ViewSonic VX800-3 Service Manual Download Page 46

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4.2 No Display on Screen (Screen is black, LED is off)

Check

Is screen black?

Check that C202 positive is at 5V. (FIG 2.)

Check that the voltage level of CN100 is

approximately 12V

Check CN301 pin1

is12V, pin5 is 5V

IC100 failure

FB100, FB101

failure

F100 or power board failure

YES NO

Inverter failure

Check IC400

Pin 114 failures

YES

ViewSonic Corporation

Confidential – Do Not Copy

00-3

Summary of Contents for VX800-3

Page 1: ...Service Manual ViewSonic VX800 3 Model No VLCDS26105 1W 18 Color TFT LCD Display VX800 3__SM_645 Rev 1a Feb 2003 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583...

Page 2: ...with respect to 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...

Page 3: ...overheating Do not block ventilation slots and openings with objects or install the display in a place where ventilation may be hindered z Do not install this display near a motor or transformer wher...

Page 4: ...ntrol Description 21 2 1 User control functions 22 2 2 OSD operation flow 22 3 Circuit Description 31 3 1 Interface Board 32 3 2 Audio Board 36 4 Troubleshooting Flow Chart 38 4 1 Figure of Waveform 3...

Page 5: ...Mechnical Parts List 56 7 Schematic Diagrams 57 8 PCB Layout 64 9 Parts Lists 67 9 1 Recommended Spare Parts List 67 9 2 Complete Parts List 69 wj ViewSonic Corporation Confidential Do Not Copy VX800...

Page 6: ...Right 80 min CR 10 1 Anti Glare Input Signals RGB Digital Analog 0 7 Vp p 75 Separate sync Composite sync Sync On Green TMDS Positive Polarity TTL level Input connector Analog mini D sub 15 pin x 1 Di...

Page 7: ...egree C 20 to 60 C 5 to 85 no condensation wetbulb 29 degree C Accessories AC power cord UL AC power cord Schuko Analog VGA cable DVI D cable Audio cable Micphone cable ViewSonic CD Wizard 1 8m 1 8m 1...

Page 8: ...rix TFT MVA Dot pitch 0 093 H x 0 279 V mm Pixel pitch 0 279 H x 0 279 V mm Dot number 1280 x 1024 x 3 dots Backlight Edge lighting type with 6 CCFLs Cold Cathode Fluorescent Tube Brightness 200 cd m2...

Page 9: ...2 3 3 5 Connector PC99 requirement Audio in Lime Green pantone 577C 2 3 3 6 Cable length 1 8 m 2 3 3 7 Audio DPMS Speakers stay on when the rest of the monitor is in power saving 2 3 3 8 Speakers Impe...

Page 10: ...gative differential input channel 1 10 RX1 TMDS positive differential input channel 1 11 GND Logic Ground 12 Reserved 12 Reserved No connection 13 Reserved 13 Reserved No connection 14 VCCX Power 15 G...

Page 11: ...0KHz 75 0 1 0Hz 640X480 75 VESA STANDARD MOD 7 43 27 1 0KHz 85 0 1 0Hz 640X480 85 VESA STANDARD MOD 8 35 16 1 0KHz 56 25 1 0Hz 800X600 56 VESA STANDARD MOD 9 37 88 1 0KHz 60 32 1 0Hz 800X600 60 VESA S...

Page 12: ...t Image Center 400 500 White Brightness L VMAX Full White 200 250 cd m2 Uniformity of Brightness Bmin Bmax 70 80 Response At 25 degree Tpd All White All Black All Black All White 10 15 15 20 ms ms Rig...

Page 13: ...wing angle is measured as follows 4 Q ENQEM Q ENQEM 4 0QTOCN Note 3 Definition of response time is as follows Response time is measured when the display data is changed from white to black 9 ViewSonic...

Page 14: ...T OFF Note 4 Judge points for brightness uniformity Brightness uniformity is judged at nine 9 points on display area 9 3 5 7 1 128 512 896 98 384 670 6 2 4 8 BUNI Bmin Bmax Bmax Maximum Brightness Bmi...

