Mstar isp utility lg download
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Such components commonly are calledĮlectrostatically Sensitive (ES) Devices. Some semiconductor (solid-state) devices can be damaged easily by static electricity. Use with this receiver only the test fixtures specified in this service manual.ĬAUTION: Do not connect the test fixture ground strap to any heat sink in this receiver.
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Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead.Īlways remove the test receiver ground lead last.Ĩ. Do not apply AC power to this instrument and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed.ħ.
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Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this service manual might be equipped.Ħ. Unless specified otherwise in this service manual, lubrication of contacts in not required.ĥ. Unless specified otherwise in this service manual, clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable non-abrasive applicator 10% (by volume) Acetone and 90% (by volume) isopropyl alcohol (90%-99% strength) Do not spray chemicals on or near this receiver or any of its assemblies.Ĥ. Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device (DVM, FETVOM, etc) equipped with a suitable high voltage probe.ĭo not test high voltage by "drawing an arc".ģ. 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.
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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.