ViewSonic VX2255wmb-4 User Manual Download

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ViewSonic VX2255wmb-4

VX2255wmh-4

Model No. VS11661

22” wide Color TFT LCD

Display

(VX2255wmb-4_VX2255wmh-4_SM Rev. 1a Sep. 2007)

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

Service Manual

Summary of Contents for VX2255wmb-4

Page 1: ...onic VX2255wmb 4 VX2255wmh 4 Model No VS11661 22 wide Color TFT LCD Display VX2255wmb 4_VX2255wmh 4_SM Rev 1a Sep 2007 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 Service M...

Page 2: ...ically 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 the cont...

Page 3: ...afety Notices 1 2 Specification 4 3 Front Panel Function Control Description 23 4 Circuit Description 29 5 Adjusting Procedure 31 6 Trouble Shooting Flow Chart 44 7 Block Diagrams 53 8 Schematic Diagr...

Page 4: ...monitor only in a lean cool dry environment If it gets wet unplug the power cable immediately and consult your closed dealer z Always unplug the monitor before cleaning it Clean the cabinet with a cle...

Page 5: ...thods Incorrect Methods Only touch the metal frame of the LCD panel or the front cover of the monitor Do not touch the surface of the panel Surface of the panel is pressed by fingers and that may caus...

Page 6: ...5wmh 4 VX2255wmb 4 Correct Methods Incorrect Methods Place the monitor on a clean and soft foam pad Place the monitor on foreign objects That could Scratch the surface of the panel or cause Mura The p...

Page 7: ...es On Mode Typ 45 W without audio Power Consumption Off Mode Max 1 W Audio 2W THD 10 Max Yes WebCam 1 3M USB2 0 Windows XP Cable type A to type B Yes Tilt Yes 20 and 5 Swivel 360 Pivot No Ergonomics H...

Page 8: ...dio Power Cable Refer to Appendix G Analog Cable 1 8 m color black with PC 2001 and Hot Plug Detect DDC YES DVI D Cable YES WebCam Hardware spec 1 3M pixel OS support Windows XP Vista Interface suppor...

Page 9: ...ate Composite and Sync on Green 2 TMDS Digital Video Impedance 75 Ohms Analog 100 Ohms Digital Maximum PC Video Signal 950 mV with no damage to monitor Maximum Mac Video Signal 1250 mV with no damage...

Page 10: ...able to withstand 1 5 times nominal line voltage for one cycle with no damage Power Supply Missing Cycle Immunity Shall be able to function properly without reset or visible screen artifacts when cyc...

Page 11: ...Hz 35 kHz V V V V 8 640 x 480 72 Hz 38 kHz V V V V 9 640 x 480 75 Hz 38 kHz V V V V 10 640 x 480 85 Hz 43 kHz V V V V 11 720 x 400 70 Hz 32 kHz V V V V 12 720 x 400 85 Hz 38 kHz V V V V 13 720 x 480...

Page 12: ...y 1680 x 1050 60Hz Auto image should be executed when Switch 1400 x 1050 60Hz and 1680 x 1050 60Hz by 1 2 short cut key 46 1440 x 900 60 Hz 55 9 kHz V V V V 47 1440 x 900 75 Hz 70 6 kHz V V V V 48 160...

Page 13: ...Power Button Button 1 and Button 2 must be one shot logic operation i e there should be no cycling Reaction Time OSD must fully appear within 0 5s after pushing Button 1 Short Cuts Function from the...

Page 14: ...nction descriptions OSD Lock short cuts function for the buttons The OSD lock will be activated by pressing the front panel control buttons 1 for 10 seconds If the user then tries to access the OSD by...

Page 15: ...Execute Auto Image Adjust Note Memory Recall should have no effect for Language Power Lock User Color Settings or Input Priority Resolution Notice Actions Resolution Notice OSD should show on screen...

Page 16: ...length Audio DPMS Speakers stay off when the rest of the monitor is in power saving Note There is no guarantee 1 W at power consumption in Active Off mode when the Audio Cable is connected WebCam Inp...

