ViewSonic VA712-1, Service Manual

Page 1: ...ViewSonic VA712 1 VA712b 1 Model No VS10697 17 Color TFT LCD Display VA712 1_VA712b 1_SM Rev 1b Mar 2006 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 Service Manual ...

Page 2: ...rchantability 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 ViewSonic is a registered trademark of ViewSonic Corporation All other trademarks used within this document are the property of the...

Page 3: ...iption 15 4 Circuit Description 21 5 Adjustment Procedure 24 6 Troubleshooting Flow Chart 39 7 Recommended Spare Parts List 44 8 Exploded Diagram and Exploded Parts List 52 9 Block Diagram 66 10 Schematic Diagrams 67 11 PCB Layout Diagrams 77 ii ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 4: ...e of the high voltage used in the inverter circuit the voltage is exposed in such areas as the associated transformer circuits 4 LCD Module Handling Precautions 4 1 Handling Precautions 1 Since front polarizer is easily damaged pay attention not to scratch it 2 Be sure to turn off power supply when connecting or disconnecting input connector 3 Wipe off water drops immediately Long contact with wat...

Page 5: ...CD contains a small amount of mercury Please follow local ordinances or regulations for disposal 13 The LCD module contains a small amount of materials having no flammability grade The LCD module should be supplied with power that complies with the requirements of Limited Power Source IEC60950 or UL1950 or an exemption should be applied for 14 The LCD module is designed so that the CCFL in it is s...

Page 6: ...ver of the monitor Do not touch the surface of the polarizer Surface of the panel is pressed by fingers this may cause MURA Take out the monitor with cushion Take out the monitor by grasping the LCD panel That may cause MURA 3 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 7: ...ethods Incorrect Methods Place the monitor on a clean soft foam pad Place the monitor on foreign objects That could scratch the surface of panel 4 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 8: ...e Max Typ 60 W 51 W Power Consumption Active Off Mode Max 3 W Audio 1 W Yes Tilt 20 2 5 1 5 Yes Swivel No Pivot No Ergonomics Height Adjust No OSD Control 1 2 X X Yes Physical W x H x D mm 386 x 411 x 177 Dimension Package W x H x D mm 470 x 476 x 228 Physical Net kg lb 4 4kg 9 48 lbs Weight Package Gross Kg lb 6 8 kg 15 lbs Temperature 41 95 5 35 Operating Condition Humidity 20 80 Temperature 4 1...

Page 9: ...k CCC type NO NO YES NO Power Cable 1 8m color black PSE type NO NO NO YES Analog Cable 1 8 m color black with PC 2001 and Hot Plug Detect DDC YES YES YES YES Audio Cable 1 8m Color black with PC 2001 YES YES YES YES DVI Cable 1 8m color black with PC 2001 NO NO NO NO ViewSonic CD Wizard ViewSonic Quick Start Guide Arabic English Finnish Spanish German Italian Japanese Swedish Polish Korean Portug...

Page 10: ...Separate Video Impedance 75 Ohms Analog Maximum PC Video Signal 950 mV with no damage to monitor Maximum Mac Video Signal 1250 mV with no damage to monitor Sync Signals TTL DDC 2B Compliant with Revision 1 3 Sync Compatibility 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 48...

Page 11: ...hout 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 detectable by the user Audible shall defined to be in compliance with ISO 7779 DIN EN27779 1991 Noise measurements of machines acoustics Power Switch noise shall not be considered US Type Power Cable Separate 3 pron...

Page 12: ... 1kHz Yes 15 800 x 600 85Hz 53 7kHz Yes 16 832 x 624 75Hz 49 7kHz Yes 17 1024 x 768 60Hz 48 4kHz Yes 18 1024 x 768 70Hz 56 5kHz Yes 19 1024 x 768 72Hz 58 1kHz Yes 20 1024 x 768 75Hz 60 0kHz Yes 21 1024 x 768 85Hz 68 67kHz Yes 22 1152 x 870 75Hz 68 7kHz Yes 23 1280 x 1024 60Hz 63 4kHz Yes 24 1280 x 1024 75Hz 79 97kHz Yes 25 1280x 720 60Hz 45kHz HDTV Yes Note 1 When Vertical frequency at 85Hz or res...

