Ademco Troubleshooting CCTV Systems

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TROUBLESHOOTING
CCTV SYgEMS
In troubleshooting
a malfunctioning
CCTV system,
it is easiest
to have a spare
This
allows
for simple
substitution
and a quick
determincamera
or monitor.
ation
of the malfunctioning’unit.
Most companies
in the field
keep a demonstrator
system
which
also
doubles
as a spare
for troubleshooting
purposes.
If you
on the
of the
do not have a spare
monitor,
the following
problem:
camera
or
checklist
monitor,
should
and you do not receive
be used to determine
Check that
AC power
is be i ng received
I.
See that
pilot
lights
are on or that
the
the monitor
shows
evidence
of power.
If
no power
a)
b)
c)
d)
the
the
the
the
is
If
a)
b)
c)
by one
present,
between
of
the
camera
and monitor.
the picture
tube
in
units
check
that:
on position
burned
out
but no picture
is received,
camera
and monitor.
check
to
see
that
good
See that
connection
to units
is properly
made and that
connectors
are fully
inserted
in socket
and screwed
on tightly.
Check continuity
of coaxial
cable
with
an ohm meter.
Also check
for shorts.
The braided
shielding
and the outs’ide
of the coaxial
The center
conductor
carries
the
connector
form a ground
circuit.
video
signa I.
b)
3.
received
unit
is plugged
in
on-off
switch
is in the
AC receptacle
has power
fuse
in the unit
is not
2.
If power
is
connection
exists
a)
being
by the
rear
of
a picture
the source
a good
connection
is
present,
check
the
monitor.
Rotate
the brightness
knob of the monitor
to see that
a raster
(i I luminated
screen)
appears.
Rotate
horizontal
and vertical
controls
to check
for
improper
setting.
If screen
illuminates
and monitor
is properly
set,
trouble
is
probably
in camera.
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