TM 11-6625-3081-23
7-21. PHOTOMULTIPLIER BRACKET ASSEMBLY 2A1A1A7 AND PHOTOMULTIPLIER TUBE
(PMT/LED SOURCE)
7-21
INPUT CODE:
PMTLED (cont)
2 .
CORRECTIVE ACTION
- SEGMENT 2 (cont)
(e) Remove Power Supply Assembly 2A1A1A6. Check contacts of mating
connectors and repair if required.
Install replacement 2A1A1A6 and
perform PMTLED test.
If PMTLED test passes, no further action
required.
If this segment displayed again, proceed to (f). If another
segment displayed, proceed to that segment and continue
troubleshooting.
(f) Remove Switch Assembly 2A1A1A2A11.
Check contacts of mating connectors
and repair if required.
Install replacement 2A1A1A2A11 and perform
PMTLED test.
If PMTLED test passes, no further action required. If
this segment displayed again, proceed to (g). If another segment
displayed, proceed to that segment and continue troubleshooting.
(g) Check the following cable assemblies and repair as required:
W27
W28
2A1W26
2A1W32
2A1A1W9
2A1A1W11
2A1A1W16
2A2W1
2A2W3
If any cable was repaired, perform PMTLED test. If PMTLED test passes,
no further action required.
If PMTLED test fails and CALCST, PLLBUS,
MTRXSW, ADST, DIGITST, FPSST, and PPSST tests have been performed,
repair is beyond this level of maintenance.
Next higher level of
maintenance required.
If no cables were repaired and CALCST, PLLBUS, MTRXSW, ADST, DIGITST,
FPSST, and PPSST tests have been performed, repair is beyond this level
of maintenance,
Next higher level of maintenance required.
If another segment displayed, proceed to that segment and continue
troubleshooting.
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