Page 13: ...es On Mode Max Typ 60 W 51 W Power Consumption Active Off Mode Max 3 W Audio 1 W Yes Tilt 20 2 5 1 5 Yes Swivel No Pivot No Ergonomics Height Adjust No OSD Control 1 2 X X Yes Physical W x H x D mm 386 x 411 x 177 Dimension Package W x H x D mm 470 x 476 x 228 Physical Net kg lb 4 4kg 9 48 lbs Weight Package Gross Kg lb 6 8 kg 15 lbs Temperature 41 95 5 35 Operating Condition Humidity 20 80 Temper...

Page 14: ...black CCC type NO NO YES NO Power Cable 1 8m color black PSE type NO NO NO YES Analog Cable 1 8 m color black with PC 2001 and Hot Plug Detect DDC YES YES YES YES Audio Cable 1 8m Color black with PC 2001 YES YES YES YES DVI Cable 1 8m color black with PC 2001 NO NO NO NO ViewSonic CD Wizard ViewSonic Quick Start Guide Arabic English Finnish Spanish German Italian Japanese Swedish Polish Korean Po...

Page 15: ...Separate 2 TMDS Digital Video Impedance 75 Ohms Analog 100 Ohms Digital Maximum PC Video Signal 950 mV with no damage to monitor Maximum Mac Video Signal 1250 mV with no damage to monitor Sync Signals TTL DDC 2B Compliant with Revision 1 3 Sync Compatibility Separate Sync Video Compatibility Shall be compatible with all PC type computers Macintosh computers and after market video cards Resolution ...

Page 16: ...hout 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 detectable by the user Audible shall defined to be in compliance with ISO 7779 DIN EN27779 1991 Noise measurements of machines acoustics Power Switch noise shall not be considered US Type Power Cable Separate 3 pron...

Page 17: ...z 48 1kHz Yes Yes 15 800 x 600 85Hz 53 7kHz Yes Yes 16 832 x 624 75Hz 49 7kHz Yes Yes 17 1024 x 768 60Hz 48 4kHz Yes Yes 18 1024 x 768 70Hz 56 5kHz Yes Yes 19 1024 x 768 72Hz 58 1kHz Yes Yes 20 1024 x 768 75Hz 60 0kHz Yes Yes 21 1024 x 768 85Hz 68 67kHz Yes Yes 22 1152 x 870 75Hz 68 7kHz Yes Yes 23 1280 x 1024 60Hz 63 4kHz Yes Yes 24 1280 x 1024 75Hz 79 97kHz Yes No 25 1280x 720 60Hz 45kHz HDTV Ye...

Page 18: ...ions 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 toggle analog and digital connection Power light Green ON Orange Power Saving Standby Power On Off Displays the Main Menu or exits the control screen and saves adjustment...

Page 19: ...press button 1 twice The following tips may help you optimize your display Adjust your computer s graphic card so that it outputs a video signal 1280 x 1024 60Hz to the LCD display Look for instructions on changing the refresh rate in your graphic card s user guide If necessary make small adjustments using H POSITION and V POSITION until the screen image is completely visible The black border arou...

Page 20: ...allows you to adjust red R green G and blue B separately The factory setting for this product is 6500K 6500 Kelvin 9300K Adds blue to the screen image for cooler white used in most office settings with fluorescent 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 5000K Adds blue and green to the screen image for a da...

Page 21: ...80 x 1024 60Hz recommended means that the resolution is 1280 x 1024 and the refresh rate is 60 Hertz Manual Image Adjust Sub menu H Size Horizontal Size adjusts the width of the screen image H V Position Horizontal Vertical Position moves the screen image left or right and up or down Fine Tune sharpens the focus by aligning the text and or graphic characters NOTE Try Auto Image Adjust first Sharpn...

