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
General support personnel will perform tests, as
c. GS personnel will also adjust panel meter (M1).
follows:
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
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 . .
Oscilloscope, AN/USM-281. . . . . . . . . . . . . . . .
TM 11-6625-1703-15 . . . .
Stopwatch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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4-1
