA board?

Wait for approx. 20 sec. after applying power then turn the power ON.

Replace P BoardIs there 2.5V at pin 13 of

connectorP25 on the P Board?

Replace P Board Replace DG Board

Replace D Board

Replace P BoardIs there 3.3V at pin 1 of connectorHC01 on the HC Board?

Can the click sound from the relays be heard whileattempting to turn the power ON?

Is there 2.5V at pin 17 of connector P25 on P Board?

YES

YESNO

NO

YES NO NO YES

NO

YESYES

Thank You

For Completing Course Two

Course Three

Understanding How System Shut Down Operates

Viera PlasmaViera Plasma Display PC Board Recycling Component Level RepairDisplay PC Board Recycling Component Level Repair

Course 3Course 3Understanding how System Shut Down operates

A short circuit on the voltage lines.

Over-voltage condition.

Abnormality in the Control Drive Pulse circuit i.e.

SC, SS, SU or SD boards.

Missing source voltage to the PA board (STB14V) from

P board.

Missing output voltage from the PA board to the DG board.

Missing 15V or Vsus on either SS or SC board while the control drive pulses from the D board are being provided.

Possible causes of shutdown

D BOARD SOS DETECT

D Board SOS detect

SOS line Line Monitored

# of times LED blinks

SOS 2 15V 2 blinks

SOS 3 P3.3V(15V & STB5V)

3 blinks

SOS 4 PS 4 blinks

SOS 5 5V 5 blinks

SOS 6 SC1 6 blinks

DRV RST 5V DET 6 blinks

SOS 7 SC2 7 blinks

SOS 8 SS 8 blinks

DG BOARD SOS DETECT

DG Board SOS detect

SOS line Line Monitored # of times LED blinks

STB 3.3V DET STB 3.3V 10

MAIN 3.3V DET MAIN 3.3V 10

SUB 5V DET SUB 5V 10

SUB 9V DET SUB 9V 10

PA-TUNER-SOS PA & Tuner +30V 10

FAN SOS FAN CIRCUIT 11

SOUND SOUND OUTPUT CIRCUIT

12

PA Board Test Points

PA Board Over Voltage Protection

PA Board Loss of Sub-Voltage Protection

PA Board Loss of Main-Voltage Protection

PA Voltage Output

PA SOS Detect Circuit

LED BLINKING 10 TIMES

When the power LED blinks 10 times right after the Plasma TV has been plugged in to the AC source, the possible defective boards are:

P BoardPA BoardDG BoardH Board DT Board

How to Rule out the P Board

1. Use a Peak Hold Meter for voltage reading

NOTE: Follow this procedure when the click sound of the relay can be heard after the unit is plugged in. If the relay does not click, check the STB 5V from the P board. If the STB 5V is missing, the P board may be defective. (If STB 5V is OK, the DG board may be defective.

2. Disconnect Connector P10 on the P board. (Make sure that the TV is unplugged)

3. Because you only have 2 – 3 seconds to measure the STB14V, place your meter’s probe at pin 1 of connector 10 of the P board before plugging the TV in to the AC line.

4. Plug the TV in to the AC line while still holding the probe at Pin 1.

5. Check to see if the 14V comes up. If it does not come up the P board is defective. If it does, (since it may take some involvement to determine which of the PA or DG board is defective) it is OK to order both the PA and DG board together.

To rule out H Board

1. Disconnect connector H40 then plug Plasma TV to AC line.

2. If the power LED stops blinking, the H board may be defective, otherwise another board is causing the problem.

NOTE: It is recommended that the PA board be replaced at the same time if the H board is suspected to be defective and will be replaced.

To rule out the DT (Digital Tuner) Board

1. Remove the DT board and then plug the Plasma TV into an AC source.

Note: When the DT board is removed, the unit will still power up but all functions are disabled due to the lack of data communication

2. If the power LED stops blinking the DT may be defective otherwise, another board is causing the problem.

3. Other possible causes of blinking are the PA or DG board.

D Board SOS Detect

DG Board SOS Detect

15V Distribution

15V SOS

LED BLINKING 5 TIMES

• This blinking code is caused by an abnormalities in the 5V voltage supply line.

• Other possible cause is a problem in Vda supply voltage line.

5V Distribution Line

5V SOS

Other Cause of 5V SOS

• The Power LED can also blink 5 times if the Vda voltage is shorted. This is normally caused by the Panel demultiplexer ICs.

5V & Vda Distribution on the C Board

Procedure to properly isolate C Board

• When the ribbon cables from the D board to the C boards are disconnected in order to isolate the C boards, the LED will blink 6 times.• To properly isolate the C boards to avoid 6 blinks, TP9387 (on the D board) should be grounded by a 1Kohm resistor.

Note: The next slide will show reasons why SOS 6 blinks is generated when the ribbon cables are removed.

• The Vda connector should also be disconnected.