Page 22: ...you to move the on screen display menus and control screens OSD Timeout sets the length of time the on screen display 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 On Off allows you to turn the On Screen Display background On or Off Memory Recall returns the adjustments back to factory settings if ...

Page 23: ...ower Lock 1 OSD Lock 1 Turn off Power on off button 2 Press Power on off at same time 3 Press 1 All Mode Reset It will erase all end users setting and restore the factory defaults Remark All the short cuts function are only available while OSD off Hot Keys for Factory Control 3 Turn off Power on off button 4 Press Power on off at same time 5 Press 1 Then you will see the BIOS update picture show i...

Page 24: ...at contains an on chip 2 5V reference two error amplifier an adjustable oscillator two dead time comparators under voltage lockout circuitry and 2 common emitter output It is idea for step up step down and inverting converter 4 Circuit Description 21 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 25: ...into thirty two uniform blocks of 4 Kbytes each for data and or code storage The block architecture allows users to flexibly make chip erase or block erase operation The block erase feature allows a particular block to be erased and reprogrammed without affecting the data in other blocks After the device performs chip erase or block erase operation it can be reprogrammed on a byte by byte basis 22...

Page 26: ...gh degree of flexibility and quality 4 LVDS THC63LVDM83A The THC63LVDM83A transmitter converts 28 bits of CMOS TTL data into LVDS Low Voltage Differential Signaling data stream A phase locked transmit clock is transmitted in parallel with the data streams over a fifth LVDS link The HC63LVDM83A can be programmed for rising edge or falling edge clocks through a dedicated pin The THC63LVDF84A receive...

Page 27: ...st C The LCD monitor will start the Auto Adjust process automatically and run for 10 consecutive seconds during which time you will notice the image change 3 Firmware Test Patten Burn in Model Refer to Chap3 Hot Keys for Function Control Make sure the F W is the latest version 4 DCC Test Patten EDID program Make sure it can pass test program 5 Window Shut Down Test Signal 1280 1024 60Hz Test Patte...

Page 28: ...ite Gray Inspection Item Bright Dot Particle Line Defect Mura 9 White Box Test Signal 1280 1024 60Hz Test Pattern Window standard pattern Inspection Item Particle Line Defect Power Image Remain Mura 10 Black Box Test Signal 1280 1024 60Hz Test Pattern Window standard pattern Inspection Item Bright Dot Line Defect Power 25 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 29: ...ion Item Bright Dot Partial Line Defect 13 Blue Test Signal 1280 1024 60Hz Test Pattern Full Screen Green Inspection Item Bright Dot Partial Line Defect 14 Gray_Scale_0 100_V256 Test Signal 1280 1024 60Hz Test Pattern Vertical 64 256 Gray Scale Right Left From 0 to 100 White Inspection Item Line Defect Function Defect 26 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 30: ...fect Function Defect 16 Block Window Test Signal 1280 1024 60Hz Test Pattern Black block at the center Inspection Item Cross Talk Optical Character 17 Black_Tile Test Signal 1280 1024 60Hz Test Pattern Black tile under white background Inspection Item Function Defect Image Remain 27 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 31: ... 256 Gray Scale 上 下 From 0 to 100 White Figure 2 3 Black Full Screen Black Figure 3 4 Red Full Screen 50 Red Figure 4 5 Green Full Screen 50 Green Figure 5 6 Blue Full Screen 50 Blue Figure6 7 White Full Screen White Figure7 8 Black_Tile Black Tile Under White Background Figure 8 Figure 1 Figure 2 Figure 4 Figure 3 28 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 32: ...Figure 5 Figure 8 Figure 7 Figure 6 Figure 5 29 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 33: ... computer and LCD monitor on B Press the Auto button on monitor keypad to Auto Adjust C The LCD monitor will start the Auto Adjust process automatically and run for 10 consecutive seconds during which time you will notice the image change 3 Firmware Test Patten Burn in Model Refer to Chap3 Hot Keys for Function Control Make sure the F W is the latest version 4 DCC Test Patten EDID program Make sur...

