Service Manuals, User Guides, Schematic Diagrams or docs for : BEKO LCD TV L6B Beko_Chassis_L6B_[SM]

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Beko_Chassis_L6B_[SM]


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L6B TFT- LCD TV

SERVICE MANUAL
                CONTENTS                 PAGES



Safety instructions                        1

Technical specifications                   2

Panel Specification                        3

Back appearance of TV                      5

Interconnection Diagram                    5

Block diagram                              6

Block diagram of power supply              7

Service mode                               8

Service Mode items and values             10

Data sheet of important IC's and parts    11

Recommended Part List                     23

Frequency list of channels                25
                     SAFETY PRECAUTIONS

   GENERAL GUIDELINES                                        There are electro-static sensitive components such
                                                             as CMOS in LCD Module. Please earth human
1. It is advised to insert an isolation transformer in the   body when handle the LCD.In addition, please do
   AC supply before servicing a hot chassis.                 not touch the interface connector pin with bare.
2. Always use the manufacturer's replacement safety
   components. The critical safety components marked           8 - Do not operate for a long time under
                                                                   the same pattern
   with     on the schematics diagrams should not be
                                                             Operating LCD for a long time under the same
   by other substitutes. Other substitute may create the
   electrical shock , fire or other hazards. Take            pattern can cause image persistence and can
   attention to replace the spacers with the originals.      damage it. Please follow following guidance.
   Furthermore where a short circuit has occurred ,          1. Turn the power off when do not use.
   replace those components that indicate evidence of        2. Change the pattern periodically.
   overheating.
3. After servicing , see that all the protective devices     LEAKAGE CURRENT COLD CHECK
   such as insulation barriers, insulation papers, shields   1. Unplug the AC cord and connect a jumper
   and isolation R-C combinations are correctly                   between the two prongs of the plug.
   installed.                                                2. Turn the receiver's power switch.
4. When the receiver is not being used for a long time       3. Measure the resistance value with an ohmmeter,
   of period of time , unplug the power cord of the          between the jumpered AC plug and each exposed
   Adaptor from the AC outlet.                               metallic cabinet part on the receiver. When the exposed
Color TFT LCD Module is very sensitive                       metallic part a return path to the chassis the reading
                                                             should be between 4Mohm and the 20Mohm. When the
both electrically and physically.Users,                      exposed metal does not have a return path to the chassis,
therefore, are requested to follow the                       the reading must be infinite.
"Guidance of handling color TFT LCD
Module"on the followings.                                    LEAKAGE CURRENT HOT CHECK
   1 -Be careful not to make scratch on the                  1. Plug the AC cord directly in to the AC outlet. Do
       polarizer.                                                   not use an isolation transformer for this check.
Surface of polarizer is soft and can be physically           2. Connect a 2Kohm 10W resistor in series with an
damaged easily.Please do not touch, push or rub                     exposed metallic part on the receiver and an earth,
                                                                    such as a water pipe.
polarizer surface with materials over HB hardness.
                                                             3.     Use an AC voltmeter with high impedance to
   2 - Keep clean the surface.
                                                                    measure the potential across the resistor.
Please wear rubber glove when touch the surface of
                                                             4.     Check each exposed metallic part and check the
LCD screen. Please use soft and anti-static material                voltage at the each point.
as cleaner.                                                  5.     Reverse the AC plug at the outlet and repeat each of
   3 -Keep out of water.Water on/in the LCD may                     the above measurements.
cause electrical short or corrosion. Please wipe out         6.     The potential at the any point should not exceed 1.4
dry or water carefully.                                             Vrms. In case a measurement is outside the limits
   4 -Prevent swift Temperature & Humidity                          specified , there is the possibility of a shock hazard ,
change.Instantaneous temperature and/or humidity                    and the receiver should be repaired and rechecked
change can make dew or ice which cause                              before it is returned to the customer.
nonconformance such as malfunction.
 5 - High temperature & high humidity
      reduce the life-time.                                       HOT CHECK CIRCUIT
                                                                                      AC-Voltmeter
LCD is not proper to be used at high temperature
and high humidity. Please keep specified                          TO INSTRUMENTS
                                                                  EXPOSED
temperature and humidity condition.                               METALLIC PARTS                             Water pipe
                                                                                                              (earth)
  6 - Keep out of Corrosive Gas.Corrosive gas
  effect the polarizer and the circuit chemically and
  cause defects accordingly.                                                             2 K Ohm

