Chapter 4. GENERAL SUPPORT MAINTENANCE INSTRUCTIONS

TM 11-6130-392-34

CHAPTER 4

GENERAL SUPPORT MAINTENANCE INSTRUCTIONS

Section I. GENERAL

(1) Battery holders

4-1. Scope

(2) Filter capacitor (C1)

This chapter contains instructions for fault isolation

(3) Transformer (T1)

testing, component replacement procedures, limited

(4) Power switch (CB1)

r e p a i r s or calibration, a n d testing of equipment

(5) Interlock switch (S6)

after component replacement or repair for general

(6) Input voltage switch (S1)

s u p p o r t (GS) maintenance of Battery Charger

(7) Resistor assembly (A14) components

PP-7286/U. Illustrations are provided, and tools,

(8) EMI filters (FL1 and FL2)

equipment, or materials are specified for battery

(9) Panel meter (M1)

charger GS maintenance. General support mainte-

(10) All other front panel components

n a n c e personnel will perform tests and replace-

(switches S2 through S5, S7 through S12, jacks, and

ments, and repair of limited components. Repair of

fine adjust controls R5 through R9)

printed wiring/board assemblies will be performed

(11) Terminal board (TB1) components

by depot level maintenance personnel only.

b. Printed wiring/board assemblies, power cable,

4-2. General Support Tests

memory battery, lamp, and fuses. Refer to Chapter

3, direct support maintenance instructions.

General support personnel will perform tests, as

c. GS personnel will also adjust panel meter (M1).

follows:

a. M a k e v o l t a g e , r e s i s t a n c e , and waveform

4-4. Repainting and Refinishing Instructions

m e a s u r e m e n t s to isolate faulty printed wiring/

Refer to Chapter 3, for authorized touchup of small

board assemblies and related battery charger com-

damaged areas.

ponents.

b. T e s t b a t t e r y c h a r g e r p e r f o r m a n c e , a f t e r

4-5. Voltage, Resistance, and Waveform

replacement or repair of faulty components.

Measurements

4-3. General Support Replacements and

F a u l t isolation procedures are specified in para-

Repairs (figure 4-1)

graph 4-12, by test number and description. Proce-

dures specify when voltage, resistance, and wave-

General support (GS) personnel are authorized to

form measurements are to be made, and test points

replace the following:

to be used. Illustrations are provided or referenced

a. Related Battery Charger PP-7286/U compo-

for identity and test point locations.

nents:

Section II. TOOLS AND EQUIPMENT

4-6. Test Equipment, Tools and Materials

b. Tools and Materials. Tools and materials re-

quired for general support maintenance, including

a. Test equipment. Test equipment required for

special tools required for fault isolation, are listed in

g e n e r a l support maintenance of Battery Charger

table 4-2.

PP-7286/U is listed in table 4-1.

Table 4-1. Test Equipment

Common

National

Name

Item

Stock No.

Technical Manual

Multimeter, digital HP 3465B, or equiv

Digital Multimeter Oscilloscope . .

6625-00-053-3112

Oscilloscope, AN/USM-281. . . . . . . . . . . . . . . .

TM 11-6625-1703-15 . . . .

Stopwatch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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6645-00-903-1696

4-1