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MAINTENANCE
2.
Adjust the OUTPUT VOLTAGE control (Rl4) for an output of
+52 Vdc +/- 0.1 Vdc.
CAUTION - Overvoltage Adjustment
DO NOT adjust the OVERVOLTAGE ADJUSTMENT
control
(R21).
It is preset at the factory.
3.5.2
Video Module
l.
Remove the video input cable from
the
rear
panel
BNC
connector.
2.
Set the BIAS control (R609) fully clockwise.
3.
Turn up the BRIGHTNESS control (rear
panel)
until
the
raster is visible on the screen.
4.
Turn BIAS control
counter-clockwise
until
the
raster
brightness starts to increase.
Leave at this setting.
5.
Reconnect the video input cable.
3.5.3
Deflection Module
3.5.3.l
Cutoff Preset (G2 Voltage) -
l.
2.
3.
4.
Remove the video input cable from
connector.
Set the BRIGHTNESS control (rear
or to the point where the raster
Adjust the CUTOFF PRESET control
where the raster disappears.
Reconnect the video input cable.
3.5.3.2
Horizontal Frequency ·
the
rear
panel
BNC
panel) to its midrange,
becomes visible.
(R434)
to
the
point
1.
Run the VCBOl diagnostic and select
the
ALIGN
section
(subsection 3.3.1.1):
a.
b.
c.
d.
Enter console mode.
Load the MICROVAX DIAGNOSTICS
drive
1.
Enter:
>>>
B/10
DUAl<RETURN>
Load the MICROVAX DIAGNOSTICS
drive 2.
3-24
2
of
3
diskette
in
3
of
3
diskette
in
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