My Panasonic recently went out and had a 6 blink code. Per the manual, 6 blink code means SS, SC, SU or SD board. It turns on, shows no picture blinks 6 times then turns off. I read the most common issue is the SC board so I purchased one and switched them out but the TV went from a 6 blink code to a 7 blink code. The manual states that is an issue with the SU SD or SC board. I'm wondering why it went from 6 to 7. Did I buy a bad SC board or is it just the SU SD? Is there any tutorial I can use to test the SC board? I have a multi meter but pretty new to this stuff.
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Panasonic TC-P50G10. 6 blinks to 7 blinks.
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Re: Panasonic TC-P50G10. 6 blinks to 7 blinks.
Test the su and sd boards this way:
Remove the 2 screws from them to the sc board.
Take a paper plate and slip it in betwine the sc and the board youre testing.
Put your meter in continuity mode( beep when probes touch).
Put a probe, dont matter which one, on the metal tab of a screw hole.
Take the other probe and slowly rake across the pins of the flat ribbon connectors. Flip up the tab to test the back side.
If you hear a beep the su or sd you are testing it has failed. It has a short on the ic chip.
If this is not clear enough to follow, there are videos on buffer board testing on youtube.
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Re: Panasonic TC-P50G10. 6 blinks to 7 blinks.
Assuming you installed everything correctly you may have got a bad replacement SC. Sometimes SC2 connector doesn't show a short but check Q661 for shorts between any of its pins. Good idea to do this on any replacement board before even installing it. If there's any faults Q661 will show it.
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Re: Panasonic TC-P50G10. 6 blinks to 7 blinks.
Wow, unusual on your old board to have a fault not originating with Q661 but Q441 shorted explains why it was 6 blinks as that is part of the energy recovery circuit. Not sure why your new board is doing SOS7. Double check everything is connected right including reseating the ribbon from the A board - make sure it's in all the way.
You can isolate the SC board from the SU/SD by disconnecting the three black connectors to them and removing the four big screws that join them to the SC, then short the two pins of the jumper point SC50 together using a hard disk jumper or something else. You can power it up that way and see if it stays on or still does a blink code. Don't run it for long like that. Also note that there's a little cap near the SU/SD board that can hold about 100V for ages after powering it up like this. I got bitten by it a few times.
If still doing a blink code you need to start testing voltages on the sc board.
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Re: Panasonic TC-P50G10. 6 blinks to 7 blinks.
I would also check the power supply board, as many times it happens that SC board failures take out a fuse and maybe some transistors on the power supply.
I don't remember the SOS circuitry right now, but I imagine that in case of no power supply to the SC board, the SOS acts as SC failed or is missing, hence SOS7.
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Re: Panasonic TC-P50G10. 6 blinks to 7 blinks.
Originally posted by tn245 View PostWow, unusual on your old board to have a fault not originating with Q661 but Q441 shorted explains why it was 6 blinks as that is part of the energy recovery circuit. Not sure why your new board is doing SOS7. Double check everything is connected right including reseating the ribbon from the A board - make sure it's in all the way.
You can isolate the SC board from the SU/SD by disconnecting the three black connectors to them and removing the four big screws that join them to the SC, then short the two pins of the jumper point SC50 together using a hard disk jumper or something else. You can power it up that way and see if it stays on or still does a blink code. Don't run it for long like that. Also note that there's a little cap near the SU/SD board that can hold about 100V for ages after powering it up like this. I got bitten by it a few times.
If still doing a blink code you need to start testing voltages on the sc board.
Originally posted by WildPuppy View PostI would also check the power supply board, as many times it happens that SC board failures take out a fuse and maybe some transistors on the power supply.
I don't remember the SOS circuitry right now, but I imagine that in case of no power supply to the SC board, the SOS acts as SC failed or is missing, hence SOS7.
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Re: Panasonic TC-P50G10. 6 blinks to 7 blinks.
Did you take out the 4 screws for the bufferboards, un latch the 3 black connectors, and short the 2 pins at sc50 , then turn on?
If the tv stays on and the green led on the sc board stays lit the sc board is good. Only run it like this for 30 seconds MAX.
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Re: Panasonic TC-P50G10. 6 blinks to 7 blinks.
Originally posted by tvtimmy View PostDid you take out the 4 screws for the bufferboards, un latch the 3 black connectors, and short the 2 pins at sc50 , then turn on?
If the tv stays on and the green led on the sc board stays lit the sc board is good. Only run it like this for 30 seconds MAX.
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