ViewSonic VA503b-1 User Manual Download

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ViewSonic VA503b-1

VA503m-1

Model No. VS11248

15” Color TFT LCD

Display

(VA503b-1_ VA503m-1_SM Rev. 1c Nov. 2006)

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

Service Manual

Summary of Contents for VA503b-1

Page 1: ...ViewSonic VA503b 1 VA503m 1 Model No VS11248 15 Color TFT LCD Display VA503b 1_ VA503m 1_SM Rev 1c Nov 2006 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 Service Manual...

Page 2: ...rranty 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 contents hereof without obl...

Page 3: ...ion 4 3 Front Panel Function Control Description 13 4 Circuit Description 19 5 Adjustment Procedure 26 6 Troubleshooting Flow Chart 50 7 Recommended Spare Parts List 51 8 Exploded Diagram and Exploded...

Page 4: ...e immediately and consult your service technician Always unplug the monitor before cleaning it Clean the cabinet with a clean dry cloth Apply non ammonia based cleaner onto the cloth not directly onto...

Page 5: ...he front cover of the monitor Do not touch the surface of the polarizer Surface of the LCD panel is pressed by fingers and that may cause Mura Take out the monitor with cushions Taking out the monitor...

Page 6: ...on foreign objects That could scratch the surface of the panel or cause Mura Place the monitor on the lap the panel surface must be upwards The panel is placed facedown on the lap That may cause Mura...

Page 7: ...1024 x 768 60Hz Analog 75ohms 0 7 1 0 Vp p Yes Input Signal Digital DVI D No Separate Sync Yes Composite Sync No Sync Compatibility Sync on Green No PC Yes Power Mac Yes Compatibility TV Box NextVisio...

Page 8: ...t Voltage Range 100 TO 240 VAC Input Frequency Range 50 TO 60 HERTZ Short Circuit Protection Output can be shorted without damage Over Current Protection 1 13V_4 5A 5V_1 5A 2 5V_6A 13V_2A Leakage Curr...

Page 9: ...7 640 x 480 75Hz 37 5kHz Yes 8 640 x 480 85Hz 43 27kHz Yes 9 720 x 400 70Hz 31 5kHz Yes 10 800 x 600 56Hz 35 1kHz Yes 11 800 x 600 60Hz 37 9kHz Yes 12 800 x 600 72Hz 48 1kHz Yes 13 800 x 600 75Hz 46 9...

Page 10: ...the screen image stability under any conditions Connector PC99 requirement Audio in Lime Green pantone 577C Cable type length 3 5mm stereo cable 1 8m length Audio DPMS Note There is no guarantee 1 W p...

Page 11: ...1 ms max Panel Defects Please see Panel Quality Specifications 2nd Panel Source AUO M150XN07 v3 Type TN LVDS Active Size 304 128 mm H x 228 096mm V Pixel Arrangement RGB Vertical Stripe Pixel Pitch 0...

Page 12: ...s Tf 11 ms max Panel Defects Please see Panel Quality Specifications 4th Panel Source SVA 150XG04TB Type TN LVDS Active Size 304 1 mm H x 228 1mm V Pixel Arrangement RGB Vertical Stripe Pixel Pitch 0...

Page 13: ...K CCT min 4860K Preset 3 5400K CCT Max 5830K CCT Min 4860K u v 0 01 Full White pattern Preset Color Temperature Each color preset shall be adjustable Red Green and Blue shall be individually controlle...

Page 14: ...Color The reference for the bezel is the silver color VA503m and the midnight gray color VA503b chip provided by ViewSonic Neck Base and Rear Cover Color The reference for the bezel is the black color...

Page 15: ...o input 2 Green video input 3 Blue video input 4 No Connection 5 Ground 6 Red video ground 7 Green video ground 8 Blue video ground 9 5V 10 H V sync ground 11 No connection 12 SDA 13 Horizontal sync C...

Page 16: ...ViewSonic Corporation VA503b 1_ VA503m 1 13 3 Front Panel Function Control Description Confidential Do Not Copy...

