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TM 11-5820-890-30-5
15-24. REPLACEMENT OF R1 RESISTOR. Continued
ITEM
ACTION
REMARKS
INSTALLATION
f. R1 resistor (1)
g. Two screws, flat washers,
and Iockwashers (2)
h. R1 resistor (1) wires
i.
Mounting plate
assembly (2)
Obtain replacement R1 resistor.
Use cross tip screwdriver. Install two
retained screws, flat washers, and
Iockwashers securing R1 resistor (1)
to chassis.
Use long nose pliers and soldering equip-
ment. Attach and solder each tagged
wire to correct lead of resistor, and
remove wire tags.
Install retained mounting plate assembly
on battery tray subassembly (1).
These were removed in
step d.
Before and after soldering,
clean wires and leads with
alcohol and cotton swabs,
Refer to paragraph 15-20
for installation of mounting
plate assembly.
15-25.
Tools:
REPLACEMENT OF VR1 ZENER DIODE.
Cross tip screwdriver
Soldering kit
Long nose pliers
Soldering aid
Expendable Supplies:
Solder
Alcohol
References:
7/16 inch open-end wrench
Heat sink
Cotton swabs
Paragraph 15-20 for removal and installation of mounting plate assembly.
ITEM
ACTION
REMARKS
REMOVAL
a. Mounting plate
Remove and retain.
Refer to paragraph 15-20
assembly (2)
for removal of mounting
plate assembly.
b. Battery tray
Set upside down on work surface with
subassembly (1)
left side toward you.
c. VR1 zener diode (3)
Use long nose pliers and soldering equip-
ment. Desolder wire from terminal on
wire
zener diode. See figures 15-5 and 15-6.
d. Hex
and
e. VR1
nut, flat washer,
Use 7/1 6 inch open-end wrench. Remove
Iockwasher (4)
and inspect hex nut, flat washer, and
Iockwasher securing VR1 zener diode to
chassis. If damaged, obtain replacement.
zener diode (3)
Remove and discard.
15-27
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