ViewSonic VA720-2 Service Manual Download

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EMI
solution

EMI

QPWB-5408T8---C

Custom

Wednesday, August 08, 2001

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ViewSonic Corporation

Confidential – Do Not Copy

00-1

VA720-2

Summary of Contents for VA720-2

Page 1: ...vice Manual VE700 1_SM_545 Rev 1a May 2002 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 ViewSonic VE700 1 Model No VLCDS23724 1W 17 Color TFT LCD Display VA720 2 VLCDS23724...

Page 2: ...expressed or implied 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...

Page 3: ...ROLS 3 4 INTERNAL CONNECTOR PIN DEFINITION 4 5 CABLE PIN DEFINITION 10 6 BLOCK DIAGRAM 13 7 TROUBLE SHOOTING FLOW CHART 14 8 SPARE PARTS LIST 20 Confidential Do Not Copy ViewSonic Corporation iii 9 EX...

Page 4: ...otect the display from 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 mot...

Page 5: ...Angle CR 10 Horizontal 75 Vertical 70 RESPONSE TIME 40 ms typ Contrast Ratio 400 1 typ Brightness 250 cd m2 typ Active Display Area 337 9 mm horizontal x 270 3mm vertical AC DC adapter Input AC 87 26...

Page 6: ...o confirm the current selection 4 ADJUST UP To scroll up in menu or to increase value of selected item 5 ADJUST DOWN To scroll down in menu or to decrease value of selected item 6 POWER INDICATOR The...

Page 7: ...NTER For OSD Adjustment 3 UP For OSD Adjustment 4 DOWN For OSD Adjustment 5 RED For LED 6 GREEN For LED 7 PSW Power ON OFF 8 GND JP1 Output Terminal for inverter unit Connector P N VCNCP0906REJST Pin...

Page 8: ...gnal 7 GREEN RETURN GND for GREEN video signal 8 BLUE RETURN GND for BLUE video signal 9 5V_DDC TO DDC PIN 8 10 SYNC RETURN GND for SYNC Signal 11 GND GND 12 DDC data TO DDC PIN 5 SDA 13 H SYNC Horizo...

Page 9: ...XOOG5 20 XOOG4 21 XOOG3 22 XOOG2 23 XOOG1 24 XOOG0 25 GND 26 XOOB7 27 XOOB6 28 XOOB5 29 XOOB4 30 XOOB3 31 XOOB2 32 XOOB1 33 XOOB0 34 OPOL 35 OLOAD 36 ODOM 37 GND 38 XOCLK 39 GND 40 XODINV 41 GND 42 XO...

Page 10: ...FOR2 7 XFOR1 8 XFOG0 9 XFOG7 10 XFOG6 11 XFOG5 12 XFOG4 13 XFOG3 14 XFOG2 15 XFOG1 16 XFOG0 17 GND 18 XFOB7 19 XFOB6 20 XFOB5 21 XFOB4 22 XFOB3 23 XFOB2 24 XFOB1 25 XFOB0 26 XFFR7 27 XFFR6 28 XFFR5 29...

Page 11: ...XFFB2 49 XFFB1 50 XFFB0 J1 Output terminal for LCD PANEL Connector P N QCNCP2002T8 Pin NO Symbo Function 1 XOFG6 2 XOFG5 3 XOFG4 4 XOFG3 5 XOFG2 6 XOFG1 7 XOFG0 8 GND 9 XOFB7 10 XOFB6 11 XOFB5 12 XOFB...

Page 12: ...1 KEY 2 LED G 3 LED R 4 MENU S1 For OSD Adjustment 5 SELECT S2 For OSD Adjustment 6 GROUND 7 DOWN S4 For OSD Adjustment 8 UP S3 For OSD Adjustment INVERTER CON1 Inverter input Terminal Pin Symbo Func...

Page 13: ...ship Invertercable QCNWS0906T8010 24AWG Shieldingcable connection relationship PHR 6 PHR 6 Pin NO Pin NO 1 1 2 2 3 4 4 3 5 5 6 6 PHR 8 PHR 8 Pin NO Pin NO 1 8 2 7 3 6 4 5 5 4 6 3 7 2 8 1 ViewSonic Cor...

