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DOs AND DON'Ts For Circuit Repair.
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TB-9-2920-225-34-1 100 AMP Regulator (Solid State) Manual
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Figure 2-1. NPN transistor (Vap-Air).
TB 9-2920-225-34-1
CHAPTER 2
VAP-AIR MODELS
Section I. INTRODUCTION
there is no equivalent NSN number. An assembly
2-1. Introduction. Four models were produced by
is available from Bendix.
Vap-Air, a division of Vapor Corporation.
CODE IDENT 77820 (FSCM)
Code Ident 80234 (FSCM)
Bendix Corp.
Vapor Corp.
The Electrical Components
6420 W. Howard St.
Div.
Chicago, IL 60648
Sherman Ave.
In 1978, the voltage regulator product line was
Sidney, NY 13838
sold to DC Electronics Corporation.
Code Ident 34904 (FSCM)
It should be ordered as part number 6042228-
DC Electronics Inc.
10S; it will arrive as a complete assembly with
544 N. Highland Ave.
the shell marked 8701337.
Aurora, IL 60506
b. Regulator Box Assemblly (internal). If water
TELEPHONE AC 312844-5170
leakage or corrosion is detected, it is possible that
DC Electronics now provides parts and engineer-
extensive damage has been done and the regulator
ing support for all Vap-Air models. The Vap-Air
cannot be easily repaired. Components should be
part numbers for each model are:
performance tested and retained if acceptable.
26440001-01
Check for disconnected or burnt wires, missing
2644000103
components,  and replace repair as necessary.
26440001-04
Carefully remove the transistor mounting plate,
26440001-05
noting the position of the screws, washers and
rubber insulators. Visually inspect the circuit
2-2. General Inspection. This chapter applies to
board for burnt components. Replace the circuit
all Vap-Air models.
board through cannibalization if burnt compo-
a. Regulator Box Assembly (external). Check
nents are found. Carefully reinstall the transistor
for missing or stripped cover, connector mount,
mounting plate.
retainer screws, and voltage adjustment access
c. Regulator Verification Check. After perform-
plug.
ing the above inspection, if the regulator appears
Check connectors for signs of arcing, bent, or
to be in good condition, check its performance on
pushed in pins, broken connectors, and thread
a test stand. If the regulator fails this check, pro-
damage. Correct deficiencies by utilization of serv-
ceed to the following component tests.
iceable components from unrepairables or requisi-
2-3. Bench Testing. Figures 21 and 22 show the
tioning components from the manufacturer.
method for testing NPN transistors; these figures
(1) The pin receptacle (J2) is P/N 7064706
apply to all models in this chapter. If the original
FSCM 19207 or MS3102A28-22P FSCM 96906
transistors are replaced with substitute part num-
per MIL-C-5015.
bers, the repaired regulators should be carefully
(2) The socket receptacle (Jl) is P/N 7064-
tested to ensure proper operation.
706 FSCM 19207, an Army number for which
2-1

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