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TM 11-5820-890-30-5
4-33. REPLACEMENT OF RELAY K1.
Tools:
Cross tip screwdriver
Torque screwdriver
Soldering kit
Flat tip screwdriver
Expendable Supplies:
Sealing compound, grade H
Solder
Cotton swabs
Alcohol
References:
Figures 4-5 and 4-10 for location of amplifier adapter parts.
ITEM
ACTION
REMARKS
REMOVAL
a. Mounting adapter
Set on work surface with left side
toward you.
b. Rear access cover (12)
Using flat tip screwdriver, fully loosen six
captive screws (13) securing rear access
cover (12) to power control chassis (11).
Remove and inspect rear access cover
replace if required.
c. Relay K1 (31)
d. Diode CR6 (28)
e. Wires
INSTALLATION
f. Wires
g. Diode CR6 (28)
h. Relay K1 (31)
Using cross tip screwdriver, remove and
retain two screws (29), Iockwashers (23),
and terminal lugs (30) securing defective
relay K1 (31) to two electrical posts (27)
on power control chassis (17).
Note polarity. Using soldering kit, desolder,
remove, and retain diode CR6 (28) from
defective relay K1 (31).
Remove insulation sleeving as required.
Using soldering kit, tag and desolder wires
from leads of relay K1 (31). Remove and
discard relay K1.
Using soldering kit, solder tagged wires to
leads of replacement relay K1 (31).
Remove wire tags. Replace insulation
sleeving as required.
Note polarity. Using soldering kit, solder
retained diode CR6 (28) to leads X1
and X2 of relay K1 (31).
Position replacement relay K1 (31) on
two electrical posts (27) on power control
chassis (17). Using cross tip screwdriver,
install two retained screws (29), lockwash-
ers (23), and terminal lugs (30) securing
relay K1 to power control chassis (17).
See figure 4-5.
See figure 4-10.
Before and after soldering,
clean wires and leads with
alcohol and cotton swabs.
Before and after soldering,
clean solder joints with
alcohol and cotton swabs.
Apply one drop of grade H
sealing compound to
threads of two retained
screws before installation.
4-128
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