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Sanyo LCD-22XR7S Service Manual

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Summary of Contents for Sanyo LCD-22XR7S

  • Page 2: Table Of Contents

    CONTENTS Safety precautions………………………………………………………………………..… Alignment instructions …………………………….…….………………………………… Method of software upgrading…………………………………………………………….. Working principle analysis of the unit……………………………….………….…………. Block diagram…………………………………..………………………………….………… IC block diagram………………………………………………………………………..…… Wiring diagram ……………………………………………………………………………. Troubleshooting guide ………………………………………………………………..…… Schematic diagram………………………………………………………………………… APPENDIX-A: Assembly list APPENDIX-B: Exploded View...

  • Page 3: Safety Precautions

    Attention: This service manual is only for service personnel to take reference with. Before servicing please read the following points carefully. Safety precautions 1. Instructions Be sure to switch off the power supply before replacing or welding any components or inserting/plugging in connection wire Anti static measures to be taken (throughout the entire production process!): a) Do not touch here and there by hand at will;...
  • Page 4 would be unable to work and no way to get it repaired. If the connection wires, connections or components fixed by the thermotropic glue need to disengage when service, please soak the thermotropic glue into the alcohol and then pull them out in case of dagmage.

  • Page 5: Alignment Instructions

    Alignment instructions 1. Test equipment PM5518 (video signal generator) VG-848 (VGA, HDMI signal generator) VG-849 (digital video signal generator) CA210 (color analyzer) 2. Power test Connect main board, power board and IR board according the wiring diagram, connect the power and press “standby”...
  • Page 6 Performance check Preset ex-factory Fig-1 adjustment flow-chart 4. Adjustment instruction 4.1 Unit adjustments Connect all the boards according to wiring diagram, then power on and observe the display. Method for entering factory menu: press “INPUT”, “2”, “5”, ”8” and “0” in turn to enter factory menu;...
  • Page 7 4.4 White balance adjustment 4.4.1 white balance adjustment of HDMI a. Input VG-849 signal from HDMI: TIMING854 (800* 600/60Hz) and eighth-level gray scale signal of PAT920. Use color analyzer CA210 to adjust white balance. b. Enter submenu of COLOR TEMP, Select 9300k of color temperature c.

  • Page 8: Method Of Software Upgrading

    6. Software instruction Table6 software instruction Code No. Type Function Flash written Method before paste NS14 5270008001 ATMEGA8L Power image Written with instrument like 5272540001 PM25VF040 Main CPU program ALL11 5272402002 24C02N-10SI27 HDMI EDID 5272402002 24C02N-10SI27 VGA EDID 5272404002 24C02N-10SI27 Store some important written information software...
  • Page 9 3) Press “Connect“ to connect TV, if the connection is done successfully as shown below, then press “enter”. Note: if it appears error, check the connection wires and check if ISP item of the factory menu is set to 1, if not, please set it to 1. 4) After connection is done, it needs to read the Binary document.
  • Page 10 Select 6) Select the document then the window will appear as shown below:...
  • Page 11 7) Press “Auto” to select the writing function.
  • Page 12 Select the items shown in the picture above: (a) Read File (b) Program (c) Exit ISP (d) Erase Device (e) File Area 8) Press “Run” to begin the writing program, wait till the blue bar is complete. After writing, it will display OK: If there is error appeared (shown as below), press “Run”...
  • Page 13 Note1: keep the connection well and don’t cut off the power during the writing process. Note2: the writing speed can be adjusted as shown below. Select “Config” then adjust Speed BAR, the value is bigger the speed is faster. But it is easier to appear error when increase the speed, so it need to select a suitable speed according the PC.

  • Page 14: Working Principle Analysis Of The Unit

    Working principle analysis of the unit The RF signal received by antenna will be sent to tuner TUNER1, then IF signal will be obtained through high amplifier and mixed frequency, through pre-intermediate amplified by V15, then it will be sent to acoustic surface-wave Z17 to do IF filter and get better IF characteristics, then it will be sent to N3 (TDA4470) to do intermediate amplification, phase-locked loop VCO and synchronous wave detection to get video signal TV-V;...

  • Page 15: Block Diagram

    Block diagram POWER MEG. EDID EDID ATMEG8L 24C02 24C02 HDMI FLASH YPbPr HDTV SW. EEPROM PI5V330 SCART1-RGB LCD TV CONTROLLER SCART1-V SCART1-L/R PANEL MST9E19B L/R-VGA L/R-YPbPr AUDIO AMP. TUNER PRE AMP TDA7266SA SPEAKER TV-SIF IF AMP TV-V TDA4470 2*AMP SCART1-V OUT PRE AMP TV-L/R SCART1-L/R OUT...

