TM 1–1520–238–T–3
15–36
Change 4
15–150 SIGNAL NAME:
DEK DATA TO TEU (ACY) DEK DATA (ACZ)
MEMORY LOCATION: 001223
MEMORY DATA BIT(S):
5–11
(ASCII)
CONDITION:
Refer to Table 17–1 for ASCII code conversions.
SIGNAL FUNCTION:
Transfers keyboard entry information.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If ASCII conversion results correspond to the key pressed on DEK, go to paragraph 15–151.
FAIL: Location of fault: go to Chapter 17, paragraph 17–4.
15–151 SIGNAL NAME:
HANDSHAKE TO TEU (ACY) TEU HANDSHAKE CMD (ACZ)
MEMORY LOCATION: 001223
MEMORY DATA BIT(S):
12–19
(HEX)
CONDITION:
Normally B2
SIGNAL FUNCTION:
Reads MRTU and performs pattern check.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If hexadecimal conversion for bits 12 through 19 corresponds to normal bit patterns, go to
paragraph 15–152.
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).
15–152 SIGNAL NAME:
LASER RANGE VALID (ACY) LRFD RANGE VALID (ACZ)
MEMORY LOCATION: 001125
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates range obtained from LEU is valid.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If fifth digit on HOD is 2, 3, 6, or 7, go to paragraph 15–153.
FAIL: Location of fault: LEU, wiring from LEU to TEU, 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).
15–153 SIGNAL NAME:
LASER RANGE OVERFLOW (ACY) LRFD NO RETURN (ACZ)
MEMORY LOCATION: 001125
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates laser has used range that is greater than maximum.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If sixth digit on HOD is 0, go to paragraph 15–154.
FAIL: Location of fault: laser tracker (LT), wiring from LT to TEU, 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).
15–154 SIGNAL NAME:
LASER MULTI–TARGET IND (ACY) LRFD MULTI RETURN (ACZ)
MEMORY LOCATION: 001125
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates rangefinder has picked up targets at different distances.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If fifth digit on HOD is 1, 2, or 3, go to paragraph 15–155.
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).
