Service Manuals, User Guides, Schematic Diagrams or docs for : LG Monitor LG_42PX4DV-EA_DF-054A_[SM]

<< Back | Home

Most service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.




Image preview - the first page of the document
LG_42PX4DV-EA_DF-054A_[SM]


>> Download LG_42PX4DV-EA_DF-054A_[SM] documenatation <<

Text preview - extract from the document
                                                  website:http://biz.LGservice.com
                                  e-mail:http://www.LGEservice.com/techsup.html




PLASMA TV
SERVICE MANUAL
CHASSIS : DF-054A

MODEL : 42PX4DV
                42PX4DV-EA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
                                              CONTENTS




SAFETY PRECAUTIONS ....................................................................................3

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

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

ADJUSTMENT INSTRUCTIONS .......................................................................10

TROUBLE SHOOTING GUIDE ..........................................................................15

PRINTED CIRCUIT DIAGRAM ..........................................................................24

BLOCK DIAGRAM .............................................................................................28

EXPLODED VIEW ..............................................................................................30

EXPLODED VIEW PARTS LIST ........................................................................31

REPLACEMENT PARTS LIST...........................................................................32

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

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




                                                      - 2 -
                                             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 isolation 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 circuitry that may be             voltage measurements for each exposed 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 specified, 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 position, 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
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.




                                                                 - 3 -
                                DESCRIPTION OF CONTROLS



                                                                                                      POWER
                                    D/A TV                                                            switches the set on from standby or off to
          selects analogue or digital mode.                                                           standby.
                                                                                                      INPUT
                                    MODE       D/A TV                                   INPUT         Selects the TV, AV, Component, RGB or
                    Selects another device.                       POWER                               HDMI modes.
                                                                                                      switches the set on from standby.
                                   GUIDE
                                                                       DVD
            shows a programme schedule.                                                 VCR
                                                 TV
                                                                                                      SUBTITLE/
                    (In Digital mode only)
                                               GUIDE
                                                                       ARC
                                                                                      SUBTITL
                                                                                                E/
                                                                                                                    *
                                                                                                      switches the subtitle on or off in Digital mode.
                                       PIP
         Switches the sub picture on or off.                   PIP PR+    SWAP
                                               PIP P
                                                      R-                               PIP IN
                                                                                                PUT   ARC
                Selects PIP or DW modes.                                                              Changes the picture format.
                               PIP PR + /-                      PSM          SSM
                                                                                         SLEEP
                                                PIP
 Selects a programme for the sub picture.                                                             SLEEP
                                    SWAP                                                              Sets the sleep timer.
 Alternates between main and sub picture.                              TEXT
                                                           U                          EXIT
                                                MEN
                                PIP INPUT
Selects the input mode for the sub picture.                                                           SSM
                                                                                                      To select the sound appropriate to your
                                                                                                      viewing programme.
                                                                       OK
                                                                                                      EXIT
                                        PSM                                                           Clears all on-screen displays and returns to
Adjusts the factory preset picture according                                                          TV viewing from any menu.
                                to the room.
                                                                                                i /
                                                                                                      TEXT
                                                                                       INFO           These buttons are used for teletext.
                                    MENU                                                              For further details, see the `Teletext' section.
   Displays on screen menus one by one.                                                               COLOURED BUTTONS : These buttons are
                   Exits the current menu.                                                            used for teletext (only TELETEXT models) or
               Memorizes menu changes.         VOL             MUTE          FAV          PR
                                                                                                      programme edit.
                                                                                                      INFO/ i /
                                        OK
     accepts your selection or displays the                                                                     *   (option)
                                                                                                      displays information on top of the screen
                             current mode.                                                            whilst watching the TV.
                                                                                                      (In Digital mode only)
                           D / E or F / G
                    Adjusts menu settings.                                                            VOL D / E (Volume Up/Down)
                       Selects menu item.                                                             Increases/decreases sound level.
                                                                                                      PR D / E (Programme Up/Down)
                                   MUTE                                                               Selects a programme.
              Switches the sound on or off.
                                                  LIST                               Q.VIEW
                                                                                                      FAV
                        NUMBER buttons                                                                selects a favourite programme.
                                                 SIZE          POSITION      INDEX     HOLD

                                    LIST
            Displays the programme table.        TIME          REVEAL         MIX        I/II         Q.VIEW
                  (In Analogue mode only)                          ?                                  Returns to the previously viewed programme.

                     VCR/DVD BUTTONS
    Controls a LG video cassette recorder.                                                            I/II
                controls a LG DVD player.                                                             Selects the language during dual language
                                                                                                      broadcast.
                                                                                                      Selects the sound output.




