ViewSonic VG2021m-1 User Manual Download

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ViewSonic VG2021m-1

Model No. VS11234

20” Color TFT LCD

Display

(VG2021m-1_SM Rev. 1a Apr.

2006)

ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA – (800) 888-8583

Service Manual

Display

Summary of Contents for VG2021m-1

Page 1: ...ViewSonic VG2021m 1 Model No VS11234 20 Color TFT LCD Display VG2021m 1_SM Rev 1a Apr 2006 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 Service Manual Display...

Page 2: ...the contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular purpose Further ViewSonic reserves the right to revise this publication and to make change...

Page 3: ...anel Function Control Description 12 4 Circuit Description 17 5 Adjustment Procedure 18 6 Troubleshooting Flow Chart 51 7 Recommended Spare Parts List 59 8 Exploded Diagram and Exploded Parts List 63...

Page 4: ...No modification of any circuit should be attempted Service work should only be performed after you are thoroughly familiar with all of the following safety checks and servicing guidelines 3 Safety Ch...

Page 5: ...When designing the enclosure it should be taken into consideration that no bending twisting forces may be applied to the TFT Module from outside Otherwise the TFT Module may be damaged 12 The cold cat...

Page 6: ...he surface of the polarizer Surface of the panel is pressed by fingers this may cause MURA Take out the monitor with cushion Take out the monitor by grasping the LCD panel That may cause MURA Place th...

Page 7: ...de Max 1 W Audio W 2 5W Tilt 5 20 Swivel xx xx No Pivot XX XX No Ergonomics Height Adjust XX XX mm No OSD Control 1 2 X X Yes Physical W x H x D 459 x 465 x 205 mm 18 1 x18 3x8 1 in Dimension Package...

Page 8: ...ted without damage Over Current Protection N A Leakage Current 3 5mA Max at 254VAC 60Hz EFFICIENCY 80 typical at 115VAC Full Load Fuse Internal and not user replaceable Power Dissipation 50 Watts typ...

Page 9: ...768 70Hz 56 5kHz Yes Yes 14 1152X 864 75Hz 67 5kHz Yes Yes 15 1152X 870 75Hz 70 8kHz Yes Yes 16 1024 x 768 75Hz 60 0kHz Yes Yes 17 1280 x 1024 60Hz 63 4kHz Yes Yes 18 1280 x 1024 75Hz 79 97kHz Yes Yes...

Page 10: ...bit FRC panel 150 130 typ 130 110 min CR 10 Viewing Angle Horizontal vertical 170 150 typ 150 130 min CR 5 Response Time 10 90 Ta 25 C 8 ms Tr 2 ms Tf 6 ms Typ 18 ms Tr 7 ms Tf 11 ms Max Panel Defect...

Page 11: ...Orange Power Saving Standby Power On Off Audio Mute button turns the sound off Displays the Main Menu or exits the control screen and saves adjustments Scrolls through menu options and adjusts the di...

Page 12: ...from this screen You can toggle between control screens adjust the selected option or exit the screen 4 To adjust the setting press the up p or down q buttons 5 To save the adjustments and exit the m...

Page 13: ...y becoming the industry standard for color management with support being included in many of the latest applications Enabling this setting allows the LCD display to more accurately display colors the...

Page 14: ...1400 x 1050 60Hz recommended means that the resolution is 1400 x 1050 and the refresh rate is 60 Hertz Manual Image Adjust Sub menu H Size Horizontal Size adjusts the width of the screen image H V Po...

Page 15: ...ears OSD Position allows the user to move the OSD menus and control screens OSD Timeout sets the length of time the OSD screen is displayed For example with a 30 second setting if a control is not pus...

Page 16: ...s and spread spectrum support for EMI management The TSUM57AK incorporates the world s first coherent oversampled RGB graphics ADC in a monitor controller system The oversampling ADC samples the input...

Page 17: ...CD monitor will start the Auto Adjust process automatically and run for 10 consecutive seconds during which time you will notice the image change 3 Firmware Test Patten Burn in Model Refer to Chap3 Ho...

Page 18: ...0 Black Box Test Signal 1400 1050 60Hz Test Pattern Window standard pattern Inspection Item Bright Dot Line Defect Power 11 RED Test Signal 1400 1050 60Hz Test Pattern Full Screen Red Inspection Item...

Page 19: ...e_0 100_V Vertical 64 256 Gray Scale right left From 0 to 100 White Figure 1 2 Gray_Scale_0 100_H Horizontal 64 256 Gray Scale up down From 0 to 100 White Figure 2 3 Black Full Screen Black Figure 3 4...

Page 20: ...ViewSonic Corporation 17 Figure 5 Figure 6 Figure 7 Figure 8 VG2021m 1 Confidential Do Not Copy...

