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ViewSonic VE902m Service Manual

19” color tft lcd display
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Service Manual

ViewSonic VE902m-1
Model No. VS10552
19" Color TFT LCD Display
(VE902m_SM_940 Rev. 1a Dec. 2004)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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  • Page 1: Service Manual

    Service Manual ViewSonic VE902m-1 Model No. VS10552 19” Color TFT LCD Display (VE902m_SM_940 Rev. 1a Dec. 2004) ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583...

  • Page 2: Revision History

    Further, ViewSonic reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or changes.

  • Page 3: Table Of Contents

    4. Circuit Description 5. Adjusting Procedure 6. Trouble Shooting Flow Chart 7. Recommended Spare Parts List 8. Exploded Diagram And Spare Parts List 9. Block Diagram 10. Schematic Diagrams 11. PCB Layout Diagrams Confidential - Do Not Copy ViewSonic Corporation VE902m...

  • Page 4: Precautions And Safety Notices

    Reflector edge softly. Otherwise the TFT Module may be damaged. (10) At the insertion or removal of the Signal Interface Connector, be sure not to rotate nor tilt the Interface Connector of the TFT Module. Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 5 (14) The LCD module is designed so that the CFL in it is supplied by Limited Current Circuit (IEC60950 or UL1950). Do not connect the CFL in Hazardous Voltage Circuit. Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 6 “ MURA “ Do not touch the surface of the polarize . Take out the monitor with cushion Take out the monitor by grasping the LCD panel. That may cause “ MURA“. Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 7 Correct Methods : Incorrect Methods : Place the monitor on a clean & soft foam pad . Place the monitor on foreign objects . That could scratch the surface of panel Confidential - Do Not Copy ViewSonic Corporation VE902m...

  • Page 8: Specification

    30 / -5 degree Physical Dimension, weight 417.95(W) x 431.85(H) x 232(D), 4.6 mm, kg Plug & Play DDC 2B Compliance 6keys Front key Function Speaker & Audio (Optional) 2.5W*2 & 1W*2 Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 9 1280 x 1024 @60HZ Color temperature With OSD setting Measuring instrument Minolta CS-1000T Spectrometer and Photometer CA-210 or equivalent Others Before measuring, “Auto Adjust” & “Auto Balance” must be done in advance Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 10 Quick start guide: Paper: 100% Recycle Paper User Manual CD-ROM: 10 languages (Arabic, English, French, German, Spanish, Italian, Traditional Chinese, Simplified Chinese, Russian, Korean) Seat to be set by user: SETP-3 SETP-1 SETP-2 Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 11 39 480 Macintosh 832x624 49.725 74.500 57.283 N N 1152 64 224 832 32 667 3 39 624 1024x768 60.150 74.720 80.000 N N 1330 96 168 1024 42 805 3 31 768 Confidential - Do Not Copy ViewSonic Corporation VE902m...

  • Page 12: Front Panel Function Control Description

    LCD monitor on. If the LED of the LCD monitor is an orange color after completing the steps above, please check your VGA card and computer system. Your monitor should be operating properly. Confidential - Do Not Copy ViewSonic Corporation VE902m...

  • Page 13: Osd Control

    Turbo Quick brightness switching Selection or adjustment when OSD is shown ┼/ Quick brightness adjustment ―/ Adjustment when OSD is shown Quick contrast adjustment Menu Enter OSD Access sub-menu & selection Speaker Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 14 Adjustments for clock, phase and positions are saved for each signal timing. Except for these adjustments, all other adjustments have only one setting which applies to all signal timings. The color will change from white to pink while the function is selected. Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 15 Changing to a lower brightness mode can lessen eye fatigue. Change from Picture Mode to Text Mode when working with text. Change from Text Mode to Economy Modes when viewing the screen for long periods. Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 16 1. Turn off [Power on/off] button. 2. Press [+] + [-] + [Power on/off] at same time 3. Press [Menu] Then you will see the BIOS update picture show in the screen as below. Confidential - Do Not Copy ViewSonic Corporation VE902m...

  • Page 17: Circuit Description

    The AT1741 is 2-channel PWM switching regulator controllers that contains an on-chip 2.5V reference, two error amplifier, an adjustable oscillator, two dead-time comparators, under voltage lockout circuitry and 2 common-emitter output. It is idea for step-up, step-down, and inverting converter. Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 18 After the device performs chip erase or block erase operation, it can be reprogrammed on a byte-by-byte basis. Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 19 28 bits of CMOS/TTL data with falling edge clock. At a transmit clock frequency of 85MHz, 24 bits of RGB data and 4 bits of LCD timing and control data (HSYNC, VSYNC, CNTL1, CNTL2) are transmitted at a rate of 595 Mbps per LVDS data channel. Confidential - Do Not Copy ViewSonic Corporation VE902m...

  • Page 20: Adjusting Procedure

    (Refer to Page 22, Checkered Pattern Every One Pixel (50%Green & 50%Blue) Inspection Item: Flicker, Mura 6. Window BG Test Signal: 1280*1024@60Hz Test Pattern: Window standard pattern Inspection Item: Line Defect, Function Defect & Mura Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 21 Inspection Item: Particle, Line Defect, Power, Image Remain & Mura 10. Black Box Test Signal: 1280*1024@60Hz Test Pattern: (Refer to Page 21, Figure 3) Window standard pattern Inspection Item: Bright Dot, Line Defect & Power Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 22 14. Gray_Scale_0 -100_V256 Test Signal: 1280*1024@60Hz Test Pattern: (Refer to Page 21, Figure 1) Vertical 64 (256) Gray Scale (Right ¡÷ Left¡AFrom 0 to 100% White) Inspection Item: Line Defect & Function Defect Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 23 Inspection Item: Cross Talk & Optical Character 17. Black_Tile Test Signal: 1280*1024@60Hz Test Pattern: (Refer to Page 22, Figure 8 ) Black tile under white background Inspection Item: Function Defect & Image Remain Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 24 Full Screen 50% Green Figure 5 Blue Full Screen 50% Blue Figure6 White Full Screen White Figure7 Black_Tile Black Tile Under White Background Figure 8 Figure 1 Figure 2 Figure 3 Figure 4 Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 25 Figure 5 Figure 5 Figure 6 Figure 7 Figure 8 Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 26 B. BIOS update procedure BIOS Update User Guide For ViewSonic BIOS Update Flow for Genesis 1. P rogram¡G Hardware Installation •RS232 cable¡] 9 Pin¡^ •D_Sub cable¡] 15Pin¡^ •12V Power supply Monitor Set •RS232 to D_Sub transfer BD PC optional RS232 to PC 1.2 Join R232, monitor cable, and adapter.
  • Page 27 This system is applied to Win 95/98/NT/2000 ISP.GProbe 1.5 ISP Execution ISP exe. Main program Gprobe.exe Drive write file. Pre.txt Drive read file. Readme.txt : Ancillary file. 5126bc14.dev Please copy all the files above to the same directory Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 28 1.6. Open ISP.Gprobe while parameters set up have been completed. ISP.GProbe 1.7. You will see the picture as below. Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 29 1.8. Execute the main program ( Grope ). Choose the item for parameter link while program execution 1.9 Please follow up the parameter set up shown as below ¡G SERIAL1 COM1 115200 Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 30 1.10 Select “gm5126AA_AB ” Select “ gm5126AA_AB” Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 31 Input BATCH PRE.TXT ¡G Input “ BATCH The system can PRE.TXT” execute ISP while the words show up If appear line 3 is OK, Appear line 2 is Error. Please check wiring. Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 32 ¡° If failed, Please don’t turn off power. Repeat do it again, from step 6 to step 7. 1.13 When everything is done. Please turn off the power and rest art it again. Check Factory Mode and make sure it already be updated. Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 33 1. Separate Stand Assy Remove Stand Cover Step 1 : Take out Sand Assy Step 2 : Remove 2 Cover Hinges Step 4: Remove Stand Assy Step 3 : Loose and Remove 6 screws Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 34 Separate Bezel hooks to take Bezel and Rear Cover apart Step 2 : Separate Bezel hooks to take Step 1 : Loose and remove 5 screws . Bezel and Rear Cover apart. Step 3 : Remove Rear Cover Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 35 3. Remove Power Board 1. Remove the Tinfoil 2. Remove FFC Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 36 4. Remove Metal Cover Step 1 : Loose and remove 2 screws Step 2 : Loose and remove 6 screws Step 3 : Remove the Cover of X-PCB Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 37 5. Remove Power PCBA Step 1 : Loose and remove 3 screws Step 2 : Remove Power PCBA Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 38 6. Change New Power Board Step 1 : Insert New Power PCBA Step 2 : Fasten 3 fixed screws of Power PCBA Confidential - Do Not Copy ViewSonic Corporation VE902m...

  • Page 39: Remove Ffc

    7. Remove AD PCBA Remove FFC Step 1 : Remove 2 FFC from AD PCBA Remove AD PCBA Step 1 : Loose and remove 1 screw Step 2 : Remove AD PCBA Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 40 8. Change New AD PCBA Step 1 : Place New AD PCBA Step 2 : Insert 2 FFC Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 41 Step 2 : Fasten the 6 screws Step 1 : Join the cover hooks of X-PCB Step 3 : Fasten 2 screws Step 4 : Insert FFC Step 5 : Attach the Tinfoil Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 42 Step 2 : Separate both Audio Cable Step 1 : Remove FFC Step 3 : Loose and remove 2 screws Step 4 : Take OSD PCBA apart Completed Step 5 : Completed Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 43 12. Change New OSD PCBA Step 1 : Place New OSD PCBA Step 2 : Fasten 2 screws Step 3 : Insert Audit Cable to connectors of OSD PCBA Confidential - Do Not Copy ViewSonic Corporation VE902m...

  • Page 44: Trouble Shooting Flow Chart

    AD/B Change Check PCB No display P/B Change CNT/B Change Check Panel Panel Change D-sub cable Check Wire change AD/B Change Check PCB Noise Panel Change Check Panel TEST Next Step Completed Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 45 Panel Change Check Panel AD/B Change No signal Check PCB CNT/B Change Check Wire D-sub cable change Power on AD/B Change Check PCB Display Panel Change abnormal Check Panel TEST Next Step Completed Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 46 LED Abnormal OSD cable Change LED Flicker Check Wire Power wire connector Cable change Abnormal AD/B Change Keyboard Check PCB Unavailable P/B Change OSD cable Change Check Wire TEST Next Step Completed Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 47 Display Shut Check PCB Display Down P/B Change CNT/B Change Check Panel Panel Change AD/B Change Check PCB Display flicker (tapping ) CNT/B Change Check Panel P/B Change TEST Next Step Completed Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 48 Use OSD Color Menu to adjust color setting. Dark area distorted Use OSD Color Menu to adjust color setting. White color is not white Use OSD Color Menu to adjust color setting. Confidential - Do Not Copy ViewSonic Corporation VE902m...

  • Page 49: Recommended Spare Parts List

    7. Recommended Spare Parts List RECOMMENDED SPARE PARTS LIST (VE902m-1) ViewSonic Model Number: VS10552 Rev: 1a Item Description ViewSonic P/N Reference P/N Q'ty Accessories: Adaptor(AC/DC),65W,19V,3.42A,UP06511190-02B,POTRANS(black) A-00000570 2719065193 Power Code,CEE,H05W-F,0.75mm2,3C,LP-33+LS-60,L=1830+/-50mm,Black,Linetek,18AWG,No Bag A-00000571 32E1818016 Power Cord,UL,SP-305+IS-14,SVT,18AWGX3C,75 degreeCT-12,L=1800+/-50mm,I- A-00000572 32E1818019 SHENG,18AWG,18AWG,Black,No Bag PC Board Assembly: DC/AC Inverter,TWS-444-983,2900V/4.8mA,Sumida...
  • Page 50 BOM LIST (VE902m-1) ViewSonic Model Number: VS10552 Rev: 1a Item ViewSonic P/N PartNo Description Location Q'ty #N/A MJ0E301K01 19" common BOM,19E3 cell,COF,normal A/C grade E-00000588 L3J003XXXX LCD Panel , For 19.0" LCM, SXGA #N/A 36X8607401 COG,Scan,Himax:HX8607APD400,256/263Ch #N/A 7344191016 COG ACF,AC-8405Z-23,1.5mm,50M/RL SACF 0.00636...
  • Page 51 Item ViewSonic P/N PartNo Description Location Q'ty #N/A 01056F1051 Chip Resistor,SMD,+-5%,0603,1/16W,1M OHM RP45,RP43 #N/A 01056F2221 Chip Resistor,SMD,+-5%,0603,1/16W,2.2K OHM R101,R102 #N/A 01056F2721 Chip Resistor,SMD,+-5%,0603,1/16W,2.7K OHM R114,R113 #N/A 01056F2031 Chip Resistor,SMD,+-5%,0603,1/16W,20K OHM R6,R7,R9,R10,R11,R12,R15,R16 #N/A 01056F3921 Chip Resistor,SMD,+-5%,0603,1/16W,3.9K OHM RP33,R48 #N/A 01056F3331 Chip Resistor,SMD,+-5%,0603,1/16W,33K OHM...
  • Page 52 Connector,B-F,15Pin,E&T,7151-15 #N/A 2502532021 CONNECTOR,W-B,A150X2,MOLEX,53261-0290,2Pin CN3,CN2 #N/A 2704020004 Switch,Forward,SFKHHMW,4Pin,12V,DC 5mA SW1,SW2,SW3,SW4,SW5,SW6 Software(EDID),A190E2,Ver.VSC491BA00,ViewSonic,Analog #N/A 10E1900013 Port,Taiwan,CheckSum(E6) Software(BIOS),A190E2,RSDS,Ver.19E2TG0000,CMC,Analog+ #N/A 10B1900008 Audio,CheckSum:ISP(A09B),HiLo(3089) #N/A 40A1929928 BEZEL ASSY,A190E2-H03,Analog,For ViewSonic (Silver) #N/A 7341311044 Protector Film-Panel,PET,M190E2 #N/A 7741519181 Label,Bar-Code Labe,55*13mm Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 53 Item ViewSonic P/N PartNo Description Location Q'ty DC-00000584 77419191A3 Label,Bar-Code Label,50*25,A190E2-H03,VSC DC-00000587 77419191A2 Label,Safety Label, 89*49,A190E2-H03,VSC C-00000581 40A1999207 SEAT ASSY,A190E2-H03,877C(Silver)/black SEAT #N/A 7841949914 PE FOAM(Top),EPE,456*146*50mm A190E2-H03 #N/A 7841949915 PE FOAM(Bottom),EPE, 456*146*50mm,A190E2-H03 #N/A 7641900321 Menu(Quick Start Guide), A190E2-H03,VSC QUICK-G #N/A 7841919921 PE Foam Bag,Protector,570*600*0.13,A190E1-H01,white...

  • Page 54: Exploded Diagram And Spare Parts List

    8. Exploded Diagram And Spare Parts List Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 55 EXPLODED PARTS LIST (VE902m-1) ViewSonic Model Number: VS10552 Rev: 1a Description Item ViewSonic P/N Reference P/N BEZEL ASSY,A190E2-H03,Analog,For ViewSonic (Silver) 40A1929928 C-00000580 41A1969107 Metal Frame_Front Assy,A190E2 M-00000591 L3J003XXXX LCD Panel , For 19.0" LCM, SXGA E-00000588 44A1913004 Backlight Unit,Direct Type,W/ West Lamp,A190E2...
  • Page 56 Packing for shipping PACKING PARTS LIST (VE902m-1) ViewSonic Model Number: VS10552 Rev: 1a Description Item ViewSonic P/N Reference P/N L3J003XXXX LCD Panel , For 19.0" LCM, SXGA E-00000598 7841919921 PE Foam Bag,Protector,570*600*0.13,A190E1-H01,white P-00000595 7841949915 PE FOAM(Bottom),EPE, 456*146*50mm,A190E2-H03 P-00000596 7841925230 Carton,475*188*470, A190E2-H03,VSC...

  • Page 57: Block Diagram

    9. Block Diagram OSD Key Pad Speaker Audio Out Audio In 3.3V Main Board LCD Module D-sub Signal Analog Video DC/DC DC-19V Inverter DC -19V Backlight Confidential - Do Not Copy ViewSonic Corporation VE902m...

