ViewSonic VS11444 Service Manual Download Page 48

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ViewSonic Corporation

Confidential - Do Not Copy

6. Troubleshooting Flow Chart

1. Common

Acknowledge

If you change the interface board, be sure that the U103, U105, U106 and U108 these three components also

changed to the new I/F board because there was program inside. If not, please re-write EDID and upload

firmware into U106 via VGA Cable.

If you adjust clock and phase, please do it at the condition of Windows shut down pattern.

If you confirm the R.G.B. color is normal or not, please do it under 16-grey scalar pattern.

This LCM is analog interface. So if the entire screen is an abnormal color that means the problem happen in

the analog circuit part, if only some scale appears abnormal color that stand the problem happen in the digital

circuit part.

If you check the H/V position, please use the crosshatch pattern.

This LCM support more than 30 timing modes, if the input timing mode is out of specification, the picture may

appears abnormally.

If brightness uneven, repairs Inverter circuit or change a new panel.

If you find the vertical line or horizontal line lost on the screen, please change panel.

If you find the speaker don’t working, please don’t plug in audio cable, unless change new speaker.

193

wm-

Summary of Contents for VS11444

Page 1: ...ViewSonic VX1935wm 3 Model No VS11444 19 Color TFT LCD Display VX1935wm 3_SM Rev 1a Oct 2006 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 Service Manual ...

Page 2: ...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 revise this publication and to make changes from time to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or changes Trademarks Optiquest is a registered tra...

Page 3: ... Specification 4 3 Front Panel Function Control Description 13 4 Circuit Description 21 5 Adjustment Procedure 33 6 Troubleshooting Flow Chart 45 7 Recommended Spare Parts List 53 8 Exploded Diagram and Exploded Parts List 56 9 Block Diagram 60 10 Schematic Diagrams 61 11 PCB Layout Diagrams 68 VX1935wm 3 ...

Page 4: ... lean cool dry environment If it gets wet unplug the power cable immediately and consult your closed dealer 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 the glass screen Do not place heavy objects on the monitor or power cord 2 PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this...

Page 5: ...ViewSonic Corporation Confidential Do Not Copy 2 Handling and Placing Methods VX1935wm 3 ...

Page 6: ...ViewSonic Corporation Confidential Do Not Copy 3 VX1935wm 3 ...

Page 7: ... TV Box NextVision 6 Yes Power Voltage AC 100 240V 50 60Hz Yes On Mode Max Typ 42 W 35 W Power Consumption Off Mode Max 1 W Audio 2W THD 10 Max Yes Tilt 20 5 Yes Swivel No Pivot No Ergonomics Height Adjust No OSD Control 1 2 Yes Physical W x H x D 450 x 434 x 209mm Dimension Package W x H x D 545 515 162mm Physical Net Weight 5 2 Kg 11 5 lbs Weight Package Gross Weight 6 7 Kg 14 8 lbs Temperature ...

Page 8: ...Mac Video Signal 1250 mV with no damage to monitor Sync Signals TTL DDC 1 2B Compliant with Revision 1 3 Sync Compatibility Separate Sync Composite Sync SOG 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 400 800 x 600 832 x 624 1024 x 768 1152 x 864 1152 x 870 1280 x 72...

Page 9: ...t with no damage Power Supply Line Surge Immunity Shall be able to withstand 1 5 times nominal line voltage for one cycle with no damage Power Supply Missing Cycle Immunity Shall be able to function properly without reset or visible screen artifacts when cycle of AC power is randomly missing at nominal input Power Supply Acoustics The power supply shall not produce audible noise that would be dete...

Page 10: ...reen Still at the center And the OSD will be 640x400 720x400 primary 720x400 4 640 x 480 50 Hz 24 7 KHz 5 640 x 480 60 Hz 31 5 KHz 6 640 x 480 67 Hz 35 KHz 7 640 x 480 72 Hz 37 9 KHz 8 640 x 480 75 Hz 37 5 KHz 9 640 x 480 85 Hz 43 3 KHz 10 720 x 400 70 Hz 31 5 KHz For Analog sync the image vertical size image will be not full screen Still at the center And the OSD will be 640x400 720x400 primary 7...

