Service Manuals, User Guides, Schematic Diagrams or docs for : LG Monitor LG_42PC1D_DV_PDP42V8_PD61A_[SM]

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LG_42PC1D_DV_PDP42V8_PD61A_[SM]


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                                                  website:http://biz.LGservice.com
                                  e-mail:http://www.LGEservice.com/techsup.html




PLASMA TV
SERVICE MANUAL
CHASSIS : PD61A

MODEL : 42PC1D/DV
                  42PC1D/DV-EC

CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
                                             CONTENTS




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

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

SPECIFICATIONS ..............................................................................................10

ADJUSTMENT INSTRUCTIONS .......................................................................12

TROUBLE SHOOTING GUIDE ..........................................................................17

PRINTED CIRCUIT DIAGRAM ..........................................................................22

BLOCK DIAGRAM .............................................................................................26

EXPLODED VIEW .........................................................................................28,30

EXPLODED VIEW PARTS LIST ...................................................................29,31

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

SCHEMATIC DIAGRAM.........................................................................................
                                             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.
                                                    DESCRIPTION OF CONTROLS

                                                            POWER
                                                            Switches the set between ON and STANDBY.
                                                            D/A TV (Digital TV / Analogue TV)
                                                            Selects digital or analogue mode.
                                                            INPUT
D/A TV                                INPUT                 Selects the DTV, TV, AV, Component, RGB or HDMI
                    POWER
                                                            modes.
                                                            switches the set on from standby.
                    DVD               VCR
  TV


 GUIDE
                    ARC              SUBTITLE
                                                /           TV, DVD, VCR
            PIP PR+ SWAP
                                                            Selects the remote operating mode: TV, VCR, DVD.
                                      PIP INP
PIP PR
       -                                        UT          Select other operating modes, for the remote to oper-
 PIP
             INFO    i       BACK
                                       SLEEP                ate external devices.

                    TEXT
                                     EXIT
                                                            GUIDE
  MENU
                                                            Shows programme schedule.

                                                            ARC (Aspect Ratio Control)
                     OK
                                                            Selects your desired picture format.

                                                            SUBTITLE/
                                                                       *
                                                            Recalls your preferred subtitle in digital mode.



                                                            PIP
VOL         MUTE             FAV        PR
                                                            Switches the sub picture on or off,select PIP, DW1/2
                                                            or POP modes.

       1                 2            3                     SIZE
                                                            Adjusts the sub picture size.
       4                 5            6
                                                            POSITION
       7                 8            9                     Moves the sub picture position.
  LIST                   0          Q.VIEW
                                                            PIP PR +/-
                                                            Selects a programme for the sub picture.
SIZE       POSITION          INDEX REVEAL
                                i           ?               SWAP
TIME         I/II                                           Alternates between main and sub picture.

                                                            PIP INPUT
                                                            Selects the input mode for the sub picture.


                                                            BACK
                                                            Allow the user to move back one step in an inter-
                                                            active application, EPG or other user interaction
                                                            function.
                                                            SLEEP
                                                            Sets the sleep timer.
                                                     MENU
                                                     Displays on screen menus one by one.
                                                     Exits the current menu.
                                                     Memorizes menu changes.

D/A TV                                INPUT          TELETEXT BUTTONS
                    POWER                            These buttons are used for teletext.
                                                     Text button is used to enable teletext services while
  TV
                    DVD               VCR            other buttons are for teletext functions. * For further
                    ARC
                                                     details, see the `Teletext' section.
                                     SUBTITLE
 GUIDE                                          /

            PIP PR+ SWAP              PIP INP
       -
PIP PR                                          UT
             INFO    i       BACK                    EXIT
                                       SLEEP
 PIP                                                 Clears all on-screen displays and returns to TV
                    TEXT
                                                     viewing from any menu.
  MENU                               EXIT

                                                     OK
                                                     Accepts your selection or displays the current
                     OK
                                                     mode.

                                                     D /E /F /G
                                                     Adjusts menu settings.
                                                     Selects menu item.

                                                     COLOURED BUTTONS
VOL         MUTE             FAV        PR           They are used as per the indications or functions dis-
                                                     played on TV screen in case of Text displays
                                                     (Teletext, EPG) and programme edit.
       1                 2            3

       4                 5            6              VOL D / E (Volume Up/Down)
                                                     Increases/decreases sound level.
       7                 8            9
                                                     PR D / E (Programme Up/Down)
  LIST                   0          Q.VIEW           Selects a programme.
                                                     MUTE
SIZE       POSITION          INDEX REVEAL            Switches the sound on or off.
                                i           ?

TIME         I/II                                    FAV (FAVOURITE)
                                                     Displays the selected favourite programmes.



                                                     NUMBER BUTTONS


                                                     LIST
                                                     Displays the programme table.
                                                     Q.VIEW
                                                     Returns to the previously viewed programme.
Front Panel Controls




                              INPUT   MENU    OK         VOL          PR




                           INPUT Button
                                             OK Button     PROGRAMME Buttons
Power/Standby
Indicator              POWER Button



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