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Leads do not have to be unsoldered in order to
tt$t Tranmtors. Refer to the appropriate draw
ing. for the solder points on the underside of the
modute.
Locate the emitter
t
base. and collector
leads.
Set
an ohmmeter to the RXI K scale and
pia"" the p<>sitlve
(+)
probe on the collector
(0
and the neptive (-) probe
on
the
emitter
(E).
Place a
nat~bJade
screwdriver tip. across the posi
tion probe and the
transi.tor
base (BUFig. 4-2).
The tnmsistor
should
switch
ON.
causing meter
needle movement.
If
no needle
motion~
repJace
the transistor.
4. Testing Integrated CimIits (I.C)
A method.
similar to the transistor test described
above. is used to test Integrated Orcuits. on a
G()'NO
GO
basis
only. ThIs system
wiH
detennine
that the LC. is operating. See
Fig.
4-3 and proceed
as
follows: connect the power fmm
a
3 volt bat
tery
~
or other direct current 3V (D.C.)
source.
to
the solder connections
,(Fig. 3-13)
on the under
side
of
the module.
Observe
the proper polarity,
the positive lead from the battery must be
COrr
nected to pin
3
and the negative must be connect
ed to pin
4
of the
Le.
To simulate an operational
signal use an ohmmeter. set the scale to
RXI K
and use the ohmmeter leads as illustrated: the
positive lead. using a pin type probe. placed on
the Input. pin
2
and the negative lead. placed On
the Output. pin I. Observe thai the ohmmeter
needle
deflects
and continues to move slowly.
J(
the needle does not deflect. the
I.e.
is inoperative
and mu.'IIt be replaced. If the needle deflects Cull
scale aod remains at zero, the
I.e.
is shorted and
must be replaced,
EMITTER
. .
,
B.
INTERCHANGING
MODULES
Since all of the
Electronic
Modules
used
in the
Camera systems are an outgrowth of the original
362 Shutter Module, Type 1, it follows that
sli~t
changes. s\lbstitutions or deletions may alter
one configuration to another. Data on substitu
tion possibilities will
be
provided in the fonn of
a Table
(Fig.
4-4). Study of the Table
wiH
reveal
exactly how to change one Module into another.
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