ViewSonic VA903b-3 VS11372 Service Manual Download Page 52

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ViewSonic Corporation

Confidential - Do Not Copy

VA903b-1_ VA903m-1

A. Power Circuit Troubleshooting

Start

Change AC/

DC Adapter

Retry Power

Change Main

Board & Retry

No Trouble Found

End

Summary of Contents for VA903b-3 VS11372

Page 1: ...ViewSonic VA903b 3 VA903m 3 Model No VS11372 19 Color TFT LCD Display VA903b 1_ VA903m 1_SM Rev 1a Sep 2006 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 Service Manual...

Page 2: ...er 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 rev...

Page 3: ...ty Notices 1 2 Specification 4 3 Front Panel Function Control Description 13 4 Circuit Description 16 5 Adjustment Procedure 23 6 Troubleshooting Flow Chart 47 7 Recommended Spare Parts List 55 8 Expl...

Page 4: ...nd instructions that accompany the monitor 8 Please pay special attention to power supply overloads as electrical shock or fire may occur 9 Do not place anything on the power cord Do not hang the powe...

Page 5: ...ds Incorrect methods Only touch the metal frame of the LCD panel or the front cover of the monitor DO not touch the surface Surface of the LCD panel is pressed by fingers and that may cause mura of th...

Page 6: ...Do Not Copy VA903b 1_ VA903m 1 3 Place the monitor on a clean and soft foam pad Placing the monitor on a foreign objects that could scratch The surface of the Panel or cause mura The panel is placed f...

Page 7: ...Yes Compatibility TV Box NextVision 6 Yes Power Voltage AC 100 240V 50 60Hz Yes On Mode Max Typ Under 36 W in max 32W IN TYP Power Consumption Active Off Mode Max Saving mode 2W Off mode 1 W Tilt 5 22...

Page 8: ...Input Signal Analog Sync Compatibility Separate Audio 1 W 15 distortion For VA903m 3 only Adapter No Power Cable Refer to Appendix D Analog Cable 1 8 m color black with PC 2001 and Hot Plug Detect DDC...

Page 9: ...bility Separate Sync Video Compatibility Shall be compatible with all PC type computers Macintosh computers and after market video cards Resolution Compatibility 640 x 350 640 x 480 720 x 400 640 x 40...

Page 10: ...DIN EN27779 1991 Noise measurements of machines acoustics Power Switch noise shall not be considered US Type Power Cable Length 1 8m Connects to AC DC Power Color Black Power Saving Operation Method V...

Page 11: ...ing not in the list it should display as normal or show on OUT OF RANGE OSD message without blanking 3 The image quality of 85Hz mode might be worse than 75Hz Primary Presets 1280 x 1024 60Hz User Pre...

Page 12: ...GUARANTEE 1 W POWER CONSUMPTION IN ACTIVE OFF MODE WHEN THE AUDIO CABLE IS CONNECTED TFT LCD PANEL 1st Panel Source HSD 190ME13 A16 A10 Type TN LVDS Active Size 376 32 mm H x 301 056mm V Pixel Arrange...

Page 13: ...x x 100 85 Lv 9300K Condition Brightness Contrast Default CCT 9300K Lv 9300K Lv Max x 100 70 Lv 5400K Condition Brightness Contrast Default CCT 5400K Lv 5400K Lv Max x 100 75 Lv Brightness Condition C...

Page 14: ...CT 0 2044 v CCT 0 4808 CCT max 6185K CCT min 4935K Preset 3 u v 0 01 Full White pattern Preset Color Temperature Each color preset shall be adjustable Red Green and Blue shall be individually controll...

Page 15: ...ight adjust to the bottom 429mm Depth 210mm Monitor Weight 4 6KG 10 12lb Refer to Figure 1 Dimension Head Only Wall Mount Width 416mm Height 364mm Depth 68mm Monitor Weight 4 2KG 9 25lb Refer to Figur...

