TC-P55GT30 6 blinks

[iddomilan]

I recently acquired a TC-P55GT30 with the 7 blink problem. After a bunch of online research, I learned a bunch of parts fail on the SC board causing 7 blinks so I purchased the repair kit from shopjimmy to fix it. After replacing all of the parts with the new kitted parts, I no longer get 7 blinks :-) but the bad news is I get 6 blinks instead :-( If I removed the SC20 ribbon cable, I get 8 blinks, which according to my research means a problem still exist on the SC board. I have looked for shorts, but I am not finding anything. Any suggestions besides buy a new SC board? I am not finding a ton of information on the 6 blink problem as I did on the 7 blink problem. I have been trying to reverse engineer the energy recovery circuit which I am hoping will help me find the issue but so far no luck. I spent some time looking for IC16581 but can't even find it on the SC board. I'm stuck, please help........

[gdawg]

Re: TC-P55GT30 6 blinks

I would start by checking all the ribbon and any connectors to make sure they are seated properly. I had one that the ribbon between the SU and SD board was not quite square and it threw a 7 blink code. I almost started tearing everything apart when I found it. Did you test the IGBT's under the small heatsinks?? You have to probe thru the silicone that covers the pins, but again, I overlooked one of those and I also had bought the SJ kit. I am not real familiar with the 6 blink code, so hopefully some one will chime in that knows more on the 6 blink. Have you tested the tv with the buffers totally disconnected and SC50 socket jumped??

[iddomilan]

Re: TC-P55GT30 6 blinks

I would start by checking all the ribbon and any connectors to make sure they are seated properly. I had one that the ribbon between the SU and SD board was not quite square and it threw a 7 blink code. I almost started tearing everything apart when I found it. Did you test the IGBT's under the small heatsinks?? You have to probe thru the silicone that covers the pins, but again, I overlooked one of those and I also had bought the SJ kit. I am not real familiar with the 6 blink code, so hopefully some one will chime in that knows more on the 6 blink. Have you tested the tv with the buffers totally disconnected and SC50 socket jumped??

I have checked all of the ribbon cables and parts under the heatsinks. All appears OK. I actually removed the heatsink to probe the FETs instead of probing through the silicon. None are shorted.

I did try the isolation procedure and still get 6 blinks. According to the manual, there is still a problem on the SC board.

[iddomilan]

Re: TC-P55GT30 6 blinks

Anyone?

[Moreno83]

Re: TC-P55GT30 6 blinks

Did you also replace the small 8 legged IC and resistors? Can you recheck all IGBT's and diodes for shorts?

Q401

Q402

Q403

Q421

Q422

Q423

Q531

IC502

D401

D421


There are also parts on the PS that CAN fail when the 7 blink occurs. Check those IGBT's under the heatsink.

[iddomilan]

Re: TC-P55GT30 6 blinks

Did you also replace the small 8 legged IC and resistors? Can you recheck all IGBT's and diodes for shorts?

Q401

Q402

Q403

Q421

Q422

Q423

Q531

IC502

D401

D421


There are also parts on the PS that CAN fail when the 7 blink occurs. Check those IGBT's under the heatsink.

I will recheck tonight