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ViewSonic VG1930wm-3, Service Manual

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TABLE OF CONTENTS 

 

 

1.  Precautions and Safety Notices 

1 

2. Specification  

5 

3.  Front Panel Function Control Description   

15 

4. Circuit 

Description 

21 

5. Adjusting 

Procedure 

28 

6.  Trouble Shooting Flow Chart 

64 

7. Block 

Diagrams  

72 

8. Schematic 

Diagrams  

73 

9.  PCB Layout Diagrams   

7

8

 

10.  Exploded Diagram And Spare Parts List 

84 

11.  Recommended Spare Parts List   

86 

 

 

 ii

 

ViewSonic Corporation 

Confidential - Do Not Copy 

   

VG1930wm-3 

Summary of Contents for VG1930wm-3

Page 1: ...ViewSonic VG1930wm 3 Model No VS11419 19 Color TFT LCD Display VG1930wm 3_SM Rev 1a Jan 2007 Service Manual ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583...

Page 2: ...specifically disclaims any warranty of merchantability or fitness for any particular purpose Further ViewSonic reserves the right to revise this publication and to make changes from time to time in t...

Page 3: ...scription 15 4 Circuit Description 21 5 Adjusting Procedure 28 6 Trouble Shooting Flow Chart 64 7 Block Diagrams 72 8 Schematic Diagrams 73 9 PCB Layout Diagrams 78 10 Exploded Diagram And Spare Parts...

Page 4: ...in such areas as the associated transformer circuits 4 LCD Module Handling Precautions 4 1 Handling Precautions 1 Since front polarizer is easily damaged pay attention not to scratch it 2 Be sure to t...

Page 5: ...module contains a small amount of materials having no flammability grade The LCD module should be supplied with power that complies with the requirements of Limited Power Source IEC60950 or UL1950 or...

Page 6: ...cover of the monitor Do not touch the surface of the polarizer Surface of the panel is pressed by fingers this may cause MURA Take out the monitor form carton Take out the monitor by grasping the LCD...

Page 7: ...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 4 ViewSonic Corporation Confidential Do Not Copy VG19...

Page 8: ...ion Active Off Mode Max 2 W Audio W 1 5w X 2 Tilt 5 20 Swivel xx xx 360 Pivot XX XX No Ergonomics Height Adjust XX XX mm 0 80mm OSD Control 1 2 X Yes Physical W x H x D 460 mm W x 434 mm H x 230 mm D...

Page 9: ...1 and Hot Plug Detect DDC Yes Detached cable refer the Appendix A DVI D Cable 1 8m black with PC 2001 For Region code P A J K S units only Audio Cable 1 8m black with PC 2001 Yes MIC Cable 1 8m black...

Page 10: ...nitor Maximum Mac Video Signal 1250 mV with no damage to monitor Sync Signals TTL DDC 1 2B Compliant with version 1 1 Sync Compatibility Separate Sync Composite Sync SOG Video Compatibility Shall be c...

Page 11: ...one cycle with no damage Power Supply Missing Cycle Immunity Shall be able to function properly without reset or visible screen artifacts when cycle of AC power is randomly missing at nominal input Po...

Page 12: ...40 x 480 72 Hz 37 9 KHz DMT 8 640 x 480 75 Hz 37 5 KHz DMT 9 720 x 400 70 Hz 31 5 KHz 10 720 x 480 60 Hz 31 5 KHz DTV 11 720 x 576 50 Hz 31 3 KHz DTV 12 800 x 600 56 Hz 35 1 KHz DMT 13 800 x 600 60 Hz...

Page 13: ...e worse than 60Hz Primary Presets 1440x900 60Hz User Presets Number of User Presets recognized timings Available 10 presets total in FIFO configuration Changing Modes Maximum Mode Change Blank Time fo...

Page 14: ...ss Contrast adjust recall both of Contrast and Brightness to default 1 2 toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode 70Hz only 1 White Balance Not shown on user s guide 1 Power...

Page 15: ...ock will be deactivated by pressing the front panel control buttons 1 again for 10 seconds Note 1 Status bar indicating Power Button lock or unlock is in progress and when complete it will indicate Po...

