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TM 11-5820-890-30-5
4-74. REPLACEMENT OF POWER SUPPLY HEATSINK.
Tools:
Flat tip screwdriver
Spanner wrench
Cross tip screwdriver
Spanner adapter
Torque screwdriver
1-1/16-inch socket
Soldering kit
Expendable Supplies:
Sealing compound, grade H
Cotton swabs
Silicone compound
Solder
References:
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4-51 for removal and installation of Power Supply (5A1).
4-53 for removal and installation of Transistor Q1.
4-54 for removal and installation of Connector J9.
Adjustable wrench
Socket wrench
Hex socket
Alcohol
ITEM
ACTION
REMARKS
REMOVAL
a. Access cover (1)
b. Eight screws (5) and
flat washers
c. Three screws (6), flat
washers, and cable
clamps (7)
d. Connector W3P3
e. Connector W1P2 (1)
f. 20 captive screws
g. Heatsink assembly (11)
Using flat tip screwdriver, fully loosen 15
captive screws (2) securing access cover
(1) to audio amplifier chassis (3). Remove
and retain.
Using cross tip screwdriver, remove and
retain eight screws (5) and flat washers
securing 1-Watt audio amplifier CCA (4)
to audio amplifier chassis (3).
Using cross tip screwdriver, remove and
retain three screws (6), flat washers, and
cable clamps (7) securing 1-Watt audio
amplifier CCA (4) and cables to audio
amplifier chassis (3).
Loosen two jackscrews and disconnect con-
nector W3P3 (2) from 1-Watt audio amplifier
CCA connector J1.
Loosen two jackscrews and disconnect con-
nector W1P2 (1) from 1-Watt audio amplifier
CCA connector J2.
Using flat tip screwdriver, fully loosen 20
captive screws securing heatsink assembly
(11) to power supply cover.
Lay heatsink assembly on its fins.
See figure 4-14.
See figure 4-14.
See figure 4-14.
CAUTION
Carefully lay on fins to
ensure casting does not
rest on components inside
power supply cover.
4-195
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