Page 11: ...60 x 768 60 Hz 47 7 KHz 40 1400 x 1050 50 Hz 54 1 KHz 41 1400 x 1050 60 Hz 64 7 KHz 42 1400 x 1050 60 Hz 65 3 KHz 43 1400 x 1050 75 Hz 82 3 KHz 44 1440 x 900 60 Hz 55 5 KHz 45 1440 x 900 60 Hz 55 9 KHz 46 1440 x 900 75 Hz 70 6 KHz 1 Tolerance 2KHz 2 Any timing 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 ...

Page 12: ...unction descriptions OSD Lock short cuts function for the buttons The OSD lock will be activated by pressing the front panel control buttons 1 for 10 seconds If the user then tries to access the OSD by pressing any of the buttons 1 2 a message will appear on the screen for 3 seconds showing OSD Locked The OSD lock will be deactivated by pressing the front panel control buttons 1 again for 10 secon...

Page 13: ... Color Settings or Input Priority Resolution Notice Actions 1 Resolution Notice OSD should show on screen after changing to non native mode for 30 sec 2 For auto input select function it shall meet the requirement in Appendix D 3 The OSD should disappear after 10 sec or by pushing button 1 or 2 Resolution Notice function should be disabled when push button 2 under Resolution Notice OSD 0 Touch Fun...

Page 14: ...Speakers stay Off when the rest of the monitor is in power saving Note There is no guarantee 2 W at power consumption in Active Off mode when the Audio Cable is connected 1 LCD PANEL 1st panel source Type Pixel Pitch Color Filter Glass Viewing Angle Contrast Ratio Brightness Response Time Color Depth Backlight Life INL CR 10 19 wide Color TFT Active Matrix WXGA LCD MT190AW01 V 0 0 285mm H x0 285mm...

Page 15: ...nternal Power AC 100 240 VAC 50 60 Hz auto switch 35W Typ 43W Max SPEAKER Stereo Speaker 2w x2 ERGONOMIC S Tilt Down Up 5 Degrees 20 Degrees CONTROLS Physical OSD LCD Head Main Menu 1 2 Power Soft Down Up Auto Image Adjust 1 Contrast Brightness 2 4 Input Select Analog Digital Audio Adjust Volume 4 Mute 4 Color Adjust SRGB 9300K 7500K 6500K default 5400 User Color R G B Information Resolution H Fre...

Page 16: ...el Clock Digital 140 Mhz Max Analog 140 Mhz Max DISPLAY AREA 410 4 H x 256 5 V OPERATING CONDITION Temperature Humidity 32 F to 104 F 0 C to 40 C 20 to 80 no condensation STORAGE SHIPPING CONDITION Temperature Humidity 4 F to 140 F 20 C to 60 C 10 to 90 no condensation DIMENSIONSPhysical Panel Only Packaging W o base 450 mm W x 434 mm H x 209 mm D 17 7 W x 17 H x 8 2 D 450 mm W x 341 mm H x 65 5mm...

Page 17: ...ACCESSORI ES Power Cable 15 Pin VGA Video Cable DVI D Cable Audio Cable Quick Start Guide ViewSonic Wizard CD ROM w 17 Language User Guide EU Packaging Information 1 Weight of the individual empty shipping carton Weight 903 g box 2 Weight and materials of the poly foam Weight 200g piece 2 pieces per box Material EPS 3 Weight and material of the empty accessory plastic bags Weight 2g bag Material P...

Page 18: ...ugh menu options and adjusts the displayed control Also a shortcut to display the Contrast adjustment control screen Displays the control screen for the highlighted control Also toggles between two controls on some screens Also a shortcut to Auto Image Adjust Standby Power On Off Power light Blue ON Orange Power Saving Displays the Main Menu or exits the control screen and saves adjustments VX1935...

