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Quarter-Start Generator.
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TM-11-6130-377-14 Inverter Power Static PP-7078/U Manual
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Operating Inverter with Front Panel Open
TM 11-6130-377-14
CHAPTER 6
GENERAL SUPPORT MAINTENANCE
Section I. GENERAL REQUIREMENTS
required to troubleshoot, test, repair, and adjust the
6-1. Scope of General Support Maintenance
inverter at the general support maintenance level.
a. This  chapter  contains  instructions  covering
general support maintenance of the inverter. It includes
Item
National Stock No.
component location diagrams of the inverter and of the
Voltmeter, Digital AN/GSM-64
inverter drive subassembly A1A2.  Section I of this
Multimeter TS-352B/U
chapter identifies the test equipment and tools required to
Oscilloscope AN/USM-281A
perform general support maintenance.
Counter, Electronic AN/USM-207
Distortion Analyzer TS-723/U
b. Section II contains general support trouble-
Variable DC Power Source, Deltec Part
shooting procedures. The procedures are a continuation
No. 2592, or equal (dc power source
of  those  covered  at  operator  level  to  a  higher
115  volts,  70  amperes,  plus  a
maintenance level.
variable control, 100 to 150 volts dc)
c.  Section  III  contains  repair
procedures
for
Load Bank. Deltec Part No. 2591 or
equal, (dummy load resistors 5000
replacing defective component parts.
watts)
d. Section  IV  contains  the  calibration  and
Tool Kit, Electronic Repairman TK-
adjustment procedures required to maintain the inverter at
100/U
the general support maintenance level and to determine
Tool Kit, Electronic Repairman TK-
that the repaired equipment is performing satisfactorily for
105/U
return to users.
Torque Wrench, range 200 to 400
inches pounds
6-2. Tools and Test Equipment Required for
Silicone dielectric compound (GE 641
Maintenance
or equal)
500 volt ac RMS high-pot generator
The following chart lists the test equipment and tools
Section II. TROUBLESHOOTING
shooting procedures for the inverter are contained in
WARNING
troubleshooting chart (para. 6-5b).
To avoid injury and possible death of
6-4. Organization of Troubleshooting Procedures
personnel, use extreme caution with
all
components
marked
"HIGH
a. General. The first step is servicing a defective
VOLTAGE." Ensure that all capacitors
inverter is to sectionalize the fault to the major unit
are discharged after power is removed
responsible for abnormal operation. The second step is to
and do NOT attach test equipment
localize the fault to a group of components or circuits
with the inverter operating.
within the faulty unit. After the fault has been localized, it
must be isolated to a single component, wire, or piece
6-3. General
part that is defective.
Troubleshooting procedures described in this section
b. Sectionalization. Use the checks listed in (1)
provide maintenance personnel with a systematic method
of isolating troubles within the inverter.  The trouble-
Change 1
6-1

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