Apple Macintosh Performa 577 - Manual (Page 151)

Adjustments Geometric Distortion - 30
Geometric
Distortion
Before you begin, remove
the rear housing.
±
Warning:
This product
contains high voltage and a
high-vacuum picture tube.
To prevent serious injury,
review CRT safety in
Bulletins/Safety.
WARNING:
High Voltage Areas
Adjustment
Controls