Page 17: ...ours Min at 7 0mA Luminance 5 point Condition CT User Color Contrast Max Brightness Max 300cd Typ after 30 minute warm up 250cd Min after 30 minute warm up Brightness Uniformity 80 typ 75 min Contrast...

Page 18: ...ance 5 point Condition CT User Color Contrast Max Brightness Max 300cd Typ after 30 minute warm up 250cd Min after 30 minute warm up Brightness Uniformity 76 typ 70 min Contrast Ratio 1000 1 typ 700 1...

Page 19: ...inance 5 point Condition CT User Color Contrast Max Brightness Max 300cd Typ after 30 minute warm up 250cd Min after 30 minute warm up Brightness Uniformity 80 typ 75 min Contrast Ratio 1000 1 typ 700...

Page 20: ...EF 80 B3 00 40 A9 40 95 00 90 40 81 80 81 40 50 71 4F 01 01 21 39 90 30 62 1A 60 27 40 68 B0 36 00 D6 2C 11 00 70 00 1C 00 00 00 FF 00 51 52 4C 80 30 37 30 31 30 30 30 30 31 0A 90 00 00 00 FD 00 32 4B...

Page 21: ...0 75Hz VESA 800 X 600 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 75...

Page 22: ...ty ______________________________________________________________________ 72 89 Detailed Timing Descriptor Block 2 Monitor Serial Number QRL070100001 __________________________________________________...

Page 23: ...40 95 00 90 40 81 80 81 40 50 71 4F 31 0A 21 39 90 30 62 1A 60 27 40 68 B0 36 00 D6 2C 11 00 70 00 1C 00 00 00 FF 00 51 52 4C 80 30 37 30 31 30 30 30 30 31 0A 90 00 00 00 FD 00 32 4B 18 52 11 100 00 0...

Page 24: ...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 75Hz VESA 3...

Page 25: ...ty ______________________________________________________________________ 72 89 Detailed Timing Descriptor Block 2 Monitor Serial Number QRL070100001 __________________________________________________...

Page 26: ...Displays the control screen for the highlighted control Standby Power On Off Power light Blue ON Orange Power Saving Displays the Main Menu or exits the control screen and saves adjustments Webcam in...

Page 27: ...up S or down T buttons 5 To save the adjustments and exit the menu press button 1 twice The following tips may help you optimize your display Adjust the computer s graphics card so that it outputs a...

Page 28: ...mb VX2255wmh 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 pre...

Page 29: ...or red R green G and blue B 1 To 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...

Page 30: ...ical 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...

Page 31: ...n appears 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 no...

Page 32: ...other devices in the system such as the keypad the backlight LED and audio general purpose input output pins a Clock Generation Crystal Input Clock OSCI and OSCO This is the input pair to an internal...

Page 33: ...The power module includes an Inverter and Power regulator The electrical specification described as followings 4 2 1 Power characteristics Rated Input Voltage 100 240 Vac 50 60Hz Operation Input Volt...

Page 34: ...POWER Power on or power off the monitor Hot Key Operation 1 Main Menu 2 Input toggle Analog Digital To immediately activate Brightness Contrast menu Recall both of Contrast and Brightness to default...

Page 35: ...on Notice On Off H Position OSD Position V Position OSD Time Out Setup Menu OSD Background On Off Memory Recall 5 3 2 OSD lock Menu function OSD Lock Menu Function Check Item Method Phenomenon Activat...

Page 36: ...isappear after 10s or by pushing button 1 or 2 Deactivate Resolution Notice Menu Push button 2 under Resolution Notice OSD select Disable 5 3 5 Factory Mode Introduction When input the signal press po...

Page 37: ...rocess finished please press Power to restart monitor EDID Rewrite EDID data to EEPROM If we need to rewrite the EEPROM data please confirm the following steps 1 Plug in VGA Cable we can rewrite the E...

Page 38: ...35 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4 3 Select Run start ISP 4 When the picture show Verify OK ISP finished...

Page 39: ...ator and color analyzer Modes switching check 1 Use Chroma Pattern Generator to make sequence VESA 640x480 800x600 1024x768 1280x1024 MAC 832x624 DOS 640x350 720x400 the detail supported modes and pow...

Page 40: ...37 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4 Disassembly Procedure HINGE COVER Adjust BASE BACK COVER...

