Lenovo L2021 Wide Service Manual
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Lenovo L2021 Wide Service Manual

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Lenovo Service Manual
L2021W
联 想 显 示 器 维 修 手 册
Brand:
Lenovo
Model:
L2021 Wide
L2021WA
1

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Summary of Contents for Lenovo L2021 Wide

  • Page 1 Lenovo Service Manual L2021W 联 想 显 示 器 维 修 手 册 Brand: Lenovo Model: L2021 Wide L2021WA...

  • Page 2: Revision List

    Lenovo Service Manual L2021W REVISION LIST Release Revision Editors Version Model TPV Model No Date History Redactor May-15-2010 Initial Release L2021W TAASRJEYXAG1HNJ TPV-BJ-Rain TAASRJEYXAG1HNJ L2021W Aug-30-2011 Update Part 9 TPV-BJ-Rain TAAMRJEYXAG1HNJ L2021WA TAASRJEYXAG1H2J...

  • Page 3: Table Of Contents

    Lenovo Service Manual L2021W CONTENTS 1. LCD Specifications ....................4   1.1 Product Features ..........................4   1.2 Factory preset modes ........................5   2.Operation instruction ....................6   2.1 Control Buttons ..........................6   2.2 OSD User mode adjustment ......................7  ...

  • Page 4: Lcd Specifications

    Lenovo Service Manual L2021W 1. LCD Specifications 1.1 Product Features Model Lenovo L2021Wide / L2021WA Driving system TFT Color LCD LCD Panel Active Display Area 442.8 (W)×249.07(H)mm 508.0mm(20.0”) Pixel Pitch 0.2768 mm×0.2768mm Max. Resolution 1600 x 900@75Hz Display Colors 16.7M Colors R,G,B Analog Interface，75ohm,0.7V...

  • Page 5: Factory Preset Modes

    Lenovo Service Manual L2021W 1.2 Factory preset modes Display modes Refresh rate 640×350 70Hz 640×480 60Hz,72Hz,75Hz 720×400 70Hz 800×600 56Hz, 60Hz, 72Hz,75Hz 832×624 75Hz 1024×768 60Hz, 70Hz,75Hz 1152×864 75Hz 1280×768 60Hz 1280×1024 60Hz, 70Hz,75Hz 1366×768 60Hz 1440×900 60Hz, 75Hz 1600×900...

  • Page 6: Operation Instruction

    Lenovo Service Manual L2021W 2.Operation instruction 2.1 Basic connection The power cord should be connected.  Connect the video cable from the video card of the PC to the monitor.  Press the power button to turn on the monitor, the power indicator will light up.

  • Page 7: Osd User Mode Adjustment

    Lenovo Service Manual L2021W Icon Control Description Input select Switches the video input source.DVI/D-SUB DDC-CI Pressed till 10 seconds, will enable/disable the DDC/CI. Exit Exit current OSD return to last level. Auto Press，Automatically adjust the image OSD, it will decrease current value of bar, or move to last Decrease - adjusting item of menu.
  • Page 8 Lenovo Service Manual L2021W...
  • Page 9 Lenovo Service Manual L2021W...
  • Page 10 Lenovo Service Manual L2021W...

  • Page 11: Interface Description

    Lenovo Service Manual L2021W 3.Interface description 3.1 VGA Interface description Pin No. Description Pin No. Description Red Input +5VDC Green Input Blue Input SDA- DDC-Serial Data Connection detect H Sync Red GND V Sync Green GND SCL- DDC-Serial Clock Blue GND VGA Connector layout 3.2 DVI Interface description...

  • Page 12: Panel Feature

    Lenovo Service Manual L2021W 4. Panel Feature The Panel is a LTM200LT03-20.0 inch wide color TFT-LCD module . this module supports 1600×900 mode and displays up to 16.7 millions colors.This model is composed of a TFT LCD panel,a driver circuit and a back light unit （2CCFLs）.