Page 17: ...1 and 2 Exit or select the Brightness control 4 To adjust the control press the up or down T buttons 5 To save the adjustments and exit the menu press button 1 twice The following tips may help you o...

Page 18: ...cause the Contrast and Brightness adjustments to be disabled 9300K Adds blue to the screen image for cooler white used in most office settings with fluorescent lighting 6500K Adds red to the screen im...

Page 19: ...s the timing mode video signal input coming from the graphics card in the computer the LCD model number the serial number and the ViewSonic website URL See your graphics card s user guide for instruct...

Page 20: ...elow Resolution Notice advises the optimal resolution to use 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...

Page 21: ...h button 2 recall both of Contrast and Brightness to default 1 2 toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode 1 keep pushing 5 sec White Balance Not shown on user s guide 1 Power...

Page 22: ...ION DESCRIPTION The main board contains panel control logic brightness control logic DDC and DC convert DC circuit and so on Power Board Include adapter inverter Flat Panel and CCFL backlight Main Boa...

Page 23: ...changes the 12v DC of power supply to about 600 800v AC that drives the backlight It mostly consists of starting circuit PWM controller DC changing circuit LC surging circuit output circuit and prote...

Page 24: ...face 4mA driving strength UART transmitter GPIO I O w 5V tolrant 66 DDCA_SDA RS232_RX DDC data for analog interface UART transmitter GPIO Input w 5V tolrant 19 RST Chip reset High reset Input w 5V tol...

Page 25: ...Circuit Diagram ViewSonic Corporation VA503b 1_ VA503m 1 22 Confidential Do Not Copy...

Page 26: ...right channel H bridge PVVCCL 14 15 Power supply for left channel H bridge tied to pins 22 and 23 internally not connected to PVCCR or AVcc PVVCCL 22 23 Power supply for left channel H bridge tied to...

Page 27: ...g an optocoupler to this pin the peak current setpoint is adjusted accordingly to the output power demand Skip cycle occurs when FB falls below Vpin1 3 CS Current sense input This pin senses the prima...

Page 28: ...T External timing resistor 10 2OUT Output 2 3 1IN Positive input for error amplifier 1 11 2DTC Output 2 dead time soft start setting 4 1IN Positive input for error amplifier 2 12 2FBK Error amplifier...

Page 29: ...oceeding White Balance adjustment 1 Adjust of White Balance 1 How to do the Chroma 7120 MEM Channel setting A Reference to chroma 7120 user guide B Use SC key and NEXT key to modify xyY value and use...

Page 30: ...factory window until chroma 7120 indicator reached the value G 100 6 Adjust the BLUE of color1 on factory window until chroma 7120 indicator reached the value B 100 7 Repeat above procedure item 4 5...

Page 31: ...to Channel 10 with up or down arrow on chroma 7120 3 The LCD indicator on chroma 7120 will show x 0 313 0 03 y 0 329 0 03 Y 220 20 cd m2 4 Adjust the RED of color3 on factory window until chroma 7120...

Page 32: ...Signal Pattern or PC with SXGA resolution and a sound card 3 Test Condition Before function test and alignment each LCD Monitor should be warmed up for at least 30 minutes with the following condition...

Page 33: ...able Figure 2 3 Boundary Horizontal Vertical Thickness Horizontal and Vertical position of video should be adjustable to be within the screen frame Figure 3 4 RGB Color Performance RGB Color Intensiti...

Page 34: ...kness Pattern R Color Pattern Figure 4 Figure 3 G Color Pattern Figure 5 B Color Pattern Figure 6 Full White Pattern Figure 7 Dark Screen Pattern Figure 8 ViewSonic Corporation VA503b 1_ VA503m 1 31 C...

Page 35: ...pass test program Fine Tune and Sharpness Test Signal 1024 768 60Hz Test Pattern Line Moire Pattern Check and see if the image has noise and focus performs well Eliminate visual line bar If not readj...

Page 36: ...l Test Pattern liberty Make sure there is audio output Make sure that audio function volume 80 is working without noise and resonance Make sure that the sound of right and left speakers are in balance...