Page 14: ...5 5 42 42 6 6 43 43 7 7 44 44 8 8 45 45 9 9 46 46 10 10 47 47 11 11 48 48 12 12 49 49 13 13 50 50 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30...

Page 15: ...NEL 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 PANEL cable QCODS1476T8 ViewSonic...

Page 16: ...HIC 12V 5V W1 DB15 A D CONVERTER SCALER SD1210 2 T CON U17 J2 J1 J3 DDC EPROM 24C21A Serial EEPROM MPU U14 MTV130P OSD JP1 TO INVERTER JP2 SWITCH MODE POWER SUPPLY 17 LCD PANEL SW BOARD DPWBN5415T8 TC...

Page 17: ...dd vertical line is dark Does picture display Back light On or off A dark picture or a picture full of colored vertical lines Check power LED Check display resoluton Check inverter Check I F board JP1...

Page 18: ...D o e s t h e s c r e e n d i s p l a y Y E S N O display ok YES OSD debug 3 NO solution with no display 2 loss of RGB NO screen shaking CHK LP1 LP12 CHK U1 C2 C4 R2 for PLL NO CHK R83 84 86 L23 YES J...

Page 19: ...o Not Copy No screen handler 2 Back light on YES NO 3 3V OK YES NO START RP 1 RP 6 YES U1 PIN 30 31 OK U17 PIN1 24 34 47 63 77 246 256 YES A CHK CKT SHEET 6 POWER NO NO CHKU1 3 3V2 3 3V3_PLL PIN 29 cl...

Page 20: ...Copy CHK CKT SHEET 6 POWER No screen handler 2 B A CHK U17 LED always ON or always OFF when powering on CHK U14 CKT YES NO CHK SYSTEM POWER CHK U8 OK NG CHK CKT SHEET 2 PANEL CHK U16 if recall functi...

Page 21: ...OSD DEBUG 3 CHK L17 OK CHK U14 PIN33 34 37 38 PUSH KEY SWITCH ViewSonic Corporation 18 Confidential Do Not Copy VE700 1 VA720 2...

Page 22: ...JP2 12V INPUT F3 L20 U9 3 V 3 panel _5v FOR U1 U22 U8 L17 PIN 2 U6 PIN 2 4 3 V 3 FOR U17 CHK SHEET 3 9 6V 25 09V 4 96 1 25 FOR U17 ViewSonic Corporation 19 Confidential Do Not Copy VE700 1 VA720 2...

Page 23: ...KEYBOARD CAB A 3 HINGE CAB A 2 420712 XEPSD40P12000 2 PCS 1 CAB A CAB B 2 420713 XBMSD30P06000 21 PCS 1 INVERTER 2 MAIN 5 SHIELD 10 D SUB 3 CABLE CLIP 1 420715 XBMSD40P08000 4 PCS 1 MHNGM0019 4 42071...

Page 24: ...B 1 PCS 1 I F BOARD FOR VIEW SONIC 17 260002 VRMDNVG 000J A 7 PCS 1 R21 39 55 90 112 116 117 260003 VRMDNVG 000J A 10 PCS 1 R122 124 130 131 132 134 137 138 141 142 260004 VRMDNVG 000J A 5 PCS 1 R148...

Page 25: ...PCS 1 C128 129 130 131 132 133 134 135 136 137 260070 VCLFHN1HG104Z A 7 PCS 1 C140 147 155 156 159 160 161 260071 VCLFHN1HG104Z A 7 PCS 1 C175 176 177 178 188 189 R68 260075 VCICHN1HH101J A 6 PCS 1 C2...

Page 26: ...1 SECOND SOURCE 260139 VSDSS22 A 3 PCS 1 D4 5 7 260139A VSDSS24 A 3 PCS 1 SECOND SOURCE 260139B VSDSK22 A 3 PCS 1 SECOND SOURCE 260139C VSDSK24 A 3 PCS 1 SECOND SOURCE 260139D VSDLYSS32 A 3 PCS 1 SEC...

Page 27: ...EJST 1 PCS 1 J1 MODEL CPWBVE700T8ACED LEVEL NO PARTS CODE QTY UNIT POSITION AND DESCRIPTION 421001 VVLM170ES04 1 SET 1 DUMB PANEL 17 AV 421002 RUNTP5392T8 1 PCS 1 INVERTER 421003 DPWBN5408T8 1 SET 1 I...

