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Re: Best Apple IIgs Monitor Solution?
Tempest <reichert2084@gmail.com> wrote:
> On Sunday, January 6, 2013 2:19:50 AM UTC-5, Michael J. Mahon wrote:
>> Tempest <reichert2084@gmail.com> wrote:
>>
>>> On Saturday, January 5, 2013 8:34:22 PM UTC-5, nyder wrote:
>>
>>>> On Saturday, January 5, 2013 5:09:15 PM UTC-8, Tempest wrote:
>>
>>>>
>>
>>>>> I scoured that schematic and I can't find R353 which is supposedly the
>>
>>>>> V Position adjust. It's got to be there, but maybe it's not on the
>>
>>>>> schematic for some reason?
>>
>>>>
>>
>>>>
>>
>>>>
>>
>>>> Ya, I did a search also, didn't see it. Tried to find the data info on
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>>>> the TA 7664 CP chip that does all that stuff, but couldn't find one
>>
>>>> (Found a TA7644 BP that does video, but it's didn't see anything in it).
>>
>>>>
>>
>>>>
>>
>>>>
>>
>>>> I will swear I've heard of this being possible, but I didn't find
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>>>> anything. Always possible it's PCB has a R353 labeled without a
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>>>> connector, but I'm not about to pop mine own to check.
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>>>>
>>
>>>>
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>>>>
>>
>>>> Sorry i couldn't be of more help.
>>
>>>
>>
>>> I'll ask over on the Amiga board, maybe they'll know?
>>
>>
>>
>> Many monitors have two magnetic rings with projecting tabs on the rear of
>>
>> the deflection yoke.
>>
>>
>>
>> Adjusting one tab relative to the other changes the amount of lateral shift
>>
>> and turning both together changes the direction of lateral shift. These are
>>
>> called "centering magnets" and they are used to center the raster on the
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>> CRT.
>>
>>
>>
>> -michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon
>
> I'm not sure I want to go as far as messing with the centering magnets,
> but I suppose I could as a last ditch effort.
They seldom need readjustment, but that's what they're for. It should take
about a minute once you open the case and get the raster displayed.
-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon