TM 11-5820-890-30-4
13-31. REPLACEMENT OF DIODE CIRCUIT CARD ASSEMBLY (8A2A2).
Tools:
Cross tip screwdriver
Torque screwdriver
Flat tip screwdriver
Soldering kit
Expendable Supplies:
Cotton swabs
Alcohol
Solder
References:
Paragraph 13-17 for removal and installation of the heat sink assembly (8A1).
ITEM
ACTION
REMARKS
REMOVAL
a.
Heat sink assembly (2)
b.
Power supply adapter
chassis (1)
c.
Four screws, flat
washers, and
Iockwashers (5)
d.
Diode circuit (4) wires
e.
Diode circuit (4)
INSTALLATION
f.
Diode circuit (4)
g.
Diode circuit (4) wires
h.
Four screws, flat
washers, and
Iockwashers (5)
i. Heat sink
assembly (2)
Remove and retain heat sink assembly
from power supply adapter chassis (1).
See figure 13-2.
Set upside down on work surface with
front toward you. See figure 13-6.
Use cross tip screwdriver. Remove and
inspect four screws and flat washers
securing the circuit to the chassis. If
damaged, obtain replacement. Discard
Iockwashers.
Tag location of all wires soldered to A2
circuit near TB1 terminal board (6). Use
soldering kit. Desolder each wire from
the circuit.
Remove defective circuit and send it to
supply for disposition.
Obtain replacement circuit and four
Iockwashers.
Use soldering kit. Solder tagged wires to
terminals on the circuit, and remove wire
tags.
Use cross tip screwdriver. Install and
tighten four screws, flat washers, and
replacement Iockwashers securing the
circuit to the chassis.
Install retained heat sink assembly on
power supply adapter chassis (1).
Refer to paragraph 13-17
for heat sink removal.
Before and after soldering,
clean wires and terminals
with alcohol and cotton
swabs.
Refer to paragraph 13-17
for heat sink installation.
13-51
