TM 1–1520–238–T–3
Change 4
8–297
8–1133 SIGNAL NAME:
UPPER LOWER PRIORITY (ACY) PRI CHAN IND (ACZ)
MEMORY LOCATION: 001342
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
If the sixth digit displayed on HOD is 0=LOWER
If the sixth digit displayed on HOD is 1=UPPER
SIGNAL FUNCTION:
Indicates to operator which channel has priority.
REMARKS: From RHE to FCC.
PASS:
If CONDITION corresponds to selected mode, go to paragraph 8–1134.
FAIL: Location of fault: replace RHE (TM 9–1427–475–20).
8–1134 SIGNAL NAME:
CPG UPPER CHANNEL SEL COMMAND (ACY) CPG UPPER PRI CMD (ACZ)
MEMORY LOCATION: 001437
MEMORY DATA BIT(S):
10
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Sets priority of upper channel and commands RHE to store current switch
positions of missile laser code and quantity switches on CPG FCP and TYPE
and MSL MODE switches on CPG missile panel.
REMARKS: From CPG FCP to RHE.
PASS:
If fourth digit on HOD is 1, 3, 5, or 7, go to paragraph 8–1135.
FAIL: Location of fault: CPG FCP, wiring from CPG FCP to RHE, RHE. Troubleshoot wiring to isolate
fault (TM 9–1427–475–20).
8–1135 SIGNAL NAME:
CPG UPPER CHANNEL SW
MEMORY LOCATION: 000437
MEMORY DATA BIT(S):
9
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG has selected upper channel to code.
REMARKS: From CPG FCP through CPG MRTU Type III to FCC.
PASS:
If fourth digit on HOD is 0, 1, 4, or 5, go to paragraph 8–1136.
FAIL: Location of fault: CPG FCP, wiring from CPG FCP to CPG MRTU Type III, CPG MRTU Type III.
Troubleshoot wiring to isolate fault (TM 9–1427–475–20).
8–1136 SIGNAL NAME:
PILOT UPPER CHANNEL SW
MEMORY LOCATION: 001120
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates pilot has selected upper channel to code.
REMARKS: From pilot missile control panel through LH FAB MRTU Type I to RHE.
PASS:
If sixth digit on HOD is 1, 3, 5, or 7, go to paragraph 8–1137.
FAIL: Location of fault: pilot missile control panel, wiring from pilot missile control panel to LH FAB
MRTU Type I, LH FAB MRTU Type I. Troubleshoot wiring to isolate fault (TM 9–1427–475–20).