Page 16: ...ote Power Button Button 1 and Button 2 must be one shot logic operation i e there should be no cycling Reaction Time OSD must fully appear within 0 5s after pushing 1 Main Menu Controls Auto Image Adj...

Page 17: ...back On when power is restored after a power failure If the power button is not in the locked mode then power should return to it s previous state when power is restored after a power failure The pow...

Page 18: ...80x768 60 75 85Hz 1024x768 60 75 85Hz N A AUDIO INTERFACE SPEAKER SPECIFICATION For VA903m 3 only Line input connection 3 5 mm stereo jack Line input signal 1 0Vrms Line input impedance 10 kOhm Maximu...

Page 19: ...in one LCD monitor controllers support up to SXGA XGA optional and integrate Realtek high performance ADC TMDS Rx optional scaling engine OSD engine LVDS TX RSDS TX and so on Moreover all products are...

Page 20: ...l Interface 7 pins Name I O Pin No Description Note SDIO 0 IO 54 Serial control I F data in Parallel port data 0 2 3 2mA SDIO 1 TCON 4 BBLU 0 IO 53 Parallel port data 1 TCON 4 TTL BBLU 0 1 2 3 2mA SDI...

Page 21: ...BGRN 4 75 BG1P BG1P TOCLKP BGRN 3 T6 BGRN 3 76 BG1N BG1N TOCLKN BGRN 2 T7 BGRN 2 77 BR3P BR3P TOCP BRED 7 T8 BRED 7 78 BR3N BR3N TOCN BRED 6 T9 BRED 6 79 BR2P BR2P TOBP BRED 5 T10 BRED 5 80 BR2N BR2N...

Page 22: ...V 2 BRED 0 TCON 9 1 7 8 117 TCON 8 V 3 V 3 V 3 AGRN 1 TCON 8 1 7 8 118 TCON 7 V 4 V 4 V 4 AGRN 0 TCON 7 1 7 8 119 TCON 6 V 5 V 5 V 5 DHS DHS 1 7 8 122 TCON 5 V 6 V 6 V 6 DVS DVS 1 7 8 123 TCON 1 V 7 V...

Page 23: ...serial parallel port 2 7 8 PWM1 DDCSDA TCON 1 BBLU 0 IO 47 PWM1 DDC serial control I F data input output TCON 4 1 2 3 5 8 PWM1 DDCSDA2 HDCP TCON 7 IO 125 PWM1 DDC serial control I F data input output...

Page 24: ...4K byte internal program Flash ROM memory in 44 pin PLCC package FEATURES 8051 core 12MHz operating frequency with single double CPU clock option 0 35um process 3 3V power supply 768 byte RAM 64K byte...

Page 25: ...oost AC output up to hundreds of voltage peak to peak And one resister is serial to lamp for output voltage feedback There are two signals which control the inverter come from system to turn on the in...

Page 26: ...7 640 x 480 85Hz 43 27kHz Yes 8 720 x 400 70Hz 31 5kHz Yes 9 800 x 600 56Hz 35 1kHz Yes 10 800 x 600 60Hz 37 9kHz Yes 11 800 x 600 72Hz 48 1kHz Yes 12 800 x 600 75Hz 46 9kHz Yes 13 800 x 600 85Hz 53...

Page 27: ...ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 24...

Page 28: ...ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 25...

Page 29: ...de in TE for firmware upgrade 1 Power adapter for firmware upgrade this adapter is made in TE 1 A computer with Windows XP VA903m b monitor no firmware a additional monitor for system display ISP ISP3...

Page 30: ...by LPT cable 2 2 2 Connect PO2 of ISP fixture with USB port of computer by USB cable 2 2 3 Connect PO3 of ISP fixture with monitor VGA port by VGA cable 2 2 4 Connect mouse keyboard AC power monitor...

Page 31: ...ial Do Not Copy VA903b 1_ VA903m 1 28 PO2 to USB cable PO1 to LPT cable PO3 to VGA cable jumper AC JACK DC_IN port VGA port NOTE Do STEP2 2 6 and STEP2 2 7 for monitor s main board only Monitor firmwa...

Page 32: ...iewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 29 2 3 Soft install Install ISP3 0 program by selecting and clicking isp3 0 setup exe press YES or NEXT buttons until setup is complete...

Page 33: ...ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 30...

Page 34: ...ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 31...

Page 35: ...ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 32 Installation will create a icon for ISP application in START MENU PROGRAM Press finish button exit setup...

Page 36: ...ther the connection between main board is in well condition see attached file 1 1 1 2 per the product model choose the corresponding Model DCC written process the model mr171 AAA should apply the SIP...

Page 37: ...STEP2 Creat security file Choose the Tab create Security File to enter next Dialogue Item ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 34...

Page 38: ...ameter save them and take up the next step STEP4 Choose the Tab MTV TYPE Choose the MTV512M64 from the TAB ISP ITEMS DCC Written model Diagram Table as below ViewSonic Corporation Confidential Do Not...

Page 39: ...STEP5 DCC WRITTEN methods ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 36...

Page 40: ...the Tab LOAD MCU FILE Looking up the related BIOS document in my Computer and Point the confirm Tab when the BIOS Documents loading is successful you can find the picture as above ViewSonic Corporati...

Page 41: ...a comply to the bios DCC written if there is no problem pls press the run menu to write If showed the picture as above pls check whether the DDC write fixture is well Connected with PC the power board...

Page 42: ...The normal program is writing The program has finished writing ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 39...

Page 43: ...Disassembly Procedure 1 Remove the hinge cover 2 Unscrew the back cover s screw 3 open the back cover pull out the speaker wire ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 40...

Page 44: ...ht 5 Tear off the aluminum foil where cover the FFC cable take out the key board from bezel pull out FFC cable from the main board 6 pull out the two pcs screw form the main board ViewSonic Corporatio...

Page 45: ...where lie in the two sides of the frame 8 pull out the screws which fix up the bezel and then take out the bezel 9 Take out the screw which covers the shield ViewSonic Corporation Confidential Do Not...

Page 46: ...al 11 take out the screw form the power board pull out the power boards connecter wire 12 take out the FCC Cable AL where lies in the panel pull out the FCC cable ViewSonic Corporation Confidential Do...

Page 47: ...13 take out the main board s screw 14 Remove the fame down towards ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 44...

Page 48: ...to protect the monitor screen Figure 1 1 2 Put the monitor in the PE bag and seal bag with type Figure 2 1 3 Put the cushions on the monitor Figure 4 tape tape Production film ViewSonic Corporation Co...

Page 49: ...the base on the cushions as figure 1 4 Place the monitor into the carton and then put all accessories into carton At last close the carton Use s Guide Base signal cord Power cord ViewSonic Corporation...

Page 50: ...tion Confidential Do Not Copy VA903b 1_ VA903m 1 47 6 Troubleshooting Flow Chart Main Procedure Start Connect all of devices to the LCD monitor Power On Is indicator LED light A Power Circuit Troubles...

Page 51: ...1_ VA903m 1 48 Is backlight on Display Performance O K Function Adjustment O K Audio Function O K No Trouble Found End B Backlight Troubleshooting C Performance Troubleshooting D Function Troubleshoot...

Page 52: ...ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 49 A Power Circuit Troubleshooting Start Change AC DC Adapter Retry Power On Change Main Board Retry No Trouble Found End End End...

Page 53: ...onic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 50 B Backlight Troubleshooting Start Change Inverter and Retry No Trouble Found End End End End Backlight Change Module Change Main Board R...

Page 54: ...ering Change VGA Cable Change Main Board Bad Uniformity Is screen white NO NO Screen is scrolling LCD Line Defect Change Inverter Board Change LCD Module Change LCD Module Check Connector Change Main...