                                                                 - 4 -
                                                   




                                                                                                7
                                                                                                8




                                                  TV/AV   MENU   OK          VOL              PR



                            2              1        3      4      5                    6




1. Power Button                                                  6. D / E (Programme Up/Down)
   Switches the set on from standby or off to standby.              Selects a programme or a menu item.
                                                                    Switches the set on from standby.
2. Remote Control Sensor
                                                                    F / G (Volume Up/Down)
3. TV/AV Button                                                     Adjusts the volume.
   Selects the TV, AV, Component, RGB or HDMI modes.                Adjusts menu settings.
   Switches the set on from standby.
                                                                 7. Power Indicator
4. MENU                                                             Illuminates red in standby mode, Illuminates green when the
   Displays on screen menus one by one.                             set is turned on
   Exits the current menu.
                                                                 8. Intelligent Eye
   Memorizes menu changes.
                                                                    Adjusts picture according to the surrounding conditions.
5. OK
   Accepts your selection or displays the current mode.




                                                            - 5 -
                                                       




                                                                                                                         AV5
                                                                                                                        S-VIDEO




                                                                                                         VIDEO
                                                                                                                                  11




                                                                                                         L/MONO AUDIO
                                                                                                         R
                                                                                                                                  AC INPUT




           1                   2       3   4     5            6           7          8          9                                  10



1. PCMCIA (Personal Computer Memory Card                          8. COMPONENT INPUT
   International Association) Card Slot                              Connect DVD video outputs to Y, PB, PR of COMPONENT
                                                                     INPUT and audio outputs to Audio sockets of AUDIO
2. ANTENNA INPUT/OUTPUT                                              INPUT.
3. HDMI(DVI VIDEO) / AUDIO INPUT / RGB INPUT                      9. EURO SCART SOCKET
   Connect the monitor output socket of the PERSONAL                 Connect the euro scart socket of the VCR to these sockets.
   COMPUTER to this socket.
                                                                  Note:
   Note: If you want to use RGB/DVI audio, we strongly               a. If you want to use the EURO scart cable, you have to
   recommend that you use the cable that has a core, or the          use the signal shielded Euro scart cable.
   EMI Filter core along with separate cable.                        b. If the S-VIDEO(Y/C) signal is received through the Euro
4. REMOTE CONTROL                                                    scart socket 2 (AV2), you must change to the SAV2 mode.
5. VARIABLE AUDIO OUT SOCKETS                                     10. POWER CORD SOCKET
                                                                      This set operates on AC power. The voltage is indicated on
6. RS-232C INPUT (CONTROL/SERVICE) PORT                               the Specifications page. Never attempt to operate the
   Connect to the RS-232C port on a PC.                               Monitor on DC power.
7. AUDIO/VIDEO IN SOCKETS (AV4)                                   11. AUDIO/VIDEO IN SOCKETS (AV5)
   Connect the audio/video out sockets of external equipment          S-VIDEO/AUDIO IN SOCKETS
   to these sockets.
   S-VIDEO/AUDIO IN SOCKETS
   Connect the S-VIDEO out socket of an VCR to the S-VIDEO
   socket.
   Connect the audio out sockets of the VCR to the audio
   sockets as in AV4.


                                                              - 6 -
Accessories
                                                                       D/A TV                                INPUT
                                                                                     POWER

                                                                                            DVD
                                                                         TV                                  VCR

                                                                                            ARC
                                                                                                            SLEEP
                                                                       GUIDE




                                                                                    INFO


                                                                                          TEXT
                                                                                                           EXIT
                                                                        MENU




                                                                                          OK




                                                                       VOL        MUTE            FAV          PR




                                                                          LIST                            Q.VIEW


                                                                         SIZE     UPDATE          INDEX     STILL


                                                                         TIME     REVEAL           MIX        I/II
                                                                                      ?

                                                                        PIP PR-   PIP PR+         SWAP     PIP INPUT



                                                                          PIP      PSM            SSM



                 LG TV

               AS mark




         Owner's Manual                                Remote Control handset                                                                   2-Eye Bolts




                    1.5V
                      1.5V


        Alkaline batteries                                          Power Cord                                                                2-Wall brackets




Joining the set assembly to the wall to prevent the set tumbling
- Secure the set assembly by fixing it to a wall by using the Eye Bolts/Wall brackets.


                                                         



◦ Jabse Service Manual Search 2020 ◦ Jabse Pravopis ◦ Other service manual resources online : FixyaeServiceinfo