VIVAX Imago LCD TV-3215

[kixo]

I'm trying to replace some resistors on power board from VIVAX Imago LCD TV-3215, but I can't identify them because they are badly burned.
They blew up after near lightning strike. Any advice on how to identify them?

Power board model: SLT689 VER:1.0
Resistors: R129B, R129C, R129D

Already searched the internet for schematics or board replacement, but with no luck. Perhaps someone has spare lying around?

[maxvalutech]

Re: VIVAX Imago LCD TV-3215

If you can find a clear enough image of that board on the net you can identify the resistors by their banding colours.

[budm]

Re: VIVAX Imago LCD TV-3215

May be you should stick to one thread instead of making two threads:
https://www.badcaps.net/forum/showthread.php?t=68086

All I can say is the total resistance will be less than 1 Ohms for the Source resistors that blew up for that STBY SMPS.
Did you check MOSFET Q11 to see if it has very low resistance between Source and Drain pin.
You also have bad caps on the cold side of the circuit.

[Andrew F. Ali]

Re: VIVAX Imago LCD TV-3215

If you can find a clear enough image of that board on the net you can identify the resistors by their banding colours.

These are SMD resistors...they will not have coloured bands but Numbers to identify their values.

[jetadm123]

Re: VIVAX Imago LCD TV-3215

It may be the angle, but don't a few of those filter capacitors next to the white connectors look a little swollen?

[budm]

Re: VIVAX Imago LCD TV-3215

I see at least 3 caps with bulging top, one has liquid leaking on the top too.
He should re-cap in both the cold side and in the HOT side but no need to replace the large main filter cap.

[kixo]

Re: VIVAX Imago LCD TV-3215

May be you should stick to one thread instead of making two threads:
https://www.badcaps.net/forum/showthread.php?t=68086

All I can say is the total resistance will be less than 1 Ohms for the Source resistors that blew up for that STBY SMPS.
Did you check MOSFET Q11 to see if it has very low resistance between Source and Drain pin.
You also have bad caps on the cold side of the circuit.

Thank you for quick response. I just checked the MOSFET and it has .5 Ohms between drain and source and it passes continuity test between all pins. (but I haven't desoldered it yet). Yes, 1000uF caps also look suspicious.

[budm]

Re: VIVAX Imago LCD TV-3215

So the MOSFET shorted out which means the SMP IC7 may be damaged also. Check the components between the GATE pin and the GATE drive output pin to see if those parts are OK or not.