Page 55: ...b 1_ VA903m 1 52 2 Screen with noise or line bar Prss Reset Button from front panel control End Change Main Board Screen is smaller Make sure relution is set at default Reset O K Change Main Board No...

Page 56: ...ic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 53 D Function Troubleshooting Start Control Menu not Functioning Change Control Board and Retry Change Main Board No Trouble Found End No No...

Page 57: ...Not Copy VA903b 1_ VA903m 1 54 E Audio Troubleshooting Start Make sure sound output Audio cable is OK No Sound Change Speaker Change Speaker Change Main Board Sound is broken Volume Unadjustable No T...

Page 58: ...N ECR approved by ViewSonic Corporation This is to eliminate repeated cross checks of each item between this version and prior versions Electronic Components Cables Craft Box P 00008073 Rev 1b Item EC...

Page 59: ...ck Cover ABS HB BLACK Shoot shaping LM MR17I AAA REV 0 1 37 N A V5004AP150201 ADHESIVE TAPE L25000 W15 T0 25mm 25m ROLL YW0910300002 0 01 38 N A V900505020003 AL FOIL L50 W30 T0 10mm 1 39 N A V9005050...

Page 60: ...502F30111 RES CHIP 15K 1 F 1 16 0603 TAPPING SMD 3 98 N A R072001J30111 RES CHIP 2K 5 J 1 16W 0603 TAPPING SMD Y180222001J0 8 99 N A R072200J20111 05 RESISTOR RES CHIP 220 5 J 1 8W 0603 TAPPING SMD 1...

Page 61: ...AWG UL20276 L1800mm 15PIN black 1 42 A 00008026 W402091809531 AC POWER CORD USA size RVV 300 500V 3G S0 75mm2 L180cm BLACK YISHENG 1 43 CB 00008033 W47A103015003 AC POWER CORD UL 22AWG L150cm BLACK YI...

Page 62: ...4701J20112 RES ARRAY 4 7K 5 J 1 10W 8P4R 3216 TAPPING SMD 6 98 N A T00T390402G01 TR GMBT3904 SOT 23 GTM SMD 3 99 N A T00T390602G01 TR GMBT3906 SOT 23 GTM SMD 4 100 N A T01A340102A21 XSTR AO3401 ST3401...

Page 63: ...ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 60 8 Exploded Diagram and Exploded Parts List...

Page 64: ...24V 5V LM 17 19 LCD MONITOR FOR VIEWSONIC 1 12 N A M105244006401 MECHENICAL SCREW WITH NI 1 13 N A P369579010001 MYLAR L95 W79 5 T0 1mm WHITH ADHESIVE 1 14 N A M711200LM0130 A Shield SPTE LM MR17I AAA...

Page 65: ...HENICAL SCREW WITH NI 1 13 N A P369579010001 MYLAR L95 W79 5 T0 1mm WHITH ADHESIVE 1 14 N A M711200LM0130 A Shield SPTE LM MR17I AAA REV 1 15 N A P612012010001 RUBBER FOOT ROUND 12 T2mm BLACK 6 16 N A...

Page 66: ...ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 63 PACKING FOR SHIPPING...

Page 67: ...06583 XLM171A280003 BASE ASSY LM MR17I AAA BASE RUBBER Midnight Gray 1 PACKING PARTS LIST VA903b 3 ViewSonic Model Number VS11372 Rev 1a Item ViewSonic P N Ref P N Description Q ty 1 N A F300270000037...

Page 68: ...00006505 W402221509531 AC POWER CORD US Spec 22AWG L150cm BLACK 1 6 CB 00005758 W0026918A0142 AUDIO CABIE 26AWG UL2547 L 1800mm 6C BLACK 1 7 N A W0926417AQ951 VGA CABLE 30AWG UL20276 L1800mm 15PIN Bla...

