viewsonic 32in lcd tv power supply broken

alain28 · Joined: 27 Jan 2008 Posts: 32 Location: France

jryduke, first please try to be registered.
see
http://pagesperso-orange.fr/alain.mionnet/enii3210j.htm

For U702 I think better to replace by schottky diodes but if you want a
N3856VAG....
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AM

France

jryduke · Joined: 22 Jan 2009 Posts: 1 Location: Texas, USA

Alain28, Thanks for your reply. I am registered and I had already seen your webpage with the photos of the power supply. But you still did not tell me what U401 is. No matter what I do about the circuitry around U702 - the supply will not work unless I can identify and repalce U402.
Jryduke

Guest · Posted: Sat Feb 07, 2009 3:00 am Post subject: many thanks

Hi all

Many thanks for your info in this thread.
My 3260w went off with a bang and visible spark last week, I took a look inside and sure enough C33 was literally in pieces. I ordered the full replacement power unit from Ramplus (as listed in this thread) , bolted it in, and my TV is alive again.

Many many thanks

Very Happy

Guest · Posted: Mon Feb 16, 2009 7:52 pm Post subject:

I have the FSP228-3F01 that is also dead, my C33 looks fine but C20, 21, 22 and 28 are about to pop.everything else on the bord looks fine. Is there a specific problem that causes these cape to expand? what do I need to replace to correct this issue?

Thanks

edzbox · Joined: 27 Dec 2008 Posts: 3

edzbox · Joined: 27 Dec 2008 Posts: 3

alain28 · Joined: 27 Jan 2008 Posts: 32 Location: France

alain28 · Joined: 27 Jan 2008 Posts: 32 Location: France

The less reliable part in electronic is electrolytic capacitor...
Some china product could have quality trouble.
But this can also for good product.(ELNA should be)
except that for electrolyte leakage
http://pagesperso-orange.fr/alain.mionnet/enR3265_3271.htm

an other example:
http://pagesperso-orange.fr/alain.mionnet/enSME03.htm
capacitor manufacturer? (I don't take care)

example where it is metal trouble on potmeter trimmer pins!
http://pagesperso-orange.fr/alain.mionnet/enSME03.htm
but fews monthes before it was an electrolytic capacitor trouble

Products are older.
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AM

France

alain28 · Joined: 27 Jan 2008 Posts: 32 Location: France

tomm · Joined: 05 Jun 2009 Posts: 2

Hi.

after reviewing this site and topic this seems to be the place for the right answers. I hope someone can help me out.
I have a power supply problem in that a P.O. replaced the orig. FSP204-2F01 in a Viewsonic N2750w with a different model FSP204-2F02 by cutting the orig. wire harnesses and terminals CN2 and Cn3 and hard wiring each lead directly to the new board. i wish to verify the work as everything works on the tv except CCFT`s wont light up... inverter has checked out O.K.
can any one give me a list of pinout/wire color code for the orig. FSP204-2F01 CN2 and CN3 to their proper harnesses ?
I guess some detailed pictures would work if allowed by this site.
also If someone has rewired a N2750w to accept FSP204-2F02 I could use the same info or pictures.
even a picture of an in situ orig. power supply hooked up to the wire harnesses would be very helpful.
I have tried FSP and Viewsonic and no replies have been forthcoming.
Its really too bad the P.O. didnt see this site. the orig. PSU seems in decent shape except where he ripped out the orig. CN2 and CN3 terminals. maybe a good look at the PSU would have meant not ripping everything up.
but now its time to make up for past mistakes.

any help is greatly appreciated

Tomm