TM 11-6130-392-34
(2) Multimeter instructions for settings are in-
(1) Perform troubleshooting test procedures
cluded in text.
listed in table 3-3.
(2) Perform fault isolation test procedures con-
tained in paragraph 3-12, when required by a table
b. Special tools. Extender boards are used to test
printed wiring/board assemblies. Remove printed board
3-3 instruction.
assembly, to be tested, from the battery charger in
(3) Test the battery charger, after replacing a
faulty component, by using test procedures listed in
accordance with section IV. Push extender board into
connector in the battery charger, and plug the printed
section V.
wiring/board assembly into other end of extender
board. R e t u r n acceptable printed wiring/board
c. Test point locations. When test procedures re-
assemblies to same location, or replace in accordance
quire connection of a test probe to terminals or test
with section IV, if faulty.
points in the battery charger, refer to illustrations
referenced and identified, as follows:
A11, power supply assembly (fig. 3-4).
3-10. Battery Charger, Preparation for
A12, timing circuit assembly (fig. 3-6).
Testing
A13, display module U1, U2, U3 sockets (fig. 3-7).
A6-A10, charging modules (fig. 3-8).
TB1, terminal board or C1, capacitor (fig. 3-3).
Battery charger, typical troubleshooting waveform
from chassis (4) by removing screws and washers (1
and 2).
b. Retain interlock switch S6 (5) in closed posi-
tion, by holding switch down using a heavy rubber
band as wrapper.
CAUTION
c. Remove screws (6) holding retainer (7) to
chassis and remove retainer.
d. C o n n e c t R E M O T E B A T T E R Y j a c k s ( 8 )
Do not short adjacent terminals together
together, using clip leads, as follows:
or to ground when connecting test probe.
(1)
Channel
1,
red
to
black
(2)
Channel
2,
red
to
black
3-9. Use of Equipment and Special Tools
(3)
Channel
3,
red
to
black
a. Equipment.
(4)
Channel
4,
red
to
black
(1) Oscilloscope AN/USM-281 is recommended.
(5)
Channel
5,
red
to
black
Set controls as indicated in TM 11-6625-1703-15. Use
Channel A to observe all waveforms, unless otherwise
e. Set all CURRENT SET switches (9) to 50 mA
instructed in text. The circuit test point, sweep time, and
position, and turn all FINE ADJ controls (10) fully
vertical sensitivity specifications are included with the
counterclockwise.
waveform.
Change 1 3-2.1/(3-2.2 blank)
