TM 11-7440-232-12/NAVELEX 0967-LP-275-5010
TROUBLESHOOTING CHART NO. 2 (cont'd)
STEP
INSTRUCTION
INDICATION
YES
NO
REMARKS
5
POWER SUPPLY- PRINTED CIRCUIT CARD
(cont)
POWER SUPPLY - PRINTED CIRCUIT CARD
Install known good
6
power supply. Turn
POWER on.
Alarm
X
Resume
operation.
Alarm
X
If fuses have
blown replace
modem. If not,
continue
trouble-
shooting.
Check that power
7
supply voltages are
present at shelf position
A7 using the following
procedures.
(1) Turn POWER switch
off.
(2) Remove decoder
error detector.
5-27
