Viera Plasma Display PC Board Recycling. Component Level Repair. Troubleshooting Hints / Common Symptoms

1.

Viera Plasma Display PC Board Recycling
Component Level Repair
Course 4
Troubleshooting Hints / Common Symptoms

2.

Common Problems
1. Model: TH37PX50
PCB designation: SC Board
Part #: 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.
R6708 & R6710:
D6609:
Part No.ERX2FJSR22D
Part No.B0HBSN000008
VSUS
Q6611-Q6613:
Part No.B1JADN000002
Please refer to the attached Technical
Bulletin TT-08-02

3.

Common Problems
2. Model: TH42PD50
PCB designation: SC Board
Part #: TNPA3543
(1)
(2)
(3)
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).
Please refer to the attached Technical
Bulletin TT-08-05

4.

Common Problems
3. Model: TH42PD50
PCB designation: C1 Board
Part #: TNPA3545
Symptom: Blue vertical line @ right most edge of the screen.
Cause: Missing data line.
Remedy: Open R7125
R7125:
Part No.ERJ6GEYJ102
Please refer to the attached Tech
Bulletin TT-08-03

5.

Common Problems
4. Model: TH42PD50
PCB designation: SC
Board
Part #: TNPA3543
Q6511 & Q6512:
Part No.B1DFGL000008
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.
Please refer to the attached Tech
Bulletin TB-08-04

6.

Common Problems
5. Model: TH42PX50 / TH42PX500
PCB designation: SC Board
Part #: TNPA3557
Symptom: Distorted picture.
Cause: Missing TPVSET voltage due to open R6602 & shorted
C6526
Remedy: Replace
Parts list
1. R6602:
Part No. ERG1FJS471D
2. C6526:
Part No. ECA2AHG470
R6602 & C6526.
Please refer to the attached Tech
Bulletin TB-08-09

7.

Common Problems
6. Model: TH42PX50 / TH42PX500
PCB designation: SC Board
Part #: TNPA3557
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
time.
both Q6511 and Q6512 at the same
Q6511 & Q6512:
Part No.B1DFFM000003
Please refer to the attached Technical
Bulletin TT-08-08

8.

Common Problems
7. Model: TH42PX50 / TH42PX500
PCB designation: P Board
Part #: 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
Please refer to the attached Technical
Bulletin TT-08-07

9.

Common Problems
8. Model: TH42PX50 / TH42PX500
PCB designation: P Board
Part #: ETXMM563MDK
Symptom: Dead/relay will not click &
LED remains off (no blinking code).
Cause: No standby voltage.
Remedy: Replace
IC501.
Parts list
IC501
Part No.MIP3E30MP
Please refer to the attached Technical
Bulletin TT-08-06

10.

Common Problems
9. Model: TH50PX50 / TH50PX500
PCB designation: SC Board
Part #: TNPA3567
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.
Parts list
Q6604 & Q6654:
Part No.B1DFFM000003
Please refer to the attached Technical
Bulletin TT-08-12

11.

Common Problems
10. Model: TH50PX50 / TH50PX500
PCB designation: SS Board
Part #: 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
Please refer to the attached Technical
Bulletin TT-08-01

12.

Common Problems
11. Model: TH50PX50 / TH50PX500
PCB designation: P Board
Part #: ETXMM564MEK
Symptom: Dead/relay will not click &
LED remains off (no blinking code).
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
Please refer to the attached Technical
Bulletin TT-08-11

13.

Common Problems
12. Model: TH50PX50 / TH50PX500
PCB designation: P Board
Part #: ETXMM564MEK
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.
Parts list
MC501:
Part No.IXMM564M-C-9
Please refer to the attached Technical
Bulletin TT-08-10

14.

Common Problems
13. Model: TH50PX60 / TH50PX600
PCB designation: SC Board
Part #: TXNSC1BHTUJ
SC BOARD
Symptom: Very intermittently unit shutdown and
LED blinks 7X.
Cause: No solder @ pin 4 of IC6773.
Remedy: Resolder pin 4 of IC6773.
IC6773

15.

Common Problems
14. Model: TH42PD60
PCB designation: P Board
Part #: TXN/P1ZQTUS
Parts list
1. Q412 & Q413:
Part # - B1DAGQ000013
Q412
Q413
R478
2. Q408 & Q409:
Part # - B1DHCD000034
Q408
3. R478:
Part # - ERJ8GEYJ220
4. PR401:
Part # - K5Y502BA0001
PR401
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.
Q409

16.

Common Problems
15. Model: TH42PD60
PCB designation: P Board
Part #: TXN/P1ZQTUS
Parts list
R410
F401 & F402
1.Q406:
Part # - B1DEHQ000014
2.R410:
Part # - D1F5100E0003
3.F401 & F402:
Q406
Part # - K5D802BNA005
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.

17.

Common Problems
16. Model: TH42PX60
PCB designation: D Board
Part #: 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.
D9801
Parts List
D9801:
Part # - B0JCDD000002

18.

Common Problems
17. Model: TH42PX60
PCB designation: P Board
Part #: TXN/P1BFTUS & TXN/P1BFTU
Q412
Parts list
1. Q412 & Q413:
Part # - B1DAGQ000070
2. Q408 & Q409:
Part # - B1DHCD000034
Q409
Q413
Q408
3. PR401:
Part # - K5Y502BA0001
PR401
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.

19.

Common Problems
18. Model: TH37/42PX60&42PX600
PCB designation: P Board
Part #: TXN/P1BKTU (for TH37PX60),TXN/P1BJTUS (for TH42PX60)
& TXN/P1BFTUS (for TH42PX600)
R410
Parts list
1.Q406:
Q406
Part # - B1DEKQ000003
2.R410:
F401 & F402
Part # - D1F5100E0003
3.F401 & F402:
Part # - K5D802BNA005
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.

20.

Thank You
For Completing Course Four
-END –
HAVE A NICE DAY