TM 1–1520–238–T–3
8–302
8–1150 SIGNAL NAME:
MSL LOWER CHANNEL CODE COMMAND
MEMORY LOCATION: 001441
MEMORY DATA BIT(S):
17–19
(OCTAL)
CONDITION:
If the first digit displayed on HOD is 0=H
If the first digit displayed on HOD is 1=G
If the first digit displayed on HOD is 2=F
If the first digit displayed on HOD is 3=E
If the first digit displayed on HOD is 4=D
If the first digit displayed on HOD is 5=C
If the first digit displayed on HOD is 6=B
If the first digit displayed on HOD is 7=A
SIGNAL FUNCTION:
Indicates which of eight laser codes of the day is selected in the lower
pushbutton index select switch.
REMARKS: From CPG FCP to RHE.
PASS:
If first digit on HOD corresponds to selected code, go to paragraph 8–1151.
FAIL: Location of fault: CPG FCP, wiring from CPG FCP to RHE, RHE. Troubleshoot wiring to isolate
fault (TM 9–1427–475–20).
8–1151 SIGNAL NAME:
MSL LOWER CHANNEL CODE SW
MEMORY LOCATION: 000437
MEMORY DATA BIT(S):
4–6
(OCTAL)
CONDITION:
If the sixth digit displayed on HOD is 0 and the fifth digit is 0 or1=H
If the sixth digit displayed on HOD is 0 and the fifth digit is 2 or 3=G
If the sixth digit displayed on HOD is 0 and the fifth digit is 4 or 5=F
If the sixth digit displayed on HOD is 0 and the fifth digit is 6 or 7=E
If the sixth digit displayed on HOD is 1 and the fifth digit is 0 or 1=D
If the sixth digit displayed on HOD is 1 and the fifth digit is 2 or 3=C
If the sixth digit displayed on HOD is 1 and the fifth digit is 4 or 5=B
If the sixth digit displayed on HOD is 1 and the fifth digit is 6 or 7=A
SIGNAL FUNCTION:
Indicates CPG has selected lower laser coding.
REMARKS: From CPG FCP through CPG MRTU Type III to RHE.
PASS:
If CONDITION corresponds to selected code, go to paragraph 8–1152.
FAIL: Location of fault: CPG FCP, wiring from CPG FCP to CPG MRTU Type III, CPG MRTU Type III.
Troubleshoot wiring to isolate fault (TM 9–1427–475–20).
8–1152 SIGNAL NAME:
MSL LOWER CHANNEL CODE
MEMORY LOCATION: 001343
MEMORY DATA BIT(S):
17–19
(OCTAL)
CONDITION:
If the first digit displayed on HOD is 0=H
If the first digit displayed on HOD is 1=G
If the first digit displayed on HOD is 2=F
If the first digit displayed on HOD is 3=E
If the first digit displayed on HOD is 4=D
If the first digit displayed on HOD is 5=C
If the first digit displayed on HOD is 6=B
If the first digit displayed on HOD is 7=A
SIGNAL FUNCTION:
Indicates lower laser code being used by RHE.
REMARKS: From RHE to FCC.
PASS:
If first digit on HOD corresponds to selected code, go to paragraph 8–1155.
FAIL: Location of fault: replace RHE (TM 9–1427–475–20).