  7 - Electrostatic discharge can make
      Damage
                                   L6B TECHNICAL SPECIFICATION
Receiving System                                                        PAL B/G+I+D/K SECAM L/L'
Comb Filter                                                                   Adaptive 4H\2H
LTI, CTI Filters                                                                     +
                                            DVI 1.0 Compliant                        +
DVI Receiver                                Resolution                        VGA to SXGA
                                            2 Pixel \ Clk Support                    +
Gamma Correction                                                              8 to 10-bit LUT
PIP\PAP\POP\PAT                                                                      +
OSD                                                                      Graphics Based 8-bit\pixel
                                            Level (1.5, 2.5, Teleweb)           Teletext 1.5
Teletext                                    Type (Fast\Top\Simple)           Simple, Fast, Top
                                            Page Memory                            800p
WSS                                                                                  +
VPS\PDC                                                                              +
                                            4:3                                      +
                                            16:9                                     +
Picture Formats                             14:9                                     +
(4:3, 16:9, 14:9, Panorama, LetterBox,      Panorama                                 +
Subtitle)                                   Letterbox                                +
                                            Subtitle                                 +
                                            Zoom                                     +
WSS (Wide Screen Signalling)                                                         +
ATS (Automatic Tuning System)                                               Frequency Search
Manual Search                                                             Channel Table Search
Number of Program Storage                                                            +
No Ident Timer                                                                       +
Picture Freeze                                                                       +
Equalizer                                                                            +
AVL (Automatic Volume Level)                                                         +
Sound Status Memory                                                                  +
Picture Status Memory                                                                +
Swap                                                                                 +
Child Lock                                                                           +
Program Lock                                                                         +
Picture Format Switching Tru Pin 8                                                   +
Auto RGB Detect Tru Pin 16                                                           +
                                            Off Timer (Sleep Timer)                  +
Timer
                                            On Timer                                 +
Picture Smart (User, Soft, Natural, Rich)                                            +
Sound Smart (User, Music, Sports, Cinema,
                                                                                     +
Speech)
Scart2 Out Selectable                                                                +
S-Video Input Through Scart2                                                         +
                                                                           2x5W for 22"W, 23"W
Audio Output Power
                                                                             2x10W for 26"W
RMS in Max at 10% THD)
                                                                             2x10W for 30"W
Stereo (German A2, Nicam, BTSC)                                             German A2, Nicam
S-video In (DIN)                            1
AV In (3 RCA)                               1
AV Out (3 RCA)                              1
PC Audio (L, R)                             1
D-Sub 15                                    1
Headphone                                   1
CVBS In                                     4
Y\C In                                      1
DVI In                                      YES
CVBS Out                                    4
                                                      PANEL SPECIFICATION
Sizes                  22"                 23"                 26"                  27"                 30"                       32"

                                           Samsung         LG- Samsung          LG-                     Chimei              AUO
Manufacturer           Samsung                                                      Chimei
                                           Philips Hannstar    Philips        AUO                       LG-Philips

Interface              Single LVDS         Single LVDS         Singlel LVDS         Singel LVDS         Single LVDS               Single LVDS

Resolution             WXGA (1280x720)     WXGA (1280x768)     WXGA (1280x768)      WXGA (1280x720)     WXGA (1280x768)           WXGA (1280x768)

Brightness (cd/m2)>=            450                 450                 450                  550                 550                       450

Contrast>=                      500                 400                 400                  600                 600                       700

Response Time
                                 25                  25                  25                   25                  25                        23
(Tr+Tf) msec =<
Viewing Angle
                             85/85 85/85         85/85 85/85         85/85/85/85          85/85/85/85         85/85/85/85               85/85/85/85
R\L\H\L>=

Adaptor nput                    15V                 24V              Built-in TV          Built-in TV         Built-in TV               Built-in TV

PoweR consumptions             100W                100W                120W                  120W               140W                      180W

St-By Power
                                <4W                 <4W                 <4W                  <4W                 <4W                       <4W
Consumption

Input Range            100V-240V/50- 60Hz 100V-240V/50- 60Hz 100V-240V/50- 60Hz 100V-240V/50- 60Hz 100V-240V/50- 60Hz 100V-240V/50- 60Hz
                         BACK SIDE APPEARANCES


                                                     CONTROL
                                                      BOARD




                                                          SPEAKERS




                                                                POWER
                                                                SWITCH



                                      220VAC INPUT

          LED/IR BOARD




                                               POWER SUPPLY
             MAIN                                 BOARD
            CHASSIS




NOTE: LOCATION AND THE SHAPE OF IR /LED BAORD, CONTROL BOARD AND MAIN SWITCH
       BOARD MAY CHANGE ACCORDING TO THE COSMETIC OF THE TV AND SIZE
                                                 TO PANEL




