Service Manuals, User Guides, Schematic Diagrams or docs for : LG Monitor LG_RU-42PX10_RU-42PX11_[SM]

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LG_RU-42PX10_RU-42PX11_[SM]


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




PLASMA TV
SERVICE MANUAL
CHASSIS : RF-043A

MODEL : RU-42PX10/C RU-42PX11/H
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 specified.                                                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

Due to high vacuum and large surface area of picture tube,
                                                                                            AC Volt-meter
extreme care should be used in handling the Picture Tube.
Do not lift the Picture tube by it's Neck.


                                                                                                                Good Earth Ground
                                                                                                                such as WATER PIPE,
Leakage Current Cold Check(Antenna Cold Check)                           To Instrument's                        CONDUIT etc.
With the instrument AC plug removed from AC source,                                               0.15uF
                                                                         exposed
connect an electrical jumper across the two AC plug prongs.              METALLIC PARTS
Place the AC switch in the on positioin, connect one lead of
ohm-meter to the AC plug prongs tied together and touch other
ohm-meter lead in turn to each exposed metallic parts such as                                 1.5 Kohm/10W
antenna terminals, phone jacks, etc.
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          CANADA: LG Electronics Canada, Inc. 550 Matheson
reading must be infinite.                                                     Boulevard East Mississauga, Ontario L4Z 4G3
An other abnormality exists that must be corrected before the
receiver is returned to the customer.                                 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.................................................................7


ADJUSTMENT INSTRUCTIONS ..........................................8


TROUBLE SHOOTING GUIDE ...........................................12


BLOCK DIAGRAM...............................................................23


EXPLODED VIEW...............................................................26


EXPLODED VIEW PARTS LIST .........................................27


REPLACEMENT PARTS LIST ............................................28


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


PRINTED CIRCUIT BOARD ...................................................




                                                                               - 3 -
                               DESCRIPTION OF CONTROLS


Controls
- This is a simplified representation of front panel.
  Here shown may be somewhat different from your TV.
- This manual explains the features available on the RU-42PX10 TVs.




                                          Front Panel Controls




                           ON/OFF


                                                         TV/VIDEO      MENU         VOL        CH



                     ON/OFF Button
                                                                      MENU Button         CHANNEL (E,   D)   Buttons

                            Remote Control Sensor          TV/VIDEO Button      VOLUME (F,G) Buttons


                                             Power Standby Indicator
                                             Illuminates red in standby mode,
                                             Illuminates green when the TV is
                                             turned on.




                                                          - 4 -
                                               DESCRIPTION OF CONTROLS

Connection Options




                                                                                                                           S-VIDEO Input
                                                                                                                           A connection available to provide better
                                                                                                                           picture quality than the video input.




                                                                                           S-VIDEO
                                                                                                                           VIDEO Input




                                                                                           VIDEO




                                                                                                              A/V INPUT2
                                                                                                                           Connects the video signal from a video
                                                                                                                           device.

                                                                                           L / MONO
                                                                                           R AUDIO
                                                                                                                           AUDIO Input
                                                                                                                           Use to connect to hear stereo sound
                                                                                                                           from an external device.




                                                                                                      Monitor Output
                                                                                                      Connect a second TV or Monitor.
                                              DVD/DTV Input (Component 1-2)
                                              Connect a component video/audio
                                                         device to these jacks.                                                        S-Video Input
 Remote Control Port                                                                                                                   Connect S-Video out from an S-VIDEO
 Connect your wired                                                                                                                    device to the S-VIDEO input.
 remote control here.




