Section IV. MAINTENANCE OF THE PSTS

ARMY TM 5-6675-309-14

MARINE CORPS TM 08840A-14/1

Connect connector P1 (5) to electronic

8-9. General. Maintenance of PSTS allocated to general

component assembly no. 1 A1 (7) b en-

support by MAC consists of PSTS testing, repair, adjust-

gaging and turning two jackscrews (6).

ments, and cable testing and repair.

When electronic component assembly no.

NOTE

1 A1 (7) is replaced, it must be adjusted in

Where similar components are removed

accordance with paragraph 8-9e.

and replaced by identical procedures, one

Place PSTS front panel (51, figure 8-6,

typical procedure will be given. If appli-

sheet 1) in PSTS instrument case (1), align

cable, replace heat shrinkable tubing and

mounting holes.

shrink in place.

Install 20 screws (49) and washers (50)

a. PSTS Testing. Testing is performed as described

securing PSTS front panel (51) to PSTS

in paragraph 8-10.

instrument case (1).

b. Cable Testing. Testing is performed as described

(2) Current limiter component assembly A3. Re-

in paragraph 8-3.

move and replace current limiter component

c. Cable Repair. Cable and connector repair con-

assembly A3 (123, figure 8-6, sheet 3) as fol-

sists of replacing contact pins and repairing wires in

lows:

accordance with paragraph 8-12.

(a) Removal.

d. PSTS Repair. Maintenance of PSTS is divided

1. Remove 20 screws (49, figure 8-6, sheet 1)

into two categories, repair and replacement. Electronic

and washers (50) securing the PSTS front

component assembly no. 1 A1, current limiter assembly

panel (51) to the PSTS instrument case

A3, and chassis-mounted components are replaced.

(1). Remove PSTS front panel far enough

Electronic component assembly no. 2 A2 and electrical

to provide access to current limiter com-

connectors are repaired. Figure 8-6 is an exploded view.

ponent assembly A3 (123, figure 8-6, sheet

Non-critical components on A1 are replaced.

3).

(1) Electronic component assembly no. 1 A1. Re-

2. Tag and unsolder wires from current lim-

move and replace electronic component as-

iter component assembly A3 (123).

sembly no. 1 A1 (7, figure 8-6, sheet 2) as

follows:

3. Remove four screws (125) and washers

(124) securing current limiter component

(a) Removal.

assembly A3 123) to relay bracket no. 3

1. Remove 20 screws (49, figure 8-6, sheet

(109).

1), and washers (50) securing the power

(b) Replacement.

supply test set (PSTS) front panel (51) to

the PSTS instrument case (1). Remove

Place current limiter component assembly

PSTS front panel (51) far enough to pro-

A3 (123) on relay bracket no. 3 (109);

vide access to electronic component as-

align mounting holes.

sembly no. 1 A1 (7, figure 8-6, sheet 2).

Install four screws (125) and washers

2. Disconnect connector P1 (5) from elec-

(124) securing current limiter component

tronic component assembly no. 1 A1 (7)

assembly A3 (123) to relay bracket no. 3

by turning two jackscrews (6).

(109).

3. Remove 10 screws (2), washers (4), and

Solder wires to current limiter component

lockwashers (3) securing electronic com-

assembly A3 (123).

ponent assembly A1 (7) to spacers (8).

Place PSTS front panel (51, figure 8-6,

Remove electronic component assembly

sheet 1) in PSTS instrument case (1); align

A1.

mounting holes.

(b) Replacement.

Install 20 screws (49) and washers (50)

1. Place electronic component assembly A1

securing PSTS front panel (51) to PSTS

instrument case (1).

(7) on spacers (8); align mounting holes.

2. Install 10 screws (2), washers (4), and

(3) Switch-Indicators S1, S17, and S18. Remove

lockwashers (3) securing electronic com-

and replace typical switch-indicator S1 (44,

ponent assembly A1 (7) to spacers (8).

figure 8-6, sheet 1) as follows:

8-106