Service Manuals, User Guides, Schematic Diagrams or docs for : LG Monitor LG_50PX5D_AF-05FB_[SM]

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LG_50PX5D_AF-05FB_[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 : AF-05FB

MODEL : 50PX5D 50PX5D-UB
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


PRINTED CIRCUIT BOARDS .............................................18


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


EXPLODED VIEW...............................................................24


EXPLODED VIEW PARTS LIST .........................................25


REPLACEMENT PARTS LIST ............................................26


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




                                                                               - 3 -
                                 DESCRIPTION OF CONTROLS


          Controls

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



                                         Front Panel Controls
     50PX5D




                                                                                            TV GUIDE




     50PX4D




                                                                                                                                        INDEX
                                                                                                                                        Switches
                                                                                                                                        LED
                                                                                                                                        Display on
                                                                                 TV GUIDE
                                                                                                                                        or off.




                                                          TV GUIDE




                                                                                                                      Power Standby Indicator
                                                                                                                      Illuminates orange in
                                                                          CHANNEL (E,                  D)   Buttons   standby mode.
                                                                                                                      When the TV is turned on,
                                                                      VOLUME (F,G) Buttons                            the indicator will blink
                                 Remote Control                   MENU Button                                         green for 3-4 seconds
                                 Sensor                        TV/VIDEO Button                                        before the picture is seen.

                                                      TV GUIDE Button

                                               POWER Button




                                                                     - 4 -
                                      DESCRIPTION OF CONTROLS

          Connection Options

                                                  Back Connection Panel


                                                                                                                                                         S-VIDEO Input
                                                                                                                                   FRONT
                                                                                                                                 A/V INPUT
                                                                                                                                                         A connection is available to provide
                                                                                                                                       S-VIDEO           better picture quality than the video
                                                                                                                                                         input.
                                                                                                                                                             VIDEO Input




                                                                                                                            VIDEO
                                                                                                                                                             Connects the video signal from a
                                                                                                                                                             video device.




                                                                                                                            L / MONO
                                                                                                                                                             AUDIO Input




                                                                                                                            R AUDIO
                                                                                                                                                             Connections are available for listening
                                                                                                                                                             stereo sound from an external device.

Memory Card Slots



                              RGB/AUDIO INPUT
        IEEE1394              Connect the monitor output
        Connect a DVHS, a                                                                                                                                                               Remote Control Port
                              from a PC to the appropriate                                                                                                                              Connect your wired
        MicroMV Camcorder, or input port.
        a set-top box to                                                                                                                                                                remote control here.
        IEEE1394 Connector.
                                                                                                           DVD/DTV Input
                                                                                                                                                             S-Video Input
                               RS-232C INPUT (CON-                                                         (Component 1-2)
                                                                                                                                                             Connect S-
    G-LINKTM                  TROL/SERVICE) PORT                                                        Connect a component                                                                                  Antenna Input
                                                                                                                                                             Video out from
    Connect an IR             Connect to the RS-232C                                                    video/audio device to                                                                                Connect over-the-
                                                                                                                                                             an S-VIDEO
    controller to this        port on a PC.                                                                  these jacks.                                                                                    air signals to this
                                                                                                                                                             device to the S-
    jack.                                                                                                                                                    VIDEO input.                                    jack.


                                                               RS-232C INPUT
                                                           (CONTROL/SERVICE)


                                                                                                                            VIDEO                AUDIO        VIDEO     AUDIO
                                                   OUTPUT
                                                                                                                                                 L       R             L            R
                                       HDMI 2                                                                                    COMPONENT INPUT 2               MONITOR OUTPUT
                                                  COMPONENT2      DIGITAL AUDIO (OPTICAL)
                          IEEE-1394               INPUT                                                             DVD
                                                                                                                                                                                                   REMOTE    CABLE   ANTENNA
                                                                                                                    /DTV
                                                                                                                    INPUT                                                                          CONTROL                     AC INPUT
                                                                                                          AUDIO
                                      HDMI1/DVI                                             RGB INPUT
        Cable                                                                                             INPUT                                                            (MONO)
                                                    DVI                                                                         COMPONENT INPUT 1                     A/V INPUT          S-VIDEO
                                                   INPUT




