Beko 23WL46G Service Manual

L6b tft- lcd tv
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23WL46G
30WL46G
L6B TFT- LCD TV
SERVICE MANUAL

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  Summary of Contents for Beko 23WL46G

  • Page 1 23WL46G 30WL46G L6B TFT- LCD TV SERVICE MANUAL...
  • Page 2 CONTENTS PAGES Safety instructions Technical specifications Panel Specification Back appearance of TV Interconnectıon Diagram Block diagram Block diagram of power supply Service mode Service Mode items and values Data sheet of important IC’s and parts Recommended Part List Frequency list of channels...
  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS GENERAL GUIDELINES There are electro-static sensitive components such as CMOS in LCD Module. Please earth human 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.
  • Page 4 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 Graphics Based 8-bit\pixel Level (1.5, 2.5, Teleweb) Teletext 1.5 Teletext...
  • Page 5: Panel Specification

    PANEL SPECIFICATION Sizes 22" 23" 26" 27" 30" 32" Samsung Samsung Chimei Manufacturer Samsung Chimei Philips Hannstar Philips 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)>=...
  • Page 6 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...
  • Page 7 TO PANEL MAIN CHASSIS JP453 POWER JP452 JP451 SUPPLY MODULE S150 SPEAKER S550 PANEL S350 JP450 MAIN POWER TO HEADPHONE JACK SWITCH MODULE IR RECEIVER/LED KEY BOARD 220V AC MODULE MODULE INPUT...
  • Page 8 L6B BLOCK DIAGRAM Video-Main SDRAM RF In IF IC TDA9886T Tuner-Main MT48LC16M 16 Bit PW1231 Tuner-PIP IF IC TDA9886T EEPROM De-Interlacer 24C64 24 Bit RGB AV-Out Video Flash Memory AM29VL160 AV4 Video-In Video-PIP Video Switch PW181 TDA6415C Video In/Out 16 Bit IMAGE PROCESSOR Progressive...
  • Page 9 L6B POWER SUPPLY BLOCK DIAGRAM (MAIN CHASSIS) J450 F450 +2,5V_STBY U454 U458 U451 (5V) +5V_STBY LM2576 NCP1117 FDS9933A DC_IN F451 VOLTAGE S450 +3,3V_STBY DOUBLER '33V +1,5V_STBY U450 NCP117 12V_AMP U452 FDS9933N U456 U457 LM317 STAND_BY +3,3V NCP1117 U453 U455 +12V PANEL_POWER FDS9933N LM2576...
  • Page 10: Activating The Service Menu

    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...
  • Page 11 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.
  • Page 12: Display Menu

    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 nicam prescale fm/am prescale agc adjust red brightness red contrast green brightness green contrast blue brightness blue contrast calibre menu ITEM TYPICAL VALUES/OPTIONS...
  • Page 13: Pin Connections

    TEA6415C BUS-CONTROLLED VIDEO MATRIX SWITCH 20MHz BANDWIDTH CASCADABLE WITH ANOTHER TEA6415C (INTERNAL ADDRESS CAN BE CHANGED BY PIN 7 VOLTAGE) 8 INPUTS (CVBS, RGB, MAC, CHROMA, ...) 6 OUTPUTS POSSIBILITY OF MAC OR CHROMA SIGNAL FOR EACH INPUT BY SWITCHING-OFF THE DIP20 CLAMP WITH AN EXTERNAL RESISTOR (Plastic Package)
  • Page 14: Block Diagram

    TEA6415C BLOCK DIAGRAM P ERI P ERI LUMA CHROMA DEC. POWER CVBS (MAC/DEC) CVBS (P ERI P LUG1) CVBS (AM TUNER) MAC S IGNAL (AMTUNER) CVBS (P ERI P LUG2) CVBS (FM TUNER) MAC S IGNAL (FM TUNER) SYNCHRO (TTX/BTX) DECODER DATA P ROG...
  • Page 15 C-bus controlled single and multistandard TDA9885; TDA9886 alignment-free IF-PLL demodulators FEATURES • 5 V supply voltage • Gain controlled wide-band Vision Intermediate Frequency (VIF) amplifier, AC-coupled • Multistandard true synchronous demodulation with active carrier regeneration: very linear demodulation, • SIF-AGC for gain controlled SIF amplifier, single good intermodulation figures, reduced harmonics, and reference QSS mixer able to operate in high excellent pulse response...
  • Page 16 This text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here in _white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here inThis text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.
  • Page 17 TEA6420 BUS-CONTROLLED AUDIO MATRIX 5 STEREO INPUTS 4 STEREO OUPUTS GAIN CONTROL 0/2/4/6dB/MUTE FOR EACH OUTPUT CASCADABLE (2 different addresses) SERIAL BUS CONTROLLED VERY LOW NOISE SHRINK24 VERY LOW DISTORSION (Plastic Package) ORDER CODE : TEA6420 DESCRIPTION SO28 The TEA6420 switches 5 stereo audio inputs on (Plastic Micropackage) 4 stereo outputs.
  • Page 18: Absolute Maximum Ratings

