Troubleshooting Techniques; Identifying The Problem; Testing The Assembly - Agilent Technologies 75000 Series Service Manual

Troubleshooting
Techniques
Identifying
the Problem
Testing the
Assembly
Heat Damage
Amplifier Configuration
Amplifier PCA
4-2 Service
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To troubleshoot an Agilent E1446A problem, you should first identify
the problem, and then isolate the cause to a replaceable part.
Amplifier problems can be divided into three general categories:
•
Operator errors
•
Catastrophic failures
•
Performance out of specification
Operator Errors
Apparent failures may result from operator errors. See Appendix B in
the Agilent E1446A User's Manual for information on operator errors.
Catastrophic Failure
If a catastrophic failure occurs, see "Testing the Assembly" to
troubleshoot the amplifier.
Performance Out of Specification
If the amplifier fails any of its Performance Tests, check test equipment
and connections, then repeat the test. If the amplifier continues to fail
one or more of the Performance Tests, the module may need to be sent
in for exchange.
You can use the tests and checks in Table 4-1 to isolate the problem.
See Figure 3-1 in Chapter 3 for locations of replaceable parts.
Table 4-1. Agilent E1446A Tests/Checks
Test/Check Reference Designator
- - - - - - - - - -
A1SP301
A1F201 - A1F206
A1J701 - A1J702
A1J901 - A1J902
A1J1001
A1P1 - A1P2
Check:
Discolored PC boards
Damaged insulation
Evidence of arcing
LADDR setting
(factory set to 88)
Fuse continuity
Damaged connectors