SAFETY PRECAUTIONS
SAFETY-RELATED COMPONENT WARNING!X-RADIATION
There are special components used in this color monitorThe only potential source of X-radiation is the picture tube.
which are important for safety. These parts are markedHowever, when the high voltage circuitry is operating
on the schematic diagram and the replacementproperly there is no possibility of an X-radiation problem.
parts list.It is essential that these critical parts should beThe basic precaution which must be exercised is keep the
replaced with the manufacturer's specified parts tohigh voltage at the factory recommended level; the normal
prevent X-radiation, shock, fire, or other hazards. Do nothigh voltage is about 24.5kV. The following steps describe
modify the original design without obtaining writtenhow to measure the high voltage and how to prevent X-
permission from manufacturer or you will void the originalradiation.
parts and labor guarantee.
Note :It is important to use an accurate high voltage
CAUTION: No modification of any circuit should bemeter calibrated periodically.
attempted.
Service work should be performed only afterY To measure the high voltage, use a high impedance
you are thoroughly familiar with all of thehigh voltage meter, connect (�) to chassis and (+) to
following safety checks and servicingthe CDT anode cap.
guidelines.Y Set the brightness control to maximum point at full
white pattern.
SAFETY CHECKY Measure the high voltage. The high voltage meter
Care should be taken while servicing this color monitorshould be indicated at the factory recommended level.
because of the high voltage used in the deflection circuits.Y If the meter indication exceeds the maximum level,
These voltages are exposed in such areas as theimmediate service is required to prevent the possibility
associated flyback and yoke circuits.of premature component failure.
Y To prevent X-radiation possibility, it is essential to use
FIRE & SHOCK HAZARDthe specified picture tube.
An isolation transformer must be inserted between the
color monitor and AC power line before servicing the
chassis.
Y In servicing, attention must be paid to the original lead
dress specially in the high voltage circuit. If a shortCAUTION:
circuit is found, replace all parts which have beenPlease use only a plastic screwdriver to protect yourself
overheated as a result of the short circuit.from shock hazard during service operation.
Y All the protective devices must be reinstalled per the
original design.
Y Soldering must be inspected for the cold solder joints,
frayed leads, damaged insulation, solder splashes, or
the sharp points. Be sure to remove all foreign
materials.
IMPLOSION PROTECTION
All used display tubes are equipped with an integral
implosion protection system, but care should be taken to
avoid damage and scratching during installation. Use only
same type display tubes.
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ACEC
