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TM 11-5820-890-30-5
4-35. REPLACEMENT OF ZENER
Tools:
Flat tip screwdriver
Cross tip screwdriver
Expendable Supplies:
Cotton swabs
References:
DIODE VR1/VR2.
Torque screwdriver
Soldering kit
Solder
Alcohol
Figures 4-5 and 4-10 for location of amplifier adapter parts.
ITEM
ACTION
REMARKS
REMOVAL
a. Mounting adapter
b. Rear access cover (12)
c. Two screws (22), flat
washers (24), and
Iockwashers (23)
d. Zener diode VR1/VR2 (18)
INSTALLATION
e. Zener diode VR1/VR2 (18)
f. Two screws (22), flat
washers (24), and
Iockwashers (23)
g. Rear access
cover (12)
Set on work surface with left side
toward you.
Remove and retain.
See figure 4-5.
Refer to paragraph 4-33 for
removal procedures.
Using cross tip screwdriver, remove
and retain two screws (22), flat washers
(24), and Iockwashers (23) securing
mounting bracket (21) to power control
chassis (17).
Note polarity. Using soldering kit, desolder
See figure 4-10.
defective Zener diode VR1/VR2 (18) from
terminal studs (19) on mounting bracket
(21). Remove and retain insulation sleeving.
Remove and discard defective Zener
diode VR1/VR2 (18).
Install retained insulation sleeving on
replacement Zener diode VR1/VR2 (18).
Note polarity. Using soldering kit, solder
replacement diode to terminal studs (19)
on mounting bracket (21).
Using cross tip screwdriver, install
mounting bracket (21) to power
control chassis (17) using two retained
screws (22), flat washers (24), and
Iockwashers (23).
Hold in place and tighten six captive
screws (13) securing rear access cover
(12) to power control chassis (10),
Using torque screwdriver, torque screws
to 8 to 10 in-lb.
Before and after soldering,
clean leads with alcohol
and cotton swabs.
These were removed in
step c.
See figure 4-5.
This was removed in
step b.
4-131
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