TM 1–1520–238–T–3
15–28
Change 4
15–115 SIGNAL NAME:
FLIR COOLED
MEMORY LOCATION: 000402
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD; memory location response is positive when not cooled and negative
when cooled
SIGNAL FUNCTION:
Monitors detector/dewar assembly.
REMARKS: From TADS through CPG MRTU Type III to FCC.
PASS:
If CONDITION is met, go to paragraph 15–116.
FAIL: Location of fault: dewar detector, automatic control module (ACM), post amplifier, night sensor
assembly (NSA), bulkhead connector, wiring from bulkhead connector to CPG MRTU Type III,
CPG MRTU Type III. Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–116 SIGNAL NAME:
TURRET TEMP COLD
MEMORY LOCATION: 000412
MEMORY DATA BIT(S):
17
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
FALSE indicates TADS turret is at operating temperature (45 5 F).
REMARKS: From TADS through CPG MRTU Type III to FCC.
PASS:
If first digit on HOD is 4, 5, 6, or 7, go to paragraph 15–117.
FAIL: Location of fault: switch thermal assembly, day sensor assembly DSA, bulkhead connector,
ECS, wiring from bulkhead to CPG MRTU Type III, CPG MRTU Type III. Troubleshoot wiring to
isolate fault (TM 1–1270–476–T).
15–117 SIGNAL NAME:
TURRET OVERTEMP
MEMORY LOCATION: 001135
MEMORY DATA BIT(S):
10
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates TADS turret operating temperature is above normal.
REMARKS: From TADS turret through LH FAB MRTU Type I to FCC.
PASS:
If fourth digit is 1: troubleshoot TADS turret NSA (TM 1–1270–476–T).
FAIL: Location of fault: DSA, NSA, bulkhead connector, wiring from bulkhead to TEU, TEU, wiring
from TEU to CPG MRTU Type III, CPG MRTU Type III. Troubleshoot wiring to isolate fault
(TM 1–1270–476–T).
15–118 SIGNAL NAME:
LASER COOLANT LOW IN (ACY) LRFD LOW COOL IND (ACZ)
MEMORY LOCATION: 001076
MEMORY DATA BIT(S):
15
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates laser cavity coolant low.
REMARKS: From TADS LEU through LH FAB MRTU Type I to FCC.
PASS:
If second digit on HOD is 2, 3, 6, or 7, go to paragraph 15–119.
FAIL: Location of fault: reservoir assembly, laser cooling unit assembly, wiring from LTU to LH FAB
MRTU Type I, LH FAB MRTU Type I. Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
