Question for Budm (and everyone else) for fsp212-3f01 Power Supply

[Paul678]

Budm,

Are these your photos?

http://s807.beta.photobucket.com/use...F2180.jpg.html

And if so, was replacing Q7 and the ZD4 zener successful for you? These
two components were shorted out on my unit.

This site:

http://www.tv.quuq.org/index.php?ind...y_view&iden=74

....Also recommends replacing R65 5R1 smd, but this component measured
good on my board.

[budm]

Re: Question for Budm (and everyone else) for fsp212-3f01 Power Supply

Yes, that is my picture, it is the common failure for this power supply. Fixed many of them. It is setup as a linear regulator to supply the VCC for the 5VSTBY.

[andytv]

Re: Question for Budm (and everyone else) for fsp212-3f01 Power Supply

Hi, Just join the forum, great info. Glad I could found info. for my Viewsonic PS. Already replace the cap. and found (thanks to this thread) that in fact Q7 and the ZD4 are shorted out. I will replace Q7 with a 2N2222a but need confirmation on the Zener, 15V 1/2W zener ?????
Thanks.

[budm]

Re: Question for Budm (and everyone else) for fsp212-3f01 Power Supply

I use 1N4744 (1W) in my repair.

[andytv]

Re: Question for Budm (and everyone else) for fsp212-3f01 Power Supply

Thank you. Hopefully this should bring back to life the PS.

[andytv]

Re: Question for Budm (and everyone else) for fsp212-3f01 Power Supply

My old ... Viewsonic now working like a new one. Capacitors and replacement of Q7 and the zener diode solved the problem. Also had a problem with "leaking" color from the screen, (top left), similar to someone dragging their fingers on a fresh coat of paint. Problem also corrected, I guess problem was caused by the defective caps. Many thanks to this forum and specially to Budm, help greatly appreciated.

[12rounds]

Re: Question for Budm (and everyone else) for fsp212-3f01 Power Supply

hello gentlemen,
came across this thread while trying to finish repairing a fsp212-3f01 psu in a viewsonic n3251w; it has the only partial schematic of the psu that i have been able to find so far. I started with a dead totally dead tv - even after replacing all the visibly exploded electo caps. q7 and the adjacent zener brought the +5vdc portion back to life, giving me a red led on the front which will turn green when pushing the power button. My problem is that now i don't have the +12 and +24. Any thoughts as to where to start?
Thanks!