Sony xbr65x900c sound yes, no backlight or image.

[nomoresonys]

Re: Sony xbr65x900c sound yes, no backlight or image.

Nothing labeled fs that I can see on top of board, there's some labeled fb, should I rip it out and check bottom of board, that's where I have the tiny resistors reading short.

[nomoresonys]

Re: Sony xbr65x900c sound yes, no backlight or image.

I'll rip the board back out and report all shorts.

[Diah]

Re: Sony xbr65x900c sound yes, no backlight or image.

Nothing labeled fs that I can see on top of board, there's some labeled fb, should I rip it out and check bottom of board, that's where I have the tiny resistors reading short.

yes Fb. my typo. i dont thnk you have short.. its much open circuit at primary because the main fuse didnt blow up since yours Main filter caps blowing out. i think R.J are good at this part to follow. hope he join and help you

[nomoresonys]

Re: Sony xbr65x900c sound yes, no backlight or image.

Looks like about 6 tiny resistors are reading short, one near D950A, D950A reads good. There's 5 tiny resistors around D901 and IC901 reading short, the labels on the resistors that I was able to read were 3R3, 3R6, 4R4Z as far as my eyes can tell, don't have 20/20 vision any more, thanks.

[nomoresonys]

Re: Sony xbr65x900c sound yes, no backlight or image.

Ok, checking fb, thanks.

[Diah]

Re: Sony xbr65x900c sound yes, no backlight or image.

3R3, 3R6, 4R4Z are fuseable R low Ohm. they are not short.

[nomoresonys]

Re: Sony xbr65x900c sound yes, no backlight or image.

All fb on top of board show continuity.

[nomoresonys]

Re: Sony xbr65x900c sound yes, no backlight or image.

3R3, 3R6, 4R4Z are fuseable R low Ohm. they are not short.

Oh, ok, thanks.

[nomoresonys]

Re: Sony xbr65x900c sound yes, no backlight or image.

Dam that's a relief, I couldn't change those out, too tiny.

[Diah]

Re: Sony xbr65x900c sound yes, no backlight or image.

free the legs of the MOFSET under the heatsink. then test .. it could be one are open.

[nomoresonys]

Re: Sony xbr65x900c sound yes, no backlight or image.

Can you see the label on that mosfet, the number, is it Qxx something?

[nomoresonys]

Re: Sony xbr65x900c sound yes, no backlight or image.

Oh crap, did you mean all of them? big job.

[Diah]

Re: Sony xbr65x900c sound yes, no backlight or image.

Oh crap, did you mean all of them? big job.

start with the 2 close to the IC and main filter cap place.. by the way which value of filter cap you bridge to the boards?

[nomoresonys]

Re: Sony xbr65x900c sound yes, no backlight or image.

two of the 450 v, 220uf.

[Diah]

Re: Sony xbr65x900c sound yes, no backlight or image.

two of the 450 v, 220uf.

the original was 2x110 uf, it mean 1 x220uf enough

[nomoresonys]

Re: Sony xbr65x900c sound yes, no backlight or image.

dam those mosfets are in deep, can I just clip a leg and check or do I need all the legs out of circuit? if so does it matter which single leg I clip? thanks.

[nomoresonys]

Re: Sony xbr65x900c sound yes, no backlight or image.

the original was 2x110 uf, it mean 1 x220uf enough

Wasn't sure if I needed to put 2 caps back in so I replaced the 2 570v 110uf with the 2 450 220uf, you think that's messing things up?

[Diah]

Re: Sony xbr65x900c sound yes, no backlight or image.

Wasn't sure if I needed to put 2 caps back in so I replaced the 2 570v 110uf with the 2 450 220uf, you think that's messing things up?

yes 100%

[nomoresonys]

Re: Sony xbr65x900c sound yes, no backlight or image.

Should I take one out, if so can I just test with the one still in and nothing in the other spot? thats what I wasnt sure about, thanks.

[Diah]

Re: Sony xbr65x900c sound yes, no backlight or image.

Should I take one out, if so can I just test with the one still in and nothing in the other spot? thats what I wasnt sure about, thanks.

the 2 original caps are connected together at - and + so the value of 2x 110uf = 220uf. so 1x220uf will be enough, take one out and leave the other on correct position of - & +