Monitor repair

From: jpero_at_pop.cgocable.net <(jpero_at_pop.cgocable.net)>
Date: Fri Sep 25 12:49:22 1998

> Date: Fri, 25 Sep 1998 12:28:17 -0400
> Reply-to: classiccmp_at_u.washington.edu
> From: allisonp_at_world.std.com (Allison J Parent)
> To: "Discussion re-collecting of classic computers" <classiccmp_at_u.washington.edu>
> Subject: Re: Monitor repair

> < I have the same monitor. Don't have the same problem, though. It may b
> < just the picture tube warming up, which would explain why the chill spra
> < doesn't do anything. Although 10 minutes seems like an awfully long tim
> < for tube warm-up. Mine gets to full size, and warmed up in about 15
> < seconds. It's from 1992 (or93).

Snip!

>
> My first thought was power supply but any point I've measured is stable
> on warm up.
>
> Allison
>
Hi! Dropping in to offer info while still hunting the problem in the
Tobishi monitor and cleaning those horrible glue.

For this width changes on warmup, that's not normal and all of my
monitors are around that age _at_3 to 5 years in age and doen't have
this problem besides aging tubes.

That growing width on warmup is in horizontal width area and
pincushion, any iffy powering off the flyback. Check those 1%
resistors for drifts, check many capacitors too.

Jason D.

I'm not sure if my email server is working right...see if that comes
out to your netherlands at all... thanks!
email: jpero_at_cgocable.net
Pero, Jason D.
Received on Fri Sep 25 1998 - 12:49:22 BST