Hi every one. I just want to share the successful repair of my shorted Panasonic TNPA4782AB SC board.
I don't usually do it but so many parts were shorted that I decided to buy the ShopJimmy repair kit instead of sourcing each components individually. Here is the list of components the kit contained, with a remark indicating if I needed that part or not :
D608, good
D618 RF101L4S, good (See warning 1 below)
D619 RF101L4S, good (See warning 1 below)
D865 RF101L4S, shorted (See warning 1 below)
IC464 Inverter HA MC74HC1G14, shorted
IC465 Inverter HA MC74HC1G14, shorted
IC501 M81707FP, replaced by safe mesure
IC521 M81707FP, replaced by safe mesure
IC561 TC74VHCT541AFT, replaced by safe mesure
IC562 TC74VHCT541AFT, replaced by safe mesure
IC724 SOT-89 5 volt regulator, good
IC725 SOT-89 5 volt regulator, good
IC771 SOT-89 5 volt regulator, good
IC773 Inverter HA MC74HC1G14, shorted
PC461 PS9817A-2 dual optocoupler replaced in kit by PC4D10SNIP0F, failed
PC601 PS2701A-1 optocoupler, good
Q401 2PG011, shorted
Q402 2PG011, shorted
Q403 2PG011, shorted
Q421 30G123, shorted
Q422 30G123, shorted
Q423 30G123, shorted
Q441 45G127, shorted
Q451 45G127, good
Q501 CPH5524, good
Q502 CPH5524, good
Q521 CPH5524, good
Q522 CPH5524, good
Q531 CPH5524, good
Q551 CPH5524, shorted
Q601 RJK6026, good (See warning 2 below)
Q604, good
Q660 RJK6026, good (See warning 2 below)
Q661 RJP6065, shorted
Q762 CPH5524, good
R506 10 ohm resistor, good
R507 10 ohm resistor, good
R521 100 ohm resistor, good (See warning 3 below)
R522 100 ohm resistor, open (See warning 3 below)
R551 10 ohm resistor, open
R606 10k ohm, good
Additional parts replaced that were not included in the kit:
Q701 MMBTA92 (7EW, 300V 100mA, PNP), shorted
Q702 2PD601ART, shorted, replaced by MMBT3904
Warnings: The ShopJimmy kit contained some wrong parts:
1. The bag for D618, D619 and D865 contained RF101L2S diodes (marked 66 and rated at only 200v) instead of RF101L4S diodes (marked 88 and rated at 400v).
2. The bag for Q601 and Q660 contained one RJK6026 and one RJP6026, instead of two RJK6026. Anyway, I didn't need those parts.
3. The bag for R521 and R522 contained two 0.47 ohm resistors instead of 100 ohm resistors. I spotted the error and sourced the good value.
I thought that they substituted the diodes in Warning 1 for good ones but I was wrong. After the repair the board shorted again on power-on because of those bad diodes in the kit. Those parts needed to be replaced a second time:
D865
IC773
Q403
Q422
Q661
Q701
Q702
After the second repair the TV set powered up correctly. But it has been an extensive repair. 23 components total have been replaced.
I hope this will help someone.
I don't usually do it but so many parts were shorted that I decided to buy the ShopJimmy repair kit instead of sourcing each components individually. Here is the list of components the kit contained, with a remark indicating if I needed that part or not :
D608, good
D618 RF101L4S, good (See warning 1 below)
D619 RF101L4S, good (See warning 1 below)
D865 RF101L4S, shorted (See warning 1 below)
IC464 Inverter HA MC74HC1G14, shorted
IC465 Inverter HA MC74HC1G14, shorted
IC501 M81707FP, replaced by safe mesure
IC521 M81707FP, replaced by safe mesure
IC561 TC74VHCT541AFT, replaced by safe mesure
IC562 TC74VHCT541AFT, replaced by safe mesure
IC724 SOT-89 5 volt regulator, good
IC725 SOT-89 5 volt regulator, good
IC771 SOT-89 5 volt regulator, good
IC773 Inverter HA MC74HC1G14, shorted
PC461 PS9817A-2 dual optocoupler replaced in kit by PC4D10SNIP0F, failed
PC601 PS2701A-1 optocoupler, good
Q401 2PG011, shorted
Q402 2PG011, shorted
Q403 2PG011, shorted
Q421 30G123, shorted
Q422 30G123, shorted
Q423 30G123, shorted
Q441 45G127, shorted
Q451 45G127, good
Q501 CPH5524, good
Q502 CPH5524, good
Q521 CPH5524, good
Q522 CPH5524, good
Q531 CPH5524, good
Q551 CPH5524, shorted
Q601 RJK6026, good (See warning 2 below)
Q604, good
Q660 RJK6026, good (See warning 2 below)
Q661 RJP6065, shorted
Q762 CPH5524, good
R506 10 ohm resistor, good
R507 10 ohm resistor, good
R521 100 ohm resistor, good (See warning 3 below)
R522 100 ohm resistor, open (See warning 3 below)
R551 10 ohm resistor, open
R606 10k ohm, good
Additional parts replaced that were not included in the kit:
Q701 MMBTA92 (7EW, 300V 100mA, PNP), shorted
Q702 2PD601ART, shorted, replaced by MMBT3904
Warnings: The ShopJimmy kit contained some wrong parts:
1. The bag for D618, D619 and D865 contained RF101L2S diodes (marked 66 and rated at only 200v) instead of RF101L4S diodes (marked 88 and rated at 400v).
2. The bag for Q601 and Q660 contained one RJK6026 and one RJP6026, instead of two RJK6026. Anyway, I didn't need those parts.
3. The bag for R521 and R522 contained two 0.47 ohm resistors instead of 100 ohm resistors. I spotted the error and sourced the good value.
I thought that they substituted the diodes in Warning 1 for good ones but I was wrong. After the repair the board shorted again on power-on because of those bad diodes in the kit. Those parts needed to be replaced a second time:
D865
IC773
Q403
Q422
Q661
Q701
Q702
After the second repair the TV set powered up correctly. But it has been an extensive repair. 23 components total have been replaced.
I hope this will help someone.
