Anritsu 682XXB, 683XXB 682XXB/683XXB MM 5-53/5-54

682XXB/683XXB MM 5-53/5-54
TROUBLESHOOTING
TROUBLESHOOTING TABLES
Step 5. Reconnect cable W108 to A5J4 and disconnect cable W121 at
A5J5.
Step 6. Using the oscilloscope, verify the presence of a 10 MHz TTL
signal at the end of cable W121.
If present, replace the A5 PCB.
If not present, go to step 7.
Step 7. Reconnect cable W121 to A5J5 and disconnect it at A4J7.
Step 8. Using the oscilloscope, verify the presence of a 10 MHz TTL
signal at A4J7.
If present, replace the cable W121.
If not present, go to step 9.
Step 9. Reconnect cable W121 to A4J7 and disconnect cable W105 at
A4J6.
Step 10. Using the oscilloscope, verify the presence of a 10 MHz TTL
signal at the end of cable W105.
If present, replace the A4 PCB.
If not present, go to step11.
Step 11. Reconnect cable W105 to A4J6 and disconnect it at A3J4.
Step 12. Using the oscilloscope, verify the presence of a 10 MHz TTL
signal at A3J4.
If present, replace the cable W105.
If not present, replace the A3 PCB.
Table5-27. ErrorMessage 148 (2 of 2)