Section III. REPAIR OF LASER POWER SUPPLY CONTROL C-9135/VVG-1 (A77)

TM 9-1240-369-34

(4) Install shipping cover (19) by performing

machined surfaces for conditions that may prevent

steps (1) and (21 in reverse order.

alinement with mating parts.

c. Check electrical wiring for chafed or broken

wires and bad solder connections.

3-4. Inspection of R/T Control Unit (A75)

d. Inspect machined sealing surfaces for scratches,

a. Inspect the general condition of all par Check for

debris or excessive lubricant that may prevent proper

wear or other conditions indicating deterioration.

sealing.

b. Inspect switches, controls, gears, bearings, and

screws for corrosion; check switches, controls, gears

and bearings for proper mechanical operation; check

Section III. REPAIR OF LASER POWER SUPPLY CONTROL C-9135/VVG-1 (A77)

KEY to fig. 3-2:

3-5. Disassembly of Power Supply Control Unit

1. Screw-N AS 1635-08-12

(A77).

1a. Screw--PFN access screw

The power supply control unit is to be

2. Washer-AN960C8

disassembled only to the point where the damaged

3. Access cover assembly-11737860

components can be removed and replaced. During

4. Access cover gasket-11738892

disassembly, it is recommended that disassembled items

5. Screw-NAS1635-06-8

be indexed in order of removal. Assembly can then be

6. Washer-NAS620C6

accomplished by replacing items in reverse index order.

7. Preregulator cover-11738839

After any repair. the power supply control unit must be

8. Screw locking assembly-1139036

purged with dry nitrogen gas in accordance with TM 9-

9. Connector P2-M24308/1-1

2350-230-12.

10. Preregulator electronic component assembly

a. Replacement of Access Cover Gasket (see fig.

A77A10-11737807

3-2).

11. Preregulator gasket-11738840

(1) Remove six screws (1), six washers (2),

12. Screw-NAS1635-06-5

power supply control unit access cover assembly (3),

13. Washer-NAS620C6

and access cover gasket (4). Inspect screws and

14. -1600 V power supply circuit card assembly

washers for damage and replace as necessary.

A77A1-10559335.

(2) Lubricate new access cover gasket (4) by

15. Low voltage power supply circuit card assembly

applying a thin, uniform film of grease, MIL-G4343, to the

A 77A2-10559325

high point on the head of the gasket. Do not apply so

16. Shield board-10559309

much grease that it fills the grooves on either side of the

17. Select logic circuit card assembly A-77A3-

bead. Apply by hand to both sides of the gasket.

10559285

(3) Install new access cover gasket by

18. Interface circuit card assembly A77A3-11737802

performing step (1) in reverse order.

19. Reply gating circuit card assembly A77A4-

10559295

20. Counters circuit card assembly A77A5-

10559305

21. Screw-NAS1635-06-8

22. PFN charge power supply A77A9-10559345

23. Nut-part of item 29

24. Lockwasher-part of item 29

25. Terminal lug-MS25036-154

26. Washer-part of item 29

27. Terminal-part of item 29

28. Screw-MS16997-20

29. PFN A77Z1-10559361

30. PFN gasket-11737801

31. Screw-NAS1635-06-5

:12. Washer-NAS620C6

33. Electronic filter component assembly A77A8-

11737811

34. Screw locking assembly-11739036

35. Connector P1-M24308/1-1

36. Housing-11738835

3-4