ViewSonic VG2021m-1 Manuel de service

ViewSonic VG2021m-1 Model No. VS11234 20” Color TFT LCD Display (VG2021m-1_SM Rev. 1a Apr. 2006) ViewSonic 381 Brea Canyon Road, Walnut, Californi

Panel Characteristics: 1st Source Panel A201P1 Type “TN Technology” Active Size 408.24 (H) x 306.18(V) Pixel Arrangement RGB Vertical Stripe P

ViewSonic Corporation 83. Front Panel Function Control Description Adjusting the Screen Image Use the buttons on the front control panel to display

ViewSonic Corporation 9Do the following to adjust the screen image: 1. To display the Main Menu, press button [1]. NOTE: All On View menus and adjust

ViewSonic Corporation 10Main Menu Controls Adjust the menu items shown below by using the up p and down q buttons. Control Explanation Auto Image Adju

ViewSonic Corporation 11Control Explanation Information displays the timing mode (video signal input) coming from the graphics card in the computer,

ViewSonic Corporation 12 Language Select allows the user to choose the language used in the menus and control screens. Resolution Notice allows the

ViewSonic Corporation 134. Circuit Description The TSUM57AK is total solution graphics processing IC for LCD monitors with panel resolutions up to SXG

ViewSonic Corporation 145. Adjustment Procedure A. Function Test and Alignment Procedure 1. All Modes Reset You should do “All Model Reset” (Refer to

ViewSonic Corporation 158. 50 Gray Test Signal: 1400*1050@60Hz Test Pattern: Full Screen 50% White (Gray) Inspection Item: Bright Dot, Particle, Li

ViewSonic Corporation 1614. Gray_Scale_0-100_V64 Test Signal: 1400*1050@60Hz Test Pattern: Vertical 64 (256) Gray Scale (Right → Left，From 0 to 10

ViewSonic Corporation i Copyright Copyright © 2006 by ViewSonic Corporation. All rights reserved. No part of this publication may be reproduced, tra

ViewSonic Corporation 17 Figure 5 Figure 6 Figure 7 Figure 8 VG2021m-1 Confidential - Do Not Copy

BIOS update procedure 1. To setup ISP environment Hardware: PC or Notebook , Parallel(Printer) cable , ISP tool( Fig 1) Software: ISP driver . If

2. Install ISP 2.1 User could download ISP driver and PORT95NT install file from Myson Century website (http://www.myson.com.tw ) 2.2 After extract

2.4 Keep default setting or press “Change” button for selecting the path that you want , and then press“Next”button to continue, see Fig 2.4. 2

2.6 The Installer Information shows package warning, press “Ignore” button to continue, see Fig 2.6. Fig 2.6 2.7 Installation has finished, press

3. ISP security code 3.1 After installation, we could find the shortcut in the setting path or the program bar (default setting), see Fig 3.1. Fig

3.3 The warning is used to remind user of that different CPU rate may cause ISP function fail(it is limited by IIC protocol), press “確定” button, see

3.5 At least 2 Command No of security code, see Fig 3.5, and different security code between hardware ISP and software ISP. The security code of soft

3.6 Fig 3.6 shows the setting for security code of hardware ISP, it needs 4 Command No, and key in command sequentially for 94, 94, AC, CA, 53. Fig

3.7 Fig 3.7 shows the setting for security code of software ISP, it needs 2 Command No, and key in command sequentially for 7C, 4C, 77. The Command N

ViewSonic Corporation ii TABLE OF CONTENTS 1. Precautions and Safety Notices 1 2. Specification 4 3. Front Panel Function Control Descriptio

4. Use ISP to program MCU 4.1 elect MTV type first, load the binary or Intel hex file that you want to program into the MCU, and select “Auto” item,

5 Use ISP to read MCU content 5.1 nly software ISP could read the MCU content, it is according to program the boot code while coding. The limitation

5.2 If user uses hardware ISP to read MCU content, it shows as Fig 5.2. Fig 5.2 ViewSonic Corporation 29VG2021m-1 Confidential - Do Not Copy

6 Re-entry the ISP Mode When you could not select or click ‘Reset MCU’ button and enter ISP mode again, you refer the message as below: Note:

