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From: rubywand@aol.com
Newsgroups: comp.sys.apple2
Subject: Re: GS monitor adjustment help needed
Date: 19 Nov 1996 16:52:59 GMT
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In article <56qiru$p2q@ns2.qnis.net>, sjensen@ns.qnis.net (Steve Jensen)
writes:

>
>My picture on my GS monitor needs to be lower.  There is an empty
>space at the bottom of the screen. Can you tell me which pot will
>adjust this when I open the case? ....
>


     If diddling the rear controls does not completely solve the problem,
then, the following (from James Poore) may help:

<<
    Color monitors do vertical and horzontal centering differently than do
monochrome monitors.  Almost all color monitors have either a jumper
arrangement or actual centering controls, sometimes both.
If your monitor has a jumper, there should be 3 tabs that the jumper can
be connected to.  For vertical adjustment the tabs should be marked as
'up',
'down', and center.  If your pix is too high, then you would connect the
jumper to the down tab.  For horizontal adjustment the three tabs should
be marked 'left', 'center', and 'right'.  If your monitor has centering
controls, then adjust for best centering.  Also centering controls are
usually located on the PCB with no access holes, so the back will most
likely have to be removed to get to them.
>> 


     Probably, your GS monitor uses little 3-position 'tab switches' which
can be reached from the rear of the main circuit board. One of the
switches should set vertical position.

     As you say, you will need to remove the case. You will need to unplug
the cable going to the side-mounted controls and, then, once the case is
off, remove the side-mounted controls from the case and reconnect to the
circuit board to do the adjustments.

     This is kind of a hassle; so, while the case is off, you may want to
check the Focus and Intensity settings (slotted shafts on the black HV
module). Also, this is a good chance to dunk your case in a sink of soapy
water.


NOTE --> Be sure to wear goggles/ work on a non-conductive table surface/
have a fat magazine ready to support the circuit board/ avoid stressing
the CRT neck/ stay away from the HV anode lead (plugged into the back of
the CRT) and avoid touching the back of the CRT. 
 


Rubywand