I have a 4 blink code on P50V20A full HD about 14 months old.
Interesting fault to say the least. I isolated the SC board and the blinks changed, green led lit on the SS and managed to measure VS at 204 volts under this condition for the 3 seconds the set powered up.
When the Sc is connected 4 blinks and no led lit on that board or the SS and the set turns off straight away.
So I've headed for the SC and so far there are banks of FETs and diodes dead short all over this board.
No wonder the PSU is spitting out 4 blinks with dead shorts. The VS does not even get a raise when the SC is connected.
I checked the buffers, nothing burnt and did not find any shorts.
Here's the list and I am using the TC-P50VT20 GPF13DU Chassis service manual to fault find this as I can not find my exact model.
TH-P50V20A
SC-board TNPA5081
Board Loc# Schematic# Part# description
D482 D16482 B0FACP000003 DIODE (RFN25)
Q452 Q16452 B1JAEP000012 TRANSISTOR (45G128)
Q402 Q16402 DG3D5020CSLW TRANSISTOR (DG502LW)
Q403 Q16403 DG3D5020CSLW TRANSISTOR (DG502LW)
Q421 Q16421 DG3D4020CSRP TRANSISTOR (DG402RP)
Q660 Q16660 B1CERR000042 FET (R5007)
Q661 Q16661 B1JAER000010 TRANSISTOR (RJP63F4A)
Can any brainiacs out there help with datasheets or substitute parts? Searching is not getting me far. It's as if Panasonic use custom parts or numbers.
Very frustrating.
Interesting fault to say the least. I isolated the SC board and the blinks changed, green led lit on the SS and managed to measure VS at 204 volts under this condition for the 3 seconds the set powered up.
When the Sc is connected 4 blinks and no led lit on that board or the SS and the set turns off straight away.
So I've headed for the SC and so far there are banks of FETs and diodes dead short all over this board.
No wonder the PSU is spitting out 4 blinks with dead shorts. The VS does not even get a raise when the SC is connected.
I checked the buffers, nothing burnt and did not find any shorts.
Here's the list and I am using the TC-P50VT20 GPF13DU Chassis service manual to fault find this as I can not find my exact model.
TH-P50V20A
SC-board TNPA5081
Board Loc# Schematic# Part# description
D482 D16482 B0FACP000003 DIODE (RFN25)
Q452 Q16452 B1JAEP000012 TRANSISTOR (45G128)
Q402 Q16402 DG3D5020CSLW TRANSISTOR (DG502LW)
Q403 Q16403 DG3D5020CSLW TRANSISTOR (DG502LW)
Q421 Q16421 DG3D4020CSRP TRANSISTOR (DG402RP)
Q660 Q16660 B1CERR000042 FET (R5007)
Q661 Q16661 B1JAER000010 TRANSISTOR (RJP63F4A)
Can any brainiacs out there help with datasheets or substitute parts? Searching is not getting me far. It's as if Panasonic use custom parts or numbers.
Very frustrating.
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