Install guide

ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Legend for Figure 4-14
1. Washer
20. Flexible harness assembly
2. Screw
21. Fault indicator DS1
3. Computer cover
22. Lockwasher
4. CDU mount bracket
23. Nut
5. Catch strike
24. Terminal lug
6. Screw
25. Elapsed time indicator M1
7. Solid state memory unit A1
26. Spacer
7.1 Core memory unit A1
27. Screw
8. Screw
28. A/D converter circuit card assembly A11
9. Wedgelock
29. I/O discrete circuit card assembly A9
10. Computer subassembly
30. Platform I/O circuit card assembly A8
11. Washer
31. I/O controller circuit card assembly A7
12. Screw
32. Data buffer circuit card assembly A6
13. Air deflector
33. Control no. 3 circuit card assembly A5
14. Screw
34. Control no. 2 circuit card assembly A4
15. Washer
35. Control no. 1 circuit card assembly A3
16. Guide pin
36. 16-bit data circuit card assembly A2
17. Captive screw assembly
37. RFI gasket
18. Computer power supply
38. Thermostatic switch S1
19. RFI gasket
2.
3.
4.
Prepare and solder tagged wires to
sparks. Avoid prolonged or repeated inha-
elapsed time indicator M1 (25). Clean
lation of vapors.
solder joints.
1.
Place computer cover (3) on computer
subassembly (10); align mounting holes.
Torque 16 screws (2) and washers (1)
securing computer cover (3) to computer
2.
subassembly (10) 16 inch-pounds using
procedures described in paragraph 3-11.
(3) Thermostatic switch S1. Remove and replace
3.
thermostatic switch S1 (38, figure 4-14) as follows:
(a) Removal.
1. Tag and unsolder wires connected to ther-
4.
mostatic switch S1 (38).
Clean thermostatic switch S1 (38) threads
and engaging threads in chassis using iso-
propyl alcohol.
Use clean lint-free cloth
to apply alcohol and to wipe parts.
Apply sealing compound (MIL-S-22473,
Grade H) to threads of thermostatic
switch S1 (38).
Install thermostatic switch S1 (38) by
screwing into threaded mounting hole in
chassis.
Prepare and solder tagged wires to ther-
mostatic switch S1 (38). Clean solder
joints.
2. Remove thermostatic switch S1 (38) by
unscrewing from chassis.
(4) Computer flexible harness assembly repair.
Damaged printed circuitry on the computer flexible
(b) Replacement.
harness assembly (20, figure 4-14) shall be repaired by
splicing with haywires.
Repair flexible harness assembly
(20) as follows:
(a) Remove 16 screws (2) and washers (1) secur-
ing computer cover (3) to computer subas-
sembly (10). Remove computer cover.
Isopropyl alcohol is flammable and gives
(b) Remove circuit card assemblies (28 thru 36).
off harmful vapors. Use only in well-ven-
tilated area away from open flames and
(c) Remove memory unit (7 or 7.1).
Change 1
4-133