I need a schematic for Viewsonic P220f model VCDTS21692-1M.
If you have one for sale send me a message.


Mike

Mike wrote:
I need a schematic for Viewsonic P220f model VCDTS21692-1M.
If you have one for sale send me a message.


Mike


It's pretty likely one is not even available unless you're an authorized
service center.

What's wrong with the monitor? These have a few specific problems that
happen with almost every one of that model.

In article 7AWrf.8472$7P2.7971@trnddc07,
James Sweet wrote:

Mike wrote:
I need a schematic for Viewsonic P220f model VCDTS21692-1M.
If you have one for sale send me a message.


Mike


It's pretty likely one is not even available unless you're an authorized
service center.

What's wrong with the monitor? These have a few specific problems that
happen with almost every one of that model.

Is one of those problems that it eats LM2412 video amplifiers? I
repaired one by replacingtha and a couple of nearby transistors and some
arc protection diodes. It seemed to be working fine, but it lasted only
a few hours before the smoke came out of the new 2412. All power and
other voltages were nominal, and essentially identical to those on
another, good P220f.

Isaac

Is one of those problems that it eats LM2412 video amplifiers? I
repaired one by replacingtha and a couple of nearby transistors and some
arc protection diodes. It seemed to be working fine, but it lasted only
a few hours before the smoke came out of the new 2412. All power and
other voltages were nominal, and essentially identical to those on
another, good P220f.

Isaac



Replace the 4N35 optoisolator in the power supply, these almost always
fail but you'll be chasing your tail forever trying to track it down
without knowing that as it's intermittent. On one I had, I had to resort
to soldering in some wires to an old benchtop DMM monitoring the voltage
to the vertical output IC and use it like that for several weeks before
I caught it creeping up. I hit parts with freeze spray until I got to
the opto and the voltage dropped right back down the instant I cooled
that part. I've fixed at least half a dozen 17, 19 and 22" models with
the same basic chassis by replacing that stupid opto. Usually it takes
out the vertical output IC but I've seen other things blow up.