          MAIN CHASSIS                                                       CN1
                                  JP452               JP451   JP453                  POWER
                                                                                     SUPPLY
                                                                                     MODULE
                                          S150



                   SPEAKER

                                          S2
                                                      S550             CN3                  CN2
                    TO
                   PANEL
                                      S350




                                S50                            JP450




                         TO HEADPHONE JACK                                     MAIN POWER
                                                                                 SWITCH
                                                                                MODULE


IR RECEIVER/LED                                   KEY BOARD
    MODULE                                         MODULE                              220V AC
                                                                                        INPUT
                                                                             L6B BLOCK DIAGRAM

                                                                                                                            Video-Main
RF In                                                                                                                                                                                          SDRAM




                                                                                                                                                         Video Decoder
                                                                                                                                                         Multi Standard
                                                            IF IC TDA9886T




                                                                                                                                                          SAA7118MP
           Tuner-Main                                                                                                                                                                         MT48LC16M




                                                                                                                 QSS-Main
                                                                                                                                                                             16 Bit
                                                                                                                                                                              YUV            PW1231
           Tuner-PIP                                     IF IC TDA9886T                                                                                                                                            EEPROM
                                                                                                                                                                                           De-Interlacer




                                                                                                       QSS-PIP
                                                                                      Main-Video
                                                                                                                                                                                                                    24C64




                                                                     PIP-Video
                                                                                                                                                                                        24 Bit RGB
 AV-Out Video                                                                                                                                                                                                                     Flash Memory
  AV4 Video-In                                                                                                                                                                                                                     AM29VL160
                                                                                 Video Switch                                                       Video-PIP                                        PW181
                                                   Video In/Out                   TDA6415C                                                                                           16 Bit          IMAGE




                                                                                                                                                                                                                                          LVDS Transmitter
                                                                                                                                                                  Video Decoder
                                                                                                                                                                  Multi Standard

                                                                                                                                                                   SAA7118MP
                                                                                                                                                                                      YUV          PROCESSOR




                                                                                                                                                                                                                                            DS090C385
                                                                                                                                                                                                   De-Interlacer        Progressive
                 SCART 1 2 3                                           Pin 8 Switch                                                                                                                                     or Intrelaced
                                                                                                                                                                                                      Scaler




                                                                                                                             Scart RGB
                                                                         PCF8591                                                                                                                                         24 Bit Dual                         TO THE
                                                                                                                                                                                                       OSD                                                   PANEL
                                                          I2C Communication                                                                                                                                             RGB ,HS,VS
                                                                                                                                                                                                    Micro-Cont.
                            Audio-In/Out




                                                                                                                                                                                                                          DE,PCLK
                                                                                                                                                                                                   Gamma Corr.
                                                       SC1-SC2 RGB                                                                                                                      IR In
                                                                            RGB Switch
                                                                                                                                                                                                                                          Stand by
                                                                              PI5V30
                                                                                                                                                                                                                                           LED's
          AV4
                                                                                                                                                                                                                                           Reset
        Audio-In
                                                                                                                                                                                                                                            Mute
               Audio-Switch                                                                                                                                                                                                              B/L Enable
                 TDA6420                                                  AUDIO PROCESSOR
                                                         Audio                MSP3410D                                                                                                                                                   Digital Dim
                                                         In-Out


                                                                                                                                         SVHS Y/C
                                                                                                                                                                                                         48 Bit RGB VS/HS
             AV Out Audio




                                                                                                                                                                                              Dual nterface for
                                                                                                                                                                                                    FPD
                                                                                          Audio Amplifier                                                                                         AD9887
                                                                                                                                                                 EEPROM
                                                                                             TA2024                                                               24LC21
                                                                                                                                                                                                                               EEPROM
                                                                                                                                                                                                                                24LC21
                                           Headphone                                                                                                                                RGB HS/VS-In
                                             Amp.                                                                                                                                                                  DVI Input
                                            TDA1308
                                                                                                                                                                                                                  DVI Socket
                                                            PC DVI Audio -In                                                SVHS Socket                                            D-SUB 15 socket
                                                                                                   Speaker
        Headphone Jack
                    L6B POWER SUPPLY BLOCK DIAGRAM (MAIN CHASSIS)


J450
                          12V       F450                                                      +2,5V_STBY
                U451      (5V)                U454          +5V_STBY         U458
              FDS9933A                       LM2576                         NCP1117
DC_IN
        GND
                                 F451                       VOLTAGE
S450                                                        DOUBLER                   +3,3V_STBY