Page 37: ...Fixture VGA Cable P N 42 59901 003 1 Pin 4 11 should be connected to GND PC Personal Computer LPT Cable P N 42 59906 001 1 Firmware Upgrade Program One additional monitor for checking the program exe...

Page 38: ...3 VA903 set to be connected with AC cable and VGA cable Step 2 Execute the MSstar ISP tool Step 3 Click Config button Select the Port Type LPT1 and the Base Addr 0x378 on Communication Setting flame a...

Page 39: ...Dialog will be showed If not the error dialog will be done Step 5 Click Device button Select the PMC25LV010 or SST25VF010 viewed on your set Step 6 Click Read button Select the object bincode on your...

Page 40: ...n Step 8 If the flashing F W has been completed Ok message will be showed on the right TextBox Step 9 Unplug and replug power cord of VA503 VA703 VA903 set and then check the OSD operation and image o...

Page 41: ...by VGA Cable 3 2 2 Connect P1 of Fixture with Printer port of PC by LPT Cable 3 2 3 Plug Power Adapter to Fixture 3 2 4 Connect Power Cord to VA503 VA703 VA903 Monitor 3 2 5 Connect PC to the additio...

Page 42: ...3 3 DDC Key In Procedure Sep1 Select and execute DDc Key In program ViewSonic Corporation VA503b 1_ VA503m 1 39 Confidential Do Not Copy...

Page 43: ...Sep2 Inpute the S N and execute Enter ViewSonic Corporation VA503b 1_ VA503m 1 40 Confidential Do Not Copy...

Page 44: ...ViewSonic Corporation VA503b 1_ VA503m 1 41 Confidential Do Not Copy...

Page 45: ...Sep3 Key the Enter and write the data ViewSonic Corporation VA503b 1_ VA503m 1 42 Confidential Do Not Copy...

Page 46: ...Sep4 If ddc program OK and show data compare ok ViewSonic Corporation VA503b 1_ VA503m 1 43 Confidential Do Not Copy...

Page 47: ...e Key board as showed in the following the picture 9 10 7 Remove the back cover refer to the following picture 11 8 Disassemble the 3 fixed screw in the shield remove the shield as the direction arrow...

Page 48: ...1 3 Show pictures Picture 1 Picture 2 Picture 3 Picture 4 Picture 5 Picture 6 ViewSonic Corporation VA503b 1_ VA503m 1 45 Confidential Do Not Copy...

Page 49: ...Picture 7 Picture 8 Picture 9 Picture 10 Picture 11 Picture 12 ViewSonic Corporation VA503b 1_ VA503m 1 46 Confidential Do Not Copy...

Page 50: ...Picture 13 Picture 14 Picture 15 Picture 16 ViewSonic Corporation VA503b 1_ VA503m 1 47 Confidential Do Not Copy...

Page 51: ...Picture 17 ViewSonic Corporation VA503b 1_ VA503m 1 48 Confidential Do Not Copy...

Page 52: ...cond picture third picture fourth picture fifth picture sixth picture seventh picture eighth picture ninth picture Tenth picture Packing Procedure ViewSonic Corporation VA503b 1_ VA503m 1 49 Confident...

Page 53: ...ViewSonic Corporation VA503b 1_ VA503m 1 50 6 Troubleshooting Flow Chart Confidential Do Not Copy...

Page 54: ...ded on 07 31 06 E 00006653 750GLH50X1732N000V 38 PM25LV010 25SCE Added on 07 31 06 E 00006711 56G1133 63 U402 39 LCD Module HSD150MX17 A02 Added on 10 9 06 E 00008092 750GLH50 X17 31N 000V 40 Integrat...

Page 55: ...Added on 11 13 06 E 00005829 78G 455 1 Y 43 Panel E 00006653 750GLH50X1732N000V 44 MAX810STRG SOT 23 IC Added on 07 3106 E 00006706 56G 643 6 U406 45 PM25LV010 25SCE E 00006711 56G1133 63 U402 46 LCD...

