TM 1–1520–238–T–3
10–11
10–38 SIGNAL NAME:
PNVS K DIR COS
MEMORY LOCATION: 001134
MEMORY DATA BIT(S):
4–19
(SCALAR)
CONDITION:
Monitor PNVS K direction cosine signal polarity on HOD as PNVS lens assembly is
moved forward (–) or backward (+) relative to PNVS focal plane (0).
SIGNAL FUNCTION:
Contains pitch LOS information.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If CONDITION corresponds to correct memory location response, go to paragraph 10–40.
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).
10–39 SIGNAL NAME:
PNVS I DIR COS TO TEU
MEMORY LOCATION: 001233
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 FCC through LH FAB MRTU Type I to TEU.
PASS:
If CONDITION corresponds to correct memory location responses, go to paragraph 10–41.
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 1–5855–265–T).
10–40 SIGNAL NAME:
PNVS J DIR COS TO TEU
MEMORY LOCATION: 001234
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 FCC through LH FAB MRTU Type I to TEU.
PASS:
If CONDITION corresponds to correct memory location responses, go to paragraph 10–42.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to PEU, PEU.
Troubleshoot wiring to isolate fault (TM 1–5855–265–T).
10–41 SIGNAL NAME:
PNVS K DIR COS TO TEU
MEMORY LOCATION: 001235
MEMORY DATA BIT(S):
4–19
(SCALAR)
CONDITION:
Monitor PNVS K direction cosine signal polarity on HOD as PNVS lens assembly is
moved forward (–) or backward (+) relative to PNVS focal plane (0).
SIGNAL FUNCTION:
Contains pitch LOS information.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If condition corresponds to correct memory location response, go to Chapter 15, paragraph
15–222.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to PEU, PEU.
Troubleshoot wiring to isolate fault (TM 1–5855–265–T).
