TM 1–1520–238–T–3
Change 4
15–37
15–155 SIGNAL NAME:
LASER CCM SW TO TEU (ACY) LRFD CCM CMD (ACZ)
MEMORY LOCATION: 001215
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
0=A target
1=B target
SIGNAL FUNCTION:
Commands range computation of target.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If sixth digit on HOD is 0, go to paragraph 15–156.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to TEU, TEU.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–156 SIGNAL NAME:
LASER RANGE (ACY) LRFD RANGE (ACZ)
MEMORY LOCATION: 001125
MEMORY DATA BIT(S):
7–19
(SCALAR)
CONDITION:
Monitor HOD while range increases; memory location response should increase when
range increases and decrease when range decreases.
SIGNAL FUNCTION:
Indicates range in meters to target being lased.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If CONDITION corresponds to correct range data, go to paragraph 15–157.
FAIL: Location of fault: TEU, wiring from TEU to LH FAB MRTU Type I, LH FAB MRTU Type I.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–157 SIGNAL NAME:
RANGE TEU (ACY) RANGE AID (ACZ)
MEMORY LOCATION: 001227
MEMORY DATA BIT(S):
4–15
(SCALAR)
CONDITION:
Monitor HOD while range increases; memory location response should increase when
range increases and decrease when range decreases.
SIGNAL FUNCTION:
Indicates range in meters to target being lased.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
Location of fault if CONDITION is met: replace TEU (TM 1–1270–476–20).
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to TEU, TEU.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–158 SIGNAL NAME:
LASER ON TO TEU (ACY) LRFD ON CMD (ACZ)
MEMORY LOCATION: 001244
MEMORY DATA BIT(S):
13
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG has turned laser on.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If third digit on HOD is 1, 3, 5, or 7, go to paragraph 15–159.
FAIL: Location of fault: go to Chapter 16, paragraph 16–35.
15–159 SIGNAL NAME:
LASER TRIG 1ST DETENT (ACY) LRFD TRIG 1ST DTT (ACZ)
MEMORY LOCATION: 000414
MEMORY DATA BIT(S):
17
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG has pulled laser trigger to first or second detent.
REMARKS: From ORT lefthand grip through CPG MRTU Type III to FCC.
PASS:
If first digit on HOD is 4, 5, 6, or 7, go to paragraph 15–160.
FAIL: Location of fault: ORT lefthand grip, wiring from ORT to CPG MRTU Type III, CPG MRTU Type
III. Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