              12V                                            '33V               U450          +1,5V_STBY
                                                                               NCP117
                                           12V_AMP
                              U452
        GND
                            FDS9933N
                                           +5V

                                                   U457                          U456         +8V
                         STAND_BY                 NCP1117   +3,3V               LM317




                             U453          +12V                 U455                          PANEL_POWER
                           FDS9933N                            LM2576


              PNL_EN                                        +12V_INVERTER
                                 L6B SERVICE MENU

1. Activating the Service Menu

    When the menu is on the screen press `9', `3', '0', '1' on the remote controller. This will
activate the service menu.

2. Service Menu Structure

   The service menu has three items: display, calibre and version
   2.1 Display
       Display item has seven options:
       a- Panel
          Panel option gives information about the current panel resolution. It is a read only
          option and can not be set.

       b- Power on time
          Power on time gives information about the last update time of the SW running. It
          is a read only option and can not be set.

       c- Backlight on time
          Backlight on time option reserved.

       d- Scart prescale
          Scart prescale option sets the prescale values for the input sounds entering the scart
          input of the MSP(Micronas Sound Processor). Changing this value you can adjust
          the level of the output sound going to loudspeakers for all the sources except the
          Tuners. The range is between 0 and 100.

       e- nicam prescale
          Nicam prescale option sets the prescale values for the Nicam standard sounds for
          tuner inputs. Changing this value you can adjust the level of the output sound
          going to loudspeakers for Nicam sounds entering the analog sound input of MSP.
          The range is between 0 and 100.

       f- fm/am prescale
          fm/am prescale option sets the prescale values for the FM/AM standard sounds for
          tuner inputs. Changing this value you can adjust the level of the output sound
          going to loudspeakers for FM/AM sounds entering the analog sound input of MSP.
          The range is between 0 and 100.

       g- Agc(Automatic Gain Control) adjust
          Agc adjust option sets the input voltage going to IF decoder AGC pin. Changing
          this value you can adjust this voltage for optimum Tuner performance. The range
          is between 0 and 31.

       h- R/G/B Brightness/Contrast: These are used for color bias adjustment. The range is
          Between 0 and 255
2.2 Calibre
    Calibre item has nine options:
    a- video format
       Video format option force the video format to the desired format. Selectable
       formats are Auto, Pal, NTSC and SECAM.
    b- colorspace
       Colorspace option gives the information about the video input colorspace input to
       PW181 IC. Do not change this value unless an error occurred in the colors
       displayed.

   c- test pattern
      This option activates the internal pattern of PW181 IC. There are 3 choices: none,
      vert bars, solid color. None will deactivate the internal pattern. Vert bars choice
      activates the bar pattern for the selected color component. Solid color activates the
      solid pattern with one color selected in color component and also you can change
      the level of the color by solid field level.

   d- Color components:
      This option selects the color for the internal pattern of PW181 IC. There are 4
      choices: all, red, green and blue. If you choose all, you can see the white pattern
      and if you choose one of the other choices you can see the test pattern with the
      selected color.

   e- solid field level
      This option will adjust the level of the colors for the test pattern. The range is
      betwwen 1 and 64.

   f- Initial ATS
      This option will enable or disable the Initial setup for the TV. Setting this option to
      On, the TV will open from the Quick setup menu. Setting this option to Off will
      disable this option.

   g- factory reset
      Factory reset option executes a reset operation for the NVRAM. Pressing OK
      when this option is selected will erase the NVRAM and load default values to
      NVRAM.

   h- dpms
      This option selects the Power option for the TV. Setting this option to On the TV
      will switch to the last state for power on transition. Setting this to Off will disable
      this option and the TV will always switch to Stand-by state while power on
      transition.

   i- osd timeout
      This option sets the OSD timeout for the main menu structure. Selections are 5, 15
      and 60 secs. The default is 60 sec.

