4-37. REPLACEMENT OF DIODE CR6. Continued
e. Diode CR6 (28)
Noting polarity, solder replacement diode
CR6 (28) to leads X1 and X2 of retained
relay K1 (31).
f. Relay K1 (31)
Position retained relay K1 (31) on two
electrical posts (27) on power control
chassis (17). Using cross tip screwdriver,
install two retained screws (29), lock-
washers (23), and terminal lugs (30)
securing relay K1 (31) to power control
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.
4-38. REPLACEMENT OF TERMINAL BLOCK TB2.
Cross tip screwdriver
Flat tip screwdriver
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.
This was removed in
See figure 4-5.
a. Mounting adapter
Set on work surface with left side toward
b. Six captive screws (13)
Using flat tip screwdriver, fully loosen six
See figure 4-5.
and rear access cover
captive screws (13) securing rear access
cover (12) to power control chassis (10).
Remove and retain rear access cover.
Tag wires of terminal block TB2 (32).
See figure 4-10.
Using flat tip screwdriver, remove and
retain four screws securing shorting bar
(39) and terminal lugs (33) with tagged
wires to terminal block TB2 (32).
d. Terminal block TB2 (32)
Using cross tip screwdriver, remove and
retain four screws (35), Iockwashers (23),
and flat washers (24) securing defective
terminal block TB2 (32) to power control
chassis (17). Remove and discard
defective terminal block TB2.