Page 15: ...1 Minimum Luminance of white center 250 nits Typical 200 nits Minimum White Uniformity 80 5 points measurement Chromaticity values red green blue center x 0 030 y 0 030 Color temperature x 0 310 0 03...

Page 16: ...ty When the input display mode is not 1280x1024 the image area is changed as follows Flex Scan Input display Expanded Rate Expanded Mode Mode Resolution Horizontal Vertical Resolution Expansion 1 640x...

Page 17: ...Appendix III 3 4 2 Bar Code Number Label Carton Box Material Art Paper Color White Base Black Letter Size 76 W X 76 H mm Location Carton Box Side Wall Contents Appendix III 3 4 3 Serial Number Label...

Page 18: ...ugh 40 C Humidity 20 To 85 39 degree welt bulb Altitude 0 3 000 Meter 5 2 Non operating Conditions Temperature 20 through 60 C Humidity 5 To 85 39 degree welt bulb Altitude 0 12 000 meter 1 6 Factory...

Page 19: ...endix I Preset Signal Timings H total H pulse H front H back Horizontal V total V pulse V front V back V active Vertical H Video H active V Video 25 ViewSonic Corporation Confidential Do Not Copy VX80...

Page 20: ...nt porch Tvf 37 12 10 3 1 9 1 H sync Polarity Positive Negative Negative Negative Negative Negative Negative V sync Polarity Negative Positive Negative Negative Negative Negative Negative H resolution...

Page 21: ...z 70 069 72 082 75 029 84 997 60 02 75 025 60 00 Pixel rate MHz 75 000 78 084 78 750 94 500 108 135 74 250 H sync Ths 136 136 96 96 112 40 144 H back porch Thb 144 160 176 208 248 270 248 Count num H...

Page 22: ...t porch Tvf 37 12 10 6 1 9 1 H sync Polarity Positive Negative Negative Negative Negative Negative Negative V sync Polarity Negative Positive Negative Negative Negative Negative Negative H resolution...

Page 23: ...cy kHz 58 099 60 023 68 677 63 981 45 000 V frequency Hz 72 082 75 029 84 997 60 02 60 00 Pixel rate MHz 78 084 78 750 94 500 108 74 250 H sync Ths 136 96 96 112 40 H back porch Thb 160 176 208 248 27...

Page 24: ...0 20 20 20 20 00 00 110 00 FC 00 56 58 38 30 30 2D 33 120 0A 20 20 20 20 20 00 AE Digital 128 BYTES OF EDID CODE 0 1 2 3 4 5 6 7 8 9 ________________________________________ 0 00 FF FF FF FF FF FF 00...

Page 25: ...Serial No Label UPC MODEL NUMBER VLCDS26105 1W SERIAL NUMBER A28YYWWnnnnn 7 66907 81271 8 ViewSonic VX800 3 M Made In China ViewSonic VX800 Model Number VLCDS26105 1 Serial Number A28YYWWnnnnn 31 Vie...

Page 26: ...no OSD will toggle the digital input port and analog input port to display 3 Press up and down button simultaneously will reset the contrast and brightness to default 4 Press 1 button will enter OSD m...

Page 27: ...t automatically sizes centers and fine tunes the video signal to eliminate waviness and distortion Press the 2 button to confirm to do auto adjust NOTE Auto Image Adjust works with most common video c...

Page 28: ...justs backlight brightness level of screen image increase brightness decease brightness Input Select press or button to select Input Source Audio press or button to scroll desired menu option Press 2...

Page 29: ...s more of the sound to the left speaker directs more of the sound to the right speaker Bass Treble adjusts the high treble and low bass frequency audio output Press 2 button to select bass adjustment...

Page 30: ...most office settings with fluorescent lighting 6500K Adds red to screen image for warmer white and richer red 5400K Adds green to screen image for a darker color 5000K Adds blue and green to screen im...

