Re: IIgs Monitor Repair

[Polymorph <polymorph69@hotmail.com>]

On Jan 9, 1:10 am, ferd...@gmx.de wrote:
> Something else: It looks like you have found the problem so stick to
> it. The problem is extremely likely to be with the focus/screen pots.
> You should concentrate on this. There is only one cap which could
> affect brightness, bot it would not affect focus and it would only be
> able to REDUCE the brightness. The HV divider can usually not be
> replaced, you'd have to replace the whole flyback assembly, which
> can't be done at reasonable cost, if at all.
> But there are other possible fixes:
>  - turn the pots back and forth very rapidly (10 times or so) . After
> that, turn the monitor on with SCREEN at minimum and readjust.
>  - live with it (perhaps set up the focus with a warm monitor)
>  - leave the case off (not a good idea for your daughter...)
>  - install a cooling fan
>  - drill two holes into the case to allow adjustment from the outside
>  - attach an external divider.

Thanks for your tips Ferdinand, I'll most definately give them a try.

It looks likely that I will be able to source another Amiga monitor in
the next few days, so if I do I will decomission the AppleColor and
spend some more time trying to get it working 100%.

I think I may send the old Amiga monitor (the one that died
originally) to the monitor home in the sky, as I don't think its worth
the effort/cost in fixing, especially if I can get a cheap
replacement. I may spend a little more time on it looking for anything
obviously wrong, but other than that, I think it will go.

By the way, it has become pretty obvious during the course of
performing this repair that the Apple II Monitor FAQ may require some
revising. As I stated in an earlier post, one of the suggested
solutions to a problem sounding very much like mine was to replace the
filter capacitors. Now, it would seem that performing this action
would do very little to fixing this problem (as I found out the hard
way). Does this sound like a fair comment, or is it just that my
problem was a little different from the "normal" problems associated
with this monitor?

Maybe with some agreement from you experts, we could have it revised
to include some alternative solutions. This will probably be more and
more relevant as time goes on, as more and more monitors will begin to
fail.

What do you think?

Thanks,
Mike