    CableCARDTM                      Digital Audio (DVI: Digital                                                                                                 Monitor Output
    Used for                         Visual                                                                                                                      Connect a second
    CableCARDTM                      Interface/Component2)                                                        Audio/Video Input                              TV or Monitor.
    received from Cable              Input/                                                                       Connect audio/video
    Service Provider.                Digital Audio Output                                                         output from an                       CABLE Input
                                     Connect digital audio from                                                   external device to   Connect cable signals to this
                HDMI1/DVI, HDMI 2 various types of equipment.                                                                         jack, either directly or through
                                                                                                                  these jacks.
                Connect a HDMI sig- Note: In standby mode,                                                                                                a cable box.
                nal to HDMI1/DVI or these ports will not work.
                HDMI2. Or connect a                                                                                                                                     Power Cord Socket
                DVI(Video) signal to                                                                                                        This TV operates on an AC power. The voltage
                HDMI1/DVI.                                                                                                                   is indicated on the Specifications page. Never
                                                                                                                                                    attempt to operate the TV on DC power.




Note: After removing the cover, you can insert the CableCARDTM or connect to the G-LINK jack.




                                                                                                        - 5 -
                                DESCRIPTION OF CONTROLS

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


                                                                                                   TV/VIDEO
                                                                                                  External input modes rotate in regular
                                  POWER                                                           sequence: Antenna, Cable, Video, Front
   Turns your TV or any other programmed                TV INPUT                       TV/VIDEO
                                                                                                  Video, Component 1-2, RGB-DTV (or
  equipment on or off, depending on mode.                                                         RGB-PC), HDMI1/DVI and HDMI2 input
                                                                                                  sources.
                                    MODE                                                          (Video, Front Video, Component 1-2 input
                                                                          MODE

   Selects the remote operating mode: TV,                                                         sources are linked automatically, only if
 DVD, VCR, AUDIO, CABLE or STB. Select                                                            these are connected )
   a mode other than TV, for the remote to
                operate an external device.
                                                                                        DAY
                                                          DAY -                               +


                                                                                                  TV GUIDE
                                      MENU
                                                                                                  Brings up the TV Guide On Screen sys-
    Brings up the main menu to the screen.
                                                                                                  tem to the screen.
Enters or exits a Panel Menu in the TV Guide
                          On Screen system.
                                                                                                  INFO
                                                          EXIT
                                                                                                  Channel information is displayed on top of
                                       EXIT                        1394                           the screen. But not available in
Clears all on-screen displays and returns to                                                      Component 1-2, RGB, HDMI1/DVI and
                                                                                                  HDMI2 mode.
                 TV viewing from any menu.


                                                                                                  Mark
                                     MUTE                                                         Selects a photo or music you want to
                Switches the sound on or off.                                                     view or play in Xstudio mode.


                                     TIMER                                                        FAV
  Lets you select the amount of time before                                         FLASHBK       Scrolls the Favorite channels.
       your TV turns itself off automatically.

                                                                                                  FLASHBK
                                                                                                  Tunes to the recent channels.
                                   ADJUST                                     APM

 Adjusts screen position, size, and phase in
                                                           CC      FREEZE   AUTO DEMO M/C EJECT
                                  PC mode.                                                        PIP
                                                                                                  Switches to PIP, POP (Picture-out-of-
                                     EZ PIC                                                       Picture) and Twin picture modes in regu-
                                                                                                  lar sequence.
      Selects a factory preset picture mode                                                       Switches the video window locking or
    depending on the viewing environment.                                                         unlocking in the Listings Grid.
                                                                                                  PIPCH-/PIPCH+
                                                                                                  Changes to the next higher/lower PIP
                                                                                                  channel.
                                    FREEZE
 Freezes the currently-viewed picture. Main                                                       PIP INPUT
 picture is frozen in PIP/Twin picture mode.                                                      Selects the input source for the sub pic-
                                                                                                  ture in PIP/Twin picture mode.
                                                                                                  SWAP
                              AUTO DEMO                                                           Exchanges the main/sub images in
Starts the demonstration to explain the main                                                      PIP/Twin picture mode.
                        features of this TV.




                                              LIGHT
                       Illuminates the remote control
                           buttons of selected mode.




                                                                    - 6 -
                                 DESCRIPTION OF CONTROLS

                                    TV INPUT
  



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