TM 11-6130-392-34
3-9b. and put A12 on extender board.
(1) If waveform is same as figure 3-5; discon-
tinue testing, send battery charger to next higher
d. Connect negative () lead of multimeter to
maintenance level.
negative () terminal of capacitor C1 (fig. 3-3).
POWER to OFF, replace timing circuit assembly
33 on extender board.
f. Set POWER to ON.
Test 9. Minimum Current Set Test.
a. Set POWER to OFF. Determine which channel
(1) If meter reading is 7.0 volts or more; set
P O W E R to OFF, replace timing assembly board
( A 6 - c h a n n e l 1, etc.) is reading incorrectly and
Remove charging module of any good channel and
(2) If meter reading is less than 7.0 volts; dis-
i n s e r t it into the location of channel that reads
c o n t i n u e testing, s e n d b a t t e r y c h a r g e r t o n e x t
higher maintenance level.
incorrectly.
Test 11. Charging Module Overvoltage Test.
b. Set POWER to ON and press START TIME
switch.
a. Remove charging module of
bad channel (fig.
c. Set CHANNEL SELECT switch to channel
b. Remove charging module of a good channel and
that was reading incorrectly; check panel meter.
put it into basket assembly location of bad channel.
(1) If panel meter reading is 50 mA or less, set
POWER to OFF and replace charging module that
c. Set CHANNEL SELECT switch to bad chan-
nel.
d. Set POWER switch to ON and press START
Go to section V.
TIME switch. Observe panel meter.
(2) If panel meter reading is greater than 50
mA discontinue testing. Forward battery charger to
(1) If panel meter pegs, quickly set POWER
switch to OFF and discontinue testing. Send battery
next higher maintenance level.
Test 10. Timing Assembly (A12) Test.
charger to next higher maintenance.
a. Set POWER to OFF.
(2) If panel meter does not peg, replace charg-
ing module that is set aside. Go to section V.
Section IV. MAINTENANCE OF BATTERY CHARGER
(2) Perform an operational check of battery
3-13. General
charger in accordance with section V.
Repair of battery charger at direct support level is
(3) Install retainer (6) on chassis (4) and fasten
limited to replacement of items listed in paragraph
with screws (5).
3-3.
(4) Install cover (3) on chassis and fasten with
WARNING
screws (1) and washers (2).
Set POWER switch to OFF and disconnect
3-15. Power Supply Assembly (A11)
power cable from power source before per-
f o r m i n g any maintenance inside battery
Removal and installation of power supply assembly
charger.
a. Removal.
(1) Remove screws (1) and washers (2) holding
3-14. Charging Modules (A6, A7, A8, A9,
cover (3) to chassis (4). Remove cover from chassis.
and A10)
(2) Remove screws (5) holding retainer (6) to
Removal and installation of any charging module
chassis. Remove retainer.
(3) Carefully pull power supply assembly from
a. Removal.
connector.
(1) Remove screws (1) and washers (2) holding
b. Installation.
cover (3) to chassis (4). Remove cover from chassis.
CAUTION
(2) Remove screws (5) holding retainer (6) to
Be sure wiring to circuit breaker/switch,
chassis. Remove retainer.
CB1 (POWER) does not interfere, when in-
(3) Carefully pull defective charging module
stalling r e p l a c e m e n t p o w e r supply
from connector.
assembly.
b. Installation.
(1) Push replacement charging module into
(1) Push replacement power supply assembly
connector.
into connector.
3-16