Service Manuals, User Guides, Schematic Diagrams or docs for : LG Monitor LG_42PC3D_[SM]

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LG_42PC3D_[SM]


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                                CANADA : http//biz.lgservice.com
                                USA    : http//www.lgservice.com
                                       : http//biz.lgservice.com




PLASMA TV
SERVICE MANUAL
CHASSIS : PA-51D

MODEL : 42PC3DV/DVA 42PC3DV/DVA-UD
MODEL : 42PC3D/DC/DH 42PC3D/DC/DH-UD
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
                                            SAFETY PRECAUTIONS

                                            IMPORTANT SAFETY NOTICE
 Many electrical and mechanical parts in this chassis have special safety-related characteristics. 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                                                      Leakage Current Hot Check (See below Figure)
                                                                      Plug the AC cord directly into the AC outlet.
An lsolation Transformer should always be used during                 Do not use a line Isolation Transformer during this check.
the servicing of a receiver whose chassis is not isolated from        Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
the AC power line. Use a transformer of adequate power rating         between a known good earth ground (Water Pipe, Conduit, etc.)
as this protects the technician from accidents resulting in           and the exposed metallic parts.
personal injury from electrical shocks.                               Measure the AC voltage across the resistor using AC
                                                                      voltmeter with 1000 ohms/volt or more sensitivity.
It will also protect the receiver and it's components from being      Reverse plug the AC cord into the AC outlet and repeat AC
damaged by accidental shorts of the circuitary that may be            voltage measurements for each esposed metallic part. Any
inadvertently introduced during the service operation.                voltage measured must not exceed 0.75 volt RMS which is
                                                                      corresponds to 0.5mA.
If any fuse (or Fusible Resistor) in this monitor is blown, replace   In case any measurement is out of the limits sepcified, there is
it with the same specified type.                                      possibility of shock hazard and the set must be checked and
                                                                      repaired before it is returned to the customer.
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.          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.                                                     Good Earth Ground
Place the AC switch in the on positioin, connect one lead of                                                    such as WATER PIPE,
ohm-meter to the AC plug prongs tied together and touch other            To Instrument's                        CONDUIT etc.
ohm-meter lead in turn to each exposed metallic parts such as                                     0.15uF
                                                                         exposed
antenna terminals, phone jacks, etc.                                     METALLIC PARTS
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1M and 5.2M.
When the exposed metal has no return path to the chassis the                                  1.5 Kohm/10W
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
                                                                      CANADA: LG Electronics Canada, Inc. 550 Matheson
                                                                              Boulevard East Mississauga, Ontario L4Z 4G3

                                                                      USA      : LG Customer Interactive Center
                                                                                  P.O.Box 240007, 201 James Record Road Huntsville,
                                                                                  AL 35824
                                                                                  Digital TV Hotline 1-800-243-0000




                                                                 - 2 -
                                                       TABLE OF CONTENTS

DESCRIPTION OF CONTROLS ...........................................4


SPECIFICATIONS.................................................................8


ADJUSTMENT INSTRUCTIONS ..........................................9


BLOCK DIAGRAM...............................................................13


EXPLODED VIEW..........................................................16,18


EXPLODED VIEW PARTS LIST ....................................17,19


REPLACEMENT PARTS LIST ............................................20


SCHEMATIC DIAGRAM..........................................................


PRINTED CIRCUIT BOARDS .................................................




                                                                               - 3 -
                          DESCRIPTION OF CONTROLS

Controls

- This is a simplified representation of front panel.
- Here shown may be somewhat different from your TV.




                                                                   CH            CHANNEL (D,    E)
                                                                                 Buttons


                                                                                 VOLUME (F,G)
                                                                   VOL
                                                                                 Buttons

                                                                     ENTER
                                                                                 ENTER Button
                                                                         MENU
                                                                                 MENU Button
                                                                         INPUT
                                                                                 INPUT Button


                                                                                    (Power) Button
        Remote Control Sensor

                Power/Standby Indicator
                



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