TM 11-5820-890-30-4
3-30. REPLACEMENT OF POWER SUPPLY CCA.
Tools:
Soldering kit
Cross tip screwdriver, #0 point
3/16-inch nutdriver
Expendable supplies:
Alcohol
Cotton swabs
Solder
References:
Paragraph 3-26 for removal and installation of test adapter from maintenance group lid.
Figure 3-12 for illustration of power supply circuit card assembly (CCA).
ITEM
ACTION
REMARKS
REMOVAL
a. Wires
b. Four hex nuts (60), lock-
washers (61), flat washers
(62), and screws (66)
c. Four spacer sleeves (64)
d. Power supply CCA (65)
INSTALLATION
e. Wires
f. Power supply CCA (65)
g. Four hex nuts (60), lock-
washers (61), flat washers
(62), and screws (66)
Note positions of all wires soldered to
power supply CCA (65). Use soldering
kit. Desolder all wires from CCA, See
figure 3-12 (sheet 3).
Use #0 point cross tip screwdriver and
3/16-inch nutdriver. Remove and retain
four hex nuts, Iockwashers, flat washers,
and screws securing CCA to power
supply mounting bracket (63). Note
orientation of CCA’s component side
with respect to mounting bracket.
Remove and retain.
Remove and discard.
Use soldering kit. Solder all wires to cor-
rect positions on CCA.
Install four retained screws (66) through
replacement CCA and four retained spac-
er sleeves (64). Place CCA with its com-
ponent side in correct orientation on pow-
er supply mounting bracket (63) with
screws inserted through holes in bracket.
Use #0 point cross tip screwdriver and
3/16-inch nutdriver. Install and tighten
four retained hex nuts, Iockwashers, and
flat washers on four screws securing CCA
to mounting bracket.
Before and after soldering,
clean solder joints with cot-
ton swabs and alcohol.
These were removed in
steps b and c.
These were removed in
step b.
3-100
