ViewSonic va720-1 User Manual Download | Manualshive

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Summary of Contents for va720-1

Page 1: ......

Page 2: ...rvice Manual ViewSonic VA720 1 Model No VLCDS23895 3W 17 Color TFT LCD Display ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 VE175 b 1 VA720 1_SM_542 Rev 1a May 2002 ViewSoni...

Page 3: ...th 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 t...

Page 4: ...NS 3 4 4 EXPLODED VIEW PARTS LIST 5 6 5 BLOCK DIAGRAM 7 6 SCHEMATIC DIAGRAMS 8 15 7 THEORY OF OPERATION 16 8 WIRING DIAGRAM 17 9 PCB LAYOUT 18 23 10 TROUBLE SHOOTING FLOW CHART 24 27 11 ADJUSTMENT 28...

Page 5: ...PRECAUTIONS SAFETY NOTICES 1 PRECAUTION AND NOTICES 1 1 SAFETY PRECAUTIONS 1 2 PRODUCT SAFETY NOTICE 0 1 3 SERVICE NOTES 1 2 3 4 5 6 7 5 ViewSonic Corporation 1 Confidential Do Not Copy VA720 1 VE175...

Page 6: ...2 SERVICE TOOLS EQUIPMENT REQUIRED 2 SERVICE TOOL EQUIPMENT REQUIRED 8 9 1 8 9 9 6 88 9 7 9 9 5 9 8 9 8 25 1 4 ViewSonic Corporation 2 Confidential Do Not Copy VA720 1 VE175 b...

Page 7: ...Do Not Copy VA720 1 VE175 b 3 SPECIFICATIONS 3 1 PRODUCT SPECIFICATIONS 8 A B 9 9 C 1 D 1 E 17 2 3 4 3 1 72 4E 1 72 4 8 3 2 4 0 F 5GH 5G F 5GH 5G HI G 6G 5 F 2 4 1 2 4 15 2 4 F 5 F 66 I1 2 4E 1 67 2...

Page 8: ...9 7 3 7 L 5 0 6 5 0 7 3 7 L 0 65 0 9 3 L 5 0 65 5 0 H H 9 3 L 0 6 I 0 H H I 9 3 L 1 0 7 0 H H 9 3 L 5 0 7 5 0 H H 61 3 17 L 5 0 7I 15 0 1 9 17 3 L 0 7 6 6 0 6 9 17 3 L 0 5 7 0 7 9 17 3 L 1 0 5 6 0 5 9...

Page 9: ...07X2 1F16 X2 1F18 1F27 1F26 V901 1F05 1F17X6 1F09 X4 1F02 1F01 1F19 1F03 1F04 X2 2C03 1F22 1F28 1F23 X2 1F15 X2 X4 1F08 1F21 1F10 1F11 FIG 1 FIG 2 FIG 2 FIG 1 MAIN PCB ASS Y 1F24 1F25 FIG 3 FIG 3 U901...

Page 10: ...4 2 EXPLODED VIEW PARTS LIST ViewSonic Corporation 6 Confidential Do Not Copy VA720 1 VE175 b 0 1 0 1 2 3 43 4...

Page 11: ...02 3 3V INVERTER U901 VGA INPUT P103 P105 DDC I105 ADC I103 CONTROLLER IC I109 Micro CONTROLLER I112 KEY PAD LED PANEL DISPLAY HIGHT VOLTAGE OSC X101 EERROM I119 LVDS INTERFACE I117 I118 12V 5 BLOCK D...

Page 12: ...2 0 1u L102 30UH C109 0 1u R102 20K C101 0 1u Q104 MMBT3904L 1 2 3 I101 LM2596 1 2 3 4 5 VIN SW GND FB SHDN C113 330uF 25v C106 0 1u C103 470uF 25v P101 CON4 1 2 3 4 C114 0 1u R105 20K C104 470uF 25v...

Page 13: ...VDD VDD GND GND VD VD GND COAST HSYNC VSYNC GND FILT PVD PVD GND MIDSCV CLAMP VD GND GND VD BAIN GND VD VD GND GAIN SOGIN GND VD VD GND RAIN A0 SCL SDA REF BYPASS VD GND GND VD GND VSOUT SOGOUT HSOUT...

Page 14: ...104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153...

Page 15: ...S P4 7 VBLANK P4 6 HBLANK X1 X2 P4 5 P4 4 P4 3 P4 2 P4 1 VSYNC P4 0 HSYNC P3 0 Rxd HSCL P3 1 Txd HSDA P3 2 INT0 VDD RST VSS P3 4 T0 P3 5 T1 P6 0 ISCL P6 1 ISDA P1 0 P1 1 P1 2 P1 3 P1 4 P1 5 P1 6 P1 7...

