I got a Panny 54" tv. The P board is faulty. I'm getting 4 blink code. The guy thought he could fix it. He bought a P board from myshoptvs, whom I've never heard of. Says ok on the board. I know it's not ok. I'm getting 85v on a heat sink. Ya it hurt. Should a source on a mosfet be shorted to the heatsink? I'm thinking not since I get 85v from the heatsink to ground. The part of the P board is ETX2MM807ASH. The part number on the mosfet is MIP3E5MY. Man my finger hurts.
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Tc-p54g20
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Re: Tc-p54g20
Getting voltage on primary heatsinks is normal.
4 blinks is typically an SC or SS board fault on these - isolate the SC and SS board. If you get a 6, 7 or 8 blink code you know it is an SC or SS fault.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Tc-p54g20
Heya Tom,
Well I'll be. I finally got voltage on P2 and P11. I hooked up P35 a and P6 and I get a steady voltage out. I have been testing it with just P7 hooked up. Apparently I can't do that.
What would cause the voltage to turn off after a few seconds with the SN and SC boards disconnected? A fail safe? I did power it up with everything on and the SC board smoked.Last edited by dcapper; 05-17-2014, 02:31 PM.
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Re: Tc-p54g20
It will power off with SC (or SN) / SS out because of the SOS6-7-8 trip. With no power the boards will fire off a few error codes causing your problem.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Tc-p54g20
Originally posted by tw2005 View PostIt's a 12th gen G20 series FHD with a SOS 4, PSU did not fix and a smoking gun, I mean smoking TNPA5081 Sc board.
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Re: Tc-p54g20
Originally posted by dcapper View PostHehe. I thought for sure it was the PS. But wow there is a lot of threads of the TNPA5081. I'm going to suck it up and drop $150 on another one. Looks like the repair kit doesn't always fix it. Anyway I can get the voltage to stay on so I can adjust the levels?
Lucky he remembered my post and realised before he powered it up and found he had missed the shorted 30F125 transistors and fitted a new TC7SH14F neither are included, but both fail. Definitely the IC. Finding shorted IGBTs is a no brainer, that's the easy bit.
Not sure how you'll go now , getting it to smoke.Last edited by tw2005; 05-17-2014, 03:08 PM.
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Re: Tc-p54g20
Originally posted by dcapper View PostTell me about it. Would the SC taken out any of the buffer boards?
I have had one with shorted upper and lower buffers which took out a new SC.
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Re: Tc-p54g20
Panasonic sc tnpa5081 rebuild
https://www.badcaps.net/forum/showth...=26322&page=11
https://www.badcaps.net/forum/showth...ght=vfo&page=3
post 58, a table I did from my good boards before we found the guide.
Turned out to be fairly accurate too which I was glad about.
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Re: Tc-p54g20
Well I got the board back from Moduslink and it was a really nice job. The tv fires up normal but up close I can see lots of green pixels. There is 9000 hours on the tv, so I thought it shouldn't do that. But since there is no voltage adjustments on the boards I'm at a loss. I have 194v leaving the power supply. I'm assuming that is correct since there is no sticker to tell me different on the panel and the service manual doesn't say. Has anyone gone through the service menu and played with settings? I don't want to screw the tv up. It says to put the Vsus on high. I did that and no change. What I find funny is when I'm in the service menu the picture in the background is fine. When I leave I get the green dots, so I know it's fixable. Any ideas?
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Re: Tc-p54g20
All I can tell you is my 50" runs Vsus at 203-204V. At 9000hrs I guess bad caps are a possibility but I'm yet to have an issue with panasonic panel. I think only my PZ800 is close to that in time. Others are sub 5000 hrs.
There's nothing in the service menu I know of except Vsus High/Low.
Most likely a trim adjustment on the PSU for Vsus , probably would not touch any others, Tom may know more with voltage levels, I've never really had the need to change any.
Only a P42X20 I fidddled to see what would happen but that has a much bigger issue.
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Re: Tc-p54g20
Originally posted by dcapper View PostYou are so helpful. I'll adjust the power supply voltage a little. I find it odd that when I'm in service mode, the green dots are gone. I thought you could adjust the picture in service mode?
What happens there?
Is this the only G20 series you have? swap the A board?
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