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LG_MT-42PZ44_MT-42PZ45_MT-42PZ47_RT-42PZ45V_[SM]


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




PLASMA MONITOR/TUNER
SERVICE MANUAL
CHASSIS : RF-03FA

MODEL : MT-42PZ44/S/45M/V/VB/47M/V
MODEL : MZ-42PZ44/S/45V/VS
MODEL : RT-42PZ45V
MODEL : RT/RZ-BA50
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
                                             CONTENTS




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

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

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

ADJUSTMENT INSTRUCTIONS ......................................................................17

BLOCK DIAGRAM .............................................................................................19

ASSEMBLY METHOD........................................................................................20

PRINTED CIRCUIT BOARD ..............................................................................25

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

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

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

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




                                                     - 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


                                                                                     



                                                                                                                                                  INPUT
                                           ON/OFF                                                                                                  SELECT   MENU   VOL.




                            Main Power Button                                                                                                                             D,E   Buttons
                                                                                                                INPUT SELECT Button

                                                                    Remote Control Sensor                                                                     VOLUME (F,G) Buttons
                                                                                                                                  MENU Button                                Power Standby Indicator
                                                                                                                                                                      Illuminates red in standby mode,
                                                                                                                                                                            Illuminates green when the
                                                                                                                                                                                   Monitor is turned on

                                                                                               




                                                                                                                      R AUDIO L    Y         PB      PR                                 R AUDIO L (MONO)
   ( )R( )       ( )L ( )                                                                                                                                   REMOTE
                                                                                                       EXPANDED                                             CONTROL
                             RS-232C INPUT          DVI INPUT   RGB INPUT   AUDIO INPUT   RGB OUTPUT                AUDIO INPUT        COMPONENT INPUT                S-VIDEO   VIDEO   AUDIO INPUT         AC INPUT
    EXTERNAL SPEAKER         (CONTROL/SERVICE)                                                          INPUT                                                                   INPUT




 RS-232C                                                              AUDIO                                               AUDIO                             S-VIDEO                                        AUDIO
 INPUT                                                                INPUT                                               INPUT                             INPUT                                          INPUT
                        DVI INPUT
                                                                                     RGB                 EXPANDED
                                                                                                         INPUT                                 COMPO-                                             VIDEO
                                           RGB INPUT                                 OUTPUT                                                 NENT INPUT                                            INPUT




                              Connection to PC                                                                                                Connection to AV equipment
Note: The connection cables shown above to the right are not included with the Monitor.
     A D-sub 15-pin cable and a DVI cable are provided to connect the Monitor to a PC.


                                                                                                         - 4 -
                                                                                                                                  


RT-BA50
    DC IN     ANT IN        AV(EXPANDED) INPUT                AV OUTPUT                REMOTE
  (DC 12V)    +75                                                                      CONTROL       EXPANDED OUTPUT

                              R AUDIO L (MONO) VIDEO        R AUDIO L     VIDEO
                                                                                                                              EXPANDED
                                                                                                                              OUTPUT



DC IN                     AV(EXPAND AV OUT- REMOTE
(DC 12V)                   ED) INPUT  PUT   CONTROL
              ANTENA INPUT
RZ-BA50
   REMOTE        DC IN     ANT IN
   CONTROL     (DC 12V)    +75            AV1(EXPANDED)                 AV2(EXPANDED)             EXPANDED OUTPUT




                                               AV1/2 (EXPAND-
                                                 ED) INPUT




      RCA Type




                                                                                                                                                      R AUDIO L   Y         PB      PR                               R AUDIO L (MONO)
             ( )R( )         ( )L ( )                                                                                                                                                    REMOTE
                                                                                                                                                                                         CONTROL
                                                       RS-232C INPUT              DVI INPUT      RGB INPUT    AUDIO INPUT   RGB OUTPUT   EXPANDED   AUDIO INPUT       COMPONENT INPUT              S-VIDEO   VIDEO   AUDIO INPUT           AC INPUT
             EXTERNAL SPEAKER                      (CONTROL/SERVICE)                                                                      INPUT                                                              INPUT




