Electronics Forum / Repair / August 2008

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I have a Samsung HLN467WX/XAA that the picture freezes to black and white
snow after about 15 minutes of being on.  When it freezes the power,
channel, menu, and volume buttons do not function.  The sound continues to
work, and it will eventually turn off the lamp and allow the ...

This is the same set I posted about before, I fixed the coolant leak but
the set still has some major vertical output problems (probably a result of
the spill), so at this point it's clear I'm going to need the service
manual. Just thought I'd see if anyone here had one they ...

I'd be grateful if someone could give me some clues as to where to go
next with a dead Philips VCR (VR750) SMPS.
The PSU died when the mains dropped to 30-60v for about half an hour
(in the UK so it should have been around 230v) before going away

Hi may someone tell me how to make a car

Replaced a drive belt in the tape deck of a mini music system, Wharfedale
NE571 , easier said than done. When received, and as used by the owner, the
display is very feint even at the optimum viewing angle. You view it through
a mirror finnish of the cassette carrier flap. All ...

The rotary encoder in my Wavetek 75 arbitrary waveform generator is
physically broken, and it's impossible to hook anything up to the broken
legs to probe the specs.
I'm totally new to encoders and I'd appreciate if anybody can offer any

Can anyone tell me if there is a cheap and simple device I can use t
record the level of power spikes/sags on my mains supply?
We're having all sorts of weird problems with UPS boxes triggerin
server shutdowns and other pieces of equipment inexplicably resettin

I thought I had repaired this Dell W3000's power supply , but
after about 20-30 minutes the power light goes out (no video or audio)
and the power light comes back on (sound and video returns for a sec.).
IOW, the power goes off and then back on. Over and over again with a few

AND KADAITCHA MAN'S HAMSTER LOSES THE FIGHT AND KADAITCHA MAN OWES NICOLE
BISCHOFF AND CURTIS BROWN A LOT OF MONEY SO KADAITCHA MAN TAKES THE HAMSTER
TO THE BATHROOM AND PUTS IT IN THE TOILET AND TAKES A DUMP ON IT AND FLUSHES
THE HAMSTER DOWN THE TOILET.

What's that green sh.t in the URL on secure sites? I never saw an
explanation of it.

More CD player shenanigans....
I still haven't gotten round to measuring the voltages in the Audio
Alchemy CD player...but I promise to do so soon!
But in the meantime, I have another question, about another CD

I need help getting help, finding a replacement board, or even finding
the schematic for an AOC (A42HD84) Plasma tv.  I believe the main
power supply board (Samsung, LJ44-00092C) is the problem.
When I got the TV there was a blown fuse on the board.  See some pics

8 year old TV.  Nice picture.
Began displaying a brighter line about 5 inches from the bottom
occassionally but the picture was otherwise OK.
I doubted my ability to track that down and let it go.

I'm now the proud owner of an unused LCD monitor that won't power up.
After doing some research, one finds that -- in the case of Viewsonics
-- the problem often gets traced to a faulty power supply.
After prying open the 12v, 3.8amp box, it appeared that the three-