TM 1–1520–238–T–1
Change 5
4–109
4–15 UTIL – INTERACTIVE FD/LS CHECK (cont)
4–15
TASK
RESULT
NOTE
Record all NO–GOs before rotating DATA
ENTRY switch to STBY (ADC).
e. On DEK, rotate
DATA ENTRY switch
to STBY (ADC).
NOTE
If this FD/LS check is to be followed by a
MULTIPLEX SYSTEM – OPERATIONAL
CHECK (TM 9-1230-476-20-2), omit step 3.
3. Perform SYSTEMS – POWER DOWN (para 3–2) if
power no longer required.
FD/LS NO–GO
DISPLAY
CORRECTIVE ACTION
BACKUP BUS
CONTROLLER
NO–GO CPG
COMPARTMENT
Troubleshoot wiring to isolate
fault (TM 9-1230-476-20-2). If
troubleshooting does not
remove NO–GO, replace
Type IIIA MRTU
(TM 9-1230-476-20-1). If
replacement does not
remove NO–GO,replace FCC
(TM 9-1230-476-20-1). If
NO–GO still exist, refer to
TM 9-1230-476-20-2.
DATA ENTRY
KEYBOARD NO–GO
CPG COMPARTMENT
(ADC)
Troubleshoot wiring to isolate
fault (TM 9-1230-476-20-2). If
troubleshooting does not
remove NO–GO, replace
DEK (TM 9-1230-476-20-1).
If NO–GO still exist, refer to
TM 9-1230-476-20-2.
CPG FIRE CONTROL
PANEL NO–GO CPG
COMPARTMENT
Troubleshoot wiring to isolate
fault (TM 9-1230-476-20-2). If
troubleshooting does not
remove NO–GO, replace
CPG FIRE CONTROL panel
(fig. 2–33)
(TM 9-1230-476-20-1) .If
NO–GO still exist, refer to
TM 9-1230-476-20-2.
END OF TASK