Page 41: ...38 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4 Web camera BEZEL...

Page 42: ...39 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4 PANEL MICROPHONE Power key board...

Page 43: ...40 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4 LVDS CABLE KEYPOWER CABLE I F BOARD...

Page 44: ...41 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4 CHASSIS SPEAKER P I BOARD...

Page 45: ...42 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4...

Page 46: ...r Figure 1 1 2 Put the monitor in the PE bag and seal the bag with tape Figure 2 Figure 1 Figure 2 1 3 Put the cushions on the monitor Place the monitor into the carton and then put all the accessorie...

Page 47: ...tire screen is an abnormal color that means the problem happen in the analog circuit part if only some scale appears abnormal color that stand the problem happen in the digital circuit part z If you c...

Page 48: ...45 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4 Interface BOARD DIAGRAM...

Page 49: ...eck primary rectifier voltage Check IC802 C804 T801 Check circuit if short Check F801 P801 RT 801 D801 Check pin6 of IC802 voltage about 12V CheckC810 D803 C807 Check pin2 of IC802 voltage about 3V Ch...

Page 50: ...Circuit Check R822 R823 R824 Change R822 R823 R824 Check the R pin voltage of IC803 about 2 5V Check R819 R820 Check R818 D804 C807 if short Change R818 D804 C807 Check pin2 of IC802 voltage is 3V Che...

Page 51: ...rcuit Check R822 R823 R824 Change R822 R823 R824 Check the R pin voltage of IC803 about 2 5V Check R819 R820 Check R818 D804 C807 if short Change R818 D804 C807 Check pin2 of IC802 voltage is 3V Check...

Page 52: ...01 U502 Is there PWM signal on pin4 of IC501 Yes No Check I F BD Is there High leve voltage on pin10 of IC 501 Yes No Check I F BD Vsense voltage is 2 9V Yes Yes Lamp connector opened Are there PWM si...

Page 53: ...Check VCC 5V Power Fail Check VCC3 3V and VCC1 8V Check FB103 C128 C141 Check Reset Waveform U104 Check C151 Check Crystal Waveform U104 pin127 128 Check C150 C152 X1 Check CCFL Enable U104 Check pin...

Page 54: ...5wmh 4 VX2255wmb 4 White Screen LVDS cable reinsert NG Change LVDS cable NG Check VLCD Is 5V NG Check panel Enable of Panel Enable OK Check Q101 Q103 and Q104 END OK OK OK Check VLCD singals Workmansh...

Page 55: ...tial Do Not Copy VX2255wmh 4 VX2255wmb 4 Bad Screen Bad Screen LVDS Cable Reinsert NG Change LVDS Cable NG OK CheckU105and SDO SCZ SCKSDI RSTN OK NG Workmanship Check X1 C150 and C152 SDO SCZ SCK SDI...

Page 56: ...EEPROM AT24C04N VG A Key LED Sampling Voltage feedback EEPROM 24C04 Audio Input AC Input VGA Input Key Input Speaker Panel Back lamp Regulator 5V to 3 3V Rectifier Filter Circuit Rectifier filter 16V...

Page 57: ...07 1K C109 0 1 16V U101 AP1084K33LA 3 1 2 VIN ADJ VOUT R112 100 C110 4 7u 10V R101 33K R110 4K7 R108 20K C105 0 1 16V R109 470 R106 4K7 C103 0 1 16V Q106 PMBT3904 1 3 2 Q104 PMBT3904 1 3 2 U102 LD1117...

Page 58: ...5 1 R207 4K7 R114 75 D204 BAV99 1 3 2 C113 0 047u 16V ZD202 5V6 R124 100 R117 75 R214 10 1 D105 BAV99 1 3 2 C202 0 1 16V C115 0 047u 16V R216 10 1 D207 BAV99 1 3 2 U103 AT24C02BN 1 2 3 4 5 6 7 8 A0 A1...

Page 59: ...6 71 125 54 58 RIN0P GIN0P SOGIN0 BIN0P RIN0M GIN0M BIN0M HSYNC0 VSYNC0 REXT REFP REFM SDO SCK CSZ SDI GPIO_P24 PWM2 LVACKM XIN XOUT LVA2P LVA2M LVA1P LVA1M LVA0P LVA0M LVB3P LVB3M LVBCKP LVBCKM LVB2P...

