Troubleshooting, Troubleshooting tables – Anritsu 682XXB User Manual
Page 188
5-22
682XXB/683XXB MM
±15VA Supply Problems
This supply provides
±15 volts to the Function Generator, PIN Control,
ALC, FM, and Analog Instruction circuits.
Step 5.
Perform the following procedure to isolate malfunctions to
the
±15VA 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
±15VA 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 A8, A9, A10, A11, and A12 PCBs.
f.
Place the
LINE
switch to
OPERATE
and measure the
±15VA 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
±15VA voltages.
i.
Continue steps g and h until the faulty PCB is located.
Table 5-6.
Error Messages 105 and 106 (4 of 10)
TROUBLESHOOTING
TROUBLESHOOTING
TABLES