Service manual

Troubleshooting
Techniques
There are two main steps to troubleshoot an E1411 multimeter problem:
(1) identify the problem, and (2) test assemblies to isolate the cause to a
user-replaceable component.
Identifying
the Problem
Multimeter problems can be divided into four general categories:
• Self-test errors
• Operator errors
• Catastrophic failures
• Performance out of specification
Self-Test Errors
An error number (1, 2, 3, or 4) is returned when the multimeter self-test
fails. If a self-test error occurs, recycle power and repeat the self-test. If the
error repeats, see "Testing Assemblies" to troubleshoot the multimeter.
Table 8-2 shows some typical causes of self-test errors.
Table 8-2. Self-Test Errors
Error Description Typical Causes
1
2
3
4
Multimeter does not respond to
self-test
Invalid communication between A1
and A2 processors
Data line between multimeter and
mainframe failed
Invalid communication between
multimeter and mainframe
. Bad connections/settings
. Incorrect operation
. Hardware failure (exchange)
. Bad A1/A2 communication
. Hardware failure (exchange)
. Bad connections/settings
. Incorrect operation
. Hardware failure (exchange)
. Bad connections/settings
. Incorrect operation
. Hardware failure (exchange)
Operator Errors
Apparent failures may result from operator errors. See Appendix B - Error
Messages in the E1326A/E1411A User’s Manual or the E1326B/E1411B
User’s Manual for information on operator errors.
Catastrophic Failure
If a catastrophic failure occurs, see "Testing Assemblies" to troubleshoot the
multimeter.
56 Service Agilent E1411A/E1411B Service Manual