TM 11-6625-3081-23
7-28. OPTICAL SIGNAL GENERATOR (0SG) 2A2A3
7-28
INPUT CODE: OSGST (cont)
c .
SEGMENT 1
1. VDT DISPLAY
OSG LAMP DETECTOR A1 ERROR.
PERFORM THE FOLLOWING REPLACE ACTIONS IN THE
ORDER LISTED.
(REFERENCE TM 11-6625-3081-23 FOR REPLACEMENT PROCEDURES.)
REF. DES.
PART NO.
NAME
1. 2A2A3A2XX
13081976
OPTICAL SENSOR
2. 2A2A13X
AC4720
A/D CCA (SLOT J7)
3. 2A2A7A
13081572
RELAY ASSY.
4. 2A2A4A1
13083063
RELAY ASSY.
5. 2A2A3
13231679
O.S.G.
2. CORRECTIVE ACTION - SEGMENT 1
(a) Remove Optical Sensor 2A2A3A2XX.
Check contacts of mating connectors
and repair if required.
Install replacement 2A2A3A2XX and perform
OSGST test.
If OSGST 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 A/D CCA 2A2A13XX (J7).
Check contacts of mating connectors and
repair if required.
Install replacement 2A2A13XX and perform OSGST
test.
If OSGST 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 Relay Assembly 2A2A7A4.
Check contacts of mating connectors and
repair if required.
Install replacement 2A2A7A4 and perform OSGST
test.
If OSGST test passes, no further action required.
If this seg-
ment displayed again, proceed to (d). If another segment displayed,
proceed to that segment and continue troubleshooting.
(d) Remove Relay Assembly 2A2A4A1.
Check contacts of mating connectors and
repair if required.
Install replacement 2A2A4A1 and perform OSGST
test.
If OSGST test passes, no further action required.
If this seg-
ment displayed again, proceed to (e). If another segment displayed,
proceed to that segment and continue troubleshooting.
(e) Remove Optical Signal Generator (OSG) 2A2A3. Check contacts of mating
connectors and repair if required.
Install replacement 2A2A3 and per-
form OSGST test.
If OSGST test passes, no further action required. If
this segment displayed again, proceed to (f). If another segment dis-
played, proceed to that segment and continue troubleshooting.
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