TM 1–1520–238–T–3
25–2
Change 4
MULTIPLEX READ CODE INTERPRETATIONS
25–1 SIGNAL NAME:
LEVEL ADJ
MEMORY LOCATION: 001077
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while increasing LEVEL; memory location response should increase
when LEVEL is increased and decrease when LEVEL is decreased.
SIGNAL FUNCTION:
Adjusts integrated helmet and display sight system (IHADSS) forward looking
infrared (FLIR) video.
REMARKS: From pilot fire control panel (FCP) through left–hand (LH) forward avionics bay (FAB)
multiplex remote terminal unit (MRTU) Type I to fire control computer (FCC).
PASS:
If CONDITION has been met, go to Chapter 7, paragraph 7–29.
FAIL: Location of fault: pilot FCP, wiring to LH FAB MRTU Type I, LH FAB MRTU Type I. Troubleshoot
wiring to isolate fault (TM 9–1230–476–20–2).
25–2 SIGNAL NAME:
GAIN ADJ
MEMORY LOCATION: 001100
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while increasing GAIN; memory location response should increase when
GAIN is increased and decrease when GAIN is decreased.
SIGNAL FUNCTION:
Adjusts IHADSS FLIR GAIN.
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If CONDITION has been met, go to Chapter 7, paragraph 7–33.
FAIL: Location of fault: pilot FCP, wiring from pilot FCP to LH FAB MRTU Type I, LH FAB MRTU Type
I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
25–3 SIGNAL NAME:
BRIGHT ADJ
MEMORY LOCATION: 001103
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while increasing SYM BRT; memory location response should increase
when SYM BRT is increased and decrease when SYM BRT is decreased.
SIGNAL FUNCTION:
Adjusts IHADSS video.
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If CONDITION has been met, go to Chapter 7, paragraph 7–29.
FAIL: Location of fault: pilot FCP, wiring from pilot FCP to LH FAB MRTU Type I, LH FAB MRTU Type
I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