Page 16: ...L126 32R C241 NC L134 NC I116 AV9173 01 1 2 3 4 5 6 7 8 FBIN IN GND FSO OE CLK1 VDD CLK2 C244 10uF 25v L127 200R C245 0 1u C243 22p R185 100 R180 0 R182 NC R183 NC R184 0 R188 0 I115 NC 74HC4053 11 1...

Page 17: ...6 0 1u C252 0 1u C253 0 1u C254 0 1u R191 NC R192 0 P108 CON30 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 I117 SN75LVDS83 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1...

Page 18: ...CON6 1 2 3 4 5 6 1 2 3 4 5 6 R194 1K L132 200R L133 200R C274 22P C275 22P C277 22P C280 22P C281 22P C282 22P C283 22P C284 22P C285 22P C286 22P C287 22P L131 FERRITE C289 22P C290 22P C291 22P C292...

Page 19: ...JUMPER P802 1 2 3 4 5 P803 NC 1 2 3 4 5 6 7 8 9 R840 10 D814 NC C812 100UF 400V C806 0 22UF 630V R805 150K 1W D802 HER157G R806 150K 1W L802 BEAD R804 180K 3W C818 NC D803 UF4004 R816 10 C819 NC C808...

Page 20: ...6 2 2 45 7 6 8 9 3 2 2 3 22 0 1 8 30 2 0 1 3 2 2 2 5 3 66 3 2 2 C Scaling controller 2 53 0 53 0 53 0 2 2 43 2 86 2 2 2 2 2 86 2 2 A34 0 4 1 5 22 2 2 2 5 6 8 8 6 B 5 3A 0 0 0 0 0 53 C 2 3 2 45 2 2 8 2...

Page 21: ...CB J2 J1 J3 P802 P803 P983 P802 LCD PANEL P110 JTVE800 2202509000 VER 0 01 I103 P105 P103 P111 P401 P402 P403 I109 P107 P961 I O CABLE P101 P108 P112 P104 P109 P981 P701 KEYPAD PCB 2202120100V 0 02 P9...

Page 22: ...9 PCB LAYOUT 9 1 MAIN PCB TOP VIEW ViewSonic Corporation 18 Confidential Do Not Copy VA720 1 VE175 b...

Page 23: ...9 2 MAIN PCB BOTTOM VIEW ViewSonic Corporation 19 Confidential Do Not Copy VA720 1 VE175 b...

Page 24: ...9 3 CON PCB TOP VIEW ViewSonic Corporation 20 Confidential Do Not Copy VA720 1 VE175 b...

Page 25: ...9 4 CON PCB BOTTOM VIEW ViewSonic Corporation 21 Confidential Do Not Copy VA720 1 VE175 b...

Page 26: ...9 5 POWER PCB TOP VIEW ViewSonic Corporation 22 Confidential Do Not Copy VA720 1 VE175 b...

Page 27: ...9 6 POWER PCB BOTTOM VIEW ViewSonic Corporation 23 Confidential Do Not Copy VA720 1 VE175 b...

Page 28: ...Start 12V on C103 D111 short Replace it Check C108 C105 I102 Check F801 D810 D811 D812 D813 I801 D804 N Y I101 Pin 1 11V N Check L101 N Y I101 Pin 2 Pulse Y N Check R108 I101 Check Q101 Q102 D101 D111...

Page 29: ...110 N Check 12MHz colok on pin 7 of I112 Y Check X1 N Check IIC pin 31 32 of I112 are high level Y Check Trace heven t open or short TO I114 and I103 N Check AD0 AD1 AD2 AD3 Voltage Pin 33 34 35 36 of...

Page 30: ...N refer to no power Y Check pin 2 3 of P105 N Replace I103 Y Check I O cable N Check VCLKD0 pin 67 of I103 colok Y Check R111 C121 C122 N Check R G B DATA on I109 Check 12M VCLK1 VCLKD0 VCLKD1 N Y Ch...

Page 31: ...19 RP30 R pack soldering N Y I109 poor soldering Lose color R or G or B Y Check P103 Pin 2 4 6 Check your PC or soldering N Y Check L106 107 108 R113 115 117 R112 114 116 Poor soldering N Y I103 fail...

Page 32: ...ADJUSTMENT CONDITIONS AND PRECAUTIONS 11 2 MAIN ADJUSTMENTS 0 1 2 3 41 0 1 11 3 ALIGNMENT PROCEDURES 5 6 7 8 9 9 5 6 8 5 6 8 8 3 28 0 9A 7 4 8 3 4 09A 4 7 7 B C 5 6 ViewSonic Corporation 28 Confident...

