Service manual

Troubleshooting
To troubleshoot a switch module problem you must first identify the
problem and then isolate the cause of the problem to a replaceable part. See
Chapter 3, "Replaceable Parts," and the component locators at the back of
this manual for descriptions and locations of Agilent E1463A replaceable
parts.
Identifying the
Problem
Table 4-1 lists some common problems, along with symptoms and possible
solutions. If the problem persists, perform component-level troubleshooting
using the component locator and schematics.
Table 4-1. Agilent E1463A Common Problems
Problem
Type Symptom
Possible
Solutions
Self-test Errors Non-zero error code in response to
the *TST? command.
See Table 4-4 for information on
self-test errors.
Operator Errors Non-zero error code in response to
the SYST:ERR? command.
See Appendix C of the the Agilent
E1463A User’s Manual for Switch
Module errors and causes.
See Appendix B of the
Agilent E1405 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, test connections,
and installed protection devices.
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 (2.0 Ohms),
replace entire printed circuit board
(Agilent part number E1463-66501)
Failing DC Isolation test (See Test
2-2 in Chapter 2)
Check user wiring, test connections,
and installed protection devices.
Remove dust from relay module and
terminal module printed circuit board.
46 Service Chapter 4