Troubleshooting, Troubleshooting tables – Anritsu 682XXB User Manual
Page 190
5-24
682XXB/683XXB MM
±15VFM Supply Problems
This supply provides
±15 volts to the FM circuits.
Step 7.
Perform the following procedure to isolate malfunctions to
the
±15VFM supply and its outlying load circuit.
a.
Place the
LINE
switch to
STANDBY
.
b.
Replace the A15 PCB assembly.
c.
Place the
LINE
switch to
OPERATE
and measure the
±15VFM 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 A11 and A13 PCBs.
f.
Place the
LINE
switch to
OPERATE
and measure the
15VFM 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 on the
remove PCBs.
h. Place the
LINE
switch to
OPERATE
and measure the
±15VFM voltages.
i.
Continue steps g and h until the faulty PCB is located.
Table 5-6.
Error Messages 105 and 106 (6 of 10)
TROUBLESHOOTING
TROUBLESHOOTING
TABLES