Anritsu 682XXB - Manual (Page 219)

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.
G If present, replace the A5 PCB.
G 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.
G If present, replace the cable W121.
G 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.
G If present, replace the A4 PCB.
G 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.
G If present, replace the cable W105.
G If not present, replace the A3 PCB.
Table 5-27. Error Message 148 (2 of 2)