  • Page 16: Ic Block Diagram

    IC block diagram 1. MST9E19A The MST9E19A is a high performance and fully integrated IC for multi-function LDC monitor/TV with resolutions up to SXGA (1280X1024)/WXGA+(1440X900). It is configured with an integrated triple-ADC/PLL, an integrated DVI/HDCP/HDMI receiver, a multi-standard TV video and audio decoder, a video de-interlacer, a scaling engine, the MStarACE-3 color engine, an on-screen display controller, an 8-bit MCU, and a built-in output panel interface.
  • Page 17 2. TDA7266SA The TDA7266SA is a dual bridge amplifier.
  • Page 18 3. TDA4470 The TDA4470 is an integrated bipolar circuit for multi-standard video/sound IF(VIF/SIF) signal processing in TV/VCR and multimedia applications. The circuit processed all TV video IF signals with negative modulation (e.g., B/G standard), positive modulation (e.g., L standard) and the AM, FM/NICAM sound IF signals.

  • Page 20: Wiring Diagram

    Wiring diagram power board back light speaker key board IR board main board...
  • Page 21 Trouble shooting 1. Fault clearance Before servicing please check to find the possible causes of the troubles according to the table below. 1.1 Antenna (signal): Picture is out of focus or jumping Bad status in signal receiving Poor signal Check if there are failures with the electrical connector or the antenna.
  • Page 22 signal types. Picture too bright and there is Check if the contrast setting is too high. distortion in the brightest area Possibly the output quality of DVD broadcaster is set too high. It maybe also due to improper terminal connection of the video frequency signal in a certain position of the system.

  • Page 23: Troubleshooting Guide

    2. Troubleshooting guide 2.1. No raster Turn-on power supply, check if the red indicator is light in the STANDBY? Check if PIN3(5V) of XB1 on Press POWER button on the main board is normal? unit or sensor control and check the indicator. blue Check if the PIN9,10 of XB1 Check 5V-STANDBY circuit...
  • Page 24 2.2. Raster, but no picture Check if the unit button Does display remote control menu in screen when operation? press menu button? Check if all channels have no signal? VGA/SCART(CVBS)/HDMI Enter factory-menu, Which is no signal initialization EEPROM, of channels Replace then turn off the TV, Replace...
  • Page 25 2.3.no sound Check if PIN3, 13 voltage Check the wave of of NV1 is normal? PIN4,12 of NV1 Check NV1 and its periphery Check power supply Check PIN24 wave of Check NS2 and its periphery Check N3 and its Check PIN11 wave of periphery TUNER1 Check TUNER1 and its...

  • Page 26: Schematic Diagram

    main board...
  • Page 27 main board...
  • Page 28 main board...
  • Page 29 main board...
  • Page 30 main board...
  • Page 32 back light board...
  • Page 33 APPENDIX-A: Main assembly LCD-22XR7S MAIN COMPONENT AND IT'S NO. NAME TDA4470 （5274470001） MST9E19B （5270919002） Main board XI6HU050110 TDA7266SA （5267266001） Key board XI6HU0090510 IR board XI6HE0060910 Power board XI6HU0042010 Backlight board XI6LY01214B0 Remote control RC-Y35-0F XI6010Y03507 Panel CLAA220WA01 XI5203227201...

  • Page 34: Appendix-B: Exploded View

    APPENDIX-B: Exploded view (LCD-22XR7S)
  • Page 35 PART LIST OF EXPLODED VIEW (LCD-22XR7S) DESCRIPTION Front cabinet IR board Key board Panel Power board Back light board Back cabinet Stand Back cabinet baffle Digital processing board AV baffle board Speaker User manual Remote Control...
  • Page 36 PART LIST LCD-22XR7S ver. REF.No. PARTS No. DESCRIPION Q'TY REMARK Front cabinet XI5QK37W0020 IR board XI6HE0060910 XI6HU0090510 Key board XI5203227201 Panel CLAA220WA01 XI6HU0042010 Power board XI6LY01214B0 Backlight board XI5HK37WH030 Back cabinet XI6151084300 Stand XI5830110020 Back cabinet baffle XI6HA0066910 Digital processing board...

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