TM 11-7440-232-12/ NAVELEX 0967-LP-275-5010
TROUBLESHOOTING CHART NO. 1 (cont'd)
STEP
INSTRUCTION
INDICATION
YES
NO
REMARKS
Check ac power distribution circuits,
Repair trouble
especially fuses, circuit breakers, switches
is found. If not,
4
and plug connections. Refer to technical
refer to next
manual that applies to the system in which
higher level of
the digital data modem is being used.
Maintenance.
Check that 115V ac is reaching the power supply
connector using the following test procedure:
(1) Turn POWER switch off.
(2) Remove power supply.
(3) Plug in PCC module extender. Do not plug
power supply into module extender.
(4) Turn POWER switch on and read voltage
between pins 7 and 8 on the module extender
as shown below:
5
SYSTEM NOMINAL
ACCEPTABLE
LINE VOLTAGE
RESULT
112V ac
100-123V
X
Go to Step 6.
117V ac
105-129V
X
Go to Step 6.
122V ac
110-134
X
Go to Step 6.
If result is not acceptable......................................................................................Go to Step 7.
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