Page 19: ...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 1440 x 900 60Hz video signal to the LCD display Look for instructions on changing the refresh rate in the graphics card s user guide If necessary make small adjustments using H POSITION and V POSITION until the scree...

Page 20: ...evel Brightness adjusts background black level of the screen image Input Select toggles between inputs if you have more than one computer connected to the VX1935wm Audio Adjust Volume increases the volume decreases the volume and mutes the audio Mute temporarily silences audio output Color Adjust provides several color adjustment modes including preset color temperatures and a User Color mode whic...

Page 21: ...lighting 6500K Adds red to the screen image for warmer white and richer red 5400K Adds green to the screen image for a darker color User Color Individual adjustments for red R green G and blue B 1 To select color R G or B press button 2 2 To adjust selected color pressSandT Important If you select RECALL from the Main Menu when the product is set to a Preset Timing Mode colors return to the 6500K ...

Page 22: ...tical Position moves the screen image left or right and up or down Fine Tune sharpens the focus by aligning text and or graphics with pixel boundaries NOTE Try Auto Image Adjust first Sharpness 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 VX1935wm 3 ...

Page 23: ...ition allows the user to move the OSD menus and control screens OSD Timeout sets the length of 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 background On or Off Memory Recall returns the adjustments back to factory settings if the display is operating i...

Page 24: ...811 are for line over voltage shutdown OVP When PWM is turned off the main current flow will be consumed through R804 and D802 This will prevent MOSFET Q804 from being damaged under large current impulse and voltage spike D803 and C807 to provide internal Auxiliary voltage to Vcc pin during normal operation Otherwise error amplifier and feedback current input the FB pin for duty cycle control 4 1 ...

Page 25: ...C voltage is inverted DC voltage through D502 D503 D508 and D509 The sense voltage feedback to VSEN pin 6 of IC501 for an over voltage over current condition during normal operation R528 R533 are current sense resistor current sense signal feed back to Isense pin 5 of IC501 for lamp ON detection 4 3 I F Board Circuit 4 2 1Power Input 5V is from the power board and supply for U101 LD1117AL 3 3V U10...

Page 26: ...rotection or supplied by Monitor self via D103 U103 is an EEPROM IC which is a kind of memory and used for saving EDID data 4 2 4Button Control Button Key Power is defined as power on off which is connected to U105 90 through CN105 6 Button Key 2 is defined as two functions of selecting and adjustment which is connected to U105 94 through CN105 5 Button Key Up is defined as plus which is connected...

Page 27: ...ESA 640 480 72Hz 72 809 520 480 3 20 31 500 37 500 840 640 64 120 VESA 640 480 75Hz 75 000 500 480 3 16 31 500 43 269 832 640 56 80 VESA 640 480 85Hz 85 008 509 480 3 25 36 000 35 156 1024 800 72 128 VESA 800 600 56Hz 56 250 625 600 2 22 36 000 37 879 1056 800 128 88 VESA 800 600 60Hz 60 317 628 600 4 23 40 000 48 077 1040 800 120 64 VESA 800 600 72Hz 72 188 666 600 6 23 50 000 46 875 1056 800 80 ...

Page 28: ...75Hz 75 000 900 864 3 32 108 000 68 681 1456 1152 128 144 MAC 1152 870 75Hz 75 062 915 870 3 39 100 000 60 000 1800 1280 112 312 VESA 1280 960 60Hz 60 000 1000 960 3 36 108 000 75 000 1800 1280 112 312 1280 960 75Hz 75 000 1000 960 3 36 130 000 63 981 1688 1280 112 248 VESA 1280 1024 60Hz 60 020 1066 1024 3 38 108 000 79 976 1688 1280 144 248 75 025 1066 1024 3 38 VESA 1280 1024 75Hz 75 025 1066 1...

