Install guide

ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
4. Remove + 20V converter-regulator cir-
cuit card assembly A2 (50) from chassis
(22).
(b) Replacement.
1.
2.
3.
4.
5.
6.
Insert + 20V converter-regulator circuit
card assembly A2 (50) into slot in chassis
(22) and carefully guide it into place.
Just before the connectors mate, check
that the + 20V converter- regulator cir-
cuit card assembly A2 (50) is free in its
guides and its top edge is parallel to the
chassis (22) top surface.
Seat + 20V converter-regulator circuit
card assembly A2 (50) by applying moder-
ate, even pressure at both corners. If card
does not readily seat, pull the card out
and inspect for bent or broken connector
pins.
Tighten four captive screws (49) securing
card (50) to chassis (22).
Ti hten four screws (48) in wedgelocks
(47) until wedges are tight against edge of
slots.
Secure bottom cover (45) and gasket (46)
to chassis (22) with 25 screw; (43) and
washers (44). Torque screws to 9 inch-
pounds using procedures described in par-
agraph 3-11.
(3) 28V converter-regulator circuit card assembly
A3. Remove and replace 28V converter-regulator cir-
cuit card assembly A3 (63, figure 4-19, sheet 3) as
follows:
(a) Removal.
1.
2.
3.
4.
Loosen 25 captive screws (43) and wash-
ers (44) securing bottom cover (45) and
gasket (46) to chassis (22); remove cover
and gasket.
Remove two screws (56 and 58) securing
terminal lugs (55 and 57) to filter circuit
card assembly A4 (68); tag and remove
terminal lugs.
Loosen four captive screws (62) securing
28V converter-regulator circuit card as-
sembly A3 (63) to chassis (22).
Loosen four screws (66) securing wedge-
locks (67) until 28V converter-regulator
circuit card assembly A3 (63) is free.
NOTE
It maybe necessary to loosen the wedges
if they become frozen. This can be done
by simply tapping the wedge screws
downward until the bottom wedges be-
come loose.
5. Remove 28V converter-regulator circuit
card assembly A3 (63) from chassis (22).
(b) Replacement.
1.
2.
3.
4.
5.
Insert 28V converter-regulator circuit
card assembly A3 (63) into slot in chassis
(22) and carefully guide it into place.
Just before the connectors mate, check
that the 28V converter-regulator circuit
card assembly A3 is free in its guides and
its top edge is parallel to the chassis (22)
top surface.
Seat 28V converter-regulator circuit card
assembly A3 (63) by applying moderate,
even pressure at both corners. If card
does not readily seat, pull the card out
and inspect for bent or broken connector
pins.
Tighten four captive screws (62) securing
card (63) to chassis (22).
Tighten four screws (66) in wedgelocks
6.
7.
(67) until wedges are tight against edge of
slots.
Reinstall two terminal lugs (55 and 57) to
filter circuit card assembly A4 (68) with
screws (56 and 58).
Secure bottom cover (45) and gasket (46)
to chassis (22) with 25 captive screws (43)
and washers (44). Torque screws to 9
inch-pounds using procedures described
in paragraph 3-11.
(4) Filter circuit card assemblv A4. Remove and
replace filter circuit card assembly A4 (68, figure 4-19,
sheet 3) as follows:
(a) Removal.
1. Loosen 25 captive screws (43) and wash-
ers (44) securing bottom cover (45) and
gasket (46) to chassis (22); remove cover
and gasket.
2. Remove two screws (56 and 58) securing
terminal lugs (55 and 57) to filter circuit
card assembly A4 (68); tag and remove
terminal lugs.
3. Loosen four screws (64) securing wedge-
locks (65) until filter circuit card assembly
A4 (68) is free.
NOTE
It may be necessary to loosen the wedges
if they become frozen. This can be done
by simply tapping the wedge screws
4-160
*U.S. GOVERNMENT PRINTING OFFICE: 1994- 555-028/00048