DEC VR260 Monitor Problem

From: Geoff Roberts <geoffrob_at_stmarks.pp.catholic.edu.au>
Date: Wed Aug 30 02:25:11 2000

----- Original Message -----
From: <healyzh_at_aracnet.com>
To: <classiccmp_at_classiccmp.org>
Sent: Wednesday, August 30, 2000 2:29 PM
Subject: DEC VR260 Monitor Problem


> The only indication of output is on the middel 2/5th's of
> the screen, there is a strip across it. Playing with brightness and
> contrast doesn't seem to help any. More disturbing disconnecting the
video
> cable doesn't seem to cause any change either.

Partial vertical collapse. For a start anyway.
Not familiar with the circuit, but likely culprits are electrolytic
capacitors in the vertical output stage,
or possibly the vertical output transistors themselves.

> The only thing I'm sure about is that the VCB01, cable and VR260 all
worked
> when I stuck them in storaage about 3 years ago.

Sounds like dried up caps. Id the vertical stage, and change all the
electrolytics in the area.

cheers

Geoff Roberts
Computer Systems Manager
Saint Mark's College
Port Pirie,
South Australia
geoffrob_at_stmarks.pp.catholic.edu.au
netcafe_at_tell.net.au
ICQ: 1970476
Received on Wed Aug 30 2000 - 02:25:11 BST