Page 33: ...7 5 6 7 B C B C 7 5 6 7 B C B C 7 5 6 D 0 8 D 0 7 7 B C B C 4 2 E E D 7 5 6 0 8 4 5 6 B C B C 0 E E 1 200 9 5 6 0 8 4 5 6 B C B C 0 E E 5A6 7 7 9 F ViewSonic Corporation 29 Confidential Do Not Copy VA...

Page 34: ...2 G 8 4 2 3 H 4 3 H D 08 E E D 08 E E 1 200 9 08 E E 5 6 5 6 5 6 7 4 ViewSonic Corporation 30 Confidential Do Not Copy VA720 1 VE175 b...

Page 35: ...al Do Not Copy VA720 1 VE175 b 12 ELECTRICAL PARTS LIST MAIN P C BOARD 0 1 1 1 2 3 4 5 0 1 1 1 2 3 4 5 0 1 1 1 2 3 4 5 2 67 8 2 0 1 1 1 0 2 0 1 1 1 0 2 0 1 1 1 0 67 8 92 2 2 67 8 2 2 2 67 8 2 2 67 8 2...

Page 36: ...ntial Do Not Copy VA720 1 VE175 b 67 8 67 8 67 8 2 0 1 1 1 0 2 2 67 8 67 8 2 67 8 67 8 67 8 67 8 2 67 8 0 1 1 1 0 2 2 0 1 1 1 2 0 0 1 1 1 0 2 0 1 1 1 0 0 1 1 1 0 2 67 8 2 67 8 2 67 8 2 67 8 2 67 8 2 6...

Page 37: ...8 67 8 67 8 67 8 67 8 67 8 67 8 67 8 2 67 8 67 8 67 8 67 8 67 8 67 8 67 8 67 8 67 8 67 8 2 67 8 67 8 67 8 67 8 67 8 67 8 67 8 67 8 67 8 2 67 8 6 1 0 6 1 6 1 0 0 0 6 1 1 1 0 A 6 1 1 1 0 A 6 1 B 0 9 B10...

Page 38: ...2 1 A 0 1 1 0 6 0 D 0 2 1 A 0 1 1 0 6 0 D 0 2 2 2 1 A 0 1 1 0 2 6 0 D 2 1 A 0 1 1 0 6 0 D 0 2 1 A 0 1 1 0 6 0 D 2 1 A 0 1 1 0 6 0 D 2 1 A 0 1 1 0 6 0 D 2 1 A 0 1 1 0 6 0 D 2 1 A 0 1 1 0 6 0 D 2 1 A 0...

Page 39: ...4 3 8 5 1 1B 6 4 3 8 5 2 1 1B 6 4 3 8 5 1 1B 6 4 3 8 5 1 1B 6 4 3 8 5 1 1B 6 4 3 8 5 1 1B 6 4 3 8 5 2 1 1B 6 4 3 2 8 5 2 1 1B 6 4 3 2 8 5 2 1 1B 6 4 3 2 8 5 2 1 1B 6 4 3 2 8 5 2 1 1B 6 4 3 2 8 5 2 1 1...

Page 40: ...B 2 2 1 3 3 2 8 B 1 3 3 8 B 1 3 3 0 8 B 2 2 1 3 3 2 8 B 2 2 1 3 3 2 8 B 2 1 3 3 8 B 2 1 3 3 8 B 2 2 1 3 3 2 8 B 2 1 3 3 8 B 2 1 3 3 8 B 22 1 3 3 8 B 2 1 3 3 8 B 2 1 3 3 8 B 1 3 3 8 B 1 3 3 8 B 1 3 3 8...

Page 41: ...B 7 B3 1 6 1 6BB 3 2 6 1 1 1 A A B 2 6 1 1 1 1 A 1 2 6 1 1 B 2 B 6 1 1 B 1 2 6 1 1 B 2 6 1 1 B 2 B 6 1 1 B 1 2 6 1 1 B 2 6 1 1 B 2 B 6 1 1 B 1 2 6 1 1 B 2 6 1 1 B 2 B 6 1 1 B 1 2 6 1 1 B 2 1 BB1 1 7...

Page 42: ...720 1 VE175 b 2 6 2 0 2 4 2 OTHERS 2 6 1 6 B 3 0 2 2 6 1 6 1 0 1 6 1 2 6 1 6 1 0 2 2 6 1 6 0 2 6 1B 8B F 6 1 2 2A F 16 6 2 36 1 1 03 I2 0 2 2 36 1 1 03 I2 0 2 1 1 A 3 A9 2 G 2 2 1 1 A 4 G C 6 1 2 1 1...

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