Page 29: ...t active sets U105 all registers to preset modes and then monitor goes into stand by mode That means hardware power on has been completed 4 5 2 Software Power ON OFF When press power key U105 90 recieves low pulse and then U105 will do the power on off If Power ON U105 91 LED_Green will send out Low potential and then LED green on If Power OFF U105 91 LED_Green will send out High potential and the...

Page 30: ...T 3 GND GND 4 ON OFF CCFL on off control 5 BRIGHTNESS Panel luminance control CCFL brightness 6 GND Ground 7 VOL Volume control input 8 MUTE Mute control input 4 7 3 CN105 Interface BD to Keypad Pin No Symbol Description 1 LED_ GREEN Orange LED lighting control 2 LED_ ORANGE Green LED lighting control 3 GND Ground 4 KEY_POWER DC power on off control 5 KEY_UP OSD control to adjust value to increase...

Page 31: ...signal of even channel 0 LVDS 14 GND Ground 15 RXE1 minus signal of even channel 1 LVDS 16 RXE1 plus signal of even channel 1 LVDS 17 GND Ground 18 RXE2 minus signal of even channel 2 LVDS 19 RXE2 plus signal of even channel 2 LVDS 20 RXEC minus signal of even clock channel LVDS 21 RXEC plus signal of even clock channel LVDS 22 RXE3 minus signal of even channel 3 LVDS 23 RXE3 plus signal of even c...

Page 32: ... and shut down delay time 4 DIM I Analog dimming or Internal LPWM dimming or external PWM pulse input for dimming function 5 ISEN I Current sense feedback 6 VSEN I Voltage sense feedback 7 OVPT I Over voltage over current protection threshold setting pin 8 NC 9 NC 10 ENC I ON OFF control of IC 11 LCT I Timing capacitor to set internal PWM dimming frequency and also a pin for analog dimming selecti...

Page 33: ...ed input 24 AVDD_ADC I ADC Power 25 REFM Internal ADC bottom de coupling pin 26 REFP Internal ADC top de coupling pin 27 HSYNC0 I Analog HSYNC input 28 VSYNC0 I Analog VSYNC input 29 GND Ground 30 DDCA_SDA RS232_TX I O DDC Data for Analog Interface 4mA driving strength UART Transmitter GPIO 31 DDCA_SCL RS232_RX I O DDC Clock for Analog Interface UART Receiver GPIO 32 VDDP I Digital Output Power 33...

Page 34: ...P O A Link Positive LVDS Differential Data Output 61 LVA2M O A Link Negative LVDS Differential Data Output 62 LVA1P O A Link Positive LVDS Differential Data Output 63 LVA1M O A Link Negative LVDS Differential Data Output 64 LVA0P O A Link Positive LVDS Differential Data Output 65 LVA0M O A Link Negative LVDS Differential Data Output 66 VDDC I Digital Core Power 67 LVB3P O B Link Positive LVDS Diff...

Page 35: ...O_P02 SAR3 I O General Purpose Input Output 4mA driving strength SAR ADC Input 91 GPIO_P06 I O General Purpose Input Output 6 12mA programmable driving t th 92 GPIO_P07 I O General Purpose Input Output 6 12mA programmable driving t th 93 PWM0 GPIO_P26 I O Pulse Width Modulation Output 4mA driving strength General Purpose Input Output 4mA driving strength 94 GPIO_P13 I O General Purpose Input Outpu...

Page 36: ... monitor 5 2 Hot Key Operation 5 3 OSD Control 5 3 1 OSD table Layer 1 Layer 2 Layer 3 Auto Image Adjust Contrast Contrast Brightness Brightness Volume Volume Audio Mute On Off sRGB 9300K 6500K 5400K Red Green Color Adjust User Color Blue Hot Key Function Item Function Detail Recall Contrast or Brightness while in the Contrast or Brightness adjustment Recall both Contrast and Brightness when the O...

