ViewSonic VG2427WM - 24" LCD Monitor User Manual Download

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ViewSonic VG2427wm

Model No. VSXXXXX

23.6” Color TFT LCD Display

(VG2427wm_SM Rev. 1a Mar. 2009)

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

Service Manual

Summary of Contents for VG2427WM - 24" LCD Monitor

Page 1: ...ViewSonic VG2427wm Model No VSXXXXX 23 6 Color TFT LCD Display VG2427wm_SM Rev 1a Mar 2009 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 Service Manual...

Page 2: ...r 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 obligation of ViewSonic to notify any pers...

Page 3: ...unction Control Description 8 4 Circuit Description 13 5 Adjusting Procedure 24 6 Trouble Shooting Flow Chart 32 7 Block Diagrams 33 8 Schematic Diagrams 35 9 PCB Layout Diagrams 44 10 Exploded Diagra...

Page 4: ...wer cable 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 direc...

Page 5: ...ouch the metal frame of the LCD panel or the 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 mo...

Page 6: ...soft foam pad Placing the monitor 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 faced...

Page 7: ...7 2 Specification...

Page 8: ...ontrol Description Use the buttons on the front control panel to display and adjust the OSD controls which display on the screen The OSD controls are explained at the top of the next page and are defi...

Page 9: ...down 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 1920 x 108...

Page 10: ...endent 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 standard for color management with support being incl...

Page 11: ...Vertical Position moves the screen image left or right and up or down H Size Horizontal Size adjusts the width of the screen image Fine Tune sharpens the focus by aligning text and or graphics with p...

Page 12: ...displayed For example with a 15 second setting if a control is not pushed within 15 seconds the display screen disappears OSD Background allows the user to turn the OSD background On or Off Memory Re...

Page 13: ...frequencies up to 188MHz 190Mhz suitable for LCD monitor up to 1680x1050 1920x1080 resolution The NT68667 also has a built in noise reduction function to provide more stable video quality spread spec...

Page 14: ...14 Pin Assignment...

Page 15: ...15...

Page 16: ...16...

Page 17: ...17...

Page 18: ...is specifically designed to provide well regulated supply for low voltage IC applications such as high speed bus termination and low current 3 3V logic supply AP1117 is also well suited for other appl...

Page 19: ...10uF capacitor 0 15 ESR 20 must be connected from this pin to ground to insure stability Vin I 3 The input pin of regulator Typically a large storage capacitor 0 15 ESR 20 is connected from this pin t...

Page 20: ...ost The LD7576X series features near lossless high voltage startup circuit green mode power saving operation leading edge blanking of the current sensing and internal slope compensation They also cons...

Page 21: ...pin in UC384X By connecting a photo coupler to close the control loop and achieve the regulation A high quality ceramic capacitor X7R is required for general applications 102pF at least 3 CS Current s...

Page 22: ...ncy operation The controller provides a soft start operation current and voltage regulation overvoltage and over current protection high drive capability The control logic provides a regulated ignitio...

Page 23: ...g Resistor for Striking Frequency 5 GNDA Signal Ground 6 O PDR2 High Side Driver Output 2 7 GNDP Power Ground 8 O NDR2 Low Side Driver Output 2 9 O NDR1 Low Side Driver Output 1 10 O PDR1 High Side Dr...

Page 24: ...the monitor then press 1 and power button at the same time to enter factory mode Gain adjustment Move cursor to Factory and press 2 key Move cursor to Auto Level and press 2 key to adjust Gain and Off...

Page 25: ...ress 1 key to save adjust value and exit Turn the POWER button off to on to quit from factory mode and reset the monitor Max Brightness measurement 250 cd m2 Test conditions a Switch to the full white...

Page 26: ...26 Hardware Connect status 5 2 2 Update the NOVATEK S firmware You should jump the pin to For Flash at ISP Board LPT Cable VGA Cable Connect to the PC LPT Connect to the VSC VA2427wm...

Page 27: ...27 Double click Writer exe This tool can auto detect the right SCALAR programe speed the process as follow...

Page 28: ...ed click Load Hex then chosse the firmware that you want to update Click Auto then the update will begin Wait for a moment until the bar is 100 the program windows will show Programing Success This me...

Page 29: ...o do the DDC key in 5 3 1 Equipment Needed VG2427wm PC Personal computer LPT cable 12V DC Firmware upgrade program DDC Card 5 3 2 Install software You must install the at the first Note After installa...

Page 30: ...30 For analog a Double click appear as follow Figs b Click c Key in the Serial Number printed on the barcode label then click OK...

Page 31: ...31 d Unit appears the following Fig writer completed 12 codes for example R3V080100001...

Page 32: ...32 6 Troubleshooting Flow Chart...

Page 33: ...e MCU ADC OSD U401 D Sub Connector CN101 EEPROM PM25LV020 100SCE U402 DVI_SCL DVI_SDA LCD Interface CN302 Key Control interface CN404 Crystal 12MHz X401 DVI Connector CN102 EEPROM M24C02 U108 EEPROM M...

