Re: Best Apple IIgs Monitor Solution?

[Michael J. Mahon <mjmahon@aol.com>]

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
>> 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
>> anything.   Always possible it's PCB has a R353 labeled without a
>> connector, but I'm not about to pop mine own to check.
>> 
>> 
>> 
>> 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
CRT. 

-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon