Panasonic Viera 65" 7 blinking lights

[Hoosier2014]

Re: Panasonic Viera 65" 7 blinking lights

Thanks for getting back with me. I decided to troubleshoot this problem on my own for now. I ordered the SC jig just to be sure I am following your instructions correctly. While I wait, are there any tests I can run? Also, I have the original SC (recall I purchased a new one which I installed), are there tests I can run on the board while it is sitting on my workbench?

I also need to buy a new SU board. Do you recommend buying or trying to fix? Buying may be quicker, do you know a reliable place where I can buy one?'

Last question: I have a craftsman multimeter but there are multiple settings. If I'm check voltage, do you know which DC setting I need it on? 600, 200, 20, 2000m, or 200m. I realize this is probably just moving decimal points, but I could use some help here as well as with the ohms settings. Feel free to send me to a help link that explains all of this.

Thanks,

John

[Hoosier2014]

Re: Panasonic Viera 65" 7 blinking lights

I purchased the SC jumper and isolated the SU/SD boards together following the service manual. I continue to have the 7 blinking lights which suggests that the SC board is bad. Like I mentioned before, I replaced the SC board with one from panasonic and after I installed the TV came to life only with the horizontal bars running across the screen. I turned off and reset the buffer cables. I turned on the unit and got the 7 blinking lights.

Assuming I damaged the SC board, I hoping to find out how to go about resistance testing the transistors. Since I now have two bad SC boards, maybe I can use some working parts for ones that are damaged. Please let me know where you would start and how I can go about it. The transistors are three pronged and I'm unsure where to test and what resistance I should get. Thanks. Always feel free to point me to a resource I can study. Hoping someone can help me out.

[Hoosier2014]

Re: Panasonic Viera 65" 7 blinking lights

Anyone, Anyone? You guys have gotten me this far, don't give up yet!

[Hoosier2014]

Re: Panasonic Viera 65" 7 blinking lights

Needing help troubleshooting bad transistors. Take the board off, or keep in place and check? Should I check any voltages? Just looking for some help guys.

[tw2005]

Re: Panasonic Viera 65" 7 blinking lights

I'd work with the board out.

Start off using continuity test looking for shorted out parts. Start with the heatsinked components. Q locations are transistors, D are diode and the legs A anode, K cathode.

The likelihood of making one from two would be very slim I would expect.

You could search tnpa5081 and maybe get some ideas from those rebuilds i did as the S2 is the same generation and the cct designs are very close.
parts used may be same too but straight up q661 is a RJP56F4A where on mine RJP63F3A.

Difference there would be 560V IGBT to a 630V IGBT

I would expect surface mounted components to be failed too, so can you manage to desolder / solder small multipinned items?

Modus was the best option when the sale was on, which is no longer.

Still is the safest way to get this going again.

Something to try to be sure there's no A board issues, disconnect Sc2,SC20,SS11, P35, 3 white ribbons at the A board and see if the TV turns on with no blinks.

Turn off and leave those power cables disconnected for several minutes before you hook them up again so nothing gets spiked.

This will confirm that the A is not causing 7 blink which I would not expect but slim chance it may.

[Brandx]

Re: Panasonic Viera 65" 7 blinking lights

I'm having a similar problem with TC-P50G10. I'd love to get some help.

[tw2005]

Re: Panasonic Viera 65" 7 blinking lights

I'm having a similar problem with TC-P50G10. I'd love to get some help.

try using search "TC-P50G10". plenty to read, SC failure is fairly common.

start your own thread

[ljintexas]

Re: Panasonic Viera 65" 7 blinking lights

In my experience, the SU/SD buffers are what damaged the SC board. Thanks to careful testing before installing my repaired SC board, I was able to indentify the buffer boards as shorted and replaced them both.
Many Thanks to TW2005 and Tom for their assistance!