ViewSonic VG900b-1 User Manual Download | Manualshive

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Service Manual

ViewSonic

V

G900

b

-1

(

V

G900b

-1

_SM_5

75

-Rev. 1.0-

October

2002)

ViewSonic

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

Model No. VLCDS2

4020-

2

W

1

9

” Color TFT LCD Display

1
2
3
...
»

Summary of Contents for VG900b-1

Page 1: ...Service Manual ViewSonic VG900b 1 VG900b 1_SM_575 Rev 1 0 October 2002 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 Model No VLCDS24020 2W 19 Color TFT LCD Display...

Page 2: ...he 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 changes...

Page 3: ...G900b 1 1 PRECAUTIONS AND NOTICES 1 2 SPECIFICATIONS 2 3 LOCATION OF CONTROLS 3 5 BLOCK DIAGRAM 9 6 TROUBLE SHOOTING FLOW CHART 11 7 SPARE PARTS LIST 15 8 EXPLODED DIAGRAM AND SPARE PARTS LIST 23 9 SC...

Page 4: ...eating Do not block ventilation slots and openings with objects or install the display in a place where ventilation may be hindered Do not install this display near a motor or transformer where strong...

Page 5: ...al 85q Vertical 85q Response Time 25 ms typ Contrast Ratio 500 1 typ Brightness 250 cd m2 typ Active Display Area 376 mm horizontal x 301mm vertical AC DC adapter Input AC 100 264V 47 63 Hz Output 12V...

Page 6: ...3 LOCATION OF CONTROLS 3 LOCATION OF CONTROLS ViewSonic Corporation 3 Confidential Do Not Copy VG900b 1...

Page 7: ...utton key to turn the display on and then release the and power button 6 The unit is set into Reset mode OSD main window will be shown on the display you can see a red message for ALL RESET with a red...

Page 8: ...ALER SD1210 2 U8 DDC EPROM 24C21A U5 Serial EEPROM 24C16 U17 MPU U15 MTV230P Serial EEPROM 24C16 U9 JP2 TO INVERTER JP3 SWITCH MODE POWER SUPPLY 19 LCD PANEL SW BOARD DPWBN5418T8 INVERTER RUNTP5392T8...

Page 9: ...ure full of colored vertical lines Check power LED Check display resolution Check inverter Check I F board JP1 Check LCD cable Check I F board JP4 Check LCD panel J1 J2 J3 Check I F board Check SW boa...

Page 10: ...YES YES YES NO CHECK 5V 3 3VB LCD_VCC 3V3_MCU START POWER CKT 12V 5V 3 3V CKT POWER CKT CHECK POWER CKT END ViewSonic Corporation 7 Confidential Do Not Copy VG900b 1...

Page 11: ...O P TO SD1210 CKT ADC CKT CHECK I P R G B Video HSYNC pin 30 Coast pin 31 AND I2C BUS Signal START CHECK MCU CKT I2C BUS D_SUB connector And U2 74LV14 ADC CKT REPLACE U3 VCLK00 ViewSonic Corporation...

Page 12: ...CKT CHECK U15 RESET pin 19 12MHZ Pin7 8 H_sync pin 14 V_sync pin13 SIGNAL CHECK MCU_I2C pin 31 32 ROM I2C pin 27 28 ASIC I2C pin 25 26 AND OUTPUT SIGNAL END CHECK U15 F W OR REPLACE ViewSonic Corporat...

Page 13: ...CONTROL SIGNAL CHECK MCU ADC H V BUFFER CKT AND U11 CONTROL SIGNAL U8 PIN 157 ASIC_H U8 PIN 158 ASIC_V U8 PIN 10 ROM_SCL U8 PIN 11 ROM_SDA U8 PIN 13 ASIC_SCL U8 PIN 14 ASIC_SDA U8 PIN 16 12MHZ U8 PIN...

Page 14: ...U8 OSD_HS Pin31 OSD_VS Pin 32 SIGNAL CHECK U15 FBLK Pin42 OSD_B Pin 43 OSD_G Pin44 And OSD_R Pin 1 SIGNAL START OSD CKT CHECK U8 FBLK Pin23 OSD_B Pin 22 OSD_G Pin21 And OSD_R Pin 20 REPLACE U15 REPLAC...

Page 15: ...ntial Do Not Copy VG900b 1 YES YES NO NO YES YES OK PLL1 CKT CHECK U11 FCLK1 Pin 1 and 2 PLL1_H Pin 2 SIGNAL CHECK U11 PIN 6 CLOCK AND PIN 8 HALF_CLOCK SIGNAL START END CHECK U8 FCLK1 Pin 29 VCLK1 Pin...

Page 16: ...YES YES NO YES STAR CHECK LCD_VCC V 3 3V 5 0V 12V AND AUDIO 9 0V END PANEL POWER CKT PANEL POWER CHECK POWER CKT 3 3V 5V 12V AND AUDIO 9 0V ViewSonic Corporation 13 Confidential Do Not Copy VG900b 1...

Page 17: ...AUDIO CKT ViewSonic Corporation 14 Confidential Do Not Copy VG900b 1...

Page 18: ...2030 M WR 0828 0471 QJUM 1045D8050 J7 8 9 10 4 30 232031 M WR 0828 0472 QJUM 1045D8075 J1 J2 J3 3 31 232032 M WR 0828 0473 QJUM 1045D8100 J4 J5 L52 3 32 232033 M WR 0828 0475 QJUM 1045D8150 J6 1 33 26...