Page 28: ...9 EXPLODED DIAGRAM ViewSonic Corporation 25 Confidential Do Not Copy VE700 1 VA720 2...

Page 29: ...HIELD CASE INVERTER BOARD 12 RUBBER LEG 13 D SUB BRACKET 14 DECORATION PLATE 15 SHIELD CASE I F BOARD 16 I F BOARD 17 LCD PANEL 17 18 KENSINGTON BRACKET 19 REAR COVER 20 LOGO COVER 21 HINGE COVER 22 B...

Page 30: ...v L8 BEAD C33 0 01u C14 10p C12 NC C18 NC U2 74LV14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 A1 B1 A2 B2 A3 B3 GND B4 A4 B5 A5 B6 A6 VCC C40 0 1u R3 75 R11 33 R13 2K U4 2421 1 2 3 4 5 6 7 8 NC NC NC GND SDA S...

Page 31: ...3 3V GAVCC C46 100u 25V B1 15uH FL1 NC FL R22 47K C56 0 01u 16V C51 0 47u 16V C47 0 1u 25V 5V1 1 PAD FL2 NC FL FL3 NC FL C55 0 01u 16V C53 0 01u 16V C54 0 47u 16V R21 0 B2 BEAD C50 0 47u 16V B3 BEAD...

Page 32: ...5 2200p R25 0 R28 0 R31 2K C57 1u 25V R32 14 7K 1 L12 47uH R29 0 NMOS Q3 SI3434DV 1 2 3 4 5 6 D D G S D D R37 2 2K 1 C67 1u 50V R41 68K 5 R59 7 5K 1 C89 0 1u C76 0 1u 25V R45 39K 5 R53 10K Q4 2N7002E...

Page 33: ...XOEG 0 7 XOER 0 7 XOOB 0 7 XOOG 0 7 XOOR 0 7 BA5 QB3216C301T4 1 2 3 4 5 6 7 8 CA18 22CP 1 8 2 7 3 6 4 5 BA7 QB3216C301T4 1 2 3 4 5 6 7 8 CA24 22CP 1 8 2 7 3 6 4 5 CA22 22CP 1 8 2 7 3 6 4 5 BA22 QB321...

Page 34: ...XEDINV EPOL XECLK Gate_ON XOEG 0 7 XOER 0 7 XOOB 0 7 XOOG 0 7 XOOR 0 7 XEOB 0 7 XEOR 0 7 XEOG 0 7 XEEB 0 7 XEER 0 7 XEEG 0 7 XOEB 0 7 YVEE_ 4 95V YV1_ 25 09V AVDD_ 9 6V V 3 3V V33T1 1 PAD GATE1 1 PAD...

Page 35: ...100U 16V L19 BEAD C104 0 01u R153 24K C105 470u 16v C113 0 1U C102 0 1u R173 1k R67 10K C103 0 1u C189 0 1U R69 22 JP3 CON4 1 2 3 4 AI5 AI D34 1 U23 SI9435DY 1 2 3 4 5 6 7 8 S S S G D D D D C188 0 1u...

Page 36: ...N13 DATA_SEL B_IN14 B_IN15 B_IN16 B_IN17 ROM_SCL ROM_SDA GND CPU_SDA CPU_SCL PWM_CTL CLK_1M VDD CLK_1M_O RESET_B R_OSD G_OSD B_OSD EN_OSD SCAN_EN TEST_EN VCLK01 FCLK0 VCLK00 FCLK1 VCLK1 HSYNC_O VSYNC_...

Page 37: ...22P C152 22p R101 22 R107 100 L33 BEAD R106 10K C147 0 1u C191 NC Q14 MMBT3904L 1 2 3 D8 1N4148 R102 1M C160 0 1u C155 0 1u R160 2 2K R159 4 7K C190 NC C157 NC C156 0 1u U16 24LC16 1 2 3 4 5 6 7 8 A0...

Page 38: ...192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241...

Page 39: ...11 PCB LAYOUT DIAGRAM ViewSonic Corporation 36 Confidential Do Not Copy VE700 1 VA720 2...

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