Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

Got any updates on this one? Just did 2 4782 boards for the G10 series which was interesting

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I was working on it yesterday actually. The last of the parts came in a week ago. Remind me never to order anything from again just before the Chinese new year. Replaced all the parts in my list, got some colorful flashes on the screen for a few seconds, then it went dead again. None of the MOSFETs blew, but I think maybe the driver ICs failed again.

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I was working on it yesterday actually. The last of the parts came in a week ago. Remind me never to order anything from again just before the Chinese new year. Replaced all the parts in my list, got some colorful flashes on the screen for a few seconds, then it went dead again. None of the MOSFETs blew, but I think maybe the driver ICs failed again.

well, I have a working 4782 which I figure i may be able to correlate some check points. Nothing blown and shutdown with what blinks?

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

Oh, and I've done the same re: Chinese new year. yes a lot of interest can be lost waiting.
I found that some different parts subbed work too like M81737FP will be ok for the 707

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I never thought to check the blink code. I'll try it again tomorrow. I know I must be close.

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I never thought to check the blink code. I'll try it again tomorrow. I know I must be close.

ok, another night of boredom for me then

I would stick to the SC50 jumper, disconnect buffers , remove their Vfg bolts (4)and not use the buffers for testing for the time being. I killed my SD/SU set doing something wrong I guess on the G15

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I didn't have those vfg bolts in when I tested. Could that have been the problem?

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I didn't have those vfg bolts in when I tested. Could that have been the problem?

yes, no Vfg bolts and TV will shutdown 7 blinks. made that error rushing putting a 5081 in my TV. Probably very risky running any board unearthed.

that earth point is floating ground, not chassis, needs to be earthed with respect to those on the SC board

Do the Sc50 procedure and if it stays on, Sc has passed. We've been checking the MID volatge which was Tom's tip to sort our boards out as all the other voltages checked out. generally 50% of Vsus

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

What's the SC50 procedure?

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

What's the SC50 procedure?

Leave those 4 bolts off the SD/Su that mount to thos posts on the Sc, Disconnect all connectors (3) to the buffer board.
small white connector with 2 pins marked Sc50, short those pins together.

have everything else as normal, I trust the Sc is fully mounted and bolted , turn TV on and if it completes it's start up as normal no error blinks / shutdown then that's a SC pass.

only do it long enough to confirm, leave it running too long and set will shutdown with 4 blink and the guides say no longer than 30 secs.

You'll need to let the Sc fully discharge otherwise there will be arcing as you hook up the buffers.

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

actually hang on a minute, I can't see sc50 on the 4844, ay need alligator leads to do it a different way.

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

yep, it's there right next to the large white ceramic resistor

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I learned about that arc a while ago on a different Panasonic. I think I almost jumped through the ceiling. As loud as it was, I was surprised it didn't blow the pins off the board.

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I learned about that arc a while ago on a different Panasonic. I think I almost jumped through the ceiling. As loud as it was, I was surprised it didn't blow the pins off the board.

Sure, but just trying to warn you of the chance of shorting the buffers which kind of ruins the party once you get the Sc going and realise you need to spend $$ on a buffer set which i expect are geting scarce. I got very lucky and a guy was stripping his 50G15.

Scored the dead Sc and 2 good buffers for $40, SC is reapired so a vluable item.

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

7 blinks

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

7 blinks

oh, well I guess next time you're online I'll see if we can pick our way though it.

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I guess this is progress. I have 3 less blinks than I started with. That's a 30% improvement. Lol

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

Oh, and a full list of every part you replaced may help too. There were a few things I had not considered on my board.

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I guess this is progress. I have 3 less blinks than I started with. That's a 30% improvement. Lol

yeah i was thinking at least 10 blink has changed. I'll have to have a re read of mine, was 6 went 7 but that may have been the shorted buffers

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

Q660 - rjk6026
q661 - rjp6065
q402 - 2pg011
q403 - 2pg011
q404 - 2pg011
q422 - 30g123
q423 - 30g123
q424 - 30g123
d865 - 8688

ic501 - m8707fp
ic521 - m8707fp