TM
9-4931-436-14&P
(4) Carefully fold back retainer
(9) Disconnect Jl, J2, J3, and J4
bar assembly. Ensure that cables on top
from PWB A1.
of retainer bar assembly are not damaged.
(10) Remove 18 screws (62), 18
(5) Remove output logic PWB (21)
flat washers (2), and cable clamps
from connector on PWB A2.
(70) securing PWB Al to front panel
t. Output Logic PWB Assembly Replace-
(34). Carefully remove PWB A1.
ment (fig. C-2).
(11) Use a grounded soldering iron
(1) Install output logic PWB (21)
(25 watts). Unsolder detector from
on connector on PWB A2 (25).
PWB A1. Remove detector and insulator.
(2) Connect J9, J10, Jll, and J12
Detector Replacement (fig. C-2).
r.
to PWB A2.
(3) Apply primer (MIL-S-22473,
(1) Refer to figure 5-l. Use a
grade T) and Locking compound (MIL-S-
grounded soldering iron (25 watts).
22473, grade C) to threads of all screws.
Carefully solder detector and insula-
(4) Install retainer bar assembly
tor to PWB A1 (9).
(2) Apply primer (MIL-S-22473,
(19) on standoffs (20). Secure with
two flat washers (2) and two screws (1).
grade T) and locking compound (MIL-S-
Torque to 6-8 in.-lb.
22473, grade C) to threads of all
(5) Replace panel assembly (refer
screws.
(3) Install PWB A1 on front panel
U. Microprocessor Logic PWB Assembly
(34). Secure with 18 flat washers (2)
and 18 screws (62). Torque to 6-8
A2A3 Removal (fig. C-2). To remove
in.-lb.
microprocessor logic PWB assembly follow
(4) Connect Jl, J2, J3, and J4 to
instructions for removing output logic
PWB A1.
PWB assembly, paragraph s.
(5) Install column preamp PWB
Microprocessor Logic PWB Assembly
V.
assemblies (4) in connectors on PWB A1.
A2A3 Replacement (fig. C-2). To replace
(6) Install retainer bar assembly
microprocessor logic PWB assembly follow
(3) on PWB A1. Secure with two flat
instructions for replacing output logic
washers (2) and two screws (1). Torque
PWB assembly, paragraph t.
to 6-8 in-lb.
W . Timing Logic-PWB Assembly A2A2
(7) Install AGC PWB AlA13 (6) in
Removal (fig. C-2). To remove timing
connector on PWB A1.
logic PWB assembly follow instructions
(8) Install row preamp PWB assem-
for removing output logic PWB assembly,
blies (7) in connectors in PWB A1.
paragraph s.
(9) Install retainer bar assembly
Timing Logic PWB Assembly A2A2
(5) on PWB A1. Secure with two flat
Replacement (fig. C-2). To replace
washers (2) and two screws (1). Torque
timing Logic PWB assembly follow in-
structions for replacing output logic
to 6-8 in.-lb.
(10) Install screws on four cable
PWB assembly, paragraph t.
clamps (73) securing cables to PWB A1.
Input Logic PWB Assembly A2A1
y.
(11) Replace panel assembly (refer
Removal (fig. C-2). To remove input
logic PWB assembly follow instructions
S. Output Logic PWB Assembly Removal
for removing output logic PWB assembly,
paragraph s.
(1) Remove panel assembly (refer
Input Logic PWB Assembly A2A1
Z.
Replacement (fig. C-2). To replace
(2) Disconnect J9, JlO, Jll, and
input logic PWB assembly follow instruc-
J12 from PWB A2 (25).
tions for replacing output logic PWB
(3) Remove two screws (1) and two
assembly, paragraph t.
flat washers (2) securing retainer bar
aa.
Digital Motherboard (A2) Assembly
assembly (19) to two standoffs (20).
Removal (fig. C-2).
6-4