Page 34: ...iles kindly see as below a ISPACK EXE Main program b Ancillary ISPACK EXE Description program 1 1 2 Hardware RS232 cable 9 Pin D_Sub cable 15Pin 12V Power supply RS232 to D_Sub transfer BD GProbe4 2 0 3 exe GProbe4 2 0 3_gm5126 exe Monitor Set 12V PC optional RS232 to PC 31 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 35: ... 3 Join R232 monitor cable and adapter Detail see the example picture as below Connect to adapter 12v VGA Cable Connect PC Connect monitor 32 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 36: ...t If the file existence already needn t to repeat This system is applied to Win 95 98 NT 2000 1 3 ISP Execution GProbe4 2 0 3 exe GProbe4 2 0 3_gm5126 exe ISP GProbe Gprobe exe Pre txt Readme txt 5126bc14 dev ISP exe Main program Drive write file Drive read file Ancillary file Please copy all the files above to the same directory 33 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 37: ...1 Open ISP Gprobe while parameters set up have been completed 2 You will see the picture as below ISP GProbe 34 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 38: ...in program Grope 4 Please follow up the parameter set up shown as below Choose the item for parameter link while program execution SERIAL1 COM1 115200 35 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 39: ...5 Select gm5126AA_AB Select gm5126AA_AB 36 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 40: ...put BATCH PRE TXT Input BATCH PRE TXT The system can execute ISP while the words show up If appear line 3 is OK Appear line 2 is Error Please check wiring 37 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 41: ...failed Please don t turn off power Repeat do it again from step 6 to step 7 8 When everything is done Please turn off the power and restart it again Check Factory Mode and make sure it already be updated Key BIOS Rev which you want here This is the BIOS update total spending time 17E1HG3004 38 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 42: ...Sticking Brightness spot Particle Dot Defect Check Panel No display Check PCB Check Panel Check Wire Noise Check PCB Check Panel Light On Test Completed Next Step Panel Change Should be Performed to Level 3 Repair stage Panel Change AD B Change Panel Change AD B Change Panel Change Abnormal Display TEST N A 6 Troubleshooting Flow Chart 39 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA71...

Page 43: ...ormal Check PCB Check Panel Flicker Check PCB Check Panel D sub cable change Panel Chan e Should be Performed to Level 3 Repair stage Next Step AD B Change P B Change Panel Change AD B Change Panel Change AD B Change AD B Change AD B Change AD B Change P B Change Panel Change Panel Change Panel Change CNT B Change CNT B Change D sub cable change TEST NG A Completed 40 ViewSonic Corporation Confide...

Page 44: ...p Panel Change Should be Performed to Level 3 Repair stage Unavailable Check PCB Check Wire LED Dark LED Abnormal LED Flicker AD B Change AD B Change AD B Change P B Change P B Change P B Change CNT B Change OSD cable Change OSD cable Change ON OF Abnormal LED display abnormal Abnormal Keyboard TEST NG Completed 41 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 45: ...pping Check PCB Check Panel Next Step Panel Change Should be Performed to Level 3 Repair stage AD B Change AD B Change AD B Change P B Change Panel Change CNT B Change P B Change CNT B Change CNT B Change D sub cable change Abnormal BIOS OSD Other Abnormal Display TEST NG Completed 42 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 46: ...y Mode l Fuzzy Image Adjust Phase l Image too bright Adjust brightness and contrast by OSD l Image too dark Adjust brightness and contrast by OSD l Irregular image Check the signal connection between the computer and LCD monitor Perform Auto Adjust l Distorted image Reset the LCD monitor Take off extra accessories such as signal extension cord l Image is not centered Use OSD Image Menu to adjust H...

