ViewSonic VG921m-4 VS11369 User Manual Download

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ViewSonic VG921m-4

Model No. VS11369

19” Color TFT LCD

Display

(VG921m-4_SM Rev. 1a Nov. 2006)

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

Service Manual

Summary of Contents for VG921m-4 VS11369

Page 1: ...ViewSonic VG921m 4 Model No VS11369 19 Color TFT LCD Display VG921m 4_SM Rev 1a Nov 2006 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 Service Manual...

Page 2: ...xpressed 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: ...tices 1 2 Specification 4 3 Front Panel Function Control Description 18 4 Circuit Description 24 5 Adjustment Procedure 31 6 Troubleshooting Flow Chart 55 7 Recommended Spare Parts List 63 8 Exploded...

Page 4: ...structions 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 power cor...

Page 5: ...cover of the monitor DO not touch the surface of the POL Surface of the LCD panel is pressed by fingers and that may cause mura Take out the monitor with cushions Taking out the monitor by grasping th...

Page 6: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 3 The panel is placed facedown the lap that may cause mura...

Page 7: ...s 4 CCFL 50000 Hrs Min 3 mg per lamp 2 INPUT SIGNAL Video Sync RGB Analog 75 ohms 0 7 1 0 Vp p Separate Sync Composite Sync SOG Fh 24 82 kHz Fv 50 75 Hz 3 COMPATIBILITY PC Mac PC Compatibles from VGA...

Page 8: ...lution Notice OSD Position OSD Time Out OSD Background Memory Recall 1 Main Menu 2 Auto Image Adjust Up or Dn Contrast Brightness Up Dn Recall both of Contrast and Brightness to default 1 2 Toggle 720...

Page 9: ...al 1 W 1 W 18 LOGISTICS Container Load 20 40 Pallet Load UPC Code Serial Format EDID Code Country of origin Standard 640 1280 pieces 64 pieces 766907224924 QB9 Byte 10 0 x 1E Byte 11 0 x 30 China 19 W...

Page 10: ...th PC 2001 and Hot Plug Detect DDC Yes Detached cable refer the Appendix A DVI D Cable 1 8m black with PC 2001 No Audio Cable 1 8m black with PC 2001 Yes MIC Cable 1 8m black with PC 2001 No USB Cable...

Page 11: ...utes Video Cable Connector Pin out Refer to Appendix A Compliant DDC 2B Video Signals Video RGB Analog Separate Sync Composite Sync SOG Video Impedance 75 Ohms Analog Maximum PC Video Signal 950 mV wi...

Page 12: ...r Supply Transient Immunity SHALL BE ABLE TO WITHSTAND AN ANSI IEEE C62 41 1980 6000V 200 AMPERE RING WAVE TRANSIENT TEST WITH NO DAMAGE Power Supply Line Surge Immunity Shall be able to withstand 1 5...

Page 13: ...640 x 480 72 Hz 37 9 KHz DMT 8 640 x 480 75 Hz 37 5 KHz DMT 9 720 x 400 70 Hz 31 5 KHz 10 720 x 480 60 Hz 31 5 KHz DTV 11 720 x 576 50 Hz 31 3 KHz DTV 12 800 x 600 56 Hz 35 1 KHz DMT 13 800 x 600 60 H...

Page 14: ...g 3 The image quality of 85Hz mode might be worse than 75Hz Primary Presets 1280x1024 60Hz User Presets Number of User Presets recognized timings Available 10 presets total in FIFO configuration Chang...

Page 15: ...be one shot logic operation i e there should be no cycling Reaction Time OSD must fully appear within 0 5s after pushing Button 1 Short Cuts Function from the button s 1 Main Menu 2 Auto Image Adjust...

Page 16: ...power button is locked If the user presses the power button while it is locked a message will appear on the screen for 3 seconds showing Power Button Locked It also means that with the power button l...

