Panasonic KX-W1500

Safety Precautions
Caution
No modification of any circuit should be attempted. Service should only be performed sets you are thoroughly er
familiar with all of the following safety checks and service guide lines.
Safety Check
Care should be taken while servicing this display unit because of the high voltage used in the deflection
circuits. These voltages are exposed in such areas as the associated flyback and yoke circuits.
Fire and Shock Hazard
1. When servicing, pay attention to the original lead routing, especially in the high voltage circuit. If a short circuit
is found, replace all parts which have been overheated or damaged by the short circuit.
2. All protective devices must be reinstalled per original design.
3. Soldering must be inspected for possible cold solder joints, frayed leads, damaged insulation, solder splashes
or sharp solder points.
Be certain to remove all foreign material.
Implosion
Protection
ee
All
Panasonic
picture
tubes
are
equipped
with
an
integral
implosion
protection
system,
but
care
should
be
taken
to
avoid
damage
and
scratching
during
installation.
Use
only
a
Panasonic
replacement
picture
tube.
X-Radiation
Warning: The only potential source of X-Radiation is the picture tube.
However when the high voltage circuitry is operating properly there is no possibility of an X-Radiation
problem. The basic precaution which must be exercised is to keep the high voltage at the following fac-
tory-recommended level.
Note: It is important to use an accurate periodically calibrated high voltage meter.
1.
To
measure
the
high
voltage,
connect
a
high
voltage
meter
(electrostatic
type)
to
the
unit
(©
to
chassis
ground
and
@
to CRT
anode).
2. Turn the brightness control fully to the left (minimum brightness).
3. Measure the high voltage. The high voltage meter reading should indicate 12.7KV += O.5KV.
4.
If
the
meter
indication
is
out
of
tolerance,
immediate
service
is
required
to
prevent
the
possibility
of
premature
component
failure.
5.
To
prevent
the
possibility
of
X-Radiation,
it
is
essential
to
use
the
specified
picture
tube.
Any
attempt
to
substi-
tute
a
tube
of
a
different
manufacturer
of
color
can
result
in
a
serious
X-Radiation
hazard
and
component
fai-
lure.
Important Safety Notice
There
are
special
components
used
in
the
Panasonic
Word
Processor
unit
which
are
important
for
safety.
These
parts
are
shaded
on
the
schematic
diagram
and
marked
A\
on
the
replacement
parts
list.
It
is
essential
that
these
critical
parts
should
be
replaced
with
manufacturer's
specified
parts
only
to
prevent
X-
RADIATION,
shock,
fire
or
other
hazards.
Do
not
modify
the
original
design
without
written
permission
form
Panasonic
Company
or
this
will
void
the
original
parts
guarantee.
aM