TM 11-6625-3081-23
7 - 2 1 .
PHOTOMULTIPLIER BRACKET ASSEMBLY 2A1A1A7 AND PHOTOMULTIPLIER TUBE
7-21
(PMT/LED SOURCE)
INPUT CODE: PMTLED (cont)
2. CORRECTIVE ACTION - SEGMENT 3 (cont)
(d) Check the following cable assemblies and repair as required:
W27
W28
2A1W26
2A1W32
2A1A1W9
2A1A1W11
2A2W3
2A2W9
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.
f .
SEGMENT 4
1. VDT DISPLAY
PERFORM THE FOLLOWING REPLACE ACTIONS IN THE ORDER LISTED. (REFERENCE
TM 11-6625-3081-23 FOR REPLACEMENT PROCEDURES.)
REF. DES.
PART NO.
NAME
1. 2A2A6XX
HP69331B
DIGITAL OUTPUT CCA (SLOT 408)
2. 2A2A6XX
HP69331B
DIGITAL OUTPUT CCA (SLOT 409)
3. 2A1A1A1A8
13082137
ELECT. FILTER INTERFACE
4. 2A1A1A1A7XX
1-176-257
PMT SHUTTER ASSY.
7-107