Page 21: ...lel Printer cable ISP tool Fig 1 Software ISP driver If the O S was Win2000 or Win XP please have to install PORT95NT exe Fig1 In order to ensure can execute ISP program please set BIOS in PC or Noteb...

Page 22: ...yson Century website http www myson com tw 2 2 After extracting the zip file the total files list as Fig 2 2 and double click the file of setup exe to install Fig 2 2 2 3 Press Next button to continue...

Page 23: ...ess Change button for selecting the path that you want and then press Next button to continue see Fig 2 4 2 5 Press Install button to continue see Fig 2 5 Fig 2 5 Fig 2 4 ViewSonic Corporation 20 VG20...

Page 24: ...Information shows package warning press Ignore button to continue see Fig 2 6 Fig 2 6 2 7 Installation has finished press Finish button see Fig 2 7 Fig 2 7 ViewSonic Corporation 21 VG2021m 1 Confiden...

Page 25: ...we could find the shortcut in the setting path or the program bar default setting see Fig 3 1 Fig 3 1 2 2 Security file is a key to use ISP function press button see Fig 3 2 Fig 3 2 ViewSonic Corpora...

Page 26: ...ause ISP function fail it is limited by IIC protocol press button see Fig 3 3 Fig 3 3 2 4 Press Create Security File button to key in security code Adjusting bar to decrease speed of IIC bus see Fig 3...

Page 27: ...nd different security code between hardware ISP and software ISP The security code of software ISP is set by user while coding but the security code of hardware ISP is set by Myson Century Fig 3 5 Vie...

Page 28: ...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 6 ViewSonic Corporation 25 VG2021m 1 Confidential Do Not Co...

Page 29: ...t needs 2 Command No and key in command sequentially for 7C 4C 77 The Command No and command must be set by user while coding About the detail of setting please refer to Section 6 Boot code of ISP Fig...

Page 30: ...4 1 4 2 f user changes the MTV type it must load file again or the buffer of load file will be cleared 4 3 RC cyclic redundancy check the host can check CRC register s result instead of reading every...

Page 31: ...content it is according to program the boot code while coding The limitation is used for the security of customer s code Select Read Target item and press RUN button the MCU content will show as Fig 5...

Page 32: ...5 2 If user uses hardware ISP to read MCU content it shows as Fig 5 2 Fig 5 2 ViewSonic Corporation 29 VG2021m 1 Confidential Do Not Copy...

Page 33: ...message as below Note 1 Disable the Enter ISP Mode option to avoid the error message display 2 If you using the MTV312M64 or before MCU serials the MCU will always in ISP Mode even programming fail o...

Page 34: ...tware ISP could read the MCU content 5 MTV212M MTV312M MTV230M MTV412M MTV512M CS8954 support software ISP 7 3 Boot code of software ISP 1 Initialize MCU a Define the I O pin to HSCL 1 and HSDA 1 b De...

Page 35: ...7 4 The followings show the relationship between the code and the security code ViewSonic Corporation 32 VG2021m 1 Confidential Do Not Copy...

Page 36: ...or Schematic 9 Adatptor Linking The Monitor Set Connect with Printer Cable 25Pins to 25Pins PC HOST Connect with VGA Cable 15Pins to 15Pins ISP Adaptor ViewSonic Corporation 33 VG2021m 1 Confidential...

Page 37: ...the monitor Figure 1 1 2 Put the monitor in the PE bag and seal the bag with tape Figure 2 1 3 Put the cushions on the monitor Figure 3 1 4 Place the monitor into the carton and then put all the acces...

Page 38: ...and Disassembly 1 Separate Stand Assy 1 1 Remove Stand Cover Step 2 Remove the Stand Cover Step 5 Completed Step 3 Press the mark A of Rear Cover Step 1 Remove the Seat Assy Step4 Remove the Stand Ass...

Page 39: ...r Rear Case Assy Separate Bezel hooks to take Bezel and Rear Cover apart Step 1 Loose and remove 4 screws Step 2 Separate Bezel hooks to take Bezel and Rear Cover apart Step 3 Remove Rear Cover Step 4...

Page 40: ...r Board and AD Board 3 1 Remove Metal Cover Step 1 Remove FFC from OSD Board Step 3 Remove 2 pieces of Backlight wires Step 2 Lift up LCD module and remove bezel Step 4 Remove 2 pieces of Backlight wi...

Page 41: ...ViewSonic Corporation 38 Step 5 Loose and remove 4 screws Step 7 Loose and remove 2 screws Step 8 Loose and remove 2 screws Step 6 Remove the Support Plate VG2021m 1 Confidential Do Not Copy...