Page 16: ...OSD H Position 50 Treble N A OSD V Position 50 Bass N A OSD Time Out 15 720x400 640x400 720x400 OSD Background On 2 7 AUDIO INTERFACE SPEAKER SPECIFICATION Line input connection 3 5 mm stereo jack Lin...

Page 17: ...Life 40000 Hrs Min 300 cd m2 Typ after 30 minute warm up Luminance Center CT 6500K Contrast Brightness Max 230 cd m2 Min after 30 minute warm up Brightness Uniformity 13 points 77 Typ 67 Min Contrast...

Page 18: ...d adjusts the displayed control Also a shortcut to display the Contrast adjustment control screen Power light Blue ON Orange Power Saving Standby Power On Off Displays the Main Menu or exits the contr...

Page 19: ...ontrol screen tells what to do next 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 S or down T buttons 5 To...

Page 20: ...Audio Adjust Volume increases the volume decreases the volume and mutes the audio Mute temporarily silences audio output Color Adjust provides several color adjustment modes including preset color te...

Page 21: ...select color R G or B press button 2 2 To adjust selected color pressSandT Important If you select RECALL from the Main Menu when the product is set to a Preset Timing Mode colors return to the 6500K...

Page 22: ...l Position moves the screen image left or right and up or down Fine Tune sharpens the focus by aligning text and or graphics with pixel boundaries NOTE Try Auto Image Adjust first Sharpness adjusts th...

Page 23: ...rs 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 pushe...

Page 24: ...support for EMI management The TSUM56AL incorporates the world s first coherent oversampled RGB graphics ADC in a monitor controller system The oversampling ADC samples the input RGB signals at a freq...

Page 25: ...0 51 84 60 22 30 50 98 36 00 9A 00 11 00 70 00 1C 00 00 00 FF 00 51 43 36 80 30 36 30 31 30 30 30 30 31 0A 90 00 00 00 FD 00 32 4B 1E 52 0E 100 00 0A 20 20 20 20 20 20 00 00 110 00 FC 00 56 47 31 39 3...

Page 26: ...56Hz VESA 800 X 600 60Hz VESA 36 ESTABLISHED TIMING II 800 X 600 72Hz VESA 800 X 600 75Hz VESA 832 X 624 75Hz Apple Mac II 1024 X 768 60Hz VESA 1024 X 768 70Hz VESA 1024 X 768 75Hz VESA 1280 X 1024 7...

Page 27: ...rizontal Polarity Vertical Polarity 72 89 Detailed Timing Descriptor Block 2 Monitor Serial Number QC6060100001 90 107 Detailed Timing Descriptor Block 3 Monitor Range Limits Min Vertical Freq 50 Hz M...

Page 28: ...0 110 00 FC 00 56 47 31 39 33 30 77 120 6D 0A 20 20 20 20 00 32 08 09 ID Manufacturer Name ________________ VSC 11 10 Product ID Code _____________________ 9D1E 12 15 Last 5 Digits of Serial Number __...

Page 29: ...4 X 768 70Hz VESA 1024 X 768 75Hz VESA 1280 X 1024 75Hz VESA 37 Manufacturer s Reserved Timing 1152 X 870 75Hz Apple Mac II 38 53 Standard Timing Identification 1440 X 900 60Hz 1440 X 900 75Hz 1280 X...

Page 30: ...scriptor Block 2 Monitor Serial Number QC6060100001 ______________________________________________________________________ 90 107 Detailed Timing Descriptor Block 3 Monitor Range Limits Min Vertical F...

Page 31: ...econds during which time you will notice the image change 3 Firmware Test Patten Burn in Model Refer to Chap3 Hot Keys for Function Control Make sure the F W is the latest version 4 DCC Test Patten ED...

Page 32: ...Screen Red Inspection Item Bright Dot Partial Line Defect 12 Green Test Signal 1400 900 60Hz Test Pattern Full Screen Green Inspection Item Bright Dot Partial Line Defect 13 Blue Test Signal 1400 900...

