TM 1–1520–238–T–3
Change 4
15–17
15–60 SIGNAL NAME:
ORT IHADSS CONTRAST TO TEU (ACY) CPG CTRS ADJ TST (ACZ)
MEMORY LOCATION: 001257
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while increasing contrast; memory location response should increase
when contrast is increased and decrease when contrast is decreased.
SIGNAL FUNCTION:
Controls IHADSS contrast.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If CONDITION is met, go to paragraph 15–61.
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).
15–61 SIGNAL NAME:
ORT IHADSS BRT ADJ CTRS (ACY) CPG CTRS ADJ (ACZ)
MEMORY LOCATION: 000432
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while increasing contrast; memory location response should increase
when contrast is increased and decrease when contrast is decreased.
SIGNAL FUNCTION:
Adjusts IHADSS contrast.
REMARKS: From ORT through CPG MRTU Type III to FCC.
PASS:
Location of fault if CONDITION is met: troubleshoot ORT (TM 1–1270–476–T).
FAIL: Location of fault: ORT, wiring from ORT to CPG MRTU Type III, CPG MRTU Type III.
Troubleshoot wiring to isolate fault (TM 1–1270–476–20).
15–62 SIGNAL NAME:
GRAY SCALE
MEMORY LOCATION: 000412
MEMORY DATA BIT(S):
14
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG has selected gray scale.
REMARKS: From ORT through CPG MRTU Type III to FCC.
PASS:
If second digit on HOD is 1, 2, or 3, go to paragraph 15–63.
FAIL: Location of fault: ORT, wiring from ORT to CPG MRTU Type III, CPG MRTU Type III.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–63 SIGNAL NAME:
ORT GRAY SCALE SW TO TEU (ACY) GRAY SCALE SW TST (ACZ)
MEMORY LOCATION: 001252
MEMORY DATA BIT(S):
7
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG has selected gray scale.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If fifth digit is 1 or 5: replace TEU (TM 1–1270–476–20).
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).
15–64 SIGNAL NAME:
TADS SOFTWARE I.D.
MEMORY LOCATION: 001126
MEMORY DATA BIT(S):
12–19
(BINARY)
CONDITION:
Any 8 bit value
SIGNAL FUNCTION:
Provides TEU software version.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If the first digit, second digit, or the third digit is equal to or greater than 1, go to paragraph
15–65.
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).