7. Boot code of ISP 7.1 Hardware ISP (1) Without boot code (2) Fixed security code: 94, 94, AC, CA, 53 (3) Attention to the pin of HSCL (1) and HSDA

7.4 The followings show the relationship between the code and the security code. ViewSonic Corporation 32VG2021m-1 Confidential - Do Not Copy

8. ISP Adaptor Schematic 9. Adatptor Linking The Monitor Set Connect with Printer Cable 25Pins to 25Pins PC/HOST Connect with VGA Cable 1

ViewSonic Corporation 34Packing For Shipping And Disassembly Procedure Packing For Shipping 1. Packing Procedure 1.1 Paste protection film to prote

ViewSonic Corporation 35D. Monitor Assembly and Disassembly 1. Separate Stand Assy 1.1 Remove Stand Cover Step 2 :

ViewSonic Corporation 362. Separate Rear Cover (Rear Case Assy) Separate Bezel hooks to take Bezel and Rear Cover apart.

ViewSonic Corporation 1 1. Precautions and Safety Notices 1. Appropriate Operation (1) Turn off the product before cleaning. (2) Use only a dry

ViewSonic Corporation 373. Remove Power Board and AD Board 3.1 Remove Metal Cover Step 1 : Remove FFC from OSD Board

ViewSonic Corporation 38 Step 5 : Loose and remove 4 screws. Step 7 : Loose and remove 2 screws. Step 8 : Loose and

ViewSonic Corporation 39 3.2 Remove Power Board and AD Board Step 9 : Loose and remove 2 screws. Step 10 : Remove th

ViewSonic Corporation 40 Step7 : Completed. Step 4 : Remove 2 pieces of FFCs. Step 3 : Remove the FFC. Step 5

ViewSonic Corporation 414. Change New AD Board and Power Board Step 1 : Place new AD Board. And fasten 4 fixed

ViewSonic Corporation 42 5. Remove OSD Board Step 6 : Fasten 4 fixed screws. Step 7 :Completed. Step 3 : Loose and remove 2 sc

ViewSonic Corporation 43 6.Change New OSD Board Step 5: Completed. Step 1 : Place new OSD Board and insert FFC. Step 4 : Insert Audio

ViewSonic Corporation 447. Add Cover to AD PCB Heatsink Step 1 : Join the PCB Cover. Step 3 : Fasten 2 fixed screws. Step 2 : Fasten

ViewSonic Corporation 45 Step 11 : Completed. Step 10 : Insert FFC. Step 6 : Fasten 4 fixed screws Step 8 : Insert 2 pieces of Back

ViewSonic Corporation 46 8. Rear Assy & Stand Assembly Step 1 : Place Rear Cover. Step 2 : Fasten 4 fixed screws. Step 4 : Join

ViewSonic Corporation 2 (9) In the event that a Module must be put back into the packing container slot after it was taken out of the container, do n

ViewSonic Corporation 476. Troubleshooting Flow Chart Defect Mode Failure Analysis Repair Testing Flash Dots

ViewSonic Corporation 48 Defect Mode Failure Analysis Repair Testing Check PCBA Power on Display Abnormal

ViewSonic Corporation 49 Failure Analysis Repair Testing Gray Scale Display Abnormal R.G.B Display Abnor

ViewSonic Corporation 50 Defect Mode Failure Analysis Repair Testing Horizontal Line Defect Vertical Weak Lin

ViewSonic Corporation 51Defect Mode Failure Analysis Repair Testing LED Off No Power LED Dark LED Abnormal LED

ViewSonic Corporation 52Defect Mode Failure Analysis Repair Testing Abnormal BIOS &OSD Check PCB Check Wire AD/B

ViewSonic Corporation 53Defect Mode Failure Analysis Repair Testing Display Shut Down Check PCBA Check Panel

ViewSonic Corporation 54Trouble Shooting Analysis Check the information in this section to see if the problems can be solved before requesting repair.