Page 17: ...ults Item Defaults Contrast 70 Input Priority N A Brightness 100 Resolution Notice On Color Temperature 6500K Volume 50 Sharpness 100 Balance N A OSD H Position 50 Treble N A OSD V Position 50 Bass N...

Page 18: ...tness Max 300 cd m2 Typ after 30 minute warm up 240 cd m2 Min after 30 minute warm up Brightness Uniformity 13 points 80 Typ 75 Min Contrast Ratio 700 1 Typ 450 1 Min Color Depth 16 2 million colors 6...

Page 19: ...ntrast 100 Color Temperature 6500K sRGB Lv Def Lv Max x 100 95 Lv sRGB 6500K Condition Brightness Contrast Default CCT 6500K sRGB Lv sRGB 6500K Lv Max x 100 85 Lv 9300K Condition Brightness Contrast D...

Page 20: ...olor Temperatures sRGB It should meet IEC 61966 2 1 1999 10 standard CCT typ 9300K u CCT 0 1888 v CCT 0 4457 CCT max 10250K CCT min 8500K Preset 1 u v 0 01 Full White pattern CCT typ 7500K u CCT 0 193...

Page 21: ...defined in Main Menu Controls on page 10 Main Menu with OSD controls Front Control Panel shown below in detail Scrolls through menu options and adjusts the displayed control Also a shortcut to displa...

Page 22: ...r down T buttons 5 To save the adjustments and exit the menu press button 1 twice The following tips may help you optimize your display Adjust the computer s graphics card so that it outputs a 1280 x...

Page 23: ...temperatures and a User Color mode which allows independent adjustment of red R green G and blue B The factory setting for this product is 6500K 6500 Kelvin sRGB This is quickly becoming the industry...

Page 24: ...ation displays 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...

Page 25: ...rpness adjusts the clarity and focus of the screen image Setup Menu displays the menu shown below Language Select allows the user to choose the language used in the menus and control screens Resolutio...

Page 26: ...time the OSD screen is displayed For example with a 30 second setting if a control is not pushed within 30 seconds the display screen disappears OSD Background allows the user to turn the OSD backgro...

Page 27: ...to load or not B Scaling Controller Overview Realtek RTD2523B series products are all in one LCD monitor controllers support up to SXGA XGA optional and integrate Realtek high performance ADC TMDS Rx...

Page 28: ...ND AG 3 Ground for digital PLL DPLL_VDD AP 4 Power for digital PLL 3 3V APLL_VDD AP 5 Power for multi phase PLL 3 3V PLL_TEST1 AIO 6 Test Pin 1 IRQ PLL_TEST2 AIO 7 Test Pin 2 Power on latch for crysta...

Page 29: ...13 1 2 3 2mA 59 BB3P BB3P NC BBLU 7 BBLU 7 60 BB3N BB3N NC BBLU 6 BBLU 6 61 BB2P BB2P NC BBLU 5 BBLU 5 62 BB2N BB2N NC BBLU 4 BBLU 4 63 BB1P BB1P NC BBLU 3 T0 BBLU 3 64 BB1N BB1N NC BBLU 2 T1 BBLU 2...

Page 30: ...NC ARED 7 T28 ARED 7 104 AR3N TCON 6 NC ARED 6 T29 ARED 6 105 AR2P TCON 5 NC ARED 5 TH ARED 5 106 AR2N TCON 1 NC ARED 4 TV ARED 4 107 AR1P TCON 0 NC ARED 3 TE ARED 3 108 AR1N NC NC ARED 2 TK ARED 2 11...

Page 31: ...Input TMDS_GND G 25 TMDS_VDD P 26 3 3V PWM Interface 3 2 1 pin PWM1 PWM2 can be selected from 1 of 3 possible pins Name I O Pin No Description Note PWM2 TCON 2 S 3 O 51 PWM2 TCON 2 SDIO 3 1 2 3 5 8 PW...

