Troubleshooting
Turn the Scale Illumination
control while watching the
CRT.
Measure the voltage on the
center pin of each of the
control potentiometers.
Check for the voltages below
while rotating the controls.
Readout
0
to
+S.2V
Focus
0 to
-S.2V
Intensity 0 to +S.2V
Adjust the
Trace Rotation
while watching the CRT display.
Disconnect the cable to
J80
on
the
A2
Display
Control board.
Disconnect the cable to
J84.
Perform the front
panel troubleshooting
procedure to check the
supply voltages.
Disconnect the cable
to
J82 on the A2 Display
Control board. Measure
the voltage on pin 1
while varying the
Trace
Rotation.
Replace the A63 Power
Supply module.
Perform the A62 Front Panel
Module Troubleshooting
Procedure.
Replace the
A2
Display
Control board.
Figure 6-25: A2 Display Control Board Troubleshooting Procedure
6-48
Maintenance
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