Preparation For Testing Regulator - Piper PA-24 Comanche Service Manual

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PIPER COMANCHE SERVICE MANUAL
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FIGURE 9·27,. REGULATOR DIAGRAM
i-
Capacitor. C
1.
is used to filter ripple and alter:llltot diode switching spike when eper-
anng baneryless.
k. ~eon lamp. Ll. provides transIent voltaae orotection actiDg u a sur. suppressor.
I. Control
PI
is Wled to provide a limited ranp of voltaae adjustment.
9-
61p. P'.,o,otion Fo, T••tin,.
CAUTION
Do Sot [nterchange Regulator Leads. This 'Rill destroy reculatot
and void warranty.
a. The aircraft technician or other electrical systems specialist. must disconnect ~he banery
before connectini or disconnecting a test ammeter or other test equipment or before making
wiring chatlles in the electrical system.
b. When a voltmeter only IS to be loISed for circuit tHtina. the battery need not
be dis con-
neetea. prOVided caution is used when connecting or di.connecline the voltmeter.
c. When installing a battery in an aircraft. be
SUTe
that the battery neeative terminal is in a
position so ~hat this terminal can be connected to the battery ground cable for negative ground
syste!nS,
d.
T~e
regulator. when installed in an aircraft, should be mounted on a metal area. and in a
piace where It
'Mill
not be subjected te excessive temperature.
e. To Insure a good regulator ground. a permanent ground lead should be connected between
t!le
regulator :nqunting !)olt and the a Iternator frame.
f.
The alternator does not need to be polanzed: therefore, never connect ground. even mo-
mentanlr. te
eit~er ~~e ~eiulator
!lela terminal or to the aiternator field tet:mnals. Do not inter-
c~ange
[ and F leads to regulator as
t
hrs will destroy the relulator.
ELECTRICAL SYSTEM
iSSiJEu: 8/18/72
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