Tektronix TLA 720, Service Manual

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TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual
4–27
Hardware Troubleshooting
WARNING.
Read the General Safety Summary and Service Safety Summary
found at the beginning of this manual before doing this or any other procedure.
To prevent possible injury to service personnel or damage to electrical compo-
nents, read Preventing ESD on page 4–1.
This section contains information and procedures designed to help you isolate
faults to the replaceable part level. To eliminate easy to find problems first, use
the following steps:
H
Follow Check for Common Problems on page 4–28.
H
Follow Troubleshoot the Benchtop Chassis, beginning on page 4–29.
If you replace a faulty part, you must follow any verification procedures
identified in the TLA 700 Series Performance Verification and Adjustment
Technical Reference Manual.
Service Level
This section supports isolation of faults to the replaceable-part level that is
reflected in the replaceable parts list in Chapter 10.
In most cases, faults are isolated to circuit boards or assemblies, but not to
individual components on those boards. (See Strategy for Servicing on
page xv.)
Fault isolation is supported for the following replaceable parts:
H
Blower
H
Enhanced monitor board
H
Power-supply
H
Backplane
H
Fuses, cables, and other parts