Troubleshooting, Troubleshooting tables – Anritsu 682XXB User Manual
Page 189
682XXB/683XXB MM
5-23
±15VLP Supply Problems
This supply provides
±15 volts to the Pulse Generator and the Refer-
ence, Coarse, Fine, and YIG Loop circuits.
Step 6.
Perform the following procedure to isolate malfunctions to
the
±15VLP supply and outlying load circuits.
a.
Place the
LINE
switch to
STANDBY
.
b.
Replace the A15 PCB assembly.
c.
Place the
LINE
switch to
OPERATE
and measure the
±15VLP voltages per Table 5-7.
G
If the voltages are correct, the problem is cleared.
G
If the voltages are incorrect, go to step d.
d.
Place the
LINE
switch to
STANDBY
.
e.
Remove the A3, A4, A5, A6, and A7 PCBs.
f.
Place the
LINE
switch to
OPERATE
and measure the
±15VLP voltages.
G
If the voltages are correct, go to step g.
G
If the voltages are still incorrect, contact your local
ANRITSU
service center for assistance.
g.
Place the
LINE
switch to
STANDBY
, then install one of
the removed PCBs.
h. Place the
LINE
switch to
OPERATE
and measure the
±15VLP voltages.
i.
Continue steps g and h until the faulty PCB is located.
Table 5-6.
Error Messages 105 and 106 (5 of 10)
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