ViewSonic Corporation 557. Recommended Spare Parts List Rev: 1aSerial No. Prefix: Q6UItem ECR/ECN ViewSonic P/N Ref. P/N Location Universal number# Q

ViewSonic Model Number: VS11234Rev: 1aSerial No. Prefix: Q6UItem ViewSonic P/N Ref. P/N Description LocationUniversalnumber#Q'ty1 N/A MK1P101K01

ViewSonic Corporation 3 Correct methods : Incorrect Methods : Only touch the metal-frame of the panel or the front cover of the monitor. Do not touc

ViewSonic Corporation 578. Exploded Diagram and Exploded Parts List VG2021m-1 Confidential - Do Not Copy

ViewSonic Model Number: VS11234Rev: 1aSerial No. Prefix: Q6UItem ViewSonic P/N Ref. P/N Description Q'ty1 C-00005683 40-D007460 BEZEL ASSY 12 N/A

ViewSonic Corporation 59Rev: 1aItem ViewSonic P/N Ref. P/N Location Q'ty1 N/A VG2021m-1 LCD Monitior 12 P-00002374 7841919941 PE Foam Bag 13 P-00

ViewSonic Corporation 609. Block Diagram OSD Key Pad / Audio Out D-sub Analog Video Speaker AC Power LDO Main Board LIPS Backlight LCD Module D

V18CRIGHTCLK+AUTOCLK-PANEL_ON/OFFV33CINV_ON/OFFV5A_ESDINV_ON/OFFBSTHSTBPOLCPVSTVOEGVOFFBG2NBG2PBG1NBG1PBG0NBG0PBB2NBB2PBB1NBB1PBB0NBB0PFR2NFR2PBR2NFR1

ModelTitleDate Rev:ViewSonic CorporationFB0NFB0PFB1NFB1PFB2NFB2PFG0NFG0PFG1NFG1PFG2NFG2PFR0NFR0PFR1NFR1PFR2NFR2PBB0NBB0PBB1NBB1PBB2NBB2PBG0NBG0PBG1NBG

ModelTitleDate Rev:ViewSonic CorporationV5AVIN_12VINV_ADJINV_ON/OFFVOLVOLMUTEMUTEAUD_DETMUTEAUD_ShutdownAUD_ShutdownINV_ADJINV_ON/OFFV33CV5AV12AVOL_AD

V33PV33CV33CV5AV33PV5ADVI_5VVGA_5VVCTRLV18CVrefGNDGNDV18CGND(SCALER VCC)(POWER FOR SCALER)(Panel VCC)Heat-Sink C530603/100n/25V/7/RoHSC530603/100n/25V

ModelTitleDate Rev:ViewSonic CorporationVSIHSYNCVSYNCVGA_5VVGA_5VHSIRINGINBINVSYNCGNDRGNDGGNDBDDCA_CLKHSYNCDDCA_DATV5A_ESDV5ADDCA_DATDDCA_CLKSOGVGA_5V

V5A_ESDDDCD_DATDDCD_CLKDVI_5VDDCD_CLKDDCD_DATG+R+B-R-B+G-CLK+V5AV5A_ESDCLK-DDCD_CLKDDCD_DATDVI_5VV5AV5A V5A_ESDGNDGNDGNDGNDGNDC310603/100n/25V/7C31060

ViewSonic Corporation 4 2. Specification INTRODUCTION FEATURES VG2021M-1 Size 20.1 “ Luminance (Typ) 300 cd/㎡ Contrast Ratio (Typ) 500:1 Colors

LED_OLED_GLED_OLED_GLED_ORRIGHTTURBOAUTOMENULEFTPOWERLED_GLAUDIOL-AUDIOL+AUDIOR-AUDIOR+V33CV33CV33C V33CV33CGNDGNDGND GNDGNDGNDV33CBead Array LP8,LP9,

VCCOESTVCPVSTBPOLPANEL_ON/OFFDCDC_ON/OFFVCM_PWMGVOFFFSTHBSTHS Board X Board RA N/P --> BA P/NGA N/P --> GA P/NBA N/P --> RA P/N1

ViewSonic Corporation 69 11. PCB Layout Diagrams VG2021m-1 Confidential - Do Not Copy

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VIDEO INTERFACE Input Connector(refer the appendix A) Analog : D-sub 15 , Digital: DVI-D Default Input Connector Defaults to the first detected i

ELECTRICAL REQUIREMENT Horizontal / Vertical Frequency Horizontal Frequency 30 – 82 KHZ Vertical Refresh Rate 56– 76 HZ. Maximum Pixel Clock 156