ARMY TM 5-6675-238-14
MARINE CORPS TM 08839A-14/1
(2)
(3)
(4)
(5)
and secure hinged side to chassis (62) with six
screws (60) and washers (59).
Connect connector A1P2 (102, figure 8-6,
sheet 3) to connector J21 (101) and tighten
jackscrews.
Connect connector A1P1 (63) to connector
J20 (64) and tighten jackscrews.
Swing assembly A1 (61, figure 8-6, sheet 1) to
closed position; install six screws (57) and
washers (56) to secure side away from hinge to
chassis (62).
Install SPU in instrument case (58) and secure
to panel assembly (2) with 20 screws (43) and
washers (44).
8-20. Logic No. 2 Electronic Component Assembly A2
Removal and Replacement. See figure 8-6 and remove
and replace logic no. 2 electronic component assembly
A2 (52, figure 8-6, sheet 1) (referred to an this para-
graph as assembly A2) as follows:
N O T E
When SPU is placed on its side, block up
back end.
a. Removal.
(1)
(2)
(3)
(4)
(5)
Press pressure relief valve (55) on bottom of
instrument case; then remove 20 screws (43)
and washers (44) securing instrument case (58)
to panel assembly (2). Remove SPU from in-
strument case.
Position SPU so that hinge of assembly A2
(52) is vertical; remove six screws (51) and
washers (50) securing assembly A2 to chassis
(62) on side away from hinge; swing assembly
A2 out on hinge.
Loosen jackscrews and disconnect connector
A2P1 (129, figure 8-6, sheet 4) from connector
J22 (128).
Loosen jackscrews and disconnect connector
A2P2 (126) from connector J23 (127).
Remove six screws (54, figure 8-6, sheet 1) and
washers (53) securing Assembly A2 (52) to
chassis (62) on hinged side; remove assembly
A2.
b. Replacement.
(1) Position SPU so that hinge of assembly A2
(52) will be horizontal when assembly A2 is in
position to be installed; install assembly A2
and secure hinged side to chassis (62) with six
screws (60) and washers (59).
(2)
(3)
(4)
(5)
Connect connector A2P2 (126, figure 8-6,
sheet 4) to connector J23 (127) and tighten
jackscrews.
Connect connector A2P1 (129) to connector
J22 (128) and tighten jackscrews.
Swing assembly A2 (52, figure 8-6, sheet 1) to
closed position: install six screws (51) and
washers’ to secure side away from hinge to
chassis (62).
Install SPU in instrument case (58) and secure
to panel assembly (2) with 20 screws (43) and
washers (44).
8-21. Logic No. 3 Electronic Component Assembly A3
Removal and Replacement. See figure 8-6 and remove
and redate logic no. 3 electronic component assembly
A3 (45, figure 8-6, sheet 1) (referred to in this paragraph
as assembly A3) as follows:
N O T E
When SPU is placed on its side, block up
back end.
a. Removal.
(1)
(2)
(3)
(4)
(5)
(6)
Press pressure relief valve (55) on bottom of
instrument case; then remove 20 screws (43)
and washers (44) securing instrument case (58)
to panel assembly (2). Remove SPU from in-
strument case.
Position SPU so that hinge of assembly A3
)
(45) is vertical; remove six screws (49 and
washers (48) securing assembly A3 to chassis
(62) on side away from hinge; swing assembly
A3 out of hinge.
Loosen jackscrews and disconnect connector
A3P1 (66, figure 8-6, sheet 3) from connector
J24 (65).
Loosen jackscrews and disconnect connector
A3P2 (93) from connector J25 (92).
Loosen jackscrews and disconnect connector
A3P3 (97) from connector J26 (96).
Remove six screws (47, figure 8-6, sheet, 1) and
washers (46) securing assembly A3 (45) to
chassis (62) on hinged side; remove assembly
A3.
b. Replacement.
(1) Position SPU so that hinge of assembly A3
(45) will be horizontal when assembly A3 is in
position to be installed; install assembly A3
and secure hinged side to chassis (62) with six
screws (47) and washers (46).
8-90
U.S. GOVERNMENT PRINTING OFFICE: 1994 - 555-028/0004
