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Page Title:
Table 6-1. TROUBLESHOOTING (cont) |
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 TM 55-4920-416-13
NAVAER 17-15C-539
Section VI
TABLE 6-1 (Cont)
TROUBLESHOOTING
TROUBLE
CAUSE
REMEDY
3.
Indicator lamp out; motor does not run.
DC OPERATION
(Cont)
(Cont)
Open lead in power Cable or from power
alone and from receptacle J1 to motor and
receptacle to motor and lamp.
lamp. Repair or replace broken wires.
AC OPERATION
Open or shorted lead to connector J1 pin H
Repair or replace.
from capacitor C1.
Open or shorted lead between capacitor
Repair or replace.
and rectifier.
Open rectifier or shorted capacitor and
Check RMS voltage on yellow coded lugs
motor.
of rectifier. If voltage is present with no DC
voltage across the red and black coded
lugs, either the rectifier is open or capacitor
or motor is shorted. Disconnect red leads
from the rectifier and recheck voltage
across red and black coded lugs of
rectifier. If D.C. voltage is now present,
capacitor or motor is shorted. Replace.
Open lead
between
transformer
and
Check voltage across lugs 3 and 4 of
rectifier.
transformer and across yellow coded lugs
of rectifier. If voltages are not identical,
there is an open lead between them.
Repair or replace.
Open transformer primary
or
open
With mating plug to J1 disconnected,
transformer input leads.
resistance check between pins 1 and 2 at
T1: Approximately 2.8 ohms. If open,
replace transformer.
Next, resistance
check on J1 between pins I and J:
Approximately 2.8 ohms. If open, repair or
replace defective lead.
Open transformer secondary.
Voltage across pins 3 and 4 of T1 : 25 V
RMS. If zero, disconnect a lead from
either pin 3 or 4 and recheck voltage. If
still zero, replace transformer.
4.
Indicator lamp lights; motor does not
Broken motor lead.
Repair or replace.
run.
Motor power connector not tight.
Tighten connector.
29
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