Manual plasmatv modelo 42px4rv/rva 42px4rv/rva.za

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PLASMA TV SERVICE MANUAL
CHASSIS : MF-056A

MODEL : 42PX4RV/RVA
42PX4RV/RVA-ZA
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

TV/AV

MENU

OK

VOL

PR

CONTENTS

SAFETY PRECAUTIONS....................................................................................3 DESCRIPTION OF CONTROLS ..........................................................................4 SPECIFICATIONS ................................................................................................9 ADJUSTMENT INSTRUCTIONS .......................................................................11 TROUBLE SHOOTING GUIDE..........................................................................15 BLOCK DIAGRAM .............................................................................................24 EXPLODED VIEW ..............................................................................................26 EXPLODED VIEW PARTS LIST ........................................................................27 REPLACEMENT PARTSLIST...........................................................................28 SCHEMATIC DIAGRAM......................................................................................... PRINTED CIRCUIT BOARD ..................................................................................

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SAFETY PRECAUTIONS
IMPORT ANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-relatedcharacteristics. These parts are identified by in the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

General Guidance
An isolation Transformer should always beused during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks. 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 theservice operation. If any fuse (or Fusible Resistor) in this monitor is blown, replace it with the specified. When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1W), keep the resistor 10mm away from PCB. Keep wires away from high voltage or high temperature parts. Due to high vacuum and large surface area of picture tube, extreme care should be used in handling the Picture Tube.Do not lift the Picture tube by it's Neck.

Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet. Do not use a line Isolation Transformer during this check. Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistorusing AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to 0.5mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it isreturned to the customer.

Leakage Current Hot Check circuit

AC Volt-meter

Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an electrical jumper across the two AC plug prongs. Place the AC switch in the on position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each...
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