Service manual

Troubleshooting To troubleshoot a matrix 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 E1465A/E1466A/
E1467A matrix modules 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 locators and schematics.
Table 4-1. Agilent E1465A/E1466A/E1467A 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
E1465A/E1466A/E1467A User’s
Manual for matrix 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 (2.7 Ohms),
replace entire printed circuit board
(Agilent part number E1466-66501)
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.
56 Service Agilent E1465A/66A/67A Service Manual