Connecting a test substitute in parallel with an electrolytic capacitor in the receiver.ĬAUTION: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard.Ģ. Disconnecting or reconnecting any receiver electrical plug or other electrical connection.Ĭ. Removing or reinstalling any component, circuit board module or any other receiver assembly.ī. Always unplug the receiver AC power cord from the AC power source before Ī. NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. Leakage Current Cold Check(Antenna Cold Check)ĬAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication. Keep wires away from high voltage or high temperature parts.īefore returning the receiver to the customer,Īlways perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc., to be sure the set is safe to operate without damage of electrical shock. When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1W), keep the resistor 10mm away from PCB. If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with the specified. It will also protect the receiver and it's components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks. An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line.
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