  • Page 13: Electrical Characteristics

    Lenovo Service Manual L2021W 4.3 Electrical Characteristics a) TFT LCD module b) Backlight unit...

  • Page 14: Panel Block Diagroam

    Lenovo Service Manual L2021W 4.4 Panel Block Diagroam 4.5 LVDS Connector pin Assignment...

  • Page 15: Block Diagram

    Lenovo Service Manual L2021W 5.Block Diagram 5.1 LCD Block Diagram LCD Block Diagram 2-CCFL backlight Panel LVDS DC-AC inverter Main Board AC-DC (5V/12V) Power Board Computer VGA Key board Computer DVI AC supply 90V-264V Input signal 5.2 MainBoard Block Diagram...

  • Page 16: Power/ Inverter Board Block Diagram

    Lenovo Service Manual L2021W 5.3 Power/ Inverter Board Block Diagram Fuse Smoothing Rectifier Transformer Capacitor T901 Rectifier C907 AC input 100-240V Rectifier IC-PWM IC901 Q901 Rectifier Sense resistor Power part regulating PhotoCoupler Sampling Switching MOS DC-AC Resonance NET 12V DC...

  • Page 17: Software Flow Chart

    Lenovo Service Manual L2021W 5.4 Software Flow Chart Start Software Flow Chart Initial_MCU To Write default values Check if DataBuffer Is blank Check if Sum is changed ? Brightness Contrast Read parameter_from Buffer Language InputType InputTimingStableCounter OsdCounter Init_GlobalVariables PowerDownCounter Initial_MCU Device...

  • Page 18: Circuit Schematic

    Lenovo Service Manual L2021W 6. Circuit Schematic 6.1 Main Board---715G3327-1 input part---VGA/DVI/DDC DSUB_V H_Sy nc R301 100R 1/16W RTD_H V_Sy nc R303 100R 1/16W RTD_V R304 R305 C302 C303 2K2 1/16W FB302 C304 2K2 1/16W 33pF 33pF R306 100R 1/16W...
  • Page 19 Lenovo Service Manual L2021W CN201 CMVCC CMVCC MVCC FB202 CMVCC BKLT-VBRI DIM# BKLT-EN NC/120OHM C_PANEL_INDEX CMVCC PANEL_ID# Volume# FB201 VCC3 Volume# U201 Mute Mute VOUT 120Ω CONN C202 C204 AP1117E33LA C205 C203 0.1uF/16V 0.1uF/16V '07-01-10 change to Elite '07-01-10 change to Elite Back light Dimming(0.5V~3V)
  • Page 20 Lenovo Service Manual L2021W '06-11-24 D402 change Value from BAT54 to BAV70 150 OHM DVI_5V DSUB_5V FB401 2007-02-06 add for EMI CMVCC D402 BAV70 D401 D401 is Reserve for powerBoard CMVCC=3V CMVCC MCU_VCC_S MCU_VCC D403 MCU_VCC_S Q401 '06-11-24 LL4148 C402...
  • Page 21 Lenovo Service Manual L2021W Scarlar---RTD2525LH-/1.8V 1.8AVCC R1.8DVCC 150 OHM '07-02-15 add for EMI FB501 Q501 VCC3 KN2907AS R1.8DVCC1 Q502 C507 R507 3.3Ω 2W FB503 C506 C501 KN2907AS 120Ω C505 1uF/10V 0.1uF/16V 1uF/10V C502 22UF50V 0.1uF/16V '07-02-15 add for EMI DGND...
  • Page 22 Lenovo Service Manual L2021W Output---LVDS/Panel_Vcc LVDS Panel ( FFC Type ) LVDS_O[0..9] CN601 CN602 LVDS_O0 RXO0- LVDS_O1 RXO0+ RXO0- LVDS_O2 RXO1- LVDS_O0 RXO0- LVDS_O1 RXO0+ RXO0+ LVDS_O3 RXO1+ LVDS_O2 RXO1- LVDS_O3 RXO1+ RXO1- LVDS_O4 RXO2- LVDS_O4 RXO2- LVDS_O5 RXO2+ RXO1+...