Page 42: ...c Corporation 39 3 2 Remove Power Board and AD Board Step 9 Loose and remove 2 screws Step 10 Remove the PCBA Cover Step 1 Loose and remove 4 screws Step 2 Remove Lips Board VG2021m 1 Confidential Do...

Page 43: ...ViewSonic Corporation 40 Step7 Completed Step 4 Remove 2 pieces of FFCs Step 3 Remove the FFC Step 5 Loose and remove 4 screws Step 6 Remove AD PCBA VG2021m 1 Confidential Do Not Copy...

Page 44: ...hange New AD Board and Power Board Step 1 Place new AD Board And fasten 4 fixed screws Step 4 Insert FFC Step 3 Insert 2 pieces of FFCs Step 2 Fasten 4 fixed screws Step 5 Insert new Lips Board VG2021...

Page 45: ...oration 42 5 Remove OSD Board Step 6 Fasten 4 fixed screws Step 7 Completed Step 3 Loose and remove 2 screws Step 2 Separate both Audio Cables and OSD board Step 1 Remove the FFC VG2021m 1 Confidentia...

Page 46: ...ge New OSD Board Step 5 Completed Step 1 Place new OSD Board and insert FFC Step 4 Insert Audio cables and FFC Step 4 Remove the FFC and OSD board Step 2 Fasten 2 screws Step 3 Join new OSD board VG20...

Page 47: ...tion 44 7 Add Cover to AD PCB Heatsink Step 1 Join the PCB Cover Step 3 Fasten 2 fixed screws Step 2 Fasten 2 fixed screws Step 4 Fasten 2 fixed screws Step 5 Join the Support Plate VG2021m 1 Confiden...

Page 48: ...Step 11 Completed Step 10 Insert FFC Step 6 Fasten 4 fixed screws Step 8 Insert 2 pieces of Backlight wires Step 7 Insert 2 pieces of Backlight wires Step 9 Join LCD module and remove bezel VG2021m 1...

Page 49: ...on 46 8 Rear Assy Stand Assembly Step 1 Place Rear Cover Step 2 Fasten 4 fixed screws Step 4 Join the Stand Cover Step 5 Join the Seat Assy Step 6 Completed Step 3 Place the Stand Assy VG2021m 1 Confi...

Page 50: ...ark Dot Backlight Light Leakage Mura Image Sticking Brightness spot Particle Dot Defect Check Panel Light On Test Next Step Panel Change Should be Performed to Level 3 Repair stage Abnormal Display TE...

Page 51: ...B Change Inverter B Change Power B Change Check Panel Display Noise Beat Display Shut Down Abnormal Beat Display Flicker No Backlight Display Wave B Panel Change Adapter Change Check Adapter Panel Ch...

Page 52: ...g Delay C Beat Display No Backlight Check PCBA AD B Change Inverter B Change Power B Change Check Panel Check PCBA Panel Change Power B Change Inverter B Change CNT B Change AD B Change Check PCBA VGA...

Page 53: ...eck Panel Horizontal Weak Line Next Step TEST NG AD B Change Panel Change Horizontal Band Defect C Vertical Band Defect Power Saving Display Abnormal Check PCB Check PCBA AD B Change Inverter B Change...

Page 54: ...SD Cable Inverter B Power B Change OSD B Change AC Power Change DC Power CNT Cable Change Adapter Change Check Adapter Check PCBA Check Wire OSD Cable Inverter B Power B Change OSD B Change DC Power C...

Page 55: ...Inverter B Power B Change OSD B Change D sub cable VGA cable DVI cable BIOS Update Abnormal Loudspeaker Check PCBA Check Wire AD B Change CNT B Change No Voice Voice Loss Abnormal Loud L R Abnormal L...

Page 56: ...ange CNT B Change CNT B Change Other Abnormal Display Next Step TEST NG Complete TV Function Display Abnormal Panel Change Should be Performed to Level 3 Repair stage Panel Change Check PCBA Check Wir...

Page 57: ...ppendix Display Mode l Fuzzy Image u Adjust Phase l Image too bright u Adjust brightness and contrast by OSD l Image too dark u Adjust brightness and contrast by OSD l Irregular image u Check the sign...

Page 58: ...5 3 5 5 5 36 Pins CB 00005677 32 D008152 2 18 Accessory Cable Audio Black CB 00005678 32F2818011 1 19 Documentation Safety Label for A201P1 H04 DC 00005666 77 D007646 1 20 SN Label for A201P1 H04 DC 0...

Page 59: ...able A150X2 18AWG 180cm Black JCE Green I C14 E14 W14 32F2818011 1 28 CB 00004287 32F3018003 Accessory Cable D Sub BLACK Common 32 D002132 1 29 CB 00002083 32F0000004 Accessory Cable DVI Black Common...