Page 32: ...5K Ohms pull low resistor 5 Schmitt trigger CMOS Input Vt 1 4 2 2V 6 Open Drain Output Drive low Pull high 7 Bi directional input output 8 Programmable driving current 2 10mA 9 TTL output 5V 3 3V 10 4...

Page 33: ...eak to peak The inverter is formed by symmetric in order to drive the separate lamp modules The input stage consists of a PWM controller push pull inverter and switching MOSFET to convert DC input int...

Page 34: ...kHz Yes 5 640 x 480 72Hz 37 9kHz Yes 6 640 x 480 75Hz 37 5kHz Yes 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 72H...

Page 35: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 32...

Page 36: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 33...

Page 37: ...In again 1 1 Equipment Needed VG921M Series Monitor RS232 VGA Cable 1 RS232 DVI Cable 1 AC POWER Cable 1 TEST PC with Windows XP Display Data Channel D8330 DDC Card to plug PC_PCI _Slot DYNACOLOR DDC...

Page 38: ...In for D_DVI 1 2 3 Turn on PC power choose DDC Tester System application run it 1 2 4 Connect AC power RS232 VGA with VG930 Monitor 1 2 5 DDC Key In NOTE Barcode Scanner and Keyboard can plug in Keybo...

Page 39: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 36...

Page 40: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 37...

Page 41: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 38...

Page 42: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 39 1 4 0 DDC Key In Procedure Step 1 select and execute DDC Key In program winDDC exe icon on desktop...

Page 43: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 40 Step 2 Load DDC source file Step2 1 Choose File menu click Model Edit button into model edit dialog...

Page 44: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 41 Step2 2 Press Brower button set current DDC_LOAD_FILE working path...

Page 45: ...Not Copy VG921m 4 42 Step2 3 click working Model select Model in list box Step3 Double click the input barcode icon at the toolbar Key in the serial number or Use Barcode Scanner to scan the barcode o...

Page 46: ...RS232 VGA cable out of the monitor connect the monitor with a computer By the VGA lable Step5 2 open up the my computer attribute dialog box select the hardware option open drive management Below the...

Page 47: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 44 Step4 2Select and click the EDIDW2K EXE file the EDID information will show on the screen...

Page 48: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 45 Setp4 3 Check the DDC...

Page 49: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 46 Packing For Shipping and Disassembly Procedure 1 Take off the cover of the Bracket 2 Pull the four screws which can fix up the Bracket...

Page 50: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 47 3 Take off the three screws from the housing 4 Remove the housing...

Page 51: ...onfidential Do Not Copy VG921m 4 48 5 Take off the Two Speakers 6 Pull off the cables which can fix up the speakers and then pull out the speaker cables 7 tear off the AL foil from the key board and t...

Page 52: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 49 8 Take out the screws from the key board 9 take off the AL foil 4pcs from the lamp cable 10 Unscrew 3 pcs screws from the shield cover...

Page 53: ...ewSonic Corporation Confidential Do Not Copy VG921m 4 50 11 Take out the AL foil which connecter the power board and main board 11 Tear off the aluminum foil from the FFC cable 11 Take off the FCC Cab...

Page 54: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 51 12 Take out the power board connector and lamp wire 13 Unscrew screws from the power board and take off Power board...

Page 55: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 52 14 Unscrew screws from the main board and take off the screws 15 Unscrew the six corner screws 4pcs and then take off the main board...

Page 56: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 53 16 Take off the bezel...

Page 57: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 54 17 Unscrew the screws 4pcs from the frame and then take off the frame...

Page 58: ...rporation Confidential Do Not Copy VG921m 4 55 6 Troubleshooting Flow Chart Main Procedure Start Connect all of devices to the LCD monitor Power On Is indicator LED light A Power Circuit Troubleshooti...

Page 59: ...921m 4 56 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 Troubleshooting E...

Page 60: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 57 A Power Circuit Troubleshooting Start Change AC DC Adapter Retry Power On Change Main Board Retry No Trouble Found End End End...

