1960 SERVICE MANUAL
F) DEGAUSSING
Degaussing is required when poor color purity appears on the screen.
This monitor uses an automatic degaussing circuit that is activated at
power ON. Automatic degaussing will be fully functional within 15
minutes.
The degaussing effect is confined to the picture tube since the coils are
mounted at the back of the tube. Should any part of the chassis or cabinet
become magnetized, it will be necessary to degauss the affected area with
a manual degaussing coil.
Manual Degaussing
a. Apply line voltage to the degaussing coil and move it in a rotary
motion over the front, sides, and top of the monitor. The coil should
be kept away from the rear of the monitor to avoid damaging the
magnetic neck components.
b. Slowly rotate and back the coil away from the monitor to about 6 feet
beyond the point where no effect on the CRT will be noticeable.
For proper degaussing, it is essential that the field be gradually reduced by
moving the coil slowly away from the monitor. The degaussing coil must
never be shut off or disconnected while near the monitor, as this would
introduce a strong field instead of cancelling the effect of the stray fields.
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