TM 11-7440-232-12/NAVELEX 0967-LP-275-5010
Table 2-1. OPERATOR/CREW PREVENTIVE MAINTENANCE CHECKS AND SERVICES
INTERVAL
Item To Be
Procedures Check
Item
Inspected
For And Have Repaired Or
Equipment Is Not
No.
B
D
AWM
Adjusted As Necessary.
Ready/Available If:
1
POWER ON
Set power supply switch to ON.
Power switch can-
switch
not be set to ON.
2
Power
Observe that POWER indicator lamp
POWER lamp does
applied,
is lighted. Replace bulb if
not light.
visual
necessary.
Indication
3
ERRORS
Observe that ERRORS indicator lamp
ERRORS lamp is
visual
is not lighted.
lighted.
Indication
4
Malfunction
Listen for alarm sound from
Alarm sounds.
of modem
peripheral alarm.
audible
indication
5
Alarm
If alarm sounds, on data carr-
Alarm sounds.
CUTOFF
ier alarm set ALARM CUTOFF switch
switch
to CUTOFF position. Alarm
sound should cease.
6
Alarm
If alarm sounds, on data carrier
Alarm CUTOFF switch
CUTOFF
alarm set ALARM CUTOFF switch
will not move or does
switch
through both switch sett-
not align with appli-
ing positions. Check that switch
cable switch position.
can be positioned to
NORMAL OR CUTOFF.
NOTE
The following PMCS can be performed
without power applied to the digital data
modem, if required. Go to and perform
PMCS item numbers 12 and 13.Then, return
to and perform PMCS item numbers 7
through 11.
7
TRANS
On transmitter, rotate TRANS
TRANS MODE switch
MODE
MODE switch through all switch
will not rotate or
switch
setting positions. Check that
does not align with
switch
can be positioned to
applicable switch
NORM, LOW, HIGH, REV. and PATT.
position.
2-6
