TM 1–1520–238–T–3
Change 4
15–5
15–5 SIGNAL NAME:
CPG ACQ SEL SW
MEMORY LOCATION: 001074
MEMORY DATA BIT(S):
7–9
(OCTAL)
CONDITION:
If the fourth digit displayed on HOD is 0 or 1=PHS
(Chapter 7, paragraph 7–38)
If the fourth digit displayed on HOD is 2 or 3=FXD
(Chapter 10, paragraph 10–30)
If the fourth digit displayed on HOD is 4 or 5=TGT
(Chapter 16, paragraph 16–23)
If the fourth digit displayed on HOD is 6 or 7=NAV.
(Chapter 20, paragraph 20–37)
If the fifth digit displayed on HOD is 1, 3, 5, or 7=GHS
(Chapter 7, paragraph 7–56)
If the fifth digit displayed on HOD is 1, 3, 5, or 7 and the fourth digit displayed on HOD
is 2 or 3=MSL SKR (Chapter 8, paragraph 8–10)
If the fifth digit displayed on HOD is 1, 3, 5, or 7 and the fourth digit displayed on HOD
is 4 or 5=TADS (Chapter 15 paragraph 15–6)
SIGNAL FUNCTION:
Enables cueing or slaving to selected CPG line of sight (LOS).
REMARKS: From CPG FCP through LH FAB MRTU Type I to FCC.
PASS:
If CONDITION displayed on HOD corresponds to CPG SIGHT SEL switch position, refer to
appropriate chapter and paragraph as listed under CONDITION.
FAIL: Location of fault: CPG FCP, wiring from CPG FCP to LH FAB MRTU Type I, LH FAB MRTU
Type I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
15–6 SIGNAL NAME:
TADS FIXED FWD TO TEU (ACY) TADS FIXED FWD CMD (ACZ)
MEMORY LOCATION: 001245
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates fixed forward is selected.
REMARKS: From FCC through LH FAB MRTU Type I to TADS electronic unit (TEU).
PASS:
If fifth digit on HOD is 2, 3, 6, or 7, go to paragraph 15–7.
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).
15–7 SIGNAL NAME:
TADS FLIR STBY TO TPS (ACY) TADS FLIR STBY CMD (ACZ)
MEMORY LOCATION: 001220
MEMORY DATA BIT(S):
15
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates TADS has been selected.
REMARKS: From FCC through LH FAB MRTU Type I to TADS power supply (TPS).
PASS:
If second digit on HOD is 2, 3, 6, or 7, go to paragraph 15–8.
FAIL: Location of fault: TPS, wiring from TPS to LH FAB MRTU Type I, LH FAB MRTU Type I.
Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
15–8 SIGNAL NAME:
TADS STBY TO TPS (ACY) TADS STBY CMD (ACZ)
MEMORY LOCATION: 001220
MEMORY DATA BIT(S):
16
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates TADS has been turned on.
REMARKS: From FCC through LH FAB MRTU Type I to TPS.
PASS:
If second digit on HOD is 1, 3, 5, or 7, go to paragraph 15–9.
FAIL: Location of fault: TPS, wiring from TPS to LH FAB MRTU Type I, LH FAB MRTU Type I.
Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