Page 61: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 58 B Backlight Troubleshooting Start Change Inverter and Retry No Trouble Found End End End End Backlight Change Module Change Main Board Retry...

Page 62: ...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 Board...

Page 63: ...VG921m 4 60 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 Troub...

Page 64: ...ewSonic Corporation Confidential Do Not Copy VG921m 4 61 D Function Troubleshooting Start Control Menu not Functioning Change Control Board and Retry Change Main Board No Trouble Found End No No Yes Y...

Page 65: ...al Do Not Copy VG921m 4 62 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 Troubl...

Page 66: ...00008146 F103015170401 12 Safety Label DC 00008147 F10250619VA06 13 Quick Start Guide DC 00008148 F000417VAK001 14 LCD MODULE 19 HSD190ME13 A16 LVDSHANNSTAR E 00005792 E34862190H303 A 15 Speaker E 00...

Page 67: ...Cover ABS HB BLACK LM MR19V AAAD REV 0 1 39 N A V300800000001 GLUE 50g PES 60 200 0 01 40 N A V5004AP150201 ADHESIVE TAPE L25000 W15 T0 25mm 25m ROLL YW0910300002 0 01 41 N A V5011A5150101 ADHESIVE TA...

Page 68: ...Viewsonic 1 85 N A P704A995LM010 A Front Cover bracket ABS HB BLACK INJECTION LM MR19V ABAD REV 0 1 86 N A P705A995LM050 A Back Cover bracket ABS HB BLACK INJECTION LM MR19V ABAD REV 0 1 87 C 0000818...

Page 69: ...5V 24V 1 14 N A XLM19VA380001 SHIELD ASSY LM MR19V AAAD 1 15 N A M410810130001 VASA BKT T 0 8mm SECC LAUNDER 4 16 N A M632700LM0130 E Fix Plate hinge SECC LAUNDER LM MR19V ABAD REV 0 1 17 N A M632700L...

Page 70: ...1 3 P 00008174 F2014319VA002 POLYETHYLENE R EPS LM MR19V ABA L500 W160 T145mm 1 4 CB 00006504 W0926418AQ951 VGA CABLE 30AWG UL20276 L1800mm 15PIN BLACK 1 5 A 00006505 W402221509531 AC POWER CORD USA S...

Page 71: ...gital DVI Option SCL SDA XIN XOUT 24MH Z 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 TX2 17 panel 19 panel Option DC Power Regulator 5V supply to panel 3 3V Supply C...

Page 72: ...2 3 R4 10K R14 220 Q5 2N3906 1 2 3 R120 220 C10 1uF Q1 AO3401 1 3 2 C70 47uF_16V NC L1FEB 1206 Q6 KST3904 1 2 3 C1 100uF_16V C7 100uF_16V FB1 FEB 1206 JP1 HEADER 13 SM 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5...

Page 73: ...ion LED 1 LED 2 UP DOWN MENU MUTE EXIT POWER MUTE UP DOWN EXIT MENU 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...

Page 74: ...FBA5 BED 6 CNA2 2PIN 2 0mm180 1 2 4 3 CA12 2 2uF_16V RA5 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...

Page 75: ...4 DA4 P5 5 DA5 HSCL2 P5 6 HSDA2 P5 7 RST HDA1 TX P3 1 XTAL2 XTAL1 VSS VCC P1 0 P1 1 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...

Page 76: ...ST2 TCON1 TCON12 APLL_GND VCCK GNDK PVCC PVCC PVCC PVCC PVCC PGND PGND PGND 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...

Page 77: ...10 100nF R40 10K 1 16W R133 10 VGA_R VGA_G VGA_B DGND VGA_R VGA_G VGA_B DGND DDCSDA DDCSCL HSIN VSIN VGA5V 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...

Page 78: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 75 11 PCB Layout Diagrams...

Page 79: ...ViewSonic Corporation Confidential Do Not Copy VG921m 4 76...

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Page 85: ...cuit 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 Diag...

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