Page 37: ...Position V Position OSD Time Out Setup Menu OSD Background On Off Memory Recall 5 3 2 OSD lock Menu function OSD Lock Menu Function Check Item Method Phenomenon Activate OSD lock 1 10S Press any of buttons 1 2 will appear OSD Locked 3s Deactivate OSD lock 1 10S again NOTICE When the OSD is locked will lock all functions Status bar indicating OSD Lock or Unlock is in progress and when complete it w...

Page 38: ...ethod Phenomenon Activate Resolution Notice Menu Resolution Notice OSD should show on screen after changing to non native mode for 30 sec And it should disappear after 10s or by pushing button 1 or 2 Deactivate Resolution Notice Menu Push button 2 under Resolution Notice OSD select Disable 5 3 5 Factory Mode Introduction When input the signal press power key to turn off the monitor Press at the sa...

Page 39: ...nerator and display 5 mosic pattern on the monitor Press Power to power off the monitor Press simultaneously to enter factory mode Press Menu 1 then press Auto 2 to execute Auto color item After the Auto Color process finished please press Power to restart monitor 5 6 EDID Rewrite EDID data to EEPROM If we need to rewrite the EEPROM data please confirm the following steps 1 Plug in VGA Cable we ca...

Page 40: ...c Corporation Confidential Do Not Copy 37 5 7 2 Using mStar ISP Tool Update FW 1 Select Read Choose the corresponding firmware load to MCU 2 Select Connect auto connect for ISP 3 Select Run start ISP VX1935wm 3 ...

Page 41: ...e brightest 6 8 shades brightness cannot be distinguished Chroma Signal Generator Color Temperature 1 Do Auto color at 640 x 480 60Hz 5 Mosic pattern 2 Measure color temperature check it complies with the following temperature 5400K x 0 335 0 02 y 0 350 0 02 6500K x 0 313 0 02 y 0 329 0 02 9300K x 0 283 0 02 y 0 298 0 02 Chroma Signal Generator and color analyzer Modes switching check 1 Use Chroma...

Page 42: ...ode 1280x1024 60Hz 2 Set Brightness contrast to default value 3 Do Auto Image Adjust 4 Shut down PC to check whether there s glitter on the center of the picture Equipment Chroma Signal Generator PC Power saving 1 Mode 1440x900 60Hz 2 Pattern full white 3 Brightness Max 4 Contrast Default 5 Check power consumption at each modes State Power Consumption LED color Normal 42W Blue Stand By 2W Orange P...

Page 43: ...ion film to protect the monitor Figure 1 1 2 Put the monitor in the PE bag and seal the bag with tape Figure 2 Figure 1 Figure 2 1 3 Put the cushions on the monitor 1 4 Place the monitor into the carton and then put all the accessories into the carton At last close the carton and seal it with tape Figure 3 Figure 3 DVI CABLE AUDIO MONITOR BASE VX1935wm 3 ...

Page 44: ...ViewSonic Corporation Confidential Do Not Copy 41 Disassembly Procedure BASE HINGE COVER VX1935wm 3 ...

Page 45: ...ViewSonic Corporation Confidential Do Not Copy 42 STAND FRONT COVER VX1935wm 3 ...

Page 46: ...ViewSonic Corporation Confidential Do Not Copy 43 BACK COVER PANEL VX1935wm 3 ...

Page 47: ...ViewSonic Corporation Confidential Do Not Copy 44 CHASSIS I F BOARD P I BOARD KEYPAD BOARD SPEAKER LVDS KEY POWER CABLE VX1935wm 3 ...

Page 48: ... scalar pattern This LCM is analog interface So if the entire screen is an abnormal color that means the problem happen in the analog circuit part if only some scale appears abnormal color that stand the problem happen in the digital circuit part If you check the H V position please use the crosshatch pattern This LCM support more than 30 timing modes if the input timing mode is out of specificati...

Page 49: ...r voltage Check IC802 C804 T801 Check circuit if short Check F801 P801 RT 801 D801 Check pin6 of IC802 voltage about 12V CheckC810 D803 C807 Check pin2 of IC802 voltage about 2V Check primary OVP OLP and secondary feedback Check pin1 of IC802 voltage is below 1V Check R811 R810 R809 R808 R814 END VX1935wm 3 ...

