Troubleshooting
6–40
TDS 340A, TDS 360 & TDS 380 Technical Reference
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
Figure 6–27?
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
Figure 6–28?
Replace the Main
board.
Yes
No
Does
pin 7 of J901 have
a signal with the same
levels as Figure 6–26?
Is
pin 1 of J2
on the LVPS
module at
15 V?
Replace the Low
Voltage Power Supply
module.
Figure 6–25: Monitor troubleshooting procedure
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