Riddled TV Repair Forum

khnitz · Joined: 11 Feb 2009 Posts: 17 Location: Johnsburg, IL

Make: Panasonic
Model: TC-P65S1
Description: 65" Plasma, Manf. Jan-2010

The TV did not power on anymore. After pressing the power button on the unit, there would be a first relay click, then a second (and the cooling fans would start spinning). A second later there would be another relay click (the fans turn off) and a last click and then the front power LED begins blinking steady (1s on, 3s off). I replaced the stressed large 'lytics on the MULTI and SUS power boards (3X - 350uF 450V, and 3X - 1200uF 220V). The replacement caps are 390uF 450V, and 1200uF 250V - new Nichicon parts rated, like the originals, at 105C.

After replacing those stressed 'lytics, I am still getting the same behavior (power up, then off, and the steady, 1-blink LED). I see no signs that the screen is powering up (I'm more familiar with LCD sets, than plasma, but there's no action on the screen during this power up/down process).

I have the service manual for the unit, and am familiar with electronics repair and troubleshooting. The service manual provides no guidance for a steady 1-blink state...it seems to be the universal "you're screwed" indicator Razz

The only measurement I've taken so far was to see that (between test points TP5 and TP6 on the SUS power board), the Vsus rail climbs to about 185V before the shut-off.

Any help is appreciated...I'd like to get this running for the kids to enjoy at Christmas.

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khnitz · Joined: 11 Feb 2009 Posts: 17 Location: Johnsburg, IL

After some more information gathering and measuring of outputs from the power supply boards, I'm ording up a replacement A-board and will roll-the-dice with that. Should have further results by week's end.

khnitz · Joined: 11 Feb 2009 Posts: 17 Location: Johnsburg, IL

This TV is FIXED and ready for the kids to enjoy over the holidays! I replaced the A-board and it is now working. With the new, large electrolytics on the power supply boards, too, this one should hopefully serve my family for a long time to come.

kuhurdler · Joined: 28 Dec 2006 Posts: 2879 Location: Overland Park, KS

well done. Thanks for posting back.

khnitz · Joined: 11 Feb 2009 Posts: 17 Location: Johnsburg, IL

You're welcome!

It's the right way to pay-it-forward, I think.

I regularly search the web and enthusiast forums for answers with repairs or projects. But, that only works when people follow-through and post solutions to the questions or problems they've posted. It helps grow the knowledge base for the next person searching on that issue.

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