Troubleshooting
Many apparent failures with the 965AMS tester can be corrected
by simple procedures.
Symptom Cause Solution
Unit does not turn on Discharged battery pack. Charge battery pack.
NiMH battery pack old. Replace battery pack.
Screen goes blank Battery voltage low. Charge battery pack.
Dark lines across screen Battery voltage low. Charge battery pack.
Error Messages Battery voltage low. Charge battery pack.
Inaccurate results Battery voltage low. Charge battery pack.
Test lead broken. Replace test lead.
Improper connections. Check connections.
No results Test lead broken. Replace test lead.
Improper connections. See on-screen hookups.
Resistance <999 M7
when test leads open.
Test leads dirty. Clean test leads.
Error messages during
Self-Calibration.
Test Leads not shorted
properly when prompted.
Check connections.
Test leads broken. Check test leads.
If the above solutions do not fix the problem, the 965AMS tester
may need repair. Please make a note of the conditions when any
failure occurred and record any error messages that may have
appeared on the screen, then call 3M Telecom Repair Service at
1-800-426-8688 and select option 2 (in the US or Canada), or
call your local 3M representative in other countries for further
details on repair service.
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