4-31. REPLACEMENT OF CIRCUIT
1/2-inch open-end wrench
Flat tip screwdriver
Figures 4-5 and 4-10 for location of amplifier adapter parts.
a. Mounting adapter
b. Six captive screws (13)
and front access cover
c. Circuit breaker CB1 (10)
cover (11) and six
captive screws (13)
Set on work surface with left side
Using flat tip screwdriver, fully loosen six
captive screws (13) securing front access
cover (11) to power control chassis (10).
Remove front access cover. Inspect front
access cover, replace if required.
Using 1/2-inch open-end wrench, remove
and retain nut, IET Iockwasher, ON/OFF
plate, and locking ring securing defective
circuit breaker CB1 (10) to power control
chassis (17). Remove circuit breaker from
power control chassis.
Using soldering kit, tag and desolder wires
from leads of circuit breaker. Remove and
discard circuit breaker.
Using soldering kit, solder tagged wires
to leads of replacement circuit breaker.
Remove wire tags.
Position circuit breaker CB1 (10) into
power control chassis (17) and install
retained locking ring, ON/OFF plate,
Iockwasher, and nut. Using 1/2-inch
socket and torque wrench, secure
circuit breaker to power control chas-
sis (17). Torque nut to 19 to 21 in-lb.
Hold in place and tighten six captive
screws (13) securing front access cover
(11) to power control chassis (10).
Using torque screwdriver, torque screws
to 8 to 10 in-lb.
See figure 4-5.
See figure 4-10.
Before and after soldering,
clean wires and leads with
alcohol and cotton swabs.
These were removed in
See figure 4-5.
This was removed in