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P04 408T:.
IMPORTANT
SERVICE
NOTES
Maintenance and repair of this receiver should be done by
qualified service personnel only.
SERVICING
OF
HIGH
PICTURE TUBE
When
servicing the high voltage system, remove
static
charge from it by connecting a 10k ohm Resistor in series
with an insulated wire (such as a test probe) between
picture tube dag and 2nd anode lead. (AC line cord should
be disconnected from AC outlet.)
1. Picture tube in this receiver employs integral implosion
protection.
2. Replace with tube of the same type number for continu-
ed safety.
3. Do not lift picture tube by the neck.
4. Handle the picture tube only when wearing shatter-proof
goggles and after discharging the high voltage com-
pletely.
VOLTAGE
SYSTEM
AND
X-RAY
This receiver is designed so that any X-ray radiation is kept
to an absolute minimum. Since certain malfunctions or
servicing
may
produce
potentially
hazardous
radiation
with prolonged exposure at close range, the following pre-
cautions should be observed:
1. When repairing the circuit, be sure not to increase the
high voltage to more than 25.0kV, (at beam 800yA) for
the set.
2. To keep the set in a normal operation, be sure to make
it function on 20.5KV + 1.5kV (at beam 800A) in the
case of the set. The set has been factory - adjusted to
the above-mentioned high voltage.
If there is a possibility that the high voltage fluctuates
as a result of the repairs, never forget to check for
such high voltage after the work.
3. Do
not substitute
a picture tube with unauthorized
types
and/or
brands
which
may
cause
excess
X-ray
radiation.
BEFORE
RETURNING
THE RECEIVER
Before returning the receiver to the user, perform the
following safety checks.
1. Inspect all lead dress to make certain that leads are not
pinched
or that hardware is not lodged between
the
chassis and other meta! parts in the receiver.
2. Inspect all protective devices such as non-metallic con-
trol knobs, insulating fishpapers, cabinet backs, adjust-
ment
and
compartment
covers
or
shields,
isolation
resistor-capacity
networks,
mechanical
insulators
etc.
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