Install guide

ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Legend for Figure 3-9
1. Screw
2. Washer
3. Control and display panel
4. Display logic circuit card assembly A1
5. Display logic circuit card assembly A2
6. Keyboard and control circuit card assembly A3
7. Control and display unit cover
8. Gasket
Table 3-6. CDU Circuit Card Assembly Identification
Figure 3-9
Card
Card nomenclature and
index no.
part no.
reference designator
Part no. location on card
4,5
880805-1
Display logic circuit card
On one end of connector on component
assembly A1 and A2
side
6
880815-1
Keyboard and control circuit card
Near top edge (opposite connector end)
on
assembly A3
component side
(a)
(b)
(c)
(d)
Clean guide pin (14) threads using isopropyl
c. Ambient Temperature Thermostatic Switch. Re-
alcohol and clean, lint-free material; wipe
move and replace thermostatic switch (4, figure 3-10) as
dry.
follows:
Apply sealing compound primer (MIL-
(1) Removal.
S-22473) to guide pin (14) threads; allow to
(a) Remove two screws (l), washers (2), and
dry.
cover plate (3) securing thermostatic switch
Apply sealing compound (MIL-S-22473,
(4) to upper IMU subassembly (12). Remove
Grade C) to guide pin (14) threads.
thermostatic switch (4) far enough to pro-
vide access to soldered connections.
Install guide pin (14) in lower IMU subas-
(b) Tag and unsolder all wires connected to
sembly (13). Torque guide pin 90 to 100
thermostatic switch (4). Remove thermo-
inch-pounds.
static switch and gasket (7).
Lagend for Figure 3-10
1.
2.
3.
4.
5.
6.
7.
8.
9.
Screw
Washer
Cover plate
Thermostat switch S3
Capacitor C3
Capacitor C4
Gasket
Screw
Clamping catch
12.
13.
14.
15.
16.
17.
18.
19.
20.
Upper IMU subassembly
Lower IMU subassembly
Guide pin
Porro prism cover
Screw
Washer
Clamping catch
Retainer nut
Washer
10. Washer
21. Bolt assembly
11. Nut
22. IMU cover
3-35