Page 34: ...rcuit R904 R905 R906 PWM Control IC LD7576 Transformer AC input 16V ON OFF Control Feedback Circuit Transformer MOSFET Lamp ON OFF 5V Bridge Rectifier and Filter Feedback Circuit Rectifier diodes CN90...

Page 35: ...4 NC DDC1_SDA 5 DSUB_SCL VGA_B DSUB_SDA DVI_SCL DVI_SDA U107 3 1 2 D103 BAV70 R147 100R 1 16W 5 R151 4K7 1 16W 5 R149 4K7 1 16W 5 ADD 20081225 DDC_WP 5 DSUB_5V 5VCC R148 4K7 1 16W 5 C121 0 22uF16V DSU...

Page 36: ...LVBCKP R305 10K 1 16W 5 RXO0 LVB0P RXE2 LVA2M RXO0 LVB0M C304 0 1UF 16V LED_LF_BLUE C305 100UF25V PANEL_VCC LVBCKM RXOC RXO3 LVB3M LVA0P RXE0 RXE3 LVA3M LVB2M RXO2 RXO1 LVB1M R306 56K 1 16W 5 Q301 AO3...

Page 37: ...uF R447 R711 NC use Pin 39 control BL_ON on_BACKLIGHT_5V_1 R447 0 Ohm R711 10K R446 R708 R704 R702 Q701 C702 NC ADD R711 LG 20081029 5VCC VCC3 3 R711 NC 5VCC R704 22K 1 16W 5 Q701 2N3904S RTK PS R702...

Page 38: ...ND CGND 97 DGND CGND 96 DGND CGND 95 DGND CGND 94 DGND CGND 93 DGND CGND 92 DGND CGND 91 DVDD 90 DGND CGND 89 RSGB1M T0M 88 RSGB1P T0P 87 RSCLKBM T1M 86 RSCLKBP T1P 85 RSBB3M T2M 84 RSBB3P T2P 83 RSBB...

Page 39: ...L Size Rev Date Sheet of TPV MODEL PCB NAME T P V Top Victory Electronics Co Ltd Key Component C Custom 3 4 Saturday Nov ember 15 2008 715G2824 C 5 ODM MODEL 03 POWER G2824 C 5 X 3 081111 R914 0 39 OH...

Page 40: ...2 4 3 L802 L R811 82K1 10W R810 100K 1 10W 1 R838 1M 1 10W 5 R842 10K 1 10W 5 3 1 2 D803 BAV99 LV1 LV4 LV2 LV3 LV1 LV3 LV2 LV4 D801 IN4148 C801 0 047uF C802 0 047uF R803 5K1 1 8W 5 R804 5K1 1 8W 5 OEM...

Page 41: ...Victory Electronics Co Ltd Key Component C Custom 4 4 Saturday Nov ember 15 2008 715G2824 C 5 ODM MODEL 04 AUDIO G2824 C 5 X 3 081111 ROUT C612 0 1uF 16V R609 10K 1 10W 5 LOUT ROUT C604 100uF 25V R60...

Page 42: ...W UP DOWN DOWN 1 2 3 4 5 6 CN001 CABLE GND R002 3K 1 10W 1 D101 UDZSNP5 6B KEY2 KEY1 R003 2K OHM 1 1 10W R004 2K OHM 1 1 10W OEM MODEL Size Rev Date Sheet of TPV MODEL PCB NAME T P V Top Victory Elect...

Page 43: ...7 0 1uF 16V C748 0 1uF 16V VSS 1 VOUT 2 VIN 3 U705 AP1117E33LA FB705 NC C749 47uF 25V USB5V C717 0 1uF 16V USB5V 1 2 t F702 PTCR R726 15K 1 16W 5 OCS2 R725 10K 1 16W 5 IN 1 OUT 2 GND 3 FB 4 ON OFF 5 U...

Page 44: ...44 9 PCB Layout Diagrams 9 1 Main Board...

Page 45: ...45...

Page 46: ...46 9 2 Power Board...

Page 47: ...47...

Page 48: ...48 9 3 Key Board 9 3 USB Board...

Page 49: ...49...

Page 50: ...50 10 Exploded Diagram and Exploded Parts List 10 1 EPL...

Page 51: ...6H1111N0VS 1 6 POWER BOARD PWPC9D41MQWU 1 7 MAIN BOARD CBPCRNDVSQ1 756GQ8CB VV071 1 8 SPEAKERS 078G 311 20 G 1 9 MAIN FRAME A15G0489301 1 10 SHIELD AC A85G0133101 1 11 REAR COVER A34G0936 KR 3B0100 1...

Page 52: ...y 1 Signal cable 089G 728CAA DB 1 2 Audio cable 089G 17356X553 1 3 DVI cable 089G1748HAA AC 1 4 Power cable 089G402A18N IS 1 5 EPS top Q44GD020101 1 6 LCD Monitor 1 7 Manual Q70G2401709 3A 1 8 EPS bot...

