Voltage Regulator A1 Replacement.

TM 32-5865-218-24&P

Unsolder and remove component.

Clean pads.

(5)

Use the orangewood stick to remove any burned conformal

(6)

coating residue from the area. Use care to avoid damage

to traces or pads.

Clean the area around the top and bottom component lead

(7)

pads with cotton swabs (item 16, App. D) and the cleaning

solution (item 14, App. D).

Insert the new component in the CCA and trim leads to the

(8)

proper length.

Solder the new component in place.

(9)

(10) After soldering all leads, clean the connections with the

stiff brush (item 3, App. D) and cleaning solution (item

14, App. D).

(11) Retest the CCA to verify successful repair and proper

operation.

(12) Determine the type of conformal coating used on the

Test a small area away from components with

repaired CCA.

If the freon

freon TFE, TE, or TMS (item 14, App. D).

strips away from the coating, the coating is humiseal 1B31

(item 9, App. D); if it does not strip away, the coating

is humiseal 1A33 (item 9, App. D).

NOTE

Patch the

Humiseal 1A33 and 1B31 are not compatible.

conformal coating only with the type already present.

(13) Patch the conformal coating with the appropriate type of

humiseal in the test and repair areas.

(14) Refer to section V of this chapter.

Refer to figure 5-13 and

i. Voltage Regulator A1 Replacement.

proceed as follows:

(1)

Remove the four screws (17) and flat washers (18) that

secure the heat sink and voltage regulator (16) to the

chassis, then remove the heat sink and voltage regulator.

(2)

Disconnect connector A1P1 (67) from voltage regulator

(16) by unscrewing screws in screw lock assemblies (68).

Attach connector A1P1 (67) to voltage regulator A1 (16).

(3)

(4)

Aline voltage regulator A1 (16) with the mounting holes

and secure with the four screws (17) and flat washers

(18) .

5-42