       EXTERNAL                                      DVI INPUT/RGB                                                                                        AUDIO INPUT/COMPONENT INPUT /
       SPEAKER (8                                    INPUT/AUDIO INPUT /                                                                                  REMOTE CONTROL / S-VIDEO/VIDEO
       ohm output)                                   RGB OUTPUT                                                                                           INPUT/AUDIO INPUT
                                       RS-232C INPUT                 EXPANDED INPUT                                                                                                                                                     POWER CORD
                                       (CONTROL/SE                                                                                                                                                                                      SOCKET
                                       RVICE) PORT




      Scart Type




             ( )R( )         ( )L ( )
                                                       RS-232C INPUT              DVI INPUT      RGB INPUT    AUDIO INPUT   RGB OUTPUT   EXPANDED                                                                                          AC INPUT
             EXTERNAL SPEAKER                      (CONTROL/SERVICE)                                                                      INPUT




                                                                                                                                                                      EURO SCART SOCKET




                                                                                                                                          - 5 -
- This function works only when the PDP Tuner is installed on the LG plasma display monitor.


Installing PDP Tuner on the Monitor
1. Turn the monitor off and disconnect the mains plug.
2. Carefully place the Monitor screen side down on a cushioned surface that will protect the monitor screen from
   damage.
3. Mount the PDP Tuner gently into the correct position. Make sure it is inserted correctly.
4. Tighten the screws.
5. Connent the EXPANDED OUTPUT socket the on the PDP Tuner to the EXPANDED INPUT socket on the
   Monitor.
6. Turn the monitor on.



Antenna Connection
- Connect the Plasma Display with various external equipments after connecting the Monitor with the PDP
  Tuner and the Speakers.
  1. Connect the RF out socket of the VCR to the aerial socket on the
     back of the monitor.
  2. Connect the aerial cable to the RF aerial in socket of the VCR.
  3. Store the VCR channel on the programme number 0 using the                                                                                                                                                        DC IN
                                                                                                                                                                                                                    (DC 12V)
                                                                                                                                                                                                                                ANT IN
                                                                                                                                                                                                                                +75 
                                                                                                                                                                                                                                           AV(EXPANDED) INPUT          AV OUTPUT             REMOTE
                                                                                                                                                                                                                                                                                             CONTROL      EXPANDED OUTPUT



     `Manual programme tuning' section.                                                                                                                                                                                                     R AUDIO L (MONO) VIDEO   R AUDIO L     VIDEO




  4. Select the programme number where the VCR channel is stored.
  5. Press the PLAY button on the VCR.
                                                                                                                                                                                                                                         < Back panel of the PDP Tuner >




                                                                                                                                                                                                                                         VCR



Monitor Out Setup
The PDP Tuner has a special signal output capability which allows you to hook up a second TV or monitor.

Just connect the second TV or monitor to the AV OUTPUT socket on the PDP Tuner. See the Operating Manual
of the second TV or monitor for further details regarding that device's input settings.




  < Back panel of the PDP Tuner >                                                                                                                           or       < Back panel of the PDP Tuner >
                                                                                                        ANT OUT                                                                                                                                                                  ANT OUT
     DC IN     ANT IN   AV(EXPANDED) INPUT           AV OUTPUT            REMOTE                                                                                      REMOTE      DC IN    ANT IN
   (DC 12V)    +75                                                        CONTROL   EXPANDED OUTPUT                                                                   CONTROL   (DC 12V)   +75      AV1(EXPANDED)       AV2(EXPANDED)       EXPANDED OUTPUT

                         R AUDIO L (MONO) VIDEO    R AUDIO L     VIDEO

                                                                                                                  S-VIDEO                                                                                                                                                                     S-VIDEO
                                                                                                         ANT IN             OUT                                                                                                                                                     ANT IN              OUT

