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Troubleshooting
Maintenance
6Ć40
No
No
Yes
No
Yes
Yes
No
Use this procedure to
troubleshoot display
problems.
Is the
display legible
but the horizontal
and/or vertical
display not
stable?
Is
pin 10 of
J901 at
+15 V?
Yes
No
Does
pin 2 of J901
have a signal
similar to
FigureĂ6Ć25?
Replace the
Monitor module.
Power off the oscilloscope
and disconnect the cable from
J901 on the Monitor module.
Turn the power back on.
Yes
Does
pin 5 of the cable
have a signal similar
to FigureĂ6Ć26?
Replace the Main
board.
Yes
No
Does
pin 7 of J901 have
a signal with the
same levels as
Figure 6Ć24?
Is
pin 1 of J2
on the LVPS
module at
15 V?
Replace the Low
Voltage Power
Supply module.
Figure 6Ć23:ăMonitor Troubleshooting Procedure