Page 31: ...n H Position moves screen image left or right move screen image to left moves screen image to right Press the 2 button to toggle between H or V Position V Position moves screen image up or down move s...

Page 32: ...idth of image Fine Tune Sharpness adjusts the clarity of a non SXGA 1280 x 1024 RGB signal Press or to adjust Setup Menu Language Setup Menu Resolution Notice OSD Position OSD Timeout OSD Background 1...

Page 33: ...r button to select the Enable or Disable the Resolution Notice OSD Position press the 2 button to select the OSD H Position or OSD V Position OSD H Position moves OSD left moves the OSD right Resoluti...

Page 34: ...Position moves OSD down moves the OSD up OSD Timeout sets the length of time the Onscreen Display screen is displayed before exiting OSD Background 3 ViewSonic Corporation Confidential Do Not Copy VX...

Page 35: ...Manual Image Adjust H Size H Position V Position Fine Tune Sharpness Setup Menu Language Resolution Notice OSD Position OSD Timeout OSD Background Memory Recall These functions are not available in Di...

Page 36: ...2 IC501 DVI_SCL SCL SDA IC404 DATA EEPROM BOARD CN302 AUDIO DVI D DIGITAL IC603 74F14 HD 15 CN601 HS VS 15PINS CN600 Hsync Vsync RGB VGA_SDA VGA_SCL ANALOG I P 5V L17KMW L18HMW 05AAW LCD MONITOR BLOCK...

Page 37: ...Pin 114 controls Inverter enable or disable Pin 113 enable vcc for panel 43 ViewSonic Corporation Confidential Do Not Copy VX800 3 Pin 125 send a HI signal when audio is invalid send a LOW signal when...

Page 38: ...pported without the need for external sync separation extraction circuits The gm5120 features four clock inputs All additional clocks are internal clocks derived from one or more of these four using D...

Page 39: ...rs 255 colors 1 transparent is available In character mapped mode a maximum of four colors per character are available In 8 bit bitmapped mode any pixel can be assigned any one of 256 user defined tru...

Page 40: ...put to LVDS output drivers The frequency of CLKOUT is the same as the input clock CLKIN The SN75LVDS83 requires no external components and little or no control The data bus appears the same at the inp...

Page 41: ...re incorporated into a single chip Loudness function and Selectable input gain are also provided to build a highly effective electronic Audio processor having the highest performance and reliability w...

Page 42: ...I IIC Clk ICA1 control regulate the voltage 12Vto9V to the ICA2 Volume signal through ICA2 pin24 right pin25 left into audio amplifier ICA3 2 2 Audio amplifier ICA3 TDA1517 is an integrated class B du...

Page 43: ...4 Troubleshooting Flow Chart 4 1 Figure of Waveform FIG 1 12V FIG 2 5V FIG 3 3 3V FIG 4 2 5V FIG 5 32 GRAY SIGNAL INPUT FIG 6 H SYNC 49 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 44: ...FIG 7 V SYNC FIG 8 14 3M CLOCK FIG 9 DISPLAY CLOCK FIG 10 DISPLAY H SYNC FIG 11 DISPLAY V SYNC FIG 12 DISPLAY ENABLE 4 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 45: ...FIG 13 LVDS TX0 FIG 14 LVDS TX0 FIG 15 LVDS CLOCK FIG 16 LVDS CLOCK FIG 17 AUDIO SINE SIGNAL IN FIG 18 AUDIO SINE SIGNAL OUT 51 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 46: ...s at 5V FIG 2 Check that the voltage level of CN100 is approximately 12V Check CN301 pin1 is12V pin5 is 5V IC100 failure FB100 FB101 failure F100 or power board failure YES NO YES NO YES NO Inverter f...

Page 47: ...n48 FIG 14 Pin39 FIG 15 Pin40 FIG 16 Failure point The cable is disconnected Failure point The cable is disconnected Check CN301 pin1 is12V pin5 is 5V Check IC502 Pin 2 4 is low voltage Failure point...

