Re: IIgs RGB monitor repair question.

[Stephen Shaw <stephen@apple2.org.invalid.za>]

On Sun, 02 Jun 2002 11:39:07 GMT, Mark Cummings wrote:

> I have two monitors doing exactly that over a 10-30 minute period. What
> happens is the Screen and Focus voltage are increasing beyond their normal
> value. Even adjusting the EHT transformer Screen and Focus down doesn't
> solve the problem completely. You might be able to get the Screen voltage
> about right to give the right brightness, but the Focus will be out of
> range causing a fuzzy screen. You could try that if you take appropriate
> precautions.
> I believe the fault is in the EHT transformer itself, but have yet to
> proove it. I have one good monitor that I hope to swap parts with to proove
> it, but havn't got time at the moment. I have replaced lots of components
> in mine that were a bit out or damaged, but the fault stayed the same.
> I have not found a source of those EHT transformers anywhere. As far as I
> can tell they are not available. I have tried Mitsubishi and Apple in
> Australia without success.
>

Try HRDiemen or Konig. Google should find them. If you quote the number/s that
appear on your fbt/lopt they should be able to give you a match.

> Mark
>
>
> "Rob" <roberta@inreach.com> wrote in message
> news:R2hK8.39503$0A2.31767@rwcrnsc54...
>> Anyone know what would cause a IIgs RGB monitor to slowly increase in
>> brightness\contrast?  What components may be bad?
>> When it's first turned on the display looks normal but as it warms up the
>> brightness and contrast slowly increase to the point where it's too
> bright.
>> I even have the brightness and contrast dialed all the way down.
>>
>>
>> -Rob
>>
>>

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