Drive Reset Circuit

BT30V (Tuner SOS) Detect Circuit

D2663D2663

Sound SOS Detect Circuit

Digital Temperature Sensor

Digital Temperature Sensor (continued)

Fan SOS

Fan SOS

• To determine if the fan is the cause of the 11 blinks, simply use a peak hold meter to determine if pin 3 of the fan connector goes high before shutdown.

• If it does, the fan is defective.

• If not, check the other fans and the fan drive circuitry.

No Video and No OSD

Determining whether a no video or no OSD symptom is caused by the video process or the panel drive circuit

Isolation of SC & SS Board

• If any of the connectors providing the 15V or Vsus voltage to the SC or SS board is disconnected, while the connectors providing the scan and sustain drive pulses are present coming from the D board, the Plasma TV will shutdown.

Isolation of the SC & SS Board

Isolation of SC Board

SC2, SC23 & SC20 Disconnected

In this condition, when the SC2 SC20 & SC23 are disconnected the SC board is completely isolated from sources (P and D board).

The power LED stays on and the panel is primed as seen on this picture.The power LED stays on and the panel is primed as seen on this picture.

Expectations when isolating SC Board

7


Sometimes the TV will go intoShutdown indicating that the

problem is located on the SC Board. This does not necessarily

mean that the SC board is the cause of the Problem.

Isolation of SU Board

Isolation of SD Board

Isolation of SS Board


SS23 Disconnected on the SS board(No Drive pulses from the D board)

No VDA voltage to the C boards(Reason why the screen is black)


Missing Drive Pulses from the D board SS11 and SS23 Disconnected, but VDA voltage provided to pin 12 of

SS23 cable

Defective D Board

Defective SC Board

Thank You

For Completing Course Three

Course Four

Troubleshooting Hints / Common Symptoms

Viera PlasmaViera Plasma Display PC Board Recycling Display PC Board Recycling Component Level RepairComponent Level Repair

Course 4Troubleshooting Hints / Common Symptoms

1. Model: TH37PX50PCB designation: SC BoardPart #: TNPA3573

Symptom: Dead/LED off (no blinking code).

Cause: Vsus voltage line shorted to ground due to shorted transistors.

Remedy: Replace Q6611, Q6612, Q6613, Q6613, D6609, open R6710 & R6708. After replacement, check that Vsus line is no longer shorted to ground.

Common Problems

VSUS

R6708 & R6710:

Part No.ERX2FJSR22D

D6609:

Part No.B0HBSN000008

Q6611-Q6613:

Part No.B1JADN000002

Please refer to the attached Technical Bulletin TT-08-02

2. Model: TH42PD50PCB designation: SC BoardPart #: TNPA3543

Symptom: Picture pixelized @ area horizontally across the screen.

Cause: Initialization pulse T2’s level settings is misadjusted.

Remedy: Adjust VR6557 to obtain specified level settings (T2=184 µsec).(Please refer to service manual for complete Initialization Pulse Adjustment procedure).

(1) (2) (3)

Common Problems


3. Model: TH42PD50PCB designation: C1 BoardPart #: TNPA3545

Symptom: Blue vertical line @ right most edge of the screen.

Cause: Missing data line.

Remedy: Open R7125

R7125:

Part No.ERJ6GEYJ102

Common Problems

Please refer to the attached Tech Bulletin TT-08-03

4. Model: TH42PD50PCB designation: SC BoardPart #: TNPA3543

Symptom: After pressing power button, unit shutdown then LED blinks 7X

Cause: SOS protection circuitry detects problem in scan output waveform Vf due to shorted scan output transistor Q6511.

Remedy: Replace both Q6511 and Q6512 at the same time.

Q6511 & Q6512:

Part No.B1DFGL000008

Common Problems

Please refer to the attached Tech Bulletin TB-08-04

5. Model: TH42PX50 / TH42PX500PCB designation: SC BoardPart #: TNPA3557

Symptom: Distorted picture.

Cause: Missing TPVSET voltage due to open R6602 & shorted C6526

Remedy: Replace R6602 & C6526.Parts list

1. R6602:

Part No. ERG1FJS471D

2. C6526:

Part No. ECA2AHG470

Common Problems

Please refer to the attached Tech Bulletin TB-08-09


Symptom: After pressing power button, unit shutdown then LED blinks 7X

Cause: SOS protection circuitry detects problem in scan output waveform Vf due to shorted scan output transistor Q6511.

Remedy: Replace both Q6511 and Q6512 at the same time.

Q6511 & Q6512:

Part No.B1DFFM000003

Common Problems


7. Model: TH42PX50 / TH42PX500PCB designation: P BoardPart #: ETXMM563MDK

Symptom: Dead/relay will not click & LED remains off (no blinking code).

Cause: No output from power output control module.

Remedy: Replace MC701.

MC701 (Power Output Control Module)

Part No.IXMM564M-D-9

Common Problems


8. Model: TH42PX50 / TH42PX500PCB designation: P BoardPart #: ETXMM563MDK


Cause: No standby voltage.