                                                                                                                                  (R) AUDIO (L)   VIDEO                                                                                                                                                       (R) AUDIO (L)   VIDEO

                                                                                                                            IN                                                                                                                                                                          IN




                                                                         RZ-BA50                                                                                    RT-BA50
                                                                                                      Monitor OUT                                                                                          Monitor OUT
                                                           Input Mode                                                                                            Input Mode
                                                                                                      (AV2(EXP.))                                                                                           (AV(EXP.))
                                                  TV, AV, AV1(EXP.)                                                                                        TV, AV(EXP.), AV or S-
              Normal                                                                                  Main Picture                          Normal                                                          Main Picture
                                                      or S-Video                                                                                                   Video
                                        Main    RGB, DVI or                                                                                                Main     RGB, DVI or
                                       Picture   Component                                                                                                Picture   Component
                                                                                                      Sub Picture                                                                                            Sub Picture
                                        Sub                                                                                                                Sub
                                               TV or AV1(EXP.)                                                                                                      TV, AV(EXP.)
          PIP/DW                       Picture                                                                                             PIP/DW         Picture
                                                                           TV, AV,
                                        Main                                                                                                               Main     TV, AV(EXP.),
                                                                         AV1(EXP.) or                 Main Picture                                                                                          Main Picture
                                       Picture                                                                                                            Picture   AV or S-Video
                                                                           S-Video



                                                                                                                                                          - 6 -
Watching VCR
- When connecting the Monitor to external equipment, match the colours of connecting ports (Video - yellow, Audio (L) - white,
  Audio (R) -red).
- Connect the VIDEO INPUT socket (yellow) with the BNC-RCA adaptor to the VIDEO INPUT on the Monitor.
- If you have a mono VCR, connect the audio cable from the VCR to the AUDIO (L/MONO) input on the Monitor.
- If you connect an S-VIDEO VCR to the S-VIDEO input, the picture quality is improved; compared to connecting a regular VCR
  to the Video input.
  Or, connect the Euro scart socket of the VCR to the Euro scart socket of the monitor.
- Use the orbiter function to Avoid having a fixed image remain on the screen for a long period of time. Typically a frozen still pic-
  ture from a VCR.
  If a 4:3 picture format is used; the fixed image may remain visible on the screen.
- To avoid picture noise (interference), leave an adequate distance between the VCR and Monitor.

  Watching TV programmes
  - Turn the Plasma Display on and select the programme you                                                                                                                         DC IN
                                                                                                                                                                                  (DC 12V)
                                                                                                                                                                                             ANT IN
                                                                                                                                                                                             +75 
                                                                                                                                                                                                        AV(EXPANDED) INPUT           AV OUTPUT           REMOTE
                                                                                                                                                                                                                                                         CONTROL   EXPANDED OUTPUT

    want.                                                                                                                                                                                                R AUDIO L (MONO) VIDEO    R AUDIO L     VIDEO




  Watching VCR
  1. Use the INPUT SELECT button on the remote control to select
     AV (AV1 or AV2) or AV(EXP.) (AV1(EXP.) or AV2(EXP.)).                                                                                                                                                                                                     < Back panel of
  - If both S-VIDEO and VIDEO sockets have been connected to                                                                                                                                                                                                   the PDP Tuner >
     the S-VHS VCR simultaneously, only the S-VIDEO can be
     received.
  - If connected to S-VIDEO, select the S-Video external input
                                                                                                                                                                                                      S-VIDEO
     source.                                                                                                                                                                                                        OUT

                                                                                                                                                                                                                              (R) AUDIO (L)          VIDEO
  2. Insert a video tape into the VCR and press the PLAY button on
                                                                                                                                                                                                                       IN
     the VCR. (See VCR owner's manual)
                                                                                                                                                                                                                  < VCR >




Watching Cable TV
- After subscribing for a local cable TV station and installing a converter you can watch cable TV.
- For further information of cable TV, contact the local cable TV station.