Page 60: ...ViewSonic Corporation 57 8 Exploded Diagram and Exploded Parts List VG2021m 1 Confidential Do Not Copy...

Page 61: ...1 SEAT ASSY 1 6 C 00005684 40 D007465 STAND ASSY 1 7 N A 41 D007449 COVER HINGE ASSY 1 8 CB 00005676 32 D007464 FFC AD POWER PCBA 1 9 CB 00005675 32 D007466 FFC POWER PCBA OSD PCBA 1 10 B 00005703 35...

Page 62: ...region refer to BOM Carton 1 6 C 00005674 40 D007461 Seat Assy 1 7 N A Different region refer to BOM Menu paper 1 8 N A Different region refer to BOM Menu CD 1 9 CB 00005678 32F2818011 Audio Cable 1 1...

Page 63: ...ion 60 9 Block Diagram OSD Key Pad Audio Out D sub Analog Video Speaker AC Power LDO Main Board LIPS Backlight LCD Module DC 5V DVI D Digital Video 5V Signal Audio In DC 12V 12V 3 3V VG2021m 1 Confide...

Page 64: ...BR2P BR1N BR1P BR0N BR0P BG2N BG2P BG1N BG1P BG0N BG0P BB2N BB2P BB1N BB1P BB0P BB0N FR2N FR2P FR1N FR1P FR0N FR0P FG2N FG2P FG1N FG1P FG0N FG0P FB2N FB2P FB1N FB1P FB0N FB0P FCKN FCKP FSTH BCKN BCKP...

Page 65: ...C80 1206 10u 16V X PbF TP 1 VDPP1 VDPP1 TP 1 VPLL1 VPLL1 1 2 L11 L11 R103 0603 100R 5 R103 0603 100R 5 R210 0603 30K 5 R210 0603 30K 5 C68 0603 100n 25V 7 C68 0603 100n 25V 7 C55 1206 10u 16V X PbF C...

Page 66: ...NV_ON OFF1 INV_ON OFF1 R14 0603 4 7K 5 RoHS R14 0603 4 7K 5 RoHS TP 1 VIN_12V1 VIN_12V1 TP 1 V5A1 V5A1 LP3 FBMJ2125HS420 PbF LP3 FBMJ2125HS420 PbF R182 0603 10K 5 RoHS R182 0603 10K 5 RoHS 1 VOL_ADJ1...

Page 67: ...X 3 3 RoHS R203 0603 2K 1 R203 0603 2K 1 1 2 D9 B240A F D9 B240A F 1 2 D35 1N4148WS F D35 1N4148WS F C52 1206 22u 16V Y RoHS C52 1206 22u 16V Y RoHS GND 1 VOUT 2 VIN 3 VOUT 4 U4 LM1117MPX 3 3 RoHS U4...

Page 68: ...03 75R 1 C158 0603 100n 25V X RoHS C158 0603 100n 25V X RoHS 1 2 D30 BZT52 C5V6S RoHS D30 BZT52 C5V6S RoHS 1 2 D33 UDZSF 5 6B PbF D33 UDZSF 5 6B PbF D2 0603 10p varistor OPEN D2 0603 10p varistor OPEN...

Page 69: ...C33 0603 100n 25V 7 1 2 3 D16 BAV70W D16 BAV70W R40 0603 10R 5 RoHS R40 0603 10R 5 RoHS C162 0603 100p 50V N C162 0603 100p 50V N 1 2 D17 UDZSF 5 6B RoHS OPEN D17 UDZSF 5 6B RoHS OPEN R46 0603 10R 5 R...

Page 70: ...3 1K 5 RoHS OPEN R2 0603 1K 5 RoHS OPEN C1 0603 100n 25V Y RoHS OPEN C1 0603 100n 25V Y RoHS OPEN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 CN3 HEADER 10_2 RoHS CN3 HEADER 10_2 RoHS 1 2 L3 MPZ1608S221 RoHS...

Page 71: ...R F36S HF RoHS CN2 IL FHR F36S HF RoHS L7 FBMJ2125HS420 PbF L7 FBMJ2125HS420 PbF C118 0603 100n 25V X RoHS C118 0603 100n 25V X RoHS PANEL_ON OFF DCDC_ON OFF VCM_PWM GVOFF BSTH V12A V5A PANEL_ON OFF D...

Page 72: ...ViewSonic Corporation 69 11 PCB Layout Diagrams VG2021m 1 Confidential Do Not Copy...

Page 73: ...low Chart 7 Recommended Spare Parts List 8 Exploded Diagram and Exploded Parts List 9 Block Diagrams 10 Schematic Diagrams 11 PCB Layout Diagrams B Are you satisfied with this Service Manual Item Exce...

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