Vesel PSU on JVC TV PL807 connector?

[int0x13]

My TV model is:
TV JVC LT-32DF7BC
Input 220-240V 50Hz 180W
Country: FRANCE
Power supply model: 17pw15-8 WITH PL807 connector
Picture on my initial board (failing): http://i.imgur.com/zkzjwHD.jpg
Picture on the board i've bought: https://spares2repair.co.uk/images/t...2020231546.jpg
Schematics of the board:https://cdn.badcaps-static.com/pdfs/...3e2e0f880d.pdf
Hi,
I wanted to repair the a vestel PSU of the JVC TV, but after replacing the 2 cap C878 and C877, the tv still failed randomly at start. When it's starting your dont hear any buzzing on the PSU board wheras you hear a buzzing hissing sound when it cannot start and the Power led stays RED and it's rebooting in loop. I tried to locate the buzz sound, i'm not sure, but i think it's coming from a transformer on the PSU board. The top right one. Anyways, as i failed to repair the initial board, i bought the whole board on ebay, but discovered that the board is not the same, it has not the PL807 connector as my initial board. I have the full schematics of the board, so tried to understand why there is a PL807 connector on some board and not on others. But i still dont understand. The voltage present on this connector are all present on other connector except the 2.5V one. Currently i dont have the TV at hand because i'm in hollydays. Do you know if my tv would start without the PL807 connector plugged? And do you know what's the purpose of the connector? and why some board have it and others not?
Thank you.
If you wonder, the PL807 connector is white and located near others connectors at the bottom of the board.

[dick_barton]

Re: Vesel PSU on JVC TV PL807 connector?

So you need to use the power supply which has not got PL807 connector fitted?

If all the other connector voltages match and it's just PL807 that's missing then I would check PL807 pins 1 to 7 to see that they have the correct voltages which I would think it would, except the 2.5V would be missing.

If you were to solder in diodes D840 & D841 then you should have your 2.5V.

I would then unsolder PL807 connector and move it across to the replacement power supply.

[int0x13]

Re: Vesel PSU on JVC TV PL807 connector?

I cannot send it back i think. The seller on ebay wont accept it. Hes from uk btw.
But i think ill try to sell this board because it will be useless because it doesnt have this PL807 connector. I think at 90% that the tv wont work without connector related wires plugged in. The seller or anybody cant confirm though. But it seems logical.
So i wont bother to unsolder resolder diodes and connector because im nor even sure it would work: ill just buy the correct board with that damn connector fitted.
But i still wonder why vestel did such a thing: a board with same reference with 2 différents versions!

[sordids999]

Re: Vesel PSU on JVC TV PL807 connector?

I would test voltages on the power supply first just in case it's not the power supply at fault

[diif]

Re: Vesel PSU on JVC TV PL807 connector?

I'm with dick, swap the connector and add the diodes.
The same board with different versions is to save money. The board will be used in different sized TVs.