User`s guide

If, adjusting Horizontal Hold does not fix the problem, you will probably
need to remove the case. For starters, this will let you squirt some Control
Cleaner into the HH control.
With the case removed, you will have access to some other controls which
may help solve the shimmy problem. Two are on the black High Voltage module: one
nub controls base Intensity; the other controls Focus. There are also a couple
small tab switches located near the back edge of the main circuit board. One
sets Horizontal position; the other sets Vertical position.
If you reconnect the side controls and power cord, you will be able to
experiment with adjustments.
Working with monitor adjustments with the case removed requires constant
awareness of potential hazards. For example, you would connect the AC power cord
to the monitor _before_ plugging it into an AC socket. The monitor needs to be
on a plastic or wooden table with nearby clutter removed. It may be easiest to
support with the rear of the circuit board resting on a thick magazine.
You should have one or two plastic TV technician tools. These are rods with
ends for turning slotted controls. (A whole set will cost a few dollars at
Radio Shack.) Such tools are handy for adjusting the controls on the back of
the HV module, for flipping the tab switches, for tapping components you suspect
may be loose, etc..
Note: If the HH control seems to have serious burn spots-- e.g. you notice a
crunchy feel when turning the knob-- you may have to get it replaced in order to
achieve a correct setting. Replacing such a control is a job for someone with
experience in working with monitors or TV's. If you decide to do it, be sure to
check safety and setup suggestions listed earlier. De-solder the control, remove
it, and take it to an electronics parts seller to get a replacement.
Working with Horizontal Hold, the Horizontal tab switch, and the Intensity
control on the HV module, (and, maybe, the Focus control and Vertical Size) you
should be able to eliminate any shimmy and end up with a properly sized and
positioned display.
Note: On some monitors, you may have to trade-off Vertical Size in order to get
a stable display which retains good linearity.
Once the shimmy problem is cured and the display is the right size and
positioned correctly, work back and forth between the side controls and Focus to
get a sharp display.
======= End of Monitor Repair Mini-Manual =========