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website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html PLASMA TV SERVICE MANUAL CHASSIS : PP62A MODEL : 42PC3R 42PC3R-ZH CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. CONTENTS SAFETY PRECAUTIONS ....................................................................................3 DESCRIPTION OF CONTROLS ..........................................................................4 SPECIFICATIONS .......................................
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  PLASMA TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS,READ THE SAFETY PRECAUTIONS IN THIS MANUAL. CHASSIS : PP62A MODEL : 42PC3R 42PC3R-ZH website:http://biz.LGservice.come-mail:http://www.LGEservice.com/techsup.html  CONTENTS SAFETY PRECAUTIONS....................................................................................3DESCRIPTION OF CONTROLS..........................................................................4SPECIFICATIONS..............................................................................................10ADJUSTMENT INSTRUCTIONS.......................................................................12TROUBLE SHOOTING GUIDE..........................................................................17PRINTED CIRCUIT DIAGRAM..........................................................................25BLOCK DIAGRAM.............................................................................................27EXPLODED VIEW..............................................................................................28EXPLODED VIEW PARTS LIST........................................................................29REPLACEMENT PARTS LIST...........................................................................30SCHEMATIC DIAGRAM.........................................................................................  SAFETY PRECAUTIONS Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by inthe 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 toprevent X-RADIATION, Shock, Fire, or other Hazards. Do not modify the srcinal design without permission of manufacturer. General Guidance An isolation Transformer should always be used duringthe servicing of a receiver whose chassis is not isolated fromthe AC power line. Use a transformer of adequate power ratingas this protects the technician from accidents resulting inpersonal injury from electrical shocks.It will also protect the receiver and it's components from beingdamaged by accidental shorts of the circuitry that may beinadvertently introduced during the service operation.If any fuse (or Fusible Resistor) in this monitor is blown, replaceit with the specified.When replacing a high wattage resistor (Oxide Metal FilmResistor, 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 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 ofohm-meter to the AC plug prongs tied together and touch otherohm-meter lead in turn to each exposed metallic parts such asantenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, themeasured resistance should be between 1MΩ and 5.2MΩ. When the exposed metal has no return path to the chassis thereading must be infinite.An other abnormality exists that must be corrected before thereceiver is returned to the customer. 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 capacitorbetween a known good earth ground (Water Pipe, Conduit, etc.)and the exposed metallic parts.Measure the AC voltage across the resistor using ACvoltmeter with 1000 ohms/volt or more sensitivity.Reverse plug the AC cord into the AC outlet and repeat ACvoltage measurements for each exposed metallic part. Anyvoltage measured must not exceed 0.75 volt RMS which iscorresponds to 0.5mA.In case any measurement is out of the limits specified, there ispossibility of shock hazard and the set must be checked andrepaired before it is returned to the customer. Leakage Current Hot Check circuit 1.5 Kohm/10W To Instrument'sexposed METALLIC PARTSGood Earth Groundsuch as WATER PIPE,CONDUIT etc. AC Volt-meter IMPORTANT SAFETY NOTICE 0.15uF  OK INPUTTVTV INPUT PIP PR-PIP PR+SWAP PIP INPUT DVDARC EXIT VOLTIME  REVEAL INDEX Q.VIEWMUTE PR SLEEP LIST I/IIMENUTEXTPIPSIZE  POSTION VCRPOWER 123456789 * 10  FAV ? POWERTV INPUTINPUTARCBrightnessadjustmentColoured buttonsPIPSIZEPOSITIONPIPPR - /+SWAPPIPINPUT VCR/DVD control buttonsEXITLISTMENUI/IISLEEP Switches the set on from standby or off to standby.Returns from AV1 , AV2 , S-Video2 , AV3 , AV4 (except42PC3RV*), Component , RGB , HDMI1/DVI or HDMI 2 to the TV mode. Switches the set on fromstandby. If you press the button once, the input source OSD willappear on screen as shown. Press the D / E buttonand then OK button to select the desired input source( TV , AV1 , AV2 , S-Video2 , AV3 , AV4 (except 42PC3R*), Component , RGB , HDMI1/DVI or HDMI 2 ).Selects your desired picture format. Adjusts screen brightness.It returns to the default settings brightness bychanging mode source. These buttons are used for teletext (only TELETEXT models) or Programme edit .Switches the sub picture PIP, DW, POPor off mode.Adjusts the sub picture size.Moves the sub picture.Selects a programme for the sub picture.Exchanges the main/sub images in PIP/Twin picturemode.Selects the input source for the sub picture inPIP/Twin picture mode.Controls some video cassette recorders or DVDplayers when you have already selected DVD orVCR mode button. Clears all on-screen displays and returns to TVviewing from any menu.Displays the programme table.Selects a menu.Selects the sound output.Sets the sleep timer.                            DESCRIPTION OF CONTROLS
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