TM 1–1520–238–T–3
10–10
10–34 SIGNAL NAME:
NEG SIN ELEVATION
MEMORY LOCATION: 001620
MEMORY DATA BIT(S):
4–19
(SCALAR)
CONDITION:
Monitor HOD; memory location responses should indicate a negative downward and a
positive upward.
SIGNAL FUNCTION:
Used by PNVS in direct mode.
REMARKS: From FCC through RH FAB MRTU Type I to PEU.
PASS:
If CONDITION corresponds to correct memory location responses, go to paragraph 10–36.
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).
10–35 SIGNAL NAME:
SINE AZIMUTH
MEMORY LOCATION: 001621
MEMORY DATA BIT(S):
4–19
(SCALAR)
CONDITION:
Monitor HOD; memory location responses should indicate a negative response to the
left and a positive response to the right.
SIGNAL FUNCTION:
Used by PNVS in direct mode.
REMARKS: From FCC through RH FAB MRTU Type I to PEU.
PASS:
Location of fault if CONDITION corresponds to correct memory location responses: turret
assembly, PEU, wiring from PEU to RH FAB MRTU Type I, RH FAB MRTU
Type I. Troubleshoot wiring to isolate fault (TM 1–5855–265–T).
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).
10–36 SIGNAL NAME:
PNVS I DIR COS
MEMORY LOCATION: 001132
MEMORY DATA BIT(S):
4–19
(SCALAR)
CONDITION:
Monitor PNVS I direction cosine signal polarity on HOD; memory response should
increase and decrease with roll movement relative to PNVS fixed forward position (0).
SIGNAL FUNCTION:
Contains roll LOS information.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If CONDITION corresponds to correct memory location responses, go to paragraph 10–38.
FAIL: Location of fault: TEU, wiring from TEU to LH FAB MRTU Type I, LH FAB MRTU Type I.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
10–37 SIGNAL NAME:
PNVS J DIR COS
MEMORY LOCATION: 001133
MEMORY DATA BIT(S):
4–19
(SCALAR)
CONDITION:
Monitor PNVS J direction cosine signal polarity on HOD as PNVS is moved up (+) or
down (–) relative to PNVS fixed forward position (0).
SIGNAL FUNCTION:
Contains azimuth LOS information.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If CONDITION corresponds to correct memory location responses, go to paragraph 10–39.
FAIL: Location of fault: TEU, wiring from TEU to LH FAB MRTU Type I, LH FAB MRTU Type I.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
