Sansui - san2701 (hd tv) Australia

[Amraks]

Symptoms: not even turning on(ex. no lights)

Dismantled it and found allot of bad capacitors with the top exploded and allot of discharge on the board and a few scorch marks around heat sink.

8x ksd 25v 2200uF 105% (some leaky others where buldged)

6x ksd 10v 1000uF (some leaky others buldge, 1 normal)

1 ksd 16v 1000uF (fine)

What should I replace these with (higher volt capacitor?) and will any of the other stuff on the board need replacing?


Thank you hope I have made stuff clear, I'm new to this kinda stuff.

[retiredcaps]

Re: Sansui - san2701 (hd tv) Australia

What should I replace these with (higher volt capacitor?) and will any of the other stuff on the board need replacing?

Start with replacing ALL the electrolytic capacitors regardless if they are bloating or not (including all the little ones). Stay with the same uF and voltage. Make sure the replacement caps fit the diameter and height restrictions that you may have with tight spaces.

Members here like Panasonic FR or FM series (low ESR caps which are required for a SMPS) for replacements. If neither are available as the 1st choice, then go to Panasonic FC series.

[Amraks]

Re: Sansui - san2701 (hd tv) Australia

Ok thank you. will this thread stay open so if I have more problems I can just use this one.

Also I will look at getting some better pictures. Phone ones aren't making the cut.

[retiredcaps]

Re: Sansui - san2701 (hd tv) Australia

Ok thank you. will this thread stay open so if I have more problems I can just use this one.

All the threads stay open here.

Also I will look at getting some better pictures. Phone ones aren't making the cut.

Don't bother. We can see the bulged caps. Replace all the caps and retest. Chances are that is all that is required.

[Amraks]

Re: Sansui - san2701 (hd tv) Australia

I'm wanting to know what these rubber capacitor looking things are. They are round and have radial leads but they are attached to the side of the cylinder not the bottom like a capacitor and are insulated with a rubber tube.
I'm wondering about the polarity because I pulled on out thinking it was a cap, does it matter or will I need to work out that.
on the circuit board it had a squiggly line.

Cheers in advanced

[kaboom]

Re: Sansui - san2701 (hd tv) Australia

For the record, that thing's a Funai.

Do not confuse "Sansui in retired name" with the Sansui of G-33000/881/8080/4000 fame.

[Amraks]

Re: Sansui - san2701 (hd tv) Australia

what u mean the tv says Sansui. I'm in Australia .

[bbjunkie]

Re: Sansui - san2701 (hd tv) Australia

I'm wanting to know what these rubber capacitor looking things are. They are round and have radial leads but they are attached to the side of the cylinder not the bottom like a capacitor and are insulated with a rubber tube.
I'm wondering about the polarity because I pulled on out thinking it was a cap, does it matter or will I need to work out that.
on the circuit board it had a squiggly line.

Cheers in advanced

Sounds like an inductor, but perhaps you could post a picture to be sure.
Most inductors have the circuit legend L and a number beside them.

Most inductors don't have polarity and can be fitted either way. The exception are those with more than two terminals, these are tapped and it is important they are refitted as removed.

[Amraks]

Re: Sansui - san2701 (hd tv) Australia

its a inductor thank you sir. so it won't matter which way I put it.

Now just waiting on 3 more caps from the usa.

snap mount capacitors will still work on a board won't they?

[tom66]

Re: Sansui - san2701 (hd tv) Australia

No need to replace the inductors, they rarely fail.

You cannot use snap mount capacitors. You need normal radial lead capacitors.

[Amraks]

Re: Sansui - san2701 (hd tv) Australia

where can i find these 450WV, 100UF?

or could I use a normal 450V 100UF cap?

Trying to find out what it means in google.

[Amraks]

Re: Sansui - san2701 (hd tv) Australia

Have just answered my own question.
WV = Working Voltage if Im correct?
And wouldn't matter would it.

[tom66]

Re: Sansui - san2701 (hd tv) Australia

where can i find these 450WV, 100UF?

or could I use a normal 450V 100UF cap?

Trying to find out what it means in google.

Oh, for those - you may be able to use a snap-in. It depends if the holes are big enough to accommodate them.

They rarely fail, so you often don't need to replace them.

They are 450WV = 450 volts working. You must not decrease this. The bridge rectifier on the power supply converts 230Vac to 325Vdc, which the PFC boost stage then steps up to around 380 - 420Vdc.

Often you can use a general purpose capacitor here.

[Amraks]

Re: Sansui - san2701 (hd tv) Australia

So how can I be sure that I can use just a normal old capacitor with same rating but doesn't have "WV" but has "V".
I'm replacing capacitors.
But these aren't bulged up like the rest on the board but I think they may be leaking from bottom

[tom66]

Re: Sansui - san2701 (hd tv) Australia

So how can I be sure that I can use just a normal old capacitor with same rating but doesn't have "WV" but has "V".
I'm replacing capacitors.
But these aren't bulged up like the rest on the board but I think they may be leaking from bottom

Only replace them if the TV doesn't work after the secondary capacitors are replaced.

99% of the time, the big caps don't fail. They are under far less stress than the other capacitors. Your problem is most likely those smaller capacitors as they are the most critical.

WV and V are the same.

[Amraks]

Re: Sansui - san2701 (hd tv) Australia

Ok it all works now.

Thank god thats out of my road.

now I have room for other stuff to work on.

[Amraks]

Re: Sansui - san2701 (hd tv) Australia

Thanks for your help everyone

[Amraks]

Re: Sansui - san2701 (hd tv) Australia

Well just over two years this lasted now a Disc Capacitor has just gone and died.

We heard a POP.

Anyone know what I can replace the disc capacitor with?

its a 151 1kv...

I am unsure what the 151 means and the 1kv means.

Any help to make this tv last until the screen dies would be good.

[Amraks]

Re: Sansui - san2701 (hd tv) Australia

150pf

1000v

Is this what that code means??

[philliesfan30m]

Re: Sansui - san2701 (hd tv) Australia

yes