Spectre E325BV no power.

[Malachi]

I'm not getting any voltage at all on any pin on J28.
I can't find what I know is typically a fuse.
Is there anything I can check or just buy a new psu.

[dick_barton]

Re: Spectre E325BV no power.

Do you have a picture of the right hand side of the above photo showing the mains input side. Are there any components on the underside of the board at the mains input side?

[Pentium4]

Re: Spectre E325BV no power.

Maybe fuse is on the bottom? Strange. Post more top pictures

[Malachi]

Re: Spectre E325BV no power.

This is all there is to this tv.

[budm]

Re: Spectre E325BV no power.

https://www.badcaps.net/forum/attach...5&d=1460759162

Fuse F1 is on the bottom right of the picture, it has black shrink tubing over it.
Sceptre LK-PL320214E Power Supply / LED Board for E325BV-HD

http://www.shopjimmy.com/leke-lk-pl3...-led-board.htm

[Malachi]

Re: Spectre E325BV no power.

That's a fuse?
Thanks.

[budm]

Re: Spectre E325BV no power.

Yep.

[Malachi]

Re: Spectre E325BV no power.

It's not open. So that's not it. Considering a working psu is $18 including shipping, it's almost more convenient to replace it. If that's the problem.

It's got those good CapXon capacitors you guys rave about.

[budm]

Re: Spectre E325BV no power.

Do you have any DCV on CN7 black connector? DCV on the main cap?
Check the Diode BD1, BD5 too.

[dick_barton]

Re: Spectre E325BV no power.

Why don't you try and repair it and advance your servicing skills. There's plenty of help on the forum as you know.
If it's not the fuse then what voltge do you get across the two pins of the large capacitor 100uF, 450V

[Malachi]

Re: Spectre E325BV no power.

I would like to try and repair it since if I mess it up a new one is cheap. But I have to know what to look for.
I will put it back in and check he voltage on the large cap.

[dick_barton]

Re: Spectre E325BV no power.

Help from the Forum should be able to guide you through a possible repair. There are some very knowledgeable people on here that leave me in their wake.

[jetadm123]

Re: Spectre E325BV no power.

Hint: additional clues that it's a fuse are what's stamped on the board:

1) F1 The letter "F" usually indicates a fuse.

2) T3.15/250V Slow Blow 3.15A fuse.

[budm]

Re: Spectre E325BV no power.

I would like to try and repair it since if I mess it up a new one is cheap. But I have to know what to look for.
I will put it back in and check he voltage on the large cap.

You can run the board by itself without having other board hooked up. You should have 5VSB at all time.
Check the diode BD1, BD5, also see if you have any DCV between the two legs of the main filter cap.
It can be just bad startup cap EC1, but those caps in the secondary side should be all replaced once you get it running.

[Malachi]

Re: Spectre E325BV no power.

171V on the large capacitors, no voltage on CN7 anywhere.
Diodes read 298 with the meter on diode mode. I have no idea what that means though.

[Malachi]

Re: Spectre E325BV no power.

No voltage of any kind on CN5.

[budm]

Re: Spectre E325BV no power.

171V on the large capacitors, no voltage on CN7 anywhere.
Diodes read 293 with the meter on diode mode. I have no idea what that means though.

That is find, the diodes are no shorted out, BTW, those two diodes are for the 5VSTBY.
So you do have B+ to run the SMPS. You might as well check all other diodes mounted on the heatsink.
Also try heating up cap EC1 with hair dryer to see if you will get the 5VSTBY if all other diodes are OK.

[Malachi]

Re: Spectre E325BV no power.

Ok, thanks. What should I check next?

[dick_barton]

Re: Spectre E325BV no power.

What is the number printed on the IC on the underside of the board marked as IC1

[budm]

Re: Spectre E325BV no power.

I edited post 17.