Page 69: ...HZ LVD S Tran smitt er Switch A03401 Realtek RTD2523B RTD2023L 3 3V Digital DVI SCL SDA Down Auto Right XIN XOUT 24MHZ PHD PCLK PHS PVS RE 7 0 RO 7 0 GE 7 0 GO 7 0 BE 7 0 BO 7 0 TX0 TX0 TX1 TX1 TX2 TX...

Page 70: ...100uF_16V C1 100uF_16V JP1 HEADER 13 SM 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 R121 220 C6 100uF_16V R123 220 R117 220 C11 100nF R118 220 C8 100nF R10 330 R127 1K R126 1K CN1 2 0_11pin 1 2 3 4 5 6...

Page 71: ...U DGND JP4 HEADER 13 SM 6 5 4 3 2 1 6 5 4 3 2 1 LED1 A1 C A2 JP3 HEADER 13 SM 6 5 4 3 2 1 6 5 4 3 2 1 SW3 1 2 3 4 SW6 1 2 3 4 SW5 1 2 3 4 SW4 1 2 3 4 SW2 1 2 3 4 JP5 HEADER 13 SM 1 2 3 4 5 6 7 8 9 10...

Page 72: ...A5 47K FBA8 BED 6 RA8 NC 1R2 CA3 10uF_16V FBA2 FEB 1206 CA6 NC 180PF UA1 APA2065 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ROUT SHUTDOWN RIN GND GND VOLUME LOUT LIN VDD LOUT BYPASS GND GND SE BTL ROUT VD...

Page 73: ...P1 2 P1 3 P1 4 P1 5 P1 6 P1 7 NC VSYNC NC P6 0 AD0 P6 1 AD1 P6 2 AD2 P6 3 AD3 P6 4 P6 5 P6 6 CLK0 P6 7 HCL1 RX P3 0 P3 2 INT0 P3 3 INT1 P3 4 T0 P3 5 T1 P7 6 CLKO P7 7 NC R152 6 8K C125 10pF R149 100...

Page 74: ...DGND DGND U1 VGA_CON15 1 2 3 4 5 6 7 8 9 10 12 13 14 15 11 R27 100 D2 BAV99 3 1 2 R18 100 D18 BAV99 3 1 2 D17 MLL5232B 5 6V D4 UDZ5 6B C12 47nF C105 100nF R28 75 D14 LL5232B 5 6V 5 D9 UDZ5 6B R134 10...

Page 75: ...PGND PGND DDCSCL1 TCON4 DDCSDA1 TCON9 SCLK TCON3 SDIO 3 TCON0 SDIO 2 TCON11 SDIO 1 TCON7 SDIO 0 TCON13 PWM1 TCON0 COUT BJT_B BB3P BBLU7 BB3N BBLU6 BB2P BBLU5 BB2N BBLU4 BB1P BBLU3 BB1N BBLU2 BCLKP BGR...

Page 76: ...Model Title Date Rev ViewSonic Corporation TOP 11 PCB Layout Diagrams ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 72...

Page 77: ...Model Title Date Rev ViewSonic Corporation BOTTOM ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 73...

Page 78: ...Model Title Date Rev ViewSonic Corporation DRILL DRAWING ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 74...

Page 79: ...Model Title Date Rev ViewSonic Corporation MASK TOP ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 75...

Page 80: ...Model Title Date Rev ViewSonic Corporation MASK BOTTOM ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 76...

Page 81: ...Model Title Date Rev ViewSonic Corporation SMD TOP ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 77...

Page 82: ...Model Title Date Rev ViewSonic Corporation SILKSCREEN BOTTOM ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 78...

Page 83: ...Model Title Date Rev ViewSonic Corporation SILKSCREEN TOP ViewSonic Corporation Confidential Do Not Copy VA903b 1_ VA903m 1 79...

Page 84: ...4 Circuit Description 5 Adjustment 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...

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