Page 48: ...oard failure 2 Disconnected between CN100 and power board Check that FB100 FB101 Is 12V YES NO Check that IC100 pin 2 is about 5V YES NO Failure point F100 failure Failure point FB100 FB101 failure Fa...

Page 49: ...point 1 JA1 failure 2 IC400 pin123 failure Check ICA2 pin11 Pin15 signal is FIG 17 Check ICA1 pin2 is about 12V NO YES YES NO Check ICA5 ICA6 pin 4 is about 5V Failure point 1 QA6 or QA7 failure 2 ICA...

Page 50: ...6 and FIG 7 NO YES NO NO Check that the cable is fully connected between the Interface board and Key board Failure point The cable is disconnected Failure point 1 IC400 pin 1 4 42 43 46 47 125 206 fa...

Page 51: ...5 Adjust Procedure CONTENTS A INSTRUMENT ALIGNMENT 1 PREPARATION OF MANUAL ALIGNMENT 2 COLOR TEMPERATURE ALIGNMENT 3 FACTORY PRESET SETTING 57 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 52: ...ter exit factory mode 1 4 1 Press 2 and down key and power on to set the monitor to the burn in mode 1 4 2 Press VOL and 1 key and power on to set the monitor to the factory mode 1 4 3 To ensure the m...

Page 53: ...300 6500 5400 and 5000 Press 2 to select which color temperature to be adjusted It will show following menu Use 2 key to switch r g b driver Up or down key to adjust the R G B value corresponding to t...

Page 54: ...2 key to select 6500 color temperature adjustment 2 2 2 Use 2 to move cursor to r driver or g driver or b driver and then press up or down key to adjust it to meet following chromaticity spec 6500 k...

Page 55: ...temperature adjustment 2 4 2 Use 2 to move cursor to r driver or g driver or b driver and then press up or down key to adjust it to meet following chromaticity spec 5000 k x 0 346 0 003 y 0 359 0 003...

Page 56: ...6 Mechanical Assembly 62 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 57: ...63 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 58: ...64 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 59: ...BASE ASSEMBLY 65 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 60: ...66 ViewSonic Corporation Confidential Do Not Copy VX800 3 TAPE...

Page 61: ...90X DC AC I V 29 310901010X SCREW M3 0 5 8 30 310030080X SCREW M3 0 5 8 31 367047370X WIRE AUDIO TO SPK 32 M LCD 0826 0124 5051800501 18 TFT PANEL 33 367019040X WIRE AUDIO TO I F 34 367019400X WIRE I...

Page 62: ...7 Schematic Diagrams 57 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 63: ...58 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 64: ...59 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 65: ...60 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 66: ...61 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 67: ...62 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 68: ...63 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 69: ...8 PCB Layout ViewSonic Corporation Confidential Do Not Copy VX800 3 64...

Page 70: ...ViewSonic Corporation Confidential Do Not Copy VX800 3 76...

Page 71: ...77 ViewSonic Corporation Confidential Do Not Copy VX800 3...

Page 72: ...S20C K B SPK COVER 28 M SCW 0824 0620 3109020500 SCREW T 4 1 6 10 PAN C S18C BACK CABINET PANEL BRKT 29 M SCW 0824 0620 3109020500 SCREW T 4 1 6 10 PAN C S18C BACK CABINET 30 M SCW 0824 0431 310902080...

Page 73: ...70900 AC SOCKET ASSY L19EMW05AAW L20 74 M WR 0828 0682 3670190400 WIRE WITH HOUSING 1007 28 L12 AUDIO TO I F 75 M WR 0828 0689 3670190700 WIRE WITH HOUSING 20276 30 L2 PANEL TO I F 76 M WR 0828 0690 3...

Page 74: ...6 BIND C S18C Z 2 PCE 26 M SCW 0824 0413 3109011400 SCREW T M3 0 5 6 BIND C S18C Z 2 PCE 27 M SCW 0814 0694 3109015000 SCREW T 3 1 27 8 PAN C S20C 3 PCE 28 M SCW 0824 0620 3109020500 SCREW T 4 1 6 10...