Page 47: ...0mm 16mm Pitch 1 0mm CB 00000546 3241700001 1 18 Monitor Cable A150X2 30AWG 180cm Black JCE CB 00000547 32F3018003 1 19 Documentation Carton Label A170E1 H0G 76 2 mm 76 2 mm DC 00002072 77 D000113 1 20 Label Bar Code Labe 55 13mm DC 00002073 7741519181 1 21 Menu for VSC VA712 Complex 4C DC 00002074 76 D000119 1 22 Safety Label A170E1 H0G 118 mm 49 mm DC 00002075 77 D000115 1 23 Hardware Corner Pro...

Page 48: ...545 3241702002 1 20 FFC OSD A170E1 H01 15Pin 180mm 16mm Pitch 1 0mm CB 00000546 3241700001 1 21 Monitor Cable A150X2 30AWG 180cm Black JCE CB 00000547 32F3018003 1 22 Carton Label for A170E1 H0G 76 2 mmx76 2 mm VSC VA712b DC 00002084 77 D000264 23 Label Bar Code Labe 55 13mm DC 00000548 7741519181 1 24 Menu for VSC_VA712b Complex 4C A170E1 H0G DC 00002085 76 D000312 1 25 Safety Label for A170E1 H0...

Page 49: ...mi Auto BLU West Lamp 10ms For VSC Yes 1 19 N A 2714000027 DC AC Inverter TWS 444 991 2560V min 5 5mA type Sumida 1 20 N A 3241702002 FFC_X A170E1 45Pin 55 23mm 2 21 C 00000465 41A1799102 Cover FFC A170E1 Tin Plate t 0 4mm 1 22 C 00000463 41A1799116 Cover ad assy A170E1 Tinplate t 0 4mm Autoassy 1 23 HW 00000553 42A9930008 Screw M3 P0 5 4 5 5 2 Steel 13 24 M 00000559 42A9940007 Stand Off 4 40 11 8...

Page 50: ...VA712 1 N A 77 D000267 SN Label for A170E1 H0G 50 mmx25 mm VSC_VA712 1 N A 77 D000349 SN Label for A170E1 H0G 50 mmx25 mm VSC_VA712_for China 1 53 DC 00002075 77 D000115 Safety Label A170E1 H0G 118 mm 49 mm 1 54 P 00002071 7841719931 PE Foam Bag LDPE 490x560x0 13 1 55 N A 7841599191 Pallet A150X1 T01 Wooden 1150 mmx970 mmx135 mm 0 025 56 N A 7841995111 Separator AA 1130x955x11 A190E1 H01 0 025 57 ...

Page 51: ...de UL SVT 18 3C 75 LP 30B LS 13 L 1830 50mm Black Linetek 18AWG No Bag 1 A 00002058 32E1818013 Power Cord CCC 300 500V 0 75mm2 3C PC 323 COC 01 L 1830 50mm Black Linetek 18AWG No Bag 1 A 00002059 32E1818018 Power Code CEE SP 023 IS 14 H05VV F 3G 0 75mm2 CT 12 L 1800 50mm I SHENG 18AWG Black No Bag 1 A 00002060 32E1818014 Power Code JIS VCTF 0 75mm2 3C LP54 LS 13J L 1830 50mm Black Linetek 18AWG No...

Page 52: ...tor MLCC Y5V 1206 4 7uF 16V 20 80 C2 C26 C37 C39 C41 C43 C4 5 7 16 N A 250345S452 Connector B F 45pin Hirose FH12 45S 0 5SH CN2 CN1 2 17 N A 7349951002 Silicone TORAY 9187L 330g 0 4 18 N A PH0EFH5G03 Olympic 17 Function BOM D sub DVI Audio Genesis Semi Auto BLU West Lamp 10ms For VSC Yes 1 19 N A 2714000027 DC AC Inverter TWS 444 991 2560V min 5 5mA type Sumida 1 20 N A 3241702002 FFC_X A170E1 45P...