Page 53: ...1800MM A B E08902 089G 728CAA DB D SUB CABLE E08902 089G 728HAA DB D SUB CABLE 2nd source E08903 089G1748CAA AC SIGNAL CABLE DVI COMLINK 2nd source E08903 089G1748HAA AC DVI CABLE 089G402A18N IS POWE...

Page 54: ...05 056G 662502 IC ESD AZC199 04S SOT23 6L U104 056G 662502 IC ESD AZC199 04S SOT23 6L U103 056G 662502 IC ESD AZC199 04S SOT23 6L U102 056G1133 34 M24C02 WMN6TP U402 056G1133 90 1 IC PM25LV020 100SCE...

Page 55: ...RST CHIPR 100 OHM 5 1 16W R705 061G0402102 RST CHIPR 1 KOHM 5 1 16W R702 061G0402102 RST CHIPR 1 KOHM 5 1 16W R141 061G0402102 RST CHIPR 1 KOHM 5 1 16W R139 061G0402102 RST CHIPR 1 KOHM 5 1 16W R120...

Page 56: ...1UF 16V X7R C304 065G040210412T CHIP 0 1UF 16V X7R C406 065G040210412T CHIP 0 1UF 16V X7R C407 065G040210412T CHIP 0 1UF 16V X7R C410 065G040210412T CHIP 0 1UF 16V X7R C709 065G040210412T CHIP 0 1UF...

Page 57: ...05105 12 1UF 10 6V X7R C440 065G0805475A7Z CAP CHIP 4 7UF 10V Y5V 20 80 FB407 071G 56G301 EA BEAD 300 FB404 071G 56G301 EA BEAD 300 FB401 071G 56G301 EA BEAD 300 FB301 071G 56K121 CHIP BEAD FB406 071G...

Page 58: ...Q701 057G 417518 TRA LMBT3904LT1G 200MA 40V SOT 23 LRC KEPC8AA9 KEY BOARD SW01 077G 500 5F XL DOME SWITCH 5PCS CN001 089G 76J 6 3 FFC CABLE 6P 220MM P1 0 709G3265 QM001 CONSUMPTIVE ASS Y R004 061G060...

Page 59: ...80UF M 25V C918 067G215D6814KV CAP 105 680UF M 25V C908 067G215R2207KV LOW ESR EC 22UF 50V M 6 3 11MM C939 067G215S1024KV EC 105 CAP 1000UF M 25V C915 067G215S4713KV EC 105 CAP 470UF M 16V C613 067G21...

Page 60: ...T AO4620 7 2A 30V 5 3A 30V SOIC 8 R612 061G0603100 RST CHIPR 10 OHM 5 1 10W R926 061G0603100 1F RST CHIPR 1 KOHM 1 1 10W R812 061G0603100 3F RST CHIPR 100 KOHM 1 1 10W R810 061G0603100 3F RST CHIPR 10...

Page 61: ...061G0805000 RST CHIP MAX 0R05 1 8W JR804 061G0805000 RST CHIP MAX 0R05 1 8W R924 061G0805101 1ST CHIPR 100 OHM 5 1 8W R925 061G0805102 RST CHIPR 1K OHM 5 1 8W R939 061G0805102 RST CHIPR 1K OHM 5 1 8W...

Page 62: ...0603332 32 CHIP 0 0033UF 50V X7R 0603 C606 065G0603474 12 MLCC 0603 0 47UF K 16V X7R C603 065G0603474 12 MLCC 0603 0 47UF K 16V X7R C602 065G0603474 12 MLCC 0603 0 47UF K 16V X7R C601 065G0603474 12 M...

Page 63: ...ABA C906 065G 2K152 2T6921 CAP CER 1500PF K 2KV Y5P FB602 071G 55 9 T FERRITE BEAD J806 071G 55 9 T FERRITE BEAD FB901 071G 55 29 FERRITE BEAD F901 084G 56 4 B FUSE 4A 250V F902 084G 56 4 B FUSE 4A 25...

Page 64: ...1 TN USB CONN CN701 088G 351 2B TN USB CONN X701 093G 2245B HE XTL XAT024000FI1H 3OX AT 49 24 000MHZ U705 056G 585 4A IC AP1117E33L 13 U701 056G 659 9 IC USB2514 AEZG QFN 36 F702 061G 56A075 LT SMD PT...

Page 65: ...02104 15 MLCC 0402 0 1UF K 16V X5R C724 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C747 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C748 065G0402104 15 MLCC 0402 0 1UF K 16V X5R C703 065G0402104 15 MLCC 04...

Page 66: ...ORD 32E1818021 Q07G 1 5V94 WOODEN PALLET Q40G 58170930A LABEL Q40G000270945A CARTON STICK CEL LABEL FOR VG2427WM Q45G2007C0121A CARTON PE BAG Q40G000270926A MANUFACTURE ADDRESS STICKER Q41G2401709 4A...

Page 67: ...t Procedure 6 Troubleshooting Flow Chart 7 Block Diagrams 8 Schematic Diagrams 9 PCB Layout Diagrams 10 Exploded Diagram and Exploded Parts List 11 Recommended Spare Parts List B Are you satisfied wit...

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