Tektronix TLA 704, Service Manual

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Troubleshooting
6–40
TLA 704 Color Portable Mainframe Service Manual
For a list of manuals available for the TLA 700 Logic Analyzer, see Optional
Accessories on page 10–3.
Check for Common Problems
Use Table 6–2 to quickly isolate possible failures. The table lists problems
related to the portable mainframe and possible causes. The list is not exhaustive,
but it may help you eliminate a problem that is quick to fix, such as a blown fuse
or loose cable.
Table 6–2: Failure symptoms and possible causes
Symptom Possible cause(s)
Portable mainframe will not
power on
H
Power cord not plugged in
H
Failed fuse
H
Faulty power supply
H
Faulty backplane board
H
Faulty module
Front panel light comes on
(mainframe powers on), but
one or more fans will not
operate
H
Faulty fan cable
H
Defective fan
H
Faulty power supply
Controller appears “dead”;
power light comes on, but
monitor screen(s) is (are)
blank, mainframe emits no
beeps
H
SIMMs incorrectly installed or missing
H
Defective controller board
External monitor does not
power on
H
Monitor power cord not plugged in
H
Failed fuse
H
Monitor failure
External monitor powers on,
but is blank
H
External monitor controls turned down
H
Monitor cable faulty or not connected to mainframe
H
Display selection jumper set incorrectly on front panel
interface board
H
Monitor defective