  • Page 58: Schematic Diagrams

    GMA1 ESTH ESTH GMA1 GRAPHIC INPUT PANEL INV_ON/OFF INV_ADJ DC/DC POWER INV_ON/OFF INV_ADJ GMA1 GMA2 VIN_19V VIN_19V VIN_19V GMA3 GMA4 GMA5 INVERTER I/F DC/DC POWER GMA6 GMA7 GMA8 GMA9 GMA10 INVERTER I/F Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 59 VOL_MUTE UDZ-12B UDZ-12B SHUTDOWN AUDIO_ON 2N7002 2N7002 AUDIO_ON 2N7002 2N7002 R151 R151 3.3V 0603/10K 0603/10K SHUTDOWN : Nomally Low VOL_MUTE: MCU CONTROL Add new circuit to reduce DC plug out pop noise Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 60 PANEL_ONB 2N7002 2N7002 IC_VREF ZDP6 ZDP6 RP42 RP42 RP43 RP43 BZT52-C5V1S BZT52-C5V1S 0603/10K/1% 0603/10K/1% 0603/1M 0603/1M QP18 QP18 RP44 RP44 PANEL_ON/OFF 2N7002 2N7002 0603/10K/1% 0603/10K/1% (High --> Enable) RP45 RP45 0603/1M 0603/1M Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 61 CLK_SHLD RXC+ CLK+ CLK- RXC- OPEN OPEN BZT52-C5V6S BZT52-C5V6S OPEN OPEN BZT52-C5V6S BZT52-C5V6S BAV99W BAV99W BAV99W BAV99W BAV99W BAV99W BAV99W BAV99W BAV99W BAV99W BAV99W BAV99W BAV99W BAV99W BAV99W BAV99W SHELL2 2DS-0342-S01 2DS-0342-S01 Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 62 DDC_SCL DDC_SCL DDC_SDA DDC_SDA OPEN OPEN INV_ADJ INV_ADJ V33C INV_ON/OFF INV_ON/OFF V33C V33C G_HSYNC 0603/0.1U/25V 0603/0.1U/25V HSYNC HSYNC VIN_19V G_VSYNC VIN_19V VSYNC VSYNC SN74LV14APWR SN74LV14APWR 3273-008-10 3273-008-10 [Schmitt Trigger] GND_INV INVERTER I/F Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 63 AUDIO/L+ AUDIO/L+ AUDIO/L- AUDIO/L- 4L121 4L121 TP0610T TP0610T CP33 CP33 CP34 CP34 ET7101-15 ET7101-15 LED_GI 2N7002 2N7002 4C/100N 4C/100N 4C/100N 4C/100N LED_GI 0603/249R/1% 0603/249R/1% TP0610T TP0610T LED_OI LED_OI 2N7002 2N7002 0603/249R/1% 0603/249R/1% Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 64 GMA9 GMA9 GMA10 GMA10 OG0N OG0N OG0P OG0P OG1N OG1N OG1P OG1P OG2N OG2N OG2P OG2P OR0N OR0N OR0P OR0P OR1N OR1N OR1P OR1P OR2N OR2N OR2P OR2P OSTH OSTH FH12-45S-0.5SH FH12-45S-0.5SH Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 65 R100 R101 R101 0603/4.7K 0603/4.7K 0603/0.1U/25V 0603/0.1U/25V 1206/10U/16V 1206/10U/16V 0603/820R 0603/820R 0603/820R 0603/820R U10A U10A 0603/2.2K 0603/2.2K VSCM VSCM_ADJ R102 R102 LM358AM LM358AM 0603/2.2K 0603/2.2K 1206/10u/16V 1206/10u/16V 27KHz VCM_PWM 2N7002 2N7002 VCM_PWM Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 66 OPEN OPEN RMDATA0 ROM_DATA0 CLKOUT 32-Pin PLCC Socket FLASH_OEn ROM_OEn Default Jumper settings are shown above R147 R147 Solid/White = 10K IN/OUT 0603/10K 0603/10K C125 C125 C126 C126 0603/0.1U/25V 0603/0.1U/25V 0603/0.1U/25V 0603/0.1U/25V Confidential - Do Not Copy ViewSonic Corporation VE902m...

  • Page 67: Pcb Layout Diagrams

    11. PCB Layout Diagrams Main board Confidential - Do Not Copy ViewSonic Corporation VE902m...
  • Page 68 We would appreciate your completion of the Assessment Matrix below, for return to ViewSonic Corporation Assessment A.What do you think about the content after reading VE902m Service Manual? t i n e l l Precautions And Safety Notices 2.

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