  • Page 23: Power Board715G4174-2

    Lenovo Service Manual L2021W 6.2 Power Board 715G4174-2 ---adapter 5V/14.5V R918 100 OHM 1/4W 1000PF500V L904 C912 R919 +12V 1.0uH 100 OHM 1/4W ZD902 C930 RLZ13B R920 C922 R946 100 OHM 1/4W C918 470UF M 25V 150 OHM 2W 0.1uF...

  • Page 24: Inverter Part

    Lenovo Service Manual L2021W 6.3 Inverter part CN801 C839 T801 R821 POWER X'FMR 1500PF/50V R817 1K 1/8W D805 10K 1/10W 1% R855 CONN 15R 1/4W C819 C801 LL4148 F801 18pF/6KV 0.0022uF +12V 0 OHM 1/4W C802 R804 Q801 470UF/25V C824...

  • Page 25: Key Board715G3248/715G3249

    Lenovo Service Manual L2021W 6.4 Key Board715G3248/715G3249 CN003 R001 2 K 1/10W 1% LBADC1 R002 LBADC2 0K 1/10W 1% CONN R003 1K 1/10W 1% ZD006 ZD005 R004 2K 1/10W 1% SGND ZD010 ZD009 ZD008 ZD007 SGND SGND SGND SGND SGND...

  • Page 26: Explore Views

    Lenovo Service Manual L2021W 7.Explore Views...

  • Page 27: Pcb Layout

    Lenovo Service Manual L2021W 8. PCB Layout 8.1 MainBoard- 715G3327-1...
  • Page 28 Lenovo Service Manual L2021W...

  • Page 29: Powerboard 715G4174

    Lenovo Service Manual L2021W 8.2 PowerBoard 715G4174...
  • Page 30 Lenovo Service Manual L2021W...

  • Page 31: Keyboard

    Lenovo Service Manual L2021W 8.3 KeyBoard 715G4138-K01 715G4139-K01...

  • Page 32: Maintenance

    Lenovo Service Manual L2021W 9. Maintenance 9.1 Maintainability Requirement Voltmeter. & digital multimeter Oscilloscope. Pattern Generator. DDC Tool with Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual. repair tools etc 9.2 Disassembly SOP 1. Precaution Please read the precautions as follows to prevent any damages to the LCD Monitor Make sure all power connection is removed.
  • Page 33 Lenovo Service Manual L2021W 2 appropriate tools select the appropriate tools for disassembly and re-assembly. Phillips screwdriver spacer screwdriver C/D Disassembly Tool Gloves or soft cloth...
  • Page 34 Lenovo Service Manual L2021W 3 Disassembly SOP Remove the stand assy Starting from the back of the monitor,Lift the small back cover After pull up the small back cover, 向外提起 Pull up Separated Removed screws×3 the stand assy 2.Remove the Back cover,with Gloves or soft cloth...
  • Page 35 Lenovo Service Manual L2021W Remove the Lamp connector Remove screws×4 3. Remove the boards...
  • Page 36 Lenovo Service Manual L2021W...