Page 33: ...4 256 Gray Scale From 0 to 100 White Figure 2 3 Black Full Screen Black Figure 3 4 Red Full Screen 50 Red Figure 4 5 Green Full Screen 50 Green Figure 5 6 Blue Full Screen 50 Blue Figure6 7 White Full...

Page 34: ...Figure 5 Figure 6 Figure 7 Figure 8 31 ViewSonic Corporation Confidential Do Not Copy VG1930wm 3...

Page 35: ...el 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 Notebo...

Page 36: ...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 37: ...ss Change button for selecting the path that you want and then press Next button to continue see Fig 2 4 Fig 2 4 2 5 Press Install button to continue see Fig 2 5 Fig 2 5 34 ViewSonic Corporation Confi...

Page 38: ...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 35 ViewSonic Corporation Confidential Do No...

Page 39: ...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 36 ViewSonic Corpo...

Page 40: ...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 41: ...d 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 38 V...

Page 42: ...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 39 ViewSonic Corporation Confidential Do Not Copy VG1930wm...

Page 43: ...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 44: ...user changes the MTV type it must load file again or the buffer of load file will be cleared 4 3 CRC cyclic redundancy check the host can check CRC register s result instead of reading every byte in f...

Page 45: ...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 46: ...5 2 If user uses hardware ISP to read MCU content it shows as Fig 5 2 Fig 5 2 43 ViewSonic Corporation Confidential Do Not Copy VG1930wm 3...

Page 47: ...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 44 ViewSonic Corporation Confidential Do Not Copy VG1930wm 3...

Page 48: ...d the error message display 2 If you using the MTV312M64 or before MCU serials the MCU will always in ISP Mode even programming fail or erase MCU that instead of select or press Reset MCU 45 ViewSonic...

Page 49: ...ware 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 Def...

Page 50: ...7 4 The followings show the relationship between the code and the security code 47 ViewSonic Corporation Confidential Do Not Copy VG1930wm 3...

Page 51: ...or Schematic 9 Adaptor Linking The Monitor Set Connect with Printer Cable 25Pins to 25Pins PC HOST Connect with VGA Cable 15Pins to 15Pins ISP Adaptor 48 ViewSonic Corporation Confidential Do Not Copy...

Page 52: ...Put the monitor in the PE bag and cover the small PE bag on the stand Figure 2 Figure 1 Figure 2 1 3 Fold the left bottom of PE bag s opening mouth to the back of the monitor Figure 3 1 4 Take the le...

Page 53: ...e monitor Figure5 1 6 Take the left side cushion and fix it onto the left side of the monitor Figure 6 Figure 5 Figure6 1 7 Put the monitor into the carton panel screen should face to carton handle si...

Page 54: ...Monitor Assembly and Disassembly 1 Separate Stand Assy Step 1 Separate the Stand Cover Step 2 Loose the Stand 4 Screws Step 3 Completed 51 ViewSonic Corporation Confidential Do Not Copy VG1930wm 3...

Page 55: ...Cover 2 Screws Step 2 Separate the front Bezel hooks to take Bezel and Panel apart Step 3 Separate the side hooks of Bezel to take Bezel and Rear Cover apart Step 4 Completed 52 ViewSonic Corporation...

Page 56: ...1 Disassemble 2 screws of bottom of panel and lift up Panel from Rear cover Step 2 Remove 2 pieces Backlight Wires and A D Board connect Wire Step3 Completed 53 ViewSonic Corporation Confidential Do...

Page 57: ...function key Board Step 1 Remove 2 pieces Wires of Power Key Board Step 2 Remove connect wire of Power Key Board Step 3 Remove Wire of Power Key Board Step4 Completed 54 ViewSonic Corporation Confide...

Page 58: ...arate Metal Cover Step1 Loose all Screws of support plate and Metal Cover Step2 Remove Support plate Step3 Separate Metal Cover Step4 Completed 55 ViewSonic Corporation Confidential Do Not Copy VG1930...

Page 59: ...6 Remove Lips Board And A D Board Step 1 Loose 4 Screws of Lips Board Step 2 Loose 3 Screws of A D Board Step 3 Completed 56 ViewSonic Corporation Confidential Do Not Copy VG1930wm 3...