Page 19: ...VSIAPL1084 33 A SECOND SOURCE 1 41 260008B VSIRT8171 33 A SECOND SOURCE 1 42 260010 VSIAIC1732 A U1 1 43 260011 VSISI9433DY A U19 20 2 44 260011A VSIFDS4435 A SECOND SOURCE 2 45 260011B VSICEM4435 A S...

Page 20: ...6 112 260092 RNWRB1618T8330M RP19 20 21 22 23 24 25 26 8 113 260093 RNWRB1618T8330M RP27 28 29 30 31 5 114 260094 RNWRB1618T8472A RP33 34 35 36 37 38 39 7 115 260100 VCLFHN1HG104Z A C1 2 3 4 8 9 10 1...

Page 21: ...A 2 2 30 420719 XEPSD30P12000 CAB A 1 1 31 420720 XBMSD30P08000 FOR CAB B 5 5 32 420721 XEPSD30P08000 FOR SW BOARD 4 4 33 420722 XBSSD30P04000 A D SUB 3 HINGE SUPPORT 6 9 34 420723 XBPSN40P12JS0 HINGE...

Page 22: ...8 8268 PSLDM6478D8 A INVERTER SHIELD 1 7 421704 PISL 1250D8 INVERTER MYLER 1 8 421704 PISL 1250D8 A INVERTER MYLAR 1 9 421705 PISL 1256D8 INVERTER SHIELD MYLER 1 10 421705 PISL 1256D8 A INVERTER SHIEL...

Page 23: ...8 EXPLODED DIAGRAM ViewSonic Corporation 20 Confidential Do Not Copy VG900b 1...

Page 24: ...6477D8 1 SHIELD 11 M MS 0808 8264 LANGN1714D8 1 VESA METAL 12 M CV 0830 2342 GCABB1769D8F 1 CAB B 13 C BC 0302 0436 GCOVD2442D8F 1 BACK COVER 14 M LB 0813 0710 HBDG 1278D8F 1 VE LOGO 15 M CV 0830 2335...

Page 25: ...GND GND GND R7 R6 R5 R4 R3 R2 R1 R0 G7 G6 G5 G4 G3 G2 G1 G0 B7 B6 B5 B4 B3 B2 B1 B0 DATACLK HSOUT VSOUT SOGOUT SDA SCL A0 D4 DAN202U 3 2 1 L7 0 1 2 C8 0 1u R21 100 RP2 33RP 1 2 3 4 5 6 7 8 C45 33P L11...

Page 26: ...C62 33p RP13 33RP 1 2 3 4 5 6 7 8 R30 10K RP14 33RP 1 2 3 4 5 6 7 8 R34 100 T22 R27 510 R36 100 T24 R25 0 C54 10u 16v C63 33p ZD6 5 6V 1 2 T25 C64 0 1u C66 22u 16v D5 DAN202U 3 2 1 C50 22u 16v T26 R3...

Page 27: ...125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 B_IN10 B_IN11 B_IN12 B_IN13 DATA_SEL B_IN14 B_IN15 B_IN1...

Page 28: ...C_IN VSYNC_IN ROM_SCL_EEPROM VCLK1 OSD_CLK FCLK1 5Va 5Vb 5Vb U10 F14_SINGLE 1 2 3 5 4 NC A GND VCC Y R53 4 7 U12 74LV4053 11 10 9 12 13 2 1 5 3 14 15 4 6 7 16 8 S1 S2 S3 1Y0 1Y1 2Y0 2Y1 3Y0 3Y1 1Z 2Z...

Page 29: ...GND D27 D0 D1 GND D2 D3 D4 L21BEAD 0805 L22 BEAD 0805 C116 0 1u J1 FI SE30P HF 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 VIN VIN VIN GND GND GND SELLVDS VcontIN...

Page 30: ...2 3 4 C133 0 1u C128 22P R62 100 R67 1K R151 4 7K C124 1u U15 SM0230 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 ROUT XIN...

Page 31: ...0 C152 0 1u L36 BEAD 1206 L33BEAD 1206 R87 NC L31 BEAD 0805 C145 0 1u Q9 MMBT3904L 1 2 3 L34 NC 1206 L35BEAD 1206 C155 100u 16v C143 100u 16v R112 680 T52 L32 NC 1206 R982K C148 0 1u R97 2K R96 10K R...

Page 32: ...ON OFF L46 BEAD 0805 L43 BEAD 0805 JP4 CON7 1 2 3 4 5 6 7 12V 12V SCL SDA AUDIO_MU GND HP_SENSE C163 0 1u AI4 AI D34 1 L44 BEAD 0805 L40 BEAD 0805 J2 DVI I connector 1 2 3 4 5 6 7 8 9 10 15 16 17 18...

Page 33: ...1U AUDIO_L 1 2 C180 1 0U 16V C179 1 0U 16V C190 10P C177 2 2U 25V U22 LA4635 6 8 2 7 4 5 3 1 9 10 11 12 P P OUT IN Vcc IN STBY GND DC GND OUT C192 10P R105 2 2 R113 10 L47 10UH C161 470 16V R110 5 6K...

Page 34: ...POWER 1 3 4 2 5 SW4 VOLUME_DOWN 1 3 4 2 5 SW2 UP 1 3 4 2 5 SW5 MENU 1 3 4 2 5 C195 100pF JP7 HEADER 8 1 2 3 4 5 6 7 8 L53 BEAD L54 BEAD SW3 DOWN 1 3 4 2 5 L55 BEAD L56 BEAD L57 BEAD R124 2 2K R120 4 7...

Page 35: ...10 PCB LAYOUT DIAGRAM ViewSonic Corporation 32 Confidential Do Not Copy VG900b 1...

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