  • Page 37: Trouble Shooting

    Lenovo Service Manual L2021W 9.3 Trouble Shooting Main Board--- No Power No power Check flow chart For the no power Press power key and look if the picture is normal Please reinsert and make sure the AC 100-240V is normal ? Reinsert or check the power section Check 5V-CN201, 3.3V-U201-2;...
  • Page 38 Lenovo Service Manual L2021W No picture (LED orange) Check flow chart No picture for the no signal Check signal wire Replace signal wire Check RGB/HV singal Check singal input 75Ω Check U103~U107 Check U201 Vout=3.3V; Q501-out=1.8V replaceU201,Q401,Q501,Q502 &around device check X401 waveform...
  • Page 39 Lenovo Service Manual L2021W White screen Check flow chart White screen For the white screen Measure Q602-base Check X401 waveform is low level? Replace X401 Check Q601=5V Check U401/U501 Or CN301 solder? Check around Check around device device Check connector...
  • Page 40 Lenovo Service Manual L2021W Power Board--- No Power 5V/12V Check CN901 Check flow chart 100-240V？ For the no power Check AC supply Check rectified voltage-C907 Check FuseF901/ BD901 L902/BD901/C901/C902 Check voltage of IC901-3pin check component R904/R932 Check T901(1-3)out-Vcc Check D901/R909/C908...
  • Page 41 Lenovo Service Manual L2021W No Backlight of panel Check flow chart for the Check voltage of F801-12V？ Inverter No Backlight Open F801, voltage-12V Return check Power Check ON/OFFsignal After Power off,check Check main board C801/C802？Q824? Check IC801 -12pin=12V pinRT waveform?

  • Page 42: Software Update Step

    Lenovo Service Manual L2021W Key Board--- OSD no working Check flow chart OSD is unstable or not For the key board working Connect Key Pad Board Is Key Pad Board connecting normally? Is Button Switch normally? Replace Button Switch Is Key Pad Board normally?
  • Page 43 Lenovo Service Manual L2021W Step2：Installing driver software 1.To install the USB driver software, mstar ISP Driver3-DB07-6-XP-driver 2. Installing Step3：Run software “RTD Tool V1.7 version”...
  • Page 44 Lenovo Service Manual L2021W 1.selected ISP,-RTD2122 ,as shown in, Press the icon to select,Note save HDCP key:...
  • Page 45 Lenovo Service Manual L2021W 2.selcted “Page Select” ,as shown in: 3.Click “64K”,selcted software files,as shown in (software files must be in a directory)
  • Page 46 Lenovo Service Manual L2021W In this way, Automatic Identification space size,Next ,selected “Externd True Size”...
  • Page 47 Lenovo Service Manual L2021W 4.Click ,Programming started,After Programming, Appear PASS.

  • Page 48: Writing Ddc Program Step

    Lenovo Service Manual L2021W 9.5 Writing DDC program step 1. Prepared the PC with Windows XP system, DDC recording device (12V)for figure below 2. Connect the DDC recording device and the PC through PC parallel port 3. setup “Port95nt” driver program to PC , 4.
  • Page 49 Lenovo Service Manual L2021W...
  • Page 50 Lenovo Service Manual L2021W...

  • Page 51: Factory Mode Adjustment

    Lenovo Service Manual L2021W 9.6 Factory mode adjustment After replacing the Main board and the Panel, Check for enter the Factory mode ,then re-writing DDC is necessary. Press MENU button and hold,reinsert the Power cord , then ,press MENU , the monitor will may enter Factory OSD Menu.
  • Page 52 Lenovo Service Manual L2021W In normal user mode, open the menu to restore factory default values...