Remedy: Replace IC501.

Parts list

IC501

Part No.MIP3E30MP

Common Problems



Parts list

Q6604 & Q6654:

Part No.B1DFFM000003

Symptom: After pressing power button, unit shuts down then LED blinks 7X

Cause: SOS protection circuitry detects problem in scan output waveform Vf due to shorted scan output transistor Q6604 & Q6654.

Remedy: Replace Q6604 and Q6654.

Common Problems


10. Model: TH50PX50 / TH50PX500PCB designation: SS BoardPart #: TNPA3568

Symptom: Upon power ON, relay clicks then LED blinks 8X.

Cause: No sustain pulse output waveform due to shorted D6020 and/or D6021.

Remedy: Replace both: D6020 & D6021 at the same time.Parts list

D6020 & D6021:

Part No.B0HBSN000008

Common Problems


11. Model: TH50PX50 / TH50PX500PCB designation: P BoardPart #: ETXMM564MEK


Cause: No primary supply to T501 thereby no secondary voltage outputs. Due to open in-rush current limiter K601 & open RF601.

Remedy: Replace K601 & RF601.

Parts list

K601:

Part No. DG12D1-0

RF601:

Part No.HUF5K100J14

Common Problems


12. Model: TH50PX50 / TH50PX500PCB designation: P BoardPart #: ETXMM564MEK

Parts list

MC501:

Part No.IXMM564M-C-9

Symptom: Upon power ON, relay clicks then LED blinks 10X.

Cause: No switching voltage output from F14_ON or 12V/15V_ON pins..

Remedy: Replace power module MC501.

Common Problems


13. Model: TH50PX60 / TH50PX600PCB designation: SC BoardPart #: TXNSC1BHTUJ

Symptom: Very intermittently unit shutdown and LED blinks 7X.

Cause: No solder @ pin 4 of IC6773.

Remedy: Resolder pin 4 of IC6773.

SC BOARD

IC6773

Common Problems

14. Model: TH42PD60PCB designation: P BoardPart #: TXN/P1ZQTUS

Symptom: Shuts down with power LED blinking 10x.

Cause: Missing 395Vdc output due to shorted Q412 & Q413.

Remedy: Replace Q412, Q413, Q408, Q409, R478 & PR401 on the P board.

Common Problems

Parts list 1. Q412 & Q413:

Part # - B1DAGQ000013

2. Q408 & Q409: Part # - B1DHCD000034

3. R478: Part # - ERJ8GEYJ220

4. PR401: Part # - K5Y502BA0001

Q412

Q413

Q408

R478

Q409

PR401

15. Model: TH42PD60PCB designation: P BoardPart #: TXN/P1ZQTUS

Symptom: Dead/power LED off (no blinking code).

Cause: No primary AC voltage inputs due to open fuses caused by Q406 shorting out. Remedy: Replace F401, F402, Q406 & check/replace thermal resistor (R410) on the P board.

Common Problems

Parts list

1.Q406:

Part # - B1DEHQ000014

2.R410:

Part # - D1F5100E0003

3.F401 & F402:

Part # - K5D802BNA005

F401 & F40

2

R410

Q406

16. Model: TH42PX60PCB designation: D BoardPart #: TNPA3810AHS

Symptom: Picture disappears after few minutes but sound is OK.

Cause: Low Ldo_5V supply to IC9800 (DC to DC Converter) due to leaky D9801.

Remedy: Replace D9801 on the D board.

Common Problems

Parts List

D9801:

Part # - B0JCDD000002

D9801

17. Model: TH42PX60PCB designation: P BoardPart #: TXN/P1BFTUS & TXN/P1BFTU

Symptom: Shuts down with power LED 10 blinks. Cause: Missing 395Vdc output due to shorted Q412 & Q413. Remedy: Replace Q412, Q413, Q408, Q409 & PR401 on the P board.

Common Problems

Parts list 1. Q412 & Q413:

Part # - B1DAGQ000070

2. Q408 & Q409: Part # - B1DHCD000034

3. PR401: Part # - K5Y502BA0001

Q412

Q413

Q408Q40

9

PR401

18. Model: TH37/42PX60&42PX600 PCB designation: P Board Part #: TXN/P1BKTU (for TH37PX60),TXN/P1BJTUS (for TH42PX60) & TXN/P1BFTUS (for TH42PX600)

Symptom: Dead/power LED off (no blinking code).

Cause: No primary AC voltage inputs due to open fuses caused by Q406 shorting out.

Remedy: Replace F401, F402, Q406 & check/replace thermal resistor (R410) on the P board.

Common Problems

Parts list

1.Q406:

Part # - B1DEKQ000003

2.R410:

Part # - D1F5100E0003

3.F401 & F402:

Part # - K5D802BNA005

F401 & F40

2

R410

Q406

Thank You

For Completing Course Four

-END –

HAVE A NICE DAY

Viera Plasma Display PC Board Recycling Component Level...

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