Page 60: ...4 Model Title Date Rev ViewSonic Corporation SCALER GND USB_VCC DATA DATA C601 NC 0 1 16V C604 220u 16V R602 4K7 1 2 3 4 CN602 UC11123 LK1 1 2 3 4 5 6 R601 20K CN603 5P 1 5mm 90 5 4 3 2 1 Q601 AP2305...

Page 61: ...R701 10K C701 10u 25V CN702 2P 2 0mm 90 NC 1 2 C705 470u 16V R710 2K C707 470u 16V C708 220u 16V R709 2K C709 0 1 50V R713 100 R711 5K6 R705 30K P701 4 3 2 1 C704 0 47 16V R707 1K U701 TDA8496L 8 11 1...

Page 62: ...00V R823 47K 1 C806 4700p 400V D801 UL4 06 1 2 4 3 ZD803 12V R807 750 1 R827 10R R819 1K C809 47p 1KV R810 470K R830 10K R815 12K 1 C803 0 47 275V CN801 60mm 8P 1 2 3 4 5 6 7 8 Q803 NC PMBT3906 3 1 2...

Page 63: ...4 BAV99 1 2 3 D508 BAV99 1 2 3 D507 BAV99 1 2 3 C514 2700p 50V C523 10p 3KV R502 680 NC C511 0 022 25V R531 1K6 1 R535 15 R527 200 C527 2700p 50V C515 2 2u 16V R514 47K 1 R532 33 R525 1M5 2KV R505 33...

Page 64: ...61 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4 9 PCB Layout Diagrams...

Page 65: ...62 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4...

Page 66: ...63 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4...

Page 67: ...64 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4...

Page 68: ...65 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4 10 Exploded Diagram and Exploded Parts List...

Page 69: ...RD LP2260 1 12 N A 79096150000R OSD KEYPAD LP2260 1 13 N A 79096050000R LENS KEYPAD LP2260 1 14 E 00008421 618100200200R SPEAKER LP2260 1 15 N A 501030206100R BUTTON POWER LP2260 1 16 N A 501030206110...

Page 70: ...RD LP2260 1 12 N A 79096150000R OSD KEYPAD LP2260 1 13 N A 79096050000R LENS KEYPAD LP2260 1 14 E 00008421 618100200200R SPEAKER LP2260 1 15 N A 501030206100R BUTTON POWER LP2260 1 16 N A 501030206111...

Page 71: ...68 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4...

Page 72: ...NG TYPE VIEWSONIC 50mmx75M L 1 PACKING PART LIST VX2255wmb 4 69 ViewSonic Corporation Confidential Do Not Copy VX2255wmh 4 VX2255wmb 4 ViewSonic Model Number VS11661 Rev 1a Item ViewSonic P N Ref P N...

Page 73: ...bles Electronic Components CRT EEPROM Fly Back Transformer Microprocessor LCD TV Serial No Prefix QRL Rev 1a Item ECR ECN ViewSonic P N Ref P N Location Universal number 1 Cord Cable 10A 250V 6FT Aust...

Page 74: ...260 622 VX2255W 100 36 C 00008394 714030009910R ASSY BEZEL B LP2260 37 N A 501010210210R BEZEL B LP2260 100 38 N A 506102000400R LOGO PLATE VIEWSONIC LE1709 THREE BIRDS 100 39 N A 501030206100R BUTTON...

Page 75: ...P2260 37 N A 501010210200R BEZEL W LP2260 100 38 N A 506102000400R LOGO PLATE VIEWSONIC LE1709 THREE BIRDS 100 39 N A 501030206100R BUTTON POWER LP2260 100 40 N A 501120105400R LENS CAMERA LP2260 100...

Page 76: ...n 4 Circuit Description 5 Adjustment Procedure 6 Troubleshooting Flow Chart 7 Block Diagrams 8 Schematic Diagrams 9 PCB Layout Diagrams 10 Exploded Diagram and Exploded Parts List 11 Recommended Spare...

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