Theory And Circuit Analysis - GE 4PE21A1 Instructions Manual

EBI-36S?
c.
To
prevent momentary beam starving when
the Vidicon
Control Panel TARGET
AUTO/MAN switch
is set in
the AUTO position,
readjust
the camera BEAM control slightly above
the position which
just discharges
the normal picture highlights.
The increase
in
beam current will
not degrade the picture
quality when
the
Vidicon tube
is
used
in this equipment.
MA
I
NTE
PdA
A10E
GENEKAL.n
This equipment has been carefully adjusted
at the factory for
optimum performance
and will
with ordinary
care give satisfactory
operation.
It is
important that
the
unit
he kept clean and free of dust.
A
regular inspection and cleaning maintenance schedule will
greatly aid
in keeping
the enui.pment
up
to par.
Check
all
electrical connections,
cables, and cdmponents for
breaks, burning, or looseness and secure
or replace
as
necessary.
Utilize test patterns to show the results
of
various
mirad-°
justments
of
controls.
Any abnormal conditions will usually show
up
or the picture
rntnitor
tube.
In
using
a
test chart make
certain itsedges
are coincidental
to the edges of the target.
In checking for linearity, use
a
grating generator.
The bars will
then appear
on the
Viewfinder and
the Monitor.
This makes
it
possible
to
check all sweeps for best linearity.
The first step
in locating trouble
is to isolate
it to
a
particular
unit.
The voltage charts and waveforms included in
the
instruction books for
the various units
in the system
are
useful
in
point to point checking.
In addition, the book for each unit
in the Camera Channel
has
a
special section
of
THEORY AND CIRCUIT ANALYSIS and MAINTENANCE
to further
aid the operator
in the proper
use and maintenance.
of
the
equipment.
Replacement
of
Vidicon Tube
When
a
new Vidicon tube
has to be installed,
it;
is
recommended
that steps
5
through
8,
a
and
b,
be
repeated,
If it is
necessary
to reverse the vertical deflection; leads,
12