Bad transformer

[selldoor]

Re: Proscan 32LA30Q.

Please can anyone help this guy out

Good day guys,

I am looking for a schematic/ service manual for a Proscan 32LA30Q. I especially need the schematic for the PSU. Board number SBGD-200-3HP.
Any help in this regard will be highly appreciated.
Regards

[nomoresonys]

Re: Bad transformer

Ok

i found a transformer and soldered it to the board.tv works great now.that little trans former had a pri.,sec.,and a aux.i changed f1 to a fast blow just for piece of mind,and i soldered a fuse holder on bottom of board .the fuse that was on the board was hard wired on,and it had no value on it. Think it acted like a jumper and killed mt trans coils. Thanks again every one.

ok

[selldoor]

Re: Bad transformer

ok

Good day guys,

I am looking for a schematic/ service manual for a Proscan 32LA30Q. I especially need the schematic for the PSU. Board number SBGD-200-3HP.
Any help in this regard will be highly appreciated.
Regards

[nomoresonys]

Re: Bad transformer

and I don't care how old the thread is, my friend fixed his tv, and I said NICE FIX.

[nomoresonys]

Re: Bad transformer

Wonder if you actually read the thread? It was NOT a TRANSFORMER
it was an inductor.

It is an old thread was only kicked as pretorif is looking for a schematic

Anyone else reading this see above - pretorif looking for a schematic.

YEP read the whole thread.

[nomoresonys]

Re: Bad transformer

I found a transformer and soldered it to the board.Tv works great now.That little trans former had a pri.,sec.,and a aux.I changed F1 to a fast blow just for piece of mind,and i soldered a fuse holder on bottom of board .The fuse that was on the board was hard wired on,and it had no value on it. Think it acted like a jumper and killed mt trans coils. Thanks again every one.

I READ THIS, what did you read????

[selldoor]

Re: Bad transformer

if the data sheets match on both transformers, shouldn't be any problems, NICE FIX.

Wonder if you actually read the thread? It was NOT a TRANSFORMER
it was an inductor.

It is an old thread was only kicked as pretorif is looking for a schematic

Anyone else reading this see above - pretorif looking for a schematic.

[nomoresonys]

Re: Bad transformer

I found a transformer and soldered it to the board.Tv works great now.That little trans former had a pri.,sec.,and a aux.I changed F1 to a fast blow just for piece of mind,and i soldered a fuse holder on bottom of board .The fuse that was on the board was hard wired on,and it had no value on it. Think it acted like a jumper and killed mt trans coils. Thanks again every one.

if the data sheets match on both transformers, shouldn't be any problems, NICE FIX.

[pretorlf]

Re: Bad transformer

Good day guys,

I am looking for a schematic/ service manual for a Proscan 32LA30Q. I especially need the schematic for the PSU. Board number SBGD-200-3HP.
Any help in this regard will be highly appreciated.
Regards

[orgasmotron]

Re: Bad transformer

where did you found you inductor , i have the same problem as you , and can you tell me
what's the part number on the 16pin IC , mine is scratch out from factory
thank's

[budm]

Re: Bad transformer

Especially that, the so called transformer that he asked is not transformer but inductor and is part of the PFC Voltage booster circuits, he better check his DC voltage on the main cap to see what he is getting.

[tom66]

Re: Bad transformer

You... found... a transformer? Just any old transformer? Put it in and it worked?
That is like saying, my Ford's car engine is broken, but I found an engine from a Toyota, and it worked.

[splitcrete]

Re: Bad transformer

I found a transformer and soldered it to the board.Tv works great now.That little trans former had a pri.,sec.,and a aux.I changed F1 to a fast blow just for piece of mind,and i soldered a fuse holder on bottom of board .The fuse that was on the board was hard wired on,and it had no value on it. Think it acted like a jumper and killed mt trans coils. Thanks again every one.

[budm]

Re: Bad transformer

Also circle the one with open winding.
Also pictures of the back side of the board.

[selldoor]

Re: Bad transformer

The wires on the pri.side are burned off.

What exactly did you mean by this?

How about a clear infocus picture of the bottom of the transformer.
Try in better light.

[budm]

Re: Bad transformer

That is PFC choke which is in series with the MOSFET to ground. You can see the MOSFET and the PFC Diode mounted on the same heatsink as the Main bridge rectifier. It will have only two windings, one is for the PFC booster, another one is for Phase detection (not all PFC uses Phase detection through the winding, so it may have only one winding)).

[tom66]

Re: Bad transformer

Looks like varnish to me, nothing to worry about.

What else is in series with the transformer? Other than the MOSFET...

[retiredcaps]

Re: Bad transformer

This may not be the case, but I saw one youtube video sometime last year where there was a thermal fuse inside the secondary windings of the transformer. Yes, I realize the OP is talking about the primary side in this thread.

See

https://www.badcaps.net/forum/showthread.php?t=18051

[splitcrete]

Re: Bad transformer

I have more pics.And yes I'm changing all the caps most were bad.

[splitcrete]

Re: Bad transformer

If more pics are needed I can post later today.