Page 53: ... A2 TR8 605nm H 0 8mm Everlight RoHS D2 1 44 N A 2304114001 LED Lamp SMD Green 19 21VGC TR8 571nm H 0 8mm Everlight RoHS D1 1 45 N A 2503715151 Connector B F 15Pin E T 7151 15 CN1 1 46 N A 2502532021 CONNECTOR W B A150X2 MOLEX 53261 0290 2Pin CN3 CN2 2 47 N A 2704020004 Switch Forward SFKHHMW 4Pin 12V DC 5mA SW1 SW2 SW3 SW4 SW5 S W6 6 48 N A 10E1700047 Software EDID_D SUB A170E1 Ver VSCCE1BA00 Vie...

Page 54: ...Olympic 17 Accessory BOM D sub DVI Audio China 3 pin Black For VSC 1 N A PH0EAET000 Olympic 17 Accessory BOM D sub DVI Audio European Korea 2 pin Black For VSC 1 N A PH0EAJE000 Olympic 17 Accessory BOM D sub DVI Audio Japan 2 pin Black For VSC 1 N A PH0EAKP000 Olympic 17 Accessory BOM D sub DVI Audio UK HK 3 pin Black For VSC 1 71 A 00002056 271906019K Adapter DA 60F19 AE 19 V 3 16 A 60 W Black As...

Page 55: ...02062 35 D000353 AD PCB Analog 8 CB 00000545 3241702002 FFC X PCBA TO AD PCBA 9 HW 00002077 41A1799118 COVER AD 10 C 00000465 41A1799102 COVER FFC C 00002081 40 D000175 REAR ASSY Digital C 00002065 40 D000165 REAR ASSY Analog 12 C 00002082 40 D000163 STAND SEAT ASSY 13 C 00002064 40 D000212 COVER HINGE 14 CB 00000546 3241700001 FFC AD PCBA TO OSD PCBA 15 HW 00000556 42A9990005 SCREW M3 PITCH1 27 1...