Page 60: ...hange Lips Board and A D Board Step 1 Place new A D Board and fasten 4 screws wihte Left red Right Step 2 Assemble Lips Board Step 3 Completed 57 ViewSonic Corporation Confidential Do Not Copy VG1930w...

Page 61: ...8 Assemble Metal Cover and Support plate Step 1 Assemble Metal Cover Step 2 Assemble Support plate Step 3 Completed 58 ViewSonic Corporation Confidential Do Not Copy VG1930wm 3...

Page 62: ...Step 2 Insert the wire of Power key Board Step 2 Place new Power key Board on Bezel hooks Step 3 Insert 2 pieces Audio wires of Power Key Board Step 4 Insert connect wire of Power Key Board 59 ViewSon...

Page 63: ...Step5 Insert the connect wire of Key Board Step6 Assemble Key Board of Bezel hooks Step7 Completed 60 ViewSonic Corporation Confidential Do Not Copy VG1930wm 3...

Page 64: ...anel Step 1 Insert 1 piece of Backlight wires Step 4 Completed Insert another piece backlight wire of Lips Board Step 3 Step 2 Insert Wires of A D Board 61 ViewSonic Corporation Confidential Do Not Co...

Page 65: ...cover and Assembly the right hooks of the Bezel first Step 2 Assemble Bezel hooks Bezel and Panel apart Step 3 Completed 12 Assemble Stand and Hinge Cover Step 1 Assemble Stand 62 ViewSonic Corporati...

Page 66: ...Step2 Assemble Hinge Cover Step 3 Completed 63 ViewSonic Corporation Confidential Do Not Copy VG1930wm 3...

Page 67: ...Repair Testing Flash Dots Bright Dot Dark 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 L...

Page 68: ...rmal Flicker Next Step TEST NG A Completed AD B Change CNT B Change LIPS Change Check Panel Display Noise Beat Display Shut Down Beat Display Flicker No Backlight Display Wave B Panel Change LIPS Chan...

Page 69: ...t Brightness Even Abnormal Next Step TEST NG Completed B Booting Delay C Beat Display No Backlight Check PCBA AD B Change LIPS Change Check Panel Check PCBA Panel Change LIPS Change CNT B Change AD B...

Page 70: ...Defect Vertical Weak Line Peculiar Smell Check PCBA Check Panel Horizontal Weak Line Next Step TEST NG AD B Change Panel Change Horizontal Band Defect C Vertical Band Defect Power Saving Display Abnor...

Page 71: ...er Power ON OFF Abnormal LED Display Abnormal Check PCBA AD B Change CNT B Change CNT B Cable LIPS Change LED B Change LIPS Change Check LIPS Check PCBA Check Wire CNT B Cable LIPS Change LED B Change...

Page 72: ...Can t Input OSD Can t Read OSD Jiggle OSD Display Abnormal Check BIOS LIPS Change VGA cable DVI cable BIOS Update Abnormal Loudspeaker Check PCBA Check Wire AD B Change CNT B Change No Voice Voice Los...

Page 73: ...CBA Check Panel Display Flicker tapping Check PCBA Check Panel AD B Change AD B Change LIPS Change Panel Change CNT B Change CNT B Change Other Abnormal Display Next Step TEST NG Complete Panel Change...

Page 74: ...e value with the preset values Please refer to Appendix Display Mode z Fuzzy Image Adjust Phase z Image too bright Adjust brightness and contrast by OSD z Image too dark Adjust brightness and contrast...

Page 75: ...DA_A HSYNC SOG BIN GIN GNDG GNDB DET_DVI SCL_D G DVI5V R CLK R SDA_D CLK B B G VGA5V DET_VGA B4 2 AUDIO 5V 12V AUDIO_MUTE Volume B5 4 PANEL INTERFACE VLCD PA 0 9 PB 0 9 VCC3V3 VCC_TEST ODCTRL B04 6 SC...

