TM 11-7440-232-12/ NAVELEX 0967-LP-275-5010
TROUBLESHOOTING CHART NO. 1 (cont'd)
STEP
INSTRUCTION
INDICATION
YES
NO
REMARKS
(5) Turn POWER switch off and remove module
extender.
Turn POWER switch off
on known good power
6
supply and install it.
Turn POWER switch on.
Power lamp lights.
X
Alarm sounds.
X
Resume
operation.
Power lamp lights.
X
Alarm sounds.
X
Go to Trouble-
shooting Chart
No. 2.
Power lamp lights.
X
Alarm sounds.
X or
X
Refer to next
higher level of
maintenance.
Replace digital data
modem. Turn POWER
7
switch on.
Same INDICATIONS
Same
as in Step 6.
REMARKS as
in Step 6.
End of Troubleshooting Chart No. 1. Next page is 5-23 Troubleshooting Chart No. 2, "Alarm Sounds with POWER
switch On and Power Lamp Lights".
5-22