Page 56: ...1 1 1 Remove Stand Cover Step 1 Remove Cover Hinges Step 2 Loose and Remove 4 screws Step 3 Remove Stand Assy Step 4 Completed Monitor Assembly and Disassembly 53 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 57: ...ews Separate Bezel hooks to take Bezel and Rear Cover apart Step 1 Loose and remove 2 screws Step 2 Separate Bezel hooks to take Bezel and Rear Cover apart Step 3 Remove Rear Cover Step 4 Completed 54 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 58: ... Power Board 1 3 1 Remove the Tinfoil 1 3 2 Remove FFC 1 3 3 Remove Metal Cover Step 1 Loose and remove 4 screws Step 2 Loose and remove 6 screws 55 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 59: ...emove Power PCBA Step 3 Remove the Cover of X PCB Step 4 Completed Step 1 Loose and remove 3 screws Step 2 Remove Power PCBA Step 3 Completed 56 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 60: ...1 4 Change New Power Board Step 1 Insert New Power PCBA Step 2 Fasten 3 fixed screws of Power PCBA Step 3 Completed 57 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 61: ...1 5 Remove AD PCBA Step 2 Remove 2 FFC from AD PCBA Step 3 Remove AD PCBA Step 1 Loose and remove 1 screw Step 4 Completed 58 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 62: ...1 6 Change New AD PCBA Step 1 Place New AD PCBA Step 2 Insert 2 FFC Step 4 Completed Step 3 Fasten 1 screw 59 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 63: ...embly Step 1 Join the cover hooks of X PCB Step 4 Insert FFC Step 3 Fasten 4 screws Step 2 Fasten the 6 screws Step 6 Completed Step 5 Attach the Tinfoil 60 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 64: ...1 8 Separate Bezel Assy Step 3 Completed Step 2 Lift up LCD module and remove Bezel Step 1 Loose and remove 4 screws 61 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 65: ...move OSD PCBA Step 2 Separate both Audio Cable Step 4 Take OSD PCBA apart Step 1 Remove FFC Step 3 Loose and remove 2 screws Step 5 Completed 62 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 66: ... Change New OSD PCBA Step 1 Place New OSD PCBA Step 3 Insert Audit Cable to connectors of OSD PCBA Step 2 Fasten 2 screws Step 4 Completed 63 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 67: ...1 11 Rear Cover Assy Assembly Step 1 Place Rear Cover Step 2 Join Rear Cover with Bezel Step 4 Place Stand Assy Step 3 Fasten 2 screws 64 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 68: ...Step 5 Fasten 4 screws to fixed Stand Assy Step 6 Insert Cover Hinge Step 7 Completed 65 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 69: ...66 ViewSonic Corporation OSD Key Pad DC 19V DC DC Main Board Inverter Backlight LCD Module DC 19V D sub Analog Video 3 3V Signal Audio In Speaker Audio Out DVI D Digital Video Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 70: ...KP EB2P HSYNC OG2N OB2P GREEN OB1N RXC BLUE RX0 OB2N PANEL_ON OFF INV_ON OFF GVON DDC_SCL DDC_SDA RXD TXD SOURCE_SELECT PWR_SW LED_G LED_O KEY_UP KEY_DOWN MENU AUTO_ADJ VOL_MUTE VCM_PWM VOL_ADJ INV_ADJ1 V5A V25V V33C STV OSTH OE CKV POL GVOFF STB ESTH XAO POWER POWER PANEL_ON OFF VCM V5A V33C V25V V33B V33A VCM_PWM VAA GMA1 GMA3 GMA5 GMA7 GMA9 GMA10 GMA8 GMA2 GMA4 GMA6 APA4835 AUDIO VOL_ADJ VOL_MU...

Page 71: ...oHS RP24 0603 100R 5 RP24 0603 100R 5 1 3 2 QP2 2N7002 RoHS QP2 2N7002 RoHS RP31 0603 12K 1 RP31 0603 12K 1 RP6 0603 47K 5 RP6 0603 47K 5 1 2 ZDP2 BZT52 C5V1S RoHS ZDP2 BZT52 C5V1S RoHS 1 RP8 0603 100K 5 RP8 0603 100K 5 RP26 0603 5 6K 1 RoHS RP26 0603 5 6K 1 RoHS 1 RP43 open RP43 open RP17 0603 4 75K 0 1 RP17 0603 4 75K 0 1 CP13 0603 100n 25V Y CP13 0603 100n 25V Y 1 3 2 QP10 2N7002 RoHS QP10 2N70...

Page 72: ...0K 5 RoHS RA1 0603 100K 5 RoHS RA20 0603 1K 5 RoHS RA20 0603 1K 5 RoHS CA5 0603 47p 50V N ROHS CA5 0603 47p 50V N ROHS RA2 0603 100K 5 RoHS RA2 0603 100K 5 RoHS CA11 0603 220n 25V Y RoHS CA11 0603 220n 25V Y RoHS CA1 16CV220AX RoHS CA1 16CV220AX RoHS RA19 0603 10K 5 RoHS RA19 0603 10K 5 RoHS CA16 0603 220n 25V Y RoHS CA16 0603 220n 25V Y RoHS CA6 0603 47p 50V N ROHS CA6 0603 47p 50V N ROHS LA3 MCB...

Page 73: ...1 2 R177 OPEN R177 OPEN 1 OE1 OE1 1 ESTH1 ESTH1 1 2 R162 Open R162 Open C44 0603 100n 25V Y C44 0603 100n 25V Y 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 CN3 FH12 45S 0 5SH CN3 FH12 45S 0 5S...

Page 74: ... Y C63 1206 22u 10V Y R36 OPEN R36 OPEN R68 0603