5-20 682XXB/683XXB MM
TROUBLESHOOTING
TROUBLESHOOTING TABLES
Step 2. Perform the following procedure to isolate malfunctions
when the voltages from several regulated supplies are
incorrect.
a. Place the LINE switch to STANDBY.
b. Replace the A15 PCB assembly.
c. Place the LINE switch to OPERATE and measure the
regulated voltages per Table5-7.
If the voltages are correct, the problem is cleared.
If the voltages are incorrect, go to step d.
d. Place the LINE switch to STANDBY.
e. Replace the A18 PCB.
f. Place the LINE switch to OPERATE and measure the
regulated voltages per Table5-7.
If the voltages are correct, the problem is cleared.
If the voltages are still incorrect, contact your local
ANRITSU service center for assistance.
Step 3. Run self-test again.
If no error message is displayed, the problem is cleared.
If error 105 displays again, contact your local ANRITSU
service center for assistance.
Table5-6. Error Messages 105 and 106 (2 of 10)