Page 50: ...eck R822 R823 R824 Change R822 R823 R824 Check the R pin voltage of IC803 about 2 5V Check R819 R820 Check R818 D804 C807 if short Change R818 D804 C807 Check pin2 of IC802 voltage is 3V Check pin1 of IC802 voltage below 1V Change R808 R 809 R810 R 811 R815 END Check the C pin voltage of IC803 if 3V Change IC803 VX1935wm 3 ...

Page 51: ... R810 R811 R818 Change R810 R811 R818 Check the R pin voltage of IC803 about 2 5V Check R809 R808 R814 D809 Check D806 C815 if short Change D806 C815 Check pin1 of IC802 voltage is 5 8V Check pin3 of IC802 voltage about 1V Change R801 R805 R822 R823 R817 END Check the C pin voltage of IC803 if 3V Change IC803 VX1935wm 3 ...

Page 52: ...k CCFL Enable pin 85 of U105 Check crystal pin 96 97 waveform of U105 Check reset pin84 of U105 Check power supply for U105 Check power supply pin 1 2 of CN101 Check R167 Q106 R108 R110 Inverter Fail Check X101 C153 C154 Check C144 R172 Check FB102 FB103 FB105 FB106 Power fail NG NG NG NG NG NG YES YES YES YES YES YES VX1935wm 3 ...

Page 53: ...lack Screen Power Fail Check Power Supply Pin 1 2 of CN101 Check Power Pin 2 of U101 and Pin 2 of U102 Check Reset Waveform Pin 84 of U105 Check Crystal Waveform Pin 96 97 of U105 U101 U102 Fail Check X101 C153 C154 U105 TSUM16AL Fail NG OK NG OK NG OK OK NG Check C144 and R172 VX1935wm 3 ...

Page 54: ...White Screen END White screen Check LVDS signal Check Q101 Q103 Q110 C108 C109 Check Panel Enable of U105 pin48 Check VLCD is 5V Change LVDSCable LVDS Cable Reinsert Workmanship Panel Fail LVDS cable NG U105 Fail OK OK OK OK OK NG NG NG NG NG VX1935wm 3 ...

Page 55: ...on Confidential Do Not Copy 52 8 Bad Screen Check the pins of U105 Bad Screen Check Crystal pin96 97 of U105 Change LVDS Cable LVDS Cable Reinsert CheckX101 C153 C154 LVDS Cable NG Workmanship OK OK OK NG NG NG VX1935wm 3 ...

Page 56: ...300800800R 16 LCD PANEL 19 MT190AW01 V0 G1 AM19000040 E 00008016 631102090600R 17 Speaker 2 0W 8Ω 370mm R G B W CASE E 00008137 618100200120R 18 EPE PE Bag L540xW500xT0 05mm P 00008032 506120302400R 19 Craft Box P 00008177 506020012500R 20 Foam EPS Left P 00008178 506040010100R 21 Foam EPS Right P 00008179 506040010110R 22 Foam EPS Top P 00008180 506040010111R 23 BAG PLASTIC W 545 165 xL1100xT0 05...

Page 57: ...A 714078660000R ASSY FINAL B V0 G1 2 3 W SPK LP1909 6I2 34 N A 509116608510R SCREW P CROSS M4 8 BLACK NL NYLOK 400 35 N A 509112308100R SCREW P CROSS T T 3 8 Zn ROHS REV A 200 36 N A 509112310100R SCREW P CROSS T T 3 10 Zn 100 37 N A 503040000310R RUBBER COVER B LE1534 400 38 C 00008187 501020210410R COVER HINGE L LP1909 100 39 C 00008188 501020210510R COVER HINGE R LP1909 100 40 E 00008137 618100...