Page 56: ...45G 77 3 TRANSPARENT SHEET 173 27 P 00005643 45G 88606 PE BAG FOR BASE 1 28 P 00005644 45G 88607 PE BAG 1 29 N A 50G 600 1 W WHITE PACKING TAPE 74 30 N A J50G 600 5 HANDLE1 1 31 N A J50G 600 6 HANDLE...

Page 57: ...VA503M 1 60 P 00005817 J44G5001 1 EPS L 1 61 P 00005818 J44G5001 2 EPS R 1 62 P 00008046 J44G5001709 1C CARTON 1 63 DC 00006645 J41G7801709 7B QSG 1 64 DC 00008161 J41G780170914A INSERT CARD 1 65 DC 0...

Page 58: ...5816 45G 88609 EPE COVER 1 31 N A 50G 600 1 W WHITE PACKING TAPE 74 32 N A J50G 600 5 HANDLE1 1 33 N A J50G 600 6 HANDLE2 1 34 N A 52G 1185 MIDDLE TAPE FOR CARTON 10 35 N A 52G 1185 24 TAPE 65 36 N A...

Page 59: ...ber Q ty 68 DC 00006660 J41G7801709 8B QSG 1 69 N A J41G780170914A INSERT CARD 1 70 N A J52G8001 9 NON WOVEN FABRICS 4 71 N A J52G8001 10 NON WOVEN FABRICS 2 72 N A J70G1501709 6A CD MANUAL 1 ViewSoni...

Page 60: ...8 Exploded Diagram and Exploded Parts List ViewSonic Corporation VA503b 1_ VA503m 1 57 Confidential Do Not Copy VA503b...

Page 61: ...731 MYLAR 1 10 N A PWPC1942HV1P POWER BOARD 1 11 N A 52G6025 11582 MYLAR 1 12 N A M1G1730 6120 SCREW 3 13 N A CBPC980KH5VWAP CONVERSION 1 14 N A M1G1730 6120 SCREW 4 15 N A 85G645 1 SHIELD 1 16 N A M1...

Page 62: ...4 9 N A 52G6025 11731 MYLAR 1 10 B 00006463 PWPC1942HV1P POWER BOARD 1 11 N A 52G6025 11582 MYLAR 1 12 N A M1G1730 6120 SCREW 3 13 B 00006490 CBPC980KH5VWAP CONVERSION 1 14 N A M1G1730 6120 SCREW 4 15...

Page 63: ...ViewSonic Corporation VA503b 1_ VA503m 1 60 VA503m Confidential Do Not Copy...

Page 64: ...6120 SCREW 3 13 N A CBPC980KH5VWAP CONVERSION 1 14 N A M1G1730 6120 SCREW 4 15 N A 85G645 1 SHIELD 1 16 N A M1G330 4120 SCREW 1 17 N A 15G5791 1 VESA BRACKET 1 18 N A 34G1878 4Z 1B REAR COVER 1 19 N A...

Page 65: ...KH5VWAP CONVERSION 1 14 N A M1G1730 6120 SCREW 4 15 N A 85G645 1 SHIELD 1 16 N A M1G330 4120 SCREW 1 17 N A 15G5791 1 VESA BRACKET 1 18 N A 34G1878 4Z 1B REAR COVER 1 19 N A 12G808 1 VESA RUBBER 4 20...

Page 66: ...ViewSonic Corporation VA503b 1_ VA503m 1 63 Packing for Shipping VA503b Confidential Do Not Copy...

Page 67: ...CB 00006702 89G 725HAA704 SIGNAL CABLE 1 12 N A 34G1800 4Z B BASE 1 Rev 1a Item ViewSonic P N Ref P N Location Q ty 1 P 00005819 J44G5001709 1A CARTON 1 2 N A 50G 600 2 3 HANDLE1 2 1 3 P 00005642 45G...

Page 68: ...ViewSonic Corporation VA503b 1_ VA503m 1 65 Packing for Shipping VA503m Confidential Do Not Copy...