Page 75: ...808 7739 3200648800 NAME PLATE ABS 94HB 1 PCE 88 4020371607 D 180 41 PLASTIC ABS 94HB 41 D 180 11 GRM 89 4020371609 SD 0150 41 PLASTIC ABS 94HB 41 SD 0150 11 GRM 90 4020371614 PA 707 41 PLASTIC ABS 94...

Page 76: ...3GEYJ 221 RES CH 1 10W 220 J 0603 1 PCE 150 E R 0405 7055 0343221300 ERJ 3GEYJ 221 RES CH 1 10W 220 J 0603 1 PCE 151 E R 0405 6687 0343222300 2322 702 60222 RES CH 1 10W 2 2K J 0603 1 PCE 152 E R 040...

Page 77: ...30V 7A 28mohm SO 8PIN 1 PCE 206 E Q 0402 1550 242601100223 GF4412 FET 30V 7A 28mohm SO 8PIN 1 PCE 207 E Q 0402 1549 242601100231 SI4412DY T1 FET 30V 7A 0 028ohm SO 8 1 PCE 208 E Q 0402 1549 2426011002...

Page 78: ...3GEYJ 103 RES CH 1 10W 10K J 0603 1 PCE 267 E R 0405 6685 0343103300 ERJ 3GEYJ 103 RES CH 1 10W 10K J 0603 1 PCE 268 E R 0405 6685 0343103300 ERJ 3GEYJ 103 RES CH 1 10W 10K J 0603 1 PCE 269 E R 0405 6...

Page 79: ...05 RS8M 22R0 J1 RES ARRAY 1 16W 22 J 16P8R 4 1 1 PCE 327 0619700605 RS8M 22R0 J1 RES ARRAY 1 16W 22 J 16P8R 4 1 1 PCE 328 0619700605 RS8M 22R0 J1 RES ARRAY 1 16W 22 J 16P8R 4 1 1 PCE 329 0619700605 RS...

Page 80: ...PCE 386 E C 0404 4869 1511454000 2238 586 15536 CAP MC CP 50V 01U J X7R 0603 1 PCE 387 E C 0404 4869 1511454000 2238 586 15536 CAP MC CP 50V 01U J X7R 0603 1 PCE 388 E C 0404 4869 1511454000 2238 586...

Page 81: ...P MC CP 25V 1U K X7R 0603 1 PCE 449 1552458000 C0603X104K025T CAP MC CP 25V 1U K X7R 0603 1 PCE 450 1552458000 C0603X104K025T CAP MC CP 25V 1U K X7R 0603 1 PCE 451 1552458000 C0603X104K025T CAP MC CP...

Page 82: ...00 1 PCE 507 E Q 0402 7017 211522000205 MMBT3906LT1 TR 40V 0 2A SOT 23 100 300 1 PCE 508 E Q 0402 7017 211522000205 MMBT3906LT1 TR 40V 0 2A SOT 23 100 300 1 PCE 509 211522000217 MMBT3906 TR 40V 0 2A S...

Page 83: ...12 MLB 321611 0120P N CORE BEAD 100MHZ 120 OHM 4A 1 PCE 565 2921113212 MLB 321611 0120P N CORE BEAD 100MHZ 120 OHM 4A 1 PCE 566 2921113212 MLB 321611 0120P N CORE BEAD 100MHZ 120 OHM 4A 1 PCE 567 2921...

Page 84: ...46 4dB 1 PCE 599 2973007402 PWB D0 L2 FR 4 15 5 60 MICROP 1 PCE 600 3072230200 JY 3561 F1 070 CONN PHONE JACK OD3 5 7P 1 PCE 601 3072230300 JY 3561 51 070 CONN PHONE JACK OD3 5 7P 1 PCE 8 ViewSonic Co...

Page 85: ...ce A What do you think about the content after reading VX800 3 series Service Manual e m a N e l t i T y n a p m o C d d A l e T x a F l i a m E m e t I t n e l l e c x E d o o G r i a F d a B t n e t...

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