User manual

Table 4-1. Agilent E1460A Common Problems
Problem
Type Symptom
Possible
Solutions
Self-test Errors Non-zero error code in response
to the *TST? command.
• See Table 2-1 for information on
self-test errors.
Operator Errors Non-zero error code in response
to the SYST:ERR? command.
• See Appendix C of the Agilent
E1460A User’s Manual for
multiplexer errors and causes.
• See Appendix B of the
Agilent E1405 User’s Manual or
Agilent E1406 User’s Manual for
additional information on
operator errors.
Catastrophic
Failures
Not responding to commands.
• Check logical address setting.
• Check GPIB cables and
connections.
• See “Testing the Assembly” in
this chapter.
Performance
Out of
Specification
Failing Closed-channel
Resistance Test (see Test 2-1 in
Chapter 2).
• Check user wiring and test
connections.
• Replace relays that correspond
to the channels that are failing
(see Table 4-3).
• If most of the channels are near
or above the test limit (3.5 Ω),
replace the entire printed circuit
board (Agilent part number
E1460-66502).
Failing DC Isolation Test
(see Test 2-3 in Chapter 2).
• Check user wiring and test
connections.
• Remove dust from relay module
and terminal module printed
circuit boards.
50 Service Agilent E1460A Service Manual