    TEA6420 BLOCK DIAGRAM RIGHT INPUTS GAIN = 0/2/4/6dB RIGHT OUTP UTS SUPPLY BUS DECODER S CL ADDR LEF T OUTP UTS GAIN = 0/2/4/6dB LEF T INPUTS ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit Supply Voltage 10.2 Operating Ambient Temperature 0, + 70 oper Storage Temperature...
  • Page 19: Product Specification

    PW1231 Product Specification General Crystal The PW1231 is a high-quality, digital video signal processor that incorporates Pixelworks’ patented deinterlacing, scaling, and video enhancement algorithms. The PW1231 accepts industry-standard video Video Digital PW1231 Video formats and resolutions, and converts the input into any Decoder Output desired output format.The video algorithms are highly...
  • Page 21: Pinout Information

    Pinout Information Pin Diagram PVDD PVDD PVSS PVSS MPDVSS DPAVSS MPAVDD DPAVDD DPDVSS DPDVDD CGMS TESTCLK TRSTN RESETn MD15 TEST MD14 DCLK MD13 PW1231 MD12 MD11 MD10 (Top View) PVDD PVSS PVSS PVDD MCLK MCAS MRAS MCLKFB MA12 MA11 MA13 MA10 PVDD Figure 2-1 PW1231 Pin Layout...
  • Page 22: General Description

    PW181 Product Specification General Description The PW181 ImageProcessor is a highly integrated Crystal “system-on-a-chip” that interfaces computer graphics and video inputs in virtually any format to a fixed-frequency flat panel display. Video Video Decoder Input Computer and video images from NTSC/PAL to WUXGA PW181 Display at virtually any refresh rate can be resized to fit on a fixed-...
  • Page 23 A(19:0), RAMWE, D(15:0), RAMOE, BHEN, CPUTMS, PortC PortB PortA ROMWE, CS(1:0), CPUTCK, CPUTDO EXTINT RxD, TxD IRRCVR (1:0) (7:0) (7:0) (7:0) CPUTDI ROMOE RD, WR PortD(7:0) PortE(7:0) PortF(7:0) Processor ROM/ 16-bit Watchdog and Interrupt 2-Wire UART GPIO Turbo µP Serial RAM Interface Timers Controller...
  • Page 24: Part Description

    L6B RECOMMEDED SPARE PARTS POSITION PART NUMBER PART DESCRIPTION 056T27-CH1 LCD CHIMEI V270W1-L04 (LCD TV) 056T30-CH1 LCD CHI-MEI V296W1-L14 (LCD TV) 30") 056W26-LP2 LCD LG-PHILIPS LC260W01-A5K6 (LCD TV) L38172 CU ASSY 30'' L6B (ZR1192-21) L57172 CU ASSY 27'' L6B (ZR1192-21) UR3110 L6B CHASIS 27"TOS MS/NX/3/SK/PIP/PEN/DVI US1110...
  • Page 25 SAW828 056010 SAW FILTER OFW K9656M 010861 ON/OFF SWITCH BK98 TU825 Y51136-PH1 TUNER PH UV1316T/SIGH-3 SPL ASIMTRK YAT TU826 Y11136 TUNER HOR.PHILLIPS UV1316/A I H-4 453124 IC-CHIP NCP1117DT33RK TO-252 PACKAGE U150 453195 IC PI5V330W SOIC(W) U151 453350 IC-CHIP PCF8591 /SO16 453262 IC-CHIP AD9887KS-100- DUAL IN.FACE TRAY U250...
  • Page 26: Frequency Table (Mhz)

    FREQUENCY TABLE (MHz) Channel Number L/L' 49.75 49.75 47.75 48.25 59.25 59.25 55.75 55.25 77.25 77.25 60.50 62.25 85.25 85.25 63.75 175.25 93.25 93.25 176.00 182.25 175.25 175.25 184.00 189.25 183.25 183.25 192.00 196.25 191.25 191.25 200.00 203.25 199.25 199.25 208.00 210.25 207.25...
  • Page 27 Channel Number L/L' 663.25 663.25 663.25 663.25 671.25 671.25 671.25 671.25 679.25 679.25 679.25 679.25 687.25 687.25 687.25 687.25 695.25 695.25 695.25 695.25 703.25 703.25 703.25 703.25 711.25 711.25 711.25 711.25 719.25 719.25 719.25 719.25 727.25 727.25 727.25 727.25 735.25 735.25 735.25 735.25...
  • Page 28 Channel Number L/L' 259.25 271.25 271.25 284.75 266.25 279.25 279.25 296.75 273.25 287.25 287.25 55.75 280.25 295.25 295.25 60.50 287.25 303.25 303.25 63.75 294.25 303.25 303.25 311.25 311.25 311.25 311.25 319.25 319.25 319.25 319.25 327.25 327.25 327.25 327.25 335.25 335.25 335.25 335.25 343.25...

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