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Figure 1-9. Soft Start Overvoltage and Current Limit Circuits
Up
TM-11-6130-429-40 Converter Direct Current CV=3734/T Manual
Next
Table 2-1. Converter Operational Test
TM 11-6130-429-40
GENERAL
SUPPORT
MAINTENANCE
INSTRUCTIONS
SECTION
I.
REPAIR
PARTS,
SPECIAL
TOOLS,
TMDE,
AND
SUPPORT
EQUIPMENT
2-1. Common Tools and Equipment
e. O s c i l l o s c o p e  A N / U S M - 2 8 1 C .
f. P o w e r  S u p p l y  P P - 7 5 4 5 / U .
For authorized common tools and equipment, refer
g. P o w e r  S u p p l y  P P - 7 5 7 4 / G .
t o the Modified Table of Organization and Equip-
h. V a r i a b l e L o a d D L P 5 0 - 1 5 0 - 3 0 0 0 .
ment (MTOE) applicable to your unit.
i. M e g o h m m e t e r
ME-481/U.
j. F a n ,
Tubeaxial
MU3A1.
2-2. Special Tools, TMDE, and Support
k. Test Cable (see appx C).
Equipment
l. Jumper (see appx C).
Special tools, TMDE, and support equipment re-
quired by general support maintenance personnel are
2-3. Repair Parts
listed below:
Repair parts are listed and illustrated in the repair
a. T o o l Kit, Electronic Equipment TK-100/G.
parts  and  special  tools  list  (RPSTL),  TM
b. R e p a i r Kit, Printed Wiring Board MK-772/U.
1 1 - 6 1 3 0 - 4 2 9 - 4 0 P ,  covering  general  support  mainte-
c. D i g i t a l  V o l t m e t e r  A N / G S M - 6 4 B .
nance for this equipment.
d. M u l t i m e t e r M E - 4 5 0 / U .
SECTION
Il.
TROUBLESHOOTING
2-4. General
Troubleshooting
Information
quired
voltage
measurements.
Always
disconnect the test cable at rear panel plug
Perform the bench tests in tables 2-1 and 2-2 to
P1, or otherwise interrupt the power sup-
d e t e r m i n e whether the converter is operational and
ply to the equipment before touching any
to localize malfunctions. Improper readings obtained
of the internal parts. Ground points of
during bench testing indicate failed components and/
high potential to remove residual volt-
or faulty wiring. Perform all tests and proceed to the
ages.
d e t a i l e d troubleshooting information to isolate the
problem to a failed component.
CAUTIONS
P r o p e r grounding is essential to satisfac-
2-5. Troubleshooting Tables
t o r y operation of the converter. Damage
Table 2-3 contains detailed troubleshooting informa-
may result.
tion to isolate malfunctions discovered during bench
t e s t i n g to specific circuits and/or components. Fol-
T h i s equipment is transistorized; observe
l o w the procedures in proper sequence and perform
all cautions to prevent transistor damage.
the corrective actions to return the converter to serv-
Do not make continuity or resistance
i c e a b l e condition.
c h e c k s other than those specified in the
t e s t s . Damage to the transistors and mi-
WARNING
croelectronic devices, which can impair
W h e n troubleshooting or making repairs
the performance of the equipment, may
o n this equipment be extremely careful.
result if improper battery voltages and po-
High current as high as 22 amperes is
larities are applied.
p r e s e n t in the output power section. Use
insulated test probes when making the re-

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