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4.13
VIDEO DRIVE ADJUSTMENT
a.
Prior to Performing the video drive adjustment, the
Color Temperature adjustments must be proper.
b.
Set the Brightness control (VR691) to produce a
blank (dark) screen.
c.
Set the three Contrast controls (VR101, VRlll and
VR121) on PCB-VIDEO-SUB to the center of their
ranges.
d.
Adjust the Gain control (VR292) on the front panel
to obtain maximum useable highliqht brightness.
e.
Observe the highlight color and adjust the three
Contrast controls (VRlOl, VRlll and VR121) to obtain
white (colori highlights.
4.14
G2 AND FOCUS ADJUSTMENT
a.
Turn the G2 control (VR371) on PCB-CRT fully counter
clockwise and Brightness control on front nanel
fully clockwise.
b.
Adjust G2 control to just produce a faint raster.
c.
Adjust the Brightness and Gain controls for a normal
display.
d.
Adjust the Focus control (VR591) on the Focus Pack
for best overall focus, observing both the center
and corners of the screen.
e.
Adjust Dynamic Focus control (VR504) on PCB-DEFL to
obtain uniform focus.
f.
Repeat step d and e if necessary.
4-12
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