TM 1–1520–238–T–3
16–2
Change 5
Personnel Required:
(2)
References:
TM 9–1230–476–20–2
TM 9–1090–208–23–2
TM 9–1427–475–20
Equipment Conditions:
Ref
Condition
TM 9–1230–476–20–2
MULTIPLEX SUBSYSTEM
– MAINTENANCE
OPERATIONAL CHECK in
progress
NOTE
All multiplex read code responses are read from right to
left.
Multiplex read codes must be used in conjunction with
applicable Maintenance Operational Check (MOC) in
progress.
Multiplex read codes are observed on the HOD (ADC) or
CDU (ADD).
MULTIPLEX READ CODE INTERPRETATIONS
16–1 SIGNAL NAME:
FD/LS STATUS
MEMORY LOCATION: 000415
MEMORY DATA BIT(S):
8
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Generates fault detection and location system (FD/LS) no go.
REMARKS: From copilot/gunner (CPG) fire control panel (FCP) through CPG multiplex remote
terminal unit (MRTU) Type III to fire control computer (FCC).
PASS:
Location of fault if fourth digit on heads out display (HOD) is 0, 1, 2, or 3: CPG MRTU Type III,
wiring from CPG MRTU Type III to CPG FCP, CPG FCP. CPG transformer rectifier, wiring from
CPG transformer rectifier to MISSION FC AC circuit breaker, MISSION FC AC circuit breaker.
Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
FAIL: Location of fault: CPG transformer rectifier, wiring from CPG transformer rectifier to MISSION
FC AC circuit breaker, MISSION FC AC circuit breaker. Troubleshoot wiring to isolate fault
(TM 9–1230–476–20–2).
16–2 SIGNAL NAME:
CPG RKT TRIG
MEMORY LOCATION: 000414
MEMORY DATA BIT(S):
13
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Initiates rocket firing sequence.
REMARKS: From CPG FCP through CPG MRTU Type III to FCC.
PASS:
If third digit on HOD is 1, 3, 5, or 7, go to paragraph 16–3.
FAIL: Location of fault: go to Chapter 12, paragraph 12–6.
