TM 1–1520–238–T–3
7–8
Change 4
7–25 SIGNAL NAME:
PILOT IHU STATUS
MEMORY LOCATION: 001571
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Monitors pilot IHU.
REMARKS: From pilot IHU to SEU through RH FAB MRTU Type I to FCC.
PASS:
Location of fault if sixth digit on HOD is 0: wiring from SEU to pilot IHU. Troubleshoot wiring to
isolate fault (TM 9–1270–221–23).
FAIL: Location of fault: pilot IHU, wiring from pilot IHU to SEU, SEU, wiring from SEU to RH FAB
MRTU Type 1, RH FAB MRTU Type 1. Troubleshoot wiring to isolate fault
(TM 9–1270–221–23).
7–26 DELETED
7–27 SIGNAL NAME:
ORT IHADSS BRT ADJ (ACY) CPG BRT ADJ (ACZ)
MEMORY LOCATION: 000431
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while adjusting ORT IHAD brightness from minimum (–) to maximum (+) .
SIGNAL FUNCTION:
Controls IHADSS brightness.
REMARKS: From ORT through CPG MRTU Type III to FCC.
PASS:
If condition is met go to paragraph 7–28.
FAIL: Location of fault: ORT, wiring from ORT to CPG MRTU Type III, CPG MRTU Type III.
Troubleshoot wiring to isolate fault (TM 9–1270–221–23).
7–28 SIGNAL NAME:
ORT IHADSS BRT TO TEU (ACY) CPG BRT ADJ TST (ACZ)
MEMORY LOCATION: 001260
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while adjusting ORT IHAD brightness from minimum (–) to maximum (+).
SIGNAL FUNCTION:
Indication of ORT control outputs to TEU.
REMARKS: From FCC to TEU.
PASS:
If condition is met go to paragraph 7–29.
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 1–1270–476–T).
