MAINTENANCE AND TROUBLESHOOTING
TW SERIES
2-4
TABLE 2-3. TROUBLESHOOTING
Fault Symptom
Troubleshooting / Corrective Action
With unit turned on, front panel
display and fans remain de-
energized.
•
Check for proper input voltage to TW unit.
Correct the input voltage as necessary.
•
De-energized unit, check and replace input
fuses as necessary. Re-energize unit and
test. If fuses open a second time, de-
energize unit and perform disassembly
steps 2.6.1 thru 2.6.12, replacing the power
modules of the phases with the open fuses.
(Note: phase A power module located
nearest to fuse block and phase B in
center). Re-assemble unit and test.
With unit turned on, front panel
display comes on, but fans remain
de-energized.
•
De-energize unit and perform disassembly
step 2.6.1. Insure that fan panel cable
5161563-01 is properly installed. Re-
energize unit and test.
Unit comes up momentarily and
shuts off immediately.
•
De-energize unit and perform disassembly
steps 2.6.1 thru 2.6.5. Insure that the
connectors of cable 5161524-01 are
properly seated. Re-assemble unit and test.
Loss of GPIB communication,
unable to communicate with SW
system via GPIB (IEEE 488.2)
connector.
•
Probable cause is ribbon cable/connector
damage. De-energize unit and perform
disassembly steps 2.6.1 thru 2.6.20
replacing rear panel assembly. Special care
must be taken not to damage ribbon cables
during installation in passageway on side of
chassis. Re-assemble unit and test.
No -or- incorrect output voltage
when unit is programmed correctly
and output relay is closed.
•
De-energize unit and perform disassembly
steps 2.6.1 thru 2.6.7. Inspect cable
5161524-01 for seating problems.
Unit comes up and displays SELF
TEST FAILURE
•
Hit ENTER key. Go into the menu under
CONFIG and verify that the INSTALLED
number reflects the actual quantity of
modules installed.
Summary of Contents for TrueWave TW5250
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