Troubleshooting; Identifying The Problem - Agilent Technologies 75000 C Series Service Manual

Troubleshooting

Identifying the
Problem
Problem
Type
Self-test Errors
Operator Errors
Catastrophic
Failures
Performance Out
of Specification
46 Service
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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.
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
Symptom
Non-zero error code in response to
the *TST? command.
Non-zero error code in response to
the SYST:ERR? command.
Not responding to commands.
Failing Closed Channel Resistance
Test (see Test 2-1 in Chapter 2).
Failing DC Isolation test (See Test
2-2 in Chapter 2)
Possible
Solutions
See Table 4-4 for information on
self-test errors.
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.
Check logical address setting.
Check GPIB cables and connections.
See "Testing the Assembly" in this
chapter.
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)
Check user wiring, test connections,
and installed protection devices.
Remove dust from relay module and
terminal module printed circuit board.
Chapter 4