Page 58: ...00 85 N A 631102090610R LCD PANEL 19 MT190AW01 V0 AM19000040 3nd Source 86 N A 631102090720R LCD PANEL 19 MT190AW01 V0 AM19000040 2nd Source 87 B 00008169 790741300600R PCBA I F BOARD LP1909 612 100 88 B 00008170 790741500000R PCBA KEYPAD BOARD LP1909 100 89 B 00008171 790741400600R PCBA P I BOARD LP1909 612 100 90 CB 00008071 430303000690R HRN LVDS FFC 30P 158mm ROHS 100 91 CB 00008072 4303008008...

Page 59: ...8 Exploded Diagram and Exploded Parts List ViewSonic Corporation Confidential Do Not Copy 56 VX1935wm 3 ...

Page 60: ...SSY BACK COVER LP1909 1 11 N A 503040000310R RUBBER COVER B LE1534 4 12 C 00008187 501020210410R COVER HINGE L LP1909 1 13 C 00008188 501020210510R COVER HINGE R LP1909 1 14 B 00008170 790741500000R PCBA KEYPAD BOARD LP1909 1 15 CB 00008072 430300800800R HRN ASS Y 8P 200mm UL1571 28 ROHS 1 16 N A 502080000110R SUPPORT HINGE LP1909 1 17 PL 00008048 714010007910R ASSY STAND LP1909 1 18 C 00008189 71...

Page 61: ...ViewSonic Corporation Confidential Do Not Copy 58 VX1935wm 3 ...

Page 62: ...PE W330 L300 T0 3mm CYCLE PRINTED LP1909 1 8 C 00008189 714020007910R ASSY BASE VX1935 LP1909 1 9 P 00008180 506040010111R CUSHION EPS TOP VX1935 LP1909 1 10 CB 00008070 453030300180R CABLE DVI D 18 1P MALE 6FT PC99 BLACK SA 1 11 CB 00005254 453010100100R CABLE D SUB 15P MALE 6FT BLACK BLUE SZ40 1 12 P 00008178 506040010100R CUSHION EPS L VX1935 LP1909 1 13 P 00008032 506120302400R BAG EPE PE L540...

Page 63: ...ViewSonic Corporation Confidential Do Not Copy 60 9 Block Diagram VX1935wm 3 ...

Page 64: ...0 47 16V R709 1K R708 27K R713 5K6 R703 10K R710 1K R712 2 2K C711 4700p 50V R702 10K Q702 PMBT3904 1 3 2 C701 220u 16V Q703 PMBT3904 1 3 2 Q701 PMBT3904 1 3 2 C709 0 1 50V CN701 4P 2 0mm 1 2 3 4 C713 10u 25V C712 4700p 50V C704 0 47 16V C702 470u 25V R706 47K FB701 600Ω R707 5K6 U701 TDA7496SA 8 11 15 5 4 3 2 6 1 7 9 10 14 13 12 S_GND GND GND INL VAROUT_L VOLUME VAROUT_R NC INR SVR STBY MUTE OUTR...

Page 65: ...22u 25V Q106 PMBT3904 1 3 2 Q110 2N7002 1 3 2 Q101 AP2305GN 1 3 2 R191 4K7 U102 FS8860 18PJ 3 1 2 VIN ADJ VOUT C104 0 1 50V U101 FS8860 33PJ 3 1 2 VIN ADJ VOUT 1 3 2 Q105 PMBT3906 C109 0 1 50V R110 4K7 C108 220u 16V C103 0 1 50V R162 1K R106 10K R102 100K R101 390 CN105 2x4P 2 0mm 1 2 3 4 5 6 7 8 R197 51 R108 4K7 R190 4K7 C107 0 1 50V CN101 4500 06 1 2 3 4 5 6 7 8 R107 390 Q103 PMBT3904 1 3 2 VCC3...