2.3 Version
    This item gives the information about the version of the software. Also you can see the
    last modified time for the GUI(graphical user interface).
           L6 CHASSIS SERVICE MODE ITEMS




display menu
ITEM                          TYPICAL VALUES/OPTIONS
panel                                 1280x768
         power on time                03:39:45
         back light time              03:39:45
scart prescale                           25
nicam prescale                           45
fm/am prescale                           24
agc adjust                               16
red brightness                          128
red contrast                            128
green brightness                        128
green contrast                          128
blue brightness                         128
blue contrast                           128


calibre menu
ITEM                          TYPICAL VALUES/OPTIONS
video format                             auto
color space                              RGB
test pattern                             none
color components                          all
solid field level                         33
initial ats                               on
factory reset                     press  to reset
dpms                                      on
osd time out                            60 sec


version
ITEM                          TYPICAL VALUES/OPTIONS
Software
                           SL630T_CH1_T13 L6B 1.22 Chi30
GUI
             Project; L6B Toshiba
Generated Date:       October 01,2004 at 22.42
                                                                                      TEA6415C

                              BUS-CONTROLLED VIDEO MATRIX SWITCH
s   20MHz BANDWIDTH
s   CASCADABLE WITH ANOTHER TEA6415C
    (INTERNAL ADDRESS CAN BE CHANGED BY
    PIN 7 VOLTAGE)
s   8 INPUTS (CVBS, RGB, MAC, CHROMA, ...)
s   6 OUTPUTS
s   POSSIBILITY OF MAC OR CHROMA SIGNAL
    FOR EACH INPUT BY SWITCHING-OFF THE
                                                                                 DIP20
    CLAMP WITH AN EXTERNAL RESISTOR                                        (Plastic Package)
    BRIDGE
s   BUS CONTROLLED                                                     ORDER CODE : TEA6415C
s   6.5dB GAIN BETWEEN ANY INPUT AND OUT-
    PUT
s   -55dB CROSSTALK AT 5MHz
s   FULLY ESD PROTECTED

DESCRIPTION
The main function of the TEA6415C is to switch 8
video input sources on the 6 outputs.
Each output can be switched to only one of the                                    SO20
inputs whereas but any same input may be con-                            (Plastic Micropackage)
nected to several outputs.
All the switching possibilities are controlled through                ORDER CODE : TEA6415CD
the I2C bus.

PIN CONNECTIONS


                        INPUT       1                    20   INPUT

                        DATA        2                    19   GROUND

                        INPUT       3                    18   OUTPUT

                       CLOCK        4                    17   OUTPUT

                        INPUT       5                    16   OUTPUT

                        INPUT       6                    15   OUTPUT

                        PROG        7                    14   OUTPUT

                        INPUT       8                    13   OUTPUT

                           VCC      9                    12   GROUND
                                                                                                  6415C-01.EPS




                        INPUT       10                   11   INPUT
TEA6415C


BLOCK DIAGRAM
                                           P ERI     P ERI   TTX       LUMA PIP        MAC
                                           TV1       TV2              CHROMA           DEC.
                                                                      POWER

                                                                                               GND
                                            18        17         16     15    14        13         12


                         CVBS
                                      1
                     (MAC/DEC)

                           CVBS
                                      3
                  (P ERI P LUG1)

                          CVBS
                                      5
                    (AM TUNER)

                   MAC S IGNAL
                                      6
                    (AMTUNER)

                           CVBS
                                      8
                  (P ERI P LUG2)

                          CVBS
                                     10
                    (FM TUNER)

                   MAC S IGNAL
                                     11
                   (FM TUNER)

                     SYNCHRO
                                     20
                     (TTX/BTX)


                                                                                                        T
                                                                                                        E
                                                                                                        A
                                                                    BUS
                                                                                                        6
                                                                  DECODER
                                                                                                        4
                                                                                                        1
                                                                                                        5
                                                                                                        C
                                                 2           7          4          9          19                          6415C-02.EPS


                                             DATA          P ROG      CLOCK    VCC           GND



GENERAL DESCRIPTION
The main functionof the IC is to switch 8 video input            input (with external resistor bridge). All the switch-
sources on 6 outputs.                                            ing possibilities are changed through the BUS.
Each output can be switched on only one of each                  Driving 75 load needs an external transistor.
input. On each input an alignment of the lowest                  It is possible to have the same input connected to
level of the signal is made (bottom of synch. top for            several outputs.
CVBS or black level for RGB signals).                            The starting configuration upon power on (power
Each nominal gain between any input and output                   supply : 0 to 10V) is undetermined.
is 6.5dB. For D2MAC or Chroma signal the align-                  In this case, 6 words of 16 bits are necessary to
ment is switched off by forcing, with an external                determine one configuration. In other case, 1 word
resistor bridge, 5 VDC on the input. Each input can              of 16 bits is necessary to determine one configura-
be used as a normal input or as a MAC or Chroma                  tion.
    I2C-bus controlled single and multistandard
                                                                                          TDA9885; TDA9886
    alignment-free IF-PLL demodulators

1    FEATURES



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