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From: root@abulafi.UUCP (Gregor Bautz)
Newsgroups: comp.sys.atari.st.tech
Subject: > Adjusting the SM124
Message-ID: <136@abulafi.UUCP>
Date: 1 Mar 91 10:35:18 GMT
References: <27C8984D.9979@ics.uci.edu> <chuck.667486801@mrcnext>
Lines: 53


You have to open the monitor. I've found an article in an old STmag which
discribes how to dow it: Get some plastic screwdrivers (metal would cause
some induction). On the main board you'll find some potentiometers and one
adjustable inductor (plastic drivers) . They have numbers on it, and i'll
give you a short explanation:

VR 602 (V.Size)  for the total height

L 702 (H.Size)   for the total horizontal size

VR 603 (V.Line)  for vertical picture distortion
                 (trigger only, when objects on the edge of the screen
                  (upper/lower edge) aren't ok, but in the middle)
L 703 (H.Line)   for horizontal picture distortion

VR 601 (V.Hold)  for a 'standing' picture 
                 changing this poti will cause the picture to run from
                 upper to lower edge

VR 701 (H.Center) to center the picture horizontally on the screen

VR 703 (Focus)   ATTENTION! High Voltage (600V) this is for the sharpness
                 of the picture

VR 702 (Sub Bright) this is the default value for the brightness, don't change
                  it.

Last some hints:
  mark the initial value with a marker
  notice every steps you're doing

Have fun!
Gregor

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                       _        |  root@abulafia.UUCP
       /       /      /         |  gregor@cip-s01.informatik.rwth-aachen.de
  __  /       /  __  -  , __    |  gregor@tornado.north.de
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-------------------------------------------------------------------------------
'Abulafias Chochmath ha-Zeruf war gleichzeitig Wissenschaft von der Kombination
der Lettern und Wissenschaft von der Herzensreinigung'.  (Foucaultsches Pendel)