Page 66: ...l Title Date Rev ViewSonic Corporation Keypad From IF BD 1 POWER 2 SW901 TACT 4 3 1 3 2 4 LED901 LED Y B 3 2 1 SW903 TACT 4 3 1 3 2 4 SW902 TACT 4 3 1 3 2 4 R901 2K2 CN901 8P 1 5mm 90 1 2 3 4 5 6 7 8 SW904 TACT 4 3 1 3 2 4 SW905 TACT 4 3 1 3 2 4 VX1935wm 3 ...

Page 67: ...K7 C122 NC R149 4K7 C115 0 047 25V R144 10 TVS110 BAV99 1 3 2 U103 CAT24WC02W 1 2 3 4 5 6 7 8 A0 A1 A2 GND SDA SCL WP VCC C129 0 1 50V R148 4K7 Q104 PMBT3904 NC 1 3 2 ZD106 5V6 R116 100 C112 0 047 25V TVS107 BAV99 1 3 2 TVS102 BAV99 1 3 2 R140 10 C123 NC R103 4K7 NC R136 2K2 R125 100 R119 100 R126 100 C117 0 047 25V R138 10 R151 100 ZD104 5V6 R122 4K7 U104 CAT24WC02W 1 2 3 4 5 6 7 8 A0 A1 A2 GND S...

Page 68: ...0 I2C_MCL RST GPIO_P23 GPIO_P22 AVDD_MPLL AVDD_PLL VDDP VDDP VDDC VDDC VDDC GND GND GND GND GND BYPASS RSTN NC NC NC R178 100 C136 0 1 50V R168 100 R159 1K R167 4 7K X101 14 31818MHz C142 22u 25V C149 0 1 50V C152 0 1 50V FB104 60Ω FB106 60Ω C134 0 1 50V R179 100 C144 10u 25V C137 0 1 50V R166 1K U106 SST25VF010A 1 2 3 4 5 6 7 8 CS SO WP GND SI SCK HOLD VCC R158 1K C143 0 1 50V C138 22u 25V R161 1...

Page 69: ...BAV99 1 2 3 D507 BAV99 1 2 3 C514 2700p 50V C523 10p 3KV C511 0 022 25V R502 680 R531 3K3 1 R535 0 R527 470 C527 2700p 50V C515 2 2u 25V R514 47K 1 R532 33 R525 3M 3KV R505 33 IC501 OZ9938G 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DRV1 VDDA TIMER DIM ISSEN VSEN OVPT NC NC ENA LCT SSTCMP CT GNDA DRV2 PGND C522 1000p 50V R506 3M 3KV CN503 2P 1 2 H L D511 SN4148 R523 590 R510 3K3 1 C525 2200p 50V R516 ...

Page 70: ...R 1 3 2 ZD802 16V NC L801 20mH 4 1 3 2 T801 SPW 055 1 2 3 5 4 11 6 7 9 10 8 F801 2A 250V R803 10K R809 510K R802 330K C818 1000u 10V C807 47u 25V C804 100u 450V C813 1000p 500V C825 0 1 50V R819 1K C808 47p 1KV R810 510K IC801 LTV817M 3 1 4 2 ZD801 5V6 NC C820 47u 25V RT801 NTC 5R P801 AC_SKT 1 2 3 C817 470u 25V R818 200 D801 BL4 06 1 2 4 3 R811 510K C803 0 47 275V C812 220p 50V D806 1N4148 C824 0...

Page 71: ...ViewSonic Corporation Confidential Do Not Copy 68 11 PCB Layout Diagrams VX1935wm 3 ...

Page 72: ...ViewSonic Corporation Confidential Do Not Copy 69 VX1935wm 3 ...

Page 73: ...ViewSonic Corporation Confidential Do Not Copy 70 VX1935wm 3 ...

Page 74: ...ViewSonic Corporation Confidential Do Not Copy 71 VX1935wm 3 ...

Page 75: ...ription 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 Diagrams B Are you satisfied with this Service Manual Item Excellent Good Fair Bad 1 Service Manual Content 2 Service Manual Layout 3 The form and listing C Do you have any other opinions or suggestions regarding ...

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