Page 76: ...356M5 B 5 4 3 2 1 C71 0 1uF U11 UTC7805 NC 2 1 3 G I O CN1 Rout 1 2 R17 4 7K 10K C3 0 1uF U2 PT2300 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Shutdown Vcc DC Vol Vol Vin1 Vin2 VO2 GND OUT2 Vcc OUT2 SE BT...

Page 77: ...I 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 31 32 25 26 27 28 29 RX2 RX2 GND RX4 RX4 SCL SDA VS RX1 RX1 GND RX3 RX3 5V GND HP RX0 RX0 GND RX5 RX5 GND RXC RXC Shell Shell RED GRN...

Page 78: ...PB6 RXE2 LVA2M LVA3P PA0 RXE0 LVA0M LVBCKM RXOC LVACKP PA2 LVA0P PA8 LVA3M PA1 RXE1 LVA1M VCC_TEST ODCTRL VCC_TEST ODCTRL RXE0 LVA0P RXO2 LVB2P RXO0 LVB0P RXO1 LVB1P RXEC LVACKP RXE2 LVA2P RXE1 LVA1P...

Page 79: ...F 50V R75 0 NC Q7 MMBT3904L 3 1 2 TC22 100uF 16V R76 2K R71 50 TC20 220uF 16V R82 4K7 R70 4K7 C85 0 1uF D28 SSM12L R81 0 R78 100 TC11 100uF 16V NC Q6 CHT2907 C B E U10 1117 33 1 2 3 4 ADJ VOUT VIN TAB...

Page 80: ...330 C47 0 1uF C56 0 1uF R132 100 R112 100 R121 3K3 NC C69 0 1uF BZ1 BUZZER C54 0 1uF C53 0 1uF FB4 600 OHM C49 0 1uF FB3 600 OHM C45 0 1uF R125 10K FB5 600 OHM R94 20K R120 1 5K R87 100 Q10 MMBT3904L...

Page 81: ...78 ViewSonic Corporation Confidential Do Not Copy VG1930wm 3 9 PCB Layout Diagrams...

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Page 83: ...80 ViewSonic Corporation Confidential Do Not Copy VG1930wm 3...

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Page 87: ...DH Metal Case 1 8 C 00008271 151 MR1 KCIE9E 12H REAR COVER 1 9 PL 00008091 107 010 3073H SCREW 7 10 CB 00008115 631 013 VG1930 AH CONTROL WIRE 1 11 N A 121 001 19A2DH Support Bracket 1 12 B 00008269 8...

Page 88: ...8272 170 002 19V38H PE Foam Bag 1 3 P 00008273 160 00L 19A2DH cushion LEFT 1 4 P 00008274 160 00R 19A2DH cushion Right 1 5 N A 005 001 19A2D BH Carton 1 6 N A 600 181 3400ICH by bom Power cord by bom...

Page 89: ...el RoHS DC 00008224 153 001 19A2DH 16 Screw B3 5 RoHS HW 00008084 107 005 3032H 19 Screw B M3xL5 TP6 RoHS HW 00008085 107 005 3082H 20 Screw M4 5 4 1010 steel ROHS HW 00008086 108 305 4133H 21 Miscell...

Page 90: ...SCPRE RoHS CN2 1 41 N A 483 302 2388H FEMALE180D 2 5P 254FH15 1S H8 50mm TY RoHS CN10 1 42 N A 485 415 9001TH D SUB 15P 8 89 PC99 90D FEMALE1285 15S 004 98F RoHS TEKCOCN6 1 43 N A 485 D25 R001TH DVI D...

Page 91: ...S 2 115 N A 780 104 601C30H SMD BEAD 600ohm 3A 0805 100MHZ RoHS CHILISIN FB3 FB4 FB5 FB6 FB7 FB8 FB9 FB 8 116 N A 780 107 121C50H BEAD SMD 120ohm 5A 1206 CHILISIN RoHS S5 L10 2 117 N A 780 107 121J50H...

Page 92: ...rcuit Description 5 Adjustment Procedure 6 Troubleshooting Flow Chart 7 Recommended Spare Parts List 8 Exploded Diagram and Exploded Parts List 9 Block Diagrams 10 Schematic Diagrams 11 PCB Layout Dia...

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