                                                                      COMPONENT                                                                   MONITOR
                                                                        INPUT 2                                                                   OUTPUT
                                                                      COMPONENT                                                                     A/V
                                                                        INPUT 1                                                                   INPUT 1             Antenna   AC INPUT
                                                                                                                                                            S-VIDEO
  REMOTE    RS-232C INPUT       DVI INPUT   AUDIO INPUT   RGB INPUT
                                                                                                      R         L          R     L/MONO
  CONTROL   (CONTROL/SERVICE)
                                                                                   VIDEO                  AUDIO                AUDIO      VIDEO




                                                                                                                                                       Antenna Input
                                                                           Audio/Video Input 1                                                         Connect cable or antenna
                                                     Connect audio/video output from an external                                                       signals to the TV, either
                                                                          device to these jacks.                                                       directly or through your
                          RGB Input/Audio Input/DVI Input                                                                                              cable box.
                          Connect the monitor output connector from
                          a PC to the appropriate input port.
                                                                                                                              Power Cord Socket
 RS-232C INPUT (CONTROL/SERVICE) PORT                                                      This TV operates on AC power. The voltage is indicated
 Connect to the RS-232C port on a PC.                                                         on the Specifications page. Never attempt to operate
                                                                                                                             the TV on DC power.




                                                                                  - 5 -
                                     DESCRIPTION OF CONTROLS

 Remote Control Key Functions
 - When using the remote control, aim it at the remote control sensor on the TV.




                                    MUTE
                                                       MUTE              POWER       POWER
               Switches the sound on or off.
                                                                                     Turns your TV on or off.
                                 TVVIDEO             TV/VIDEO MULTIMEDIA MTS
        Selects: TV, Video 1-2, Component
         1-2, RGB, and DVI input sources.                                            MTS
                                                     CAPTION ARC          MENU       Selects the MTS sound: Mono, Stereo, or
                           MULTIMEDIA                                                SAP.
        Selects: Component 1-2, RGB, and
                       DVI input sources.                                            MENU
                                                                                     Brings up the main menu to the screen.
                                                                  CH
                               CAPTION
                  Selects CAPTION mode.                         ENTER                ARC
                                                         VOL              VOL        Changes the picture format.
                      VOLUME UP/DOWN                              CH
     Increases/decreases the sound level.
                    CHANNEL UP/DOWN
     Selects available channels found with                                           NUMBER buttons
                                                         1         2          3
                            Auto program.
                                   ENTER
     Accepts your selection or displays the              4         5          6
                                                                                     REVIEW
                             current mode.
                                                                                     Tunes to the last channel viewed.
                                                         7         8          9
                                       FCR              FCR              REVIEW
      Use to scroll the favorite channel list.                                       DASP
                                                                   0
                                                                                     Selects the sound appropriate for the pro-
                                        APC             APC PIP/DW            DASP   gram's character.
Adjusts the factory preset picture according
                                to the room.         SPLIT ZOOM PIP CH + SLEEP       SLEEP
                                                                                     Sets the sleep timer.
                                 PIP/DW               WIN.SIZE PIP CH - PIP INPUT
           Switches between PIP and Twin
                                                                                     PIPCH-/PIPCH+
                          picture modes.             POSITION SWAP A.PROG            Changes to next lower/higher PIP channel.

                             SPLIT ZOOM                        MEMORY/ERASE          PIP INPUT
   Enlarges the picture with regular ration.                                         Selects the input source for the sub picture.

                                                                                     A.PROG (AUTO PROGRAM)
                                WIN. SIZE                                            Searches for available channels.
               Adjusts the sub picture size.

                                POSITION                                             MEMORY/ERASE
        Moves the sub picture in pip mode.                                           Memorizes or erases selected channel.

                                  SWAP
          Exchanges the main/sub images.




                                                                    - 6 -
                                    SPECIFICATIONS


        MODELS                      RU-42PX10/20                                    RU-50PX10/20

   Width (inches / mm)                48.4 / 1210                                      56 / 1400

   Height (inches / mm)                27.6 / 701                                     30.4 / 761.5

   Depth (inches / mm)                 11.4 / 290                                      11.4 / 290

   Weight (pounds / kg)                66 / 22.9                                       66 / 29.9

        Resolution                   852 x 480 (Dot)                                1366 x 768 (Dot)

    Power requirement                                       AC100-240V, 50/60Hz

    Television System                                              NTSC

    Program Coverage                               VHF 2 ~ 13, UHF 14 ~ 69, CATV 1 ~ 125

External Antenna Impedance                                          75 

          Color                                16,770,000 (256 steps of each R, G and B)

Operating Temperature Range                                 32 ~ 104



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