TM 11-6130-381-81-14
ponents, detach the front panel from the
a . R e m o v e and install components that are
chassis and pull the panel as far away from
soldered with a pencil-type soldering iron having a
2 5 - w a t t maximum capacity. The battery charger is
t h e chassis as the cabling will allow by
removing the six seal screws that attach
transistorized; if the soldering iron must be used
w i t h ac voltage, use an isolating transformer
t h e front panel to the two chassis angle
between the soldering iron and the line. Do not we
brackets (using an off-set screwdriver). The
a soldering gun; damaging voltages can be induced
front panel of the battery charger is
in the circuit components.
separated from the chassis for access to the
b. Before a part is unsoldered, note the position
c o m p o n e n t s of the printed circuit board
w h e n it is installed in the chassis (for
switch, has a number of connections tag each of
troubleshooting purposes), or components
t h e leads to ensure proper connections when
mounted on the front panel (for
replacing the part. Be careful not to damage other
troubleshooting, repair, or replacement).
leads by pulling or pushing them out of the way.
Detach the front panel from the chassis as follows:
c. W h e n s o l d e r i n g t r a n s i s t o r l e a d s ,
solder
a. Remove the battery charger chassis from its
quickly wherever wiring permits, use a heat Sink
b. Using an off-set screwdriver, remove the six
(such as a long-nosed pliers) between the soldered
joint and the transistor. Use the same length and
seal screws (three located in line with each handle)
dress of transistor leads as used originally.
that attach the front panel to the angle brackets.
d. Make well soldered connections; a carelessly
c . Carefully pull the top of the front panel
forward and down as far as the panel-to-chassis
soldered joint may create a new trouble, and is one
of the most difficult troubles to isolate. Be careful
cabling will allow without damaging the cable (fig.
not to allow drops of solder to fall into the
d. All components on the chassis, at the back of
equipment; this action may cause short circuits.
the front panel, and on the printed circuit board
e. When replacing circuit breakers CB6001 or
will be accessible.
following terminals must be coated with non-acidic
5-9. Removal of Control Circuit Card Assembly
a d h e s i v e such as Silastic RTV 162 and primer
a. Remove
subassembly from
its case (para
SS4155 (General Electric) or equivalent:
Terminal(s)
Parr
b. Remove the two thumb screws which secure
A, B
CB6001
t h e retaining bar of the control circuit card
A, B
CB6002
C, N. O., N.C.
S6005
the retaining bar up, loosening the control circuit
1 through 4, 14 and 15
T6OO1
c a r d assembly from J6003. Be careful not to
f. When removing stud mounted diodes CR6005
d a m a g e the components of the printed circuit
board.
Q6004, be careful not to damage the mica washers
5-10. Removal of 230 Vac Conversion Assembly
a n d centering bushings or burr the contacting
surfaces. Replace my damaged mica washers and
Remove conversion assembly from the cover as
follows:
c e n t e r i n g bushings. Apply silicon grease, com-
a. Press the pressure relief valve button.
pound No. 5 (Dow Corning) or equivalent, to the
b. Unlatch the six latches and open the cover of
mica washers prior to installation. Place smooth
the case.
a i d e of metal washers against the mica when
c. Uncoil the input power cable from inside the
replacing the devices.
g. If robber bumpers supporting J6003 require
cover of the case.
d. Remove the four mounting screws and flat
r e p l a c e m e n t , note position of bumpers prior to
washers and lift out the assembly.
removal. Apply primer 1007P and adhesive 1177
( U n i t e d Shoe Machine Corp.), or equivalent, to
5-11. Parts Replacement Techniques
three contacting surfaces of the replacement bumper
The majority of parts comprising the battery
and cement in place.
C - can be reached and replaced easily without
h. If the knurled gland nut is removed from the
special procedure. The following procedure
body pipe mounted to the front panel during repair
provide general replacement instruction and
o f the "AC POWER CORD" coat the threads
s p e c i a l instructions for those items utilizing
upon replacement with primer (grade N, form R)
s p e c i f i c materials when replacement is required
and sealing c o m p o u n d ( g r a d e E V ) p e r
R e f e r to figure 5-1 through 5-3 for location of
MIL-S-22473.
parts.
5-8