Page 69: ...E 1 14 N A 34G1800KRB BASE 1 ViewSonic Model Number VS11248 Rev 1a Item ViewSonic P N Ref P N Location Q ty 1 P 00005831 J44G5001709 2A CARTON 1 2 N A 50G 600 2 3 HANDLE1 2 1 3 P 00005642 45G 76 28 V3...

Page 70: ...ation VA503b 1_ VA503m 1 67 9 Block Diagram Flash LCD Interface Scaler TSUM16AK Include ADC OSD MCU etc OSDControl Interface Keypad Crystal 14 318MHZ EEPROM 24C16 D SUB Connector EEPROM 24C02 Confiden...

Page 71: ...1 16W R730 0 1 16W 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 H3 TP H3 TP R 51 1 16W R 51 1 16W R 100 1 16W R 100 1 16W C 1uF 16V C 1uF 16V C710 100uF 25V C710 100uF 25V D 1N4148 D 1N4148 C 4 7uF 16V C 4 7uF...

Page 72: ...1 16W R30 75 1 16W R33 100 1 16W R33 100 1 16W 3 1 2 D3 BAV99 D3 BAV99 3 1 2 D5 BAV70 D5 BAV70 D7 MLL5232B 5 6V D7 MLL5232B 5 6V R36 1K 1 16W R36 1K 1 16W A0 1 A1 2 A2 3 GND 4 SDA 5 SCL 6 WP 7 VCC 8...

Page 73: ...3 120 1 16W C414 0 1uF C414 0 1uF C424 0 1uF C424 0 1uF R475 3 9K 1 16W R475 3 9K 1 16W RIN0P 59 GIN0P 56 SOGIN0 57 BIN0P 54 RIN0N 58 GIN0N 55 BIN0N 53 HSYNC0 63 VSYNC0 64 REXT 51 REFP 62 REFM 61 SDO...

Page 74: ...10W D205 1N4148 Q206 KTC5103L Y U P C203 470uF 25V C211 12pF 3KV Q203 AOU401L 2 1 3 TP2 HVO 1 R214 12K 1 10W C208 0 1uF 25V R232 51K 1 10W R202 220 1 10W R210 47K 1 10W ON OFF R228 1K 1 4W C214 12pF...

Page 75: ...5 CLKBN BA3N PA19 LVA0M PA7 GPOO4 CLKAP FCLKP CLKV GPOO3 STV1 GPOO2 RA3P FB0P GA2P FG1P RA1P FB2P STV2 GA2N FG1N CLKAN FCLKN RA2N FB1N RA1N FB2N BA1N FR2N BA3P FR0P OE GPOO4 LP GPOO1 FG0N GA3N GA1N FG...

Page 76: ...7 9 11 13 CN202 pin header2 7 2mm female CN202 pin header2 7 2mm female 1 4 5 2 3 CN201 PHONEJACK CN201 PHONEJACK R207 1K R207 1K C213 0 1uF C213 0 1uF C201 680uF 25V C201 680uF 25V R210 20K 1 16W R2...

Page 77: ...LED_Y LED_G KEY_AUTO KEY_LEFT A_GND GND A_GND GND GND A_GND 1 2 CN4 SPK L CN4 SPK L C01 100pF C01 100pF 2 4 6 8 10 12 1 3 5 7 9 11 CN001 CONN CN001 CONN 1 2 CN3 SPK R CN3 SPK R SW4 KEY_LEFT SW4 KEY_L...

Page 78: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 75 11 PCB Layout Diagram...

Page 79: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 76...

Page 80: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 77 MAIN BOARD PCB BUTTON VIEW...

Page 81: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 78 POWER PCB VIEW...

Page 82: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 79...

Page 83: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 80 KEYBOARD TOP VIEW KEYBOARD BUTTON VIEW AUDIO PCB TOP VIEW...

Page 84: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 81 AUDIO PCB BUTTON VIEW AUDIO PCB TOP VIEW...

Page 85: ...djustment Procedure 6 Troubleshooting Flow Chart 7 Recommended Spare Parts List 8 Exploded Diagram and Exploded Parts List 9 Block Diagrams 10 Schematic Diagrams 11 PCB Layout Diagrams B Are you satis...

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