TM 1–1520–238–T–3
10–2
Change 2
MULTIPLEX READ CODE INTERPRETATIONS
10–1 SIGNAL NAME:
PILOT PNVS LIGHT
MEMORY LOCATION: 001632
MEMORY DATA BIT(S):
17
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Monitors PNVS pilot caution/warning panel light.
REMARKS: From FCC through right–hand (RH) forward avionics bay (FAB) multiplex remote terminal
unit (MRTU) Type I to pilot caution/warning panel.
PASS:
Location of fault if first digit on heads out display (HOD) is 0, 1, 2,or 3: pilot caution/warning
panel, wiring from pilot caution/warning panel to RH FAB MRTU Type I, RH FAB MRTU Type
I. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–8).
FAIL: Location of fault: go to paragraph 10–2.
10–2 SIGNAL NAME:
PNVS PWR SW (AAD)
MEMORY LOCATION: 001555
MEMORY DATA BIT(S):
19
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Monitors PNVS power switch on/off condition.
REMARKS: From pilot fire control panel (FCP) through RH FAB MRTU Type I to FCC.
PASS:
If first digit on HOD is 1, 3, 5, or 7, go to paragraph 10–3.
FAIL: Location of fault: pilot FCP, wiring from pilot FCP to RH FAB MRTU Type I, RH FAB MRTU
Type I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
10–3 SIGNAL NAME:
PNVS STBY TO PEU
MEMORY LOCATION: 001632
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Monitors PNVS switch on/off condition.
REMARKS: From FCC through RH FAB MRTU Type I to PNVS electronic unit (PEU).
PASS:
If sixth digit on HOD is 1, go to paragraph 10–4.
FAIL: Location of fault: RH FAB MRTU Type I, wiring from RH FAB MRTU Type I to PEU, PEU.
Troubleshoot wiring to isolate fault (TM 1–5855–265–T).
10–4 SIGNAL NAME:
PLT SIGHT SEL SW
MEMORY LOCATION: 001122
MEMORY DATA BIT(S):
4–7
(HEX)
CONDITION:
If sixth digit displayed on HOD is 1 and fifth digit is 3=HMD
If sixth digit displayed on HOD is 1 and fifth digit is 5=PNVS
If sixth digit displayed on HOD is 1 and fifth digit is 6=TADS
If sixth digit displayed on HOD is 1 and fifth digit is 7=STBY
SIGNAL FUNCTION:
Indicates pilot selected sight sensor.
REMARKS: From pilot FCP through left–hand (LH) FAB MRTU Type I to FCC.
PASS:
If CONDITION corresponds to selected switch mode, go to paragraph 10–5.
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).
