Re: Panasonic TCP50G20 4 Blinks



I did all of the resistance measurements on page 43 & 44 of the manual and did NOT pick up any shorts. Am I supposed to do anything else?...

Re: Panasonic TCP50G20 4 Blinks

I had to take some time out to do some other chores, back at it again and I am more confused than ever. Before I start spending money on board repair or replacement or repair, I decided to go back to step 1 and do one more check. In doing so, I found out that I screwed up when I did the testing the second time. When testing for short or low resistance on Vsus, Vda, and P15 V (slide 8), I checked the P11/Brown at the WRONG CONNECTOR. I tested it at connector P2 instead of P11. I was doing it from memory and messed up. Long story short, I tested resistance...

Re: Panasonic TCP50G20 4 Blinks

Do you mean the resistance tests in the troubleshooting manual?

Re: Panasonic TCP50G20 4 Blinks

I don't think I would attempt a repair myself, but I will study it further. If I don't do the repair, I'll have to find someone to do it. Are there any recommended vendors for doing board repairs? If I have the SC fixed, will there be other boards that need attention, or is it typically limited to the SC board?

Re: Panasonic TCP50G20 4 Blinks

I am really impressed with the knowledge and helpfulness of the people in this forum. This is my first time attempting a TV repair, and your help has been invaluable! I couldn't find Q661 on the SC board, so I went back to the beginning and did all of the procedures in the manual again. I noticed that one of the leads on my meter was not fully inserted so I thought I'd better recheck everything.

In checking for shorts on Vsus, P15V and Vda, I found a dead short on the P15V (Connector P11/Brown pin#4). I then went to the detailed procedure...

Re: Panasonic TCP50G20 4 Blinks

I went back and followed all of the troubleshooting steps outlined in the troubleshooting manual provided by Malachi (thanks for the manual!). There were no shorts found looking at the Vsus, Vda, or P15V using the test methods on Slide 8 of the manual. From here, I went to Slide 27 and did the steps there. Unplugged SC 20 and had 4 blinks. Tested voltage at pin 9 of P7 with TV turned on and had 3.1 V. According to the flowchart I need to replace the P board. Does everyone agree? Anyone see something I might have missed?

Has anyone been...

Re: Panasonic TCP50G20 4 Blinks

If I disconnect the SC board and apply power (plug in power cord and press on/off button), the blinks go to 7. I put an ohmmeter across SC2 with no power applied and I am NOT picking up a dead short. There is some resistance there. Where do I go from here??

I am trying to troubleshoot my TCP50G20. It will not power on and has a fault light blinking 4 times. I have read this is probably the P board, but MAY be the A board. When I turn on the TV, the relay clicks and then about 20 seconds later they click again. At the second click, the 5V on the goes dead. It seems like there is a protection circuit shutting down the power. Any ideas on how to further troubleshoot this problem? This is my first time posting here, and any help is very much appreciated!

Re: Panasonic TC-P50G20 Problem

I have a TCP50G20 that has 4 blinking lights. According to what I have read, it is probably the P board, but may be the A board. Any suggestions on how to pinpoint the cause??