  • Page 53: Bom List

    Lenovo Service Manual L2021W 10.BOM List Note: The parts information listed below are for reference only, and are subject to change without notice. Please go to http://cs.tpv.com.cn/hello1.asp for the latest information. 10.1 Model：TAASRJEYXAG1HNJ Location Part number Description Remark 040G 45760819A...
  • Page 54 Lenovo Service Manual L2021W X401 093G 22 45 YC Crystal 24MHz 30PF 49U/S CN602 311GW200C24ABL WAFER 2.0mm 2*12P AIGARJG1J1 MAIN BOARD FOR AI EC 105℃ 100uF M 16V 5*11mm C505 067G 3051013PB C405 067G 4051007PB EC 10uF M 50V 5*11mm...
  • Page 55 Lenovo Service Manual L2021W R434 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R433 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R422 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R317 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R315 061G0402101 RST CHIPR 100 OHM +-5% 1/16W...
  • Page 56 Lenovo Service Manual L2021W R431 061G0402682 RST CHIP 6K8 1/16W 5% R439 061G0402682 RST CHIP 6K8 1/16W 5% R307 061G0402750 RST CHIPR 75 OHM +-5% 1/16W R310 061G0402750 RST CHIPR 75 OHM +-5% 1/16W R314 061G0402750 RST CHIPR 75 OHM +-5% 1/16W...
  • Page 57 J45G 76 28IB3 pe bag for manual/card J45G 77 6 PE PACKING J45G 88902LX2 PP BAG J52G 1185 56 BIG TAPE FOR LENOVO J52G1001 16 2 AL FOIL(150*60MM) J52G1001 17 1 ALUMINIUM TAPE-120*40 J52G1801 1 1B INSULATING SHEET J52G1901 2 1B...
  • Page 58 Lenovo Service Manual L2021W SMTKEPCAQA8J KEY BOARD FOR SMT CN602 033G8032 3F S HR CONNECTOR CN601 033G8032 6F S WAFER 1.25mm 2nd source CN601 033G8032 6F S HR CONNECTOR C003 065G060310432K CAP CHIP 0603 100nF K 50V X7R C004 065G060310432K...
  • Page 59 Lenovo Service Manual L2021W C904 063G107K104 6 0.1UF +-10% 2nd source C904 063G107K104 U 0.1UF/275V C908 063G107K224 US MPX. 0.22UF 250V +_10% C908 063G107K2246S1 X2 CAP 0.22UF K 275VAC 2nd source C801 065G 6J1806ET 18PF 5% SL 6KV C902 065G305M1022BP...
  • Page 60 Lenovo Service Manual L2021W 051G 200 1 OIL FOR DISAPPEAR 2nd source D906 093G 60239 FME-210B T0-220 2nd source D906 093G 60522 diode MBR10150FCT PANJIT 0M1G 930 8120 SCREW Q90G6263 3 HEAT SINK PWA21L2SMTJ powe board for smt IC801 056G 379 22...
  • Page 61 Lenovo Service Manual L2021W R801 061G0603150 1F RST CHIPR 1.5 KOHM +-1% 1/10W R930 061G0603243 1F RST CHIPR 2.43K OHM +-1% 1/10W R940 061G0603330 2F RST CHIPR 33K OHM +-1% 1/10W R927 061G0603360 1F RST CHIPR 3.6K OHM +-1% 1/10W...
  • Page 62 Lenovo Service Manual L2021W R962 061G1206101 RST CHIPR 100 OHM +-5% 1/4W R935 061G1206101 RST CHIPR 100 OHM +-5% 1/4W R855 061G1206150 RST CHIPR 15 OHM +-5% 1/4W R856 061G1206150 RST CHIPR 15 OHM +-5% 1/4W R910 061G1206220 JF RST CHIPR 22 OHM +-5% 1/4W FENGHUA...
  • Page 63 Lenovo Service Manual L2021W D903 093G 6432P LL4148 D915 093G 6432P LL4148 D916 093G 6432P LL4148 D916 093G 6432V LL4148-GSO8 2nd source D915 093G 6432V LL4148-GSO8 2nd source D903 093G 6432V LL4148-GSO8 2nd source D817 093G 6432V LL4148-GSO8 2nd source...
  • Page 64 Q51G 6 4509 GLUE_RTV 变压器 ASS'Y T801 S80GL17T40V T901 S80GL19T26V1 Transformer ASS'Y Q12G6001 1 Rubber foot Q15G0822101 lenovo L2230 stand- BKT Q23G317860815A LOGO Q33G0426AKHA1S KEY BUTTOM 2nd source Q33G0427AKH 1S KEY PAD Q33G0428 2 1C LENS 2nd source cable manager/理线夹...

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