                                                                                                                                                                           In using connection 1
                                      DC IN
                                    (DC 12V)
                                                   ANT IN
                                                   +75 
                                                               AV(EXPANDED) INPUT              AV OUTPUT                 REMOTE
                                                                                                                         CONTROL          EXPANDED OUTPUT
                                                                                                                                                                           1. Select programme number in programme switch of
                                                                    R AUDIO L (MONO) VIDEO   R AUDIO L     VIDEO                                                              cable box.
                                                                                                                                                                           2. Match the Plasma Display programme with selected
                                                                                                                                                                              programme of cable box.
                                                                                                                                                                           3. Select your desired programme with the remote
                                                                                                               < Back panel of the PDP Tuner >                                control for cable box.
                                               1                                                                                                                           In using connection 2
                                                                                                                                          2
                                                                                                                                                                           1. Use the INPUT SELECT button on the remote con-
                                                                For cable TV                                                                                                  trol and select AV (AV1 or AV2) or AV(EXP.)
                                                                                                                                                                              (AV1(EXP.) or AV2(EXP.)).
                                                                                                                                                                           2. Tune to cable service provided channels using the
            (R) AUDIO (L)   VIDEO                                                                                         (R) AUDIO (L)   VIDEO

      TV                                                                                                           TV
                                                                                                                                                                              cable box.
      VCR                                            RF     Cable                                                  VCR                                        RF   Cable




                                                                           < Cable Box >




                                                                                                                                                            - 7 -
Watching external AV source
                                                                                                                                                                                                  DC IN         ANT IN      AV(EXPANDED) INPUT                 AV OUTPUT                    REMOTE
                                                                                                                                                                                                (DC 12V)        +75                                                                         CONTROL             EXPANDED OUTPUT

- When connecting the monitor to an external source, match the colours of                                                                                                                                                       R AUDIO L (MONO) VIDEO       R AUDIO L      VIDEO



  AUDIO/VIDEO input jacks on the monitor with the output jacks on the
  audio/video equipment: Video = yellow, Audio (Left) = white, Audio
  (Right) = red.
  Or, connect the Euro scart socket of the VCR to the Euro scart socket of                                                                                                                                                                                   < Back panel of the PDP Tuner >
  the monitor.
  How to use
  1. Use the INPUT SELECT button on the remote control to select AV
     (AV1 or AV2) or AV(EXP.) (AV1(EXP.) or AV2(EXP.)).
  2. Operate the corresponding external equipment. See external equip-                                                                                                                                                                                                                                                            Camcorder
     ment operating guide.


                                                                                                                                                                                                                                R     AUDIO        L           VIDEO
                                                                                                                                                                                                                                                                                                                                 Video game set
                                                                                                                                                                                        < Back of the external equipment >



Watching DVD
                                                                                                                                                                  How to connect
   < Back panel of the PDP Tuner >
                                                                                                                                                                    Connect DVD video inputs to Y, PB, PR of COMPONENT INPUT
                  DC IN
                (DC 12V)
                            ANT IN
                            +75 
                                        AV(EXPANDED) INPUT                 AV OUTPUT                  REMOTE
                                                                                                      CONTROL        EXPANDED OUTPUT                                and audio inputs to Audio sockets of AUDIO INPUT.
                                          R AUDIO L (MONO) VIDEO         R AUDIO L        VIDEO
                                                                                                                                                                    Or, connect the Euro scart socket of the VCR to the Euro scart
                                                                                                                                                                    socket of the set.
                                                                                                                                                                  How to use
                                                                                                                                                                  1. Turn on the DVD player, and insert a DVD.
                                                                                                                                                                  2. Use INPUT SELECT button on the remote control to select
                                                                                                                                                                     Component or (AV1 or AV2) or (AV1(EXP.) or AV2(EXP.)).
                                                                                                                                                                     Refer to the DVD player's manual for operating instructions.

                                       R AUDIO L             Y           PB          PR
                                                                                            REMOTE                             R AUDIO L (MONO)
                                                                                                                                                                  



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