CHAPTER 4 OPERATOR'S MAINTENANCE INSTRUCTIONS

TM 11-405-10

CHAPTER 4

OPERATOR'S MAINTENANCE INSTRUCTIONS

31. Scope of Operator's Maintenance

Operator's maintenance for the processing set consists

Item

Maintenance procedure

of the following:

a. Preventive maintenance (par. 33).

essing set with an air syringe and lint-free

b. Troubleshooting

using

equipment

cloth. If necessary, clean metal components

performance checklist (par. 35).

with a lint-free cloth slightly moistened with

c. Replacement of defective lamps (par. 36).

Cleaning Compound.

Warning: Cleaning Compound is flammable

d. Checking electrical connections (par. 14).

and its fumes are toxic

Do not use near

32. Tools and Materials Required

a flame; provide adequate ventilation.

a. Tools.

Check the timers (continuous and interval) for

(1) Camel's-Hair Brush TL72.

accurate timing

Examine the controls

(2) Camel's-hair brush (SigC stock No.

and pointers for looseness.

6Z1451).

Hand-tighten accessible screws, nuts, and bolts.

b. Materials.

Refer to item 2 above.

(1) Lint-free cloth.

For lubricating procedure for the enlarger, refer

(2) Lens tissue.

to its applicable technical manual listed in

(3) Cleaning Compound (Federal stock No.

appendix I.

7930-395-9542).

(4) Lens cleaner (SigC stock No. 8A819).

34. Visual Inspection

33. Preventive Maintenance

a. Inspect the equipment carefully for loose or

a. DA Form 11-256 (figs. 32 and 33). DA Form

missing nuts, bolts, and screws. Replace any that are

11-256 is a preventive maintenance check list to be used

missing, and hand-tighten any that are loose. Do not use

by the operator. Items not applicable to the equipment

excessive force.

are lined out. References in the ITEM block are to items

b. With a negative carrier in place in the enlarger,

in this paragraph that contain additional maintenance

turn the ON-OFF switch to ON to see that there are no

information pertinent to the item. Follow the instructions

light leaks through the bellows or lens board.

on page 1 of the form.

c. Check the roll-film tank and the cut-film tank to

b. Items.

The information given below

be sure that there are no light leaks and that the covers

supplements DA Form 11-256. The item numbers

fit securely.

correspond to the ITEM numbers on the form.

d. Check the negative and photographic print

processing components to be sure that they are in good

condition and do not require repair and/ or replacement.

Item

Maintenance procedure

35. Equipment Performance Checklist

a. General.

This checklist is used to check

systematically the equipment performance. All corrective

Clean the projection lenses and the condenser

measures that the operator can perform are given in the

lens assemblies with a camel's-hair brush. If

corrective measures column. If the action taken by the

additional cleaning is required, use lens tissue;

operator does not correct the fault, additional

do not use water or household-type cleaning

maintenance is required by higher echelon personnel.

fluids. Clean all other components of the proc-

The operator should note on the repair tag how the

AGO 6894A