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TM 11-5820-890-30-5
15-27. REPLACEMENT OF U1 VOLTAGE REGULATOR. Continued
ITEM
ACTION
REMARKS
REMOVAL Continued
b. Battery tray
subassembly (1)
c. Two screws, flat washers,
Iockwashers, and
shouldered washers
(9) and (11)
d. U1 voltage regulator (10)
leads
e. U1 voltage regulator (10)
wires
f.
Mounting pad
g. U1 voltage regulator (10)
INSTALLATION
h. U1 voltage regulator (10)
i.
Mounting pad
j.
U1 voltage regulator (10)
leads
k. Two screws, flat washers,
Iockwashers, and
shouldered washers
(9) and (11)
l.
Mounting plate
assembly (2)
Set upside down on work surface with
left side toward you.
Use cross tip screwdriver. Remove and
inspect two screws, flat washers,
Iockwashers, and shouldered washers
securing U1 voltage regulator (10) with
mounting pad and U1-3 terminal lug to
the chassis. If damaged, obtain
replacement. Remove and retain
terminal lug with wire soldered to it.
See figures 15-5 and 15-6.
Maneuver U1 voltage regulator so
U1-1 and U1-2 leads on underside
are accessible, and tag location of
each wire soldered to leads.
Use long nose pliers and soldering equip-
ment. Desolder tagged wires from U1
voltage regulator leads.
Remove and inspect for damage.
If damaged, obtain replacement.
Remove and discard.
Obtain replacement U1 voltage regulator.
Place retained mounting pad on underside
of voltage regulator.
Use long nose pliers and soldering equip-
ment. Attach and solder tagged wires to
U1-1 and U1-2 leads on voltage regulator,
and remove wire tags.
Use cross tip screwdriver. Install two
retained screws, flat washers, lock-
washers, and shouldered washers
securing U1 voltage regulator (10)
with retained mounting pad and U1-3
terminal lug, with wire soldered to it,
Inspect each screw and its
threaded screw insert to
determine if any are defec-
tive. If a screw is stripped,
do not replace its
threaded screw insert.
This was removed in step f.
Before and after soldering,
clean wires and leads with
alcohol and cotton swabs.
Inspect each screw and its
threaded screw insert to
determine if any are defec-
tive. If a screw is not
stripped but will not tighten,
refer to paragraph 15-35 for
to the chassis.
removal and replacement of
threaded screw inserts.
Install retained mounting plate assembly
Refer to paragraph 15-20
on battery tray subassembly (1).
for installation of mounting
plate assembly.
15-30
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