TM 11-6625-3081-23
7 - 2 1.
PHOTOMULTIPLIER BRACKET ASSEMBLY 2A1A1A7 AND PHOTOMULTIPLIER TUBE
(PMT/LED SOURCE)
7-21
INPUT CODE:
PMTLED (cont)
e. SEGMENT 3
1 .
2 .
VDT DISPLAY
FILTER NOT AT OUT POSITION AT STARTUP.
PERFORM THE FOLLOWING REPLACE
ACTIONS IN THE ORDER LISTED.
(REFERENCE TM 11-6625-3081-23 FOR REPLACEMENT
PROCEDURES.)
REF. DES.
1. 2A2A6XX
2. 2A1A1A1A8
3. 2A1A1A1A7XX
CORRECTIVE ACTION -
(a) Remove Digital
connectors and
perform PMTLED
PART NO.
NAME
HP69331B
DIGITAL OUTPUT CCA (SLOT 408)
13082137
ELECTRICAL FILTER ASSY.
1-176-257
PMT SHUTTER ASSY.
SEGMENT 3
Output CCA 2A2A6XX (slot 408). Check contacts of mating
repair if required.
Install replacement 2A2A6XX and
test.
If PMTLED test passes, no further action
required.
If this segment displayed again, proceed to (b). If another
segment displayed, proceed to that segment and continue
troubleshooting.
(b) Remove Electrical Filter Assembly 2A1A1A1A8. Check contacts of mating
connectors and repair if required.
Install replacement 2A1A1A1A8 and
perform PMTLED test.
If PMTLED test passes, no further action
required.
If this segment displayed again, proceed to (c). If another
segment displayed, proceed to that segment and continue
troubleshooting.
(c) Remove PMT Shutter Assembly 2A1A1A1A7XX. Check contacts of mating
connectors and repair if required.
Install replacement 2A1A1A1A7XX and
perform PMTLED test.
If PMTLED test passes, no further action
required.
If this segment displayed again, proceed to (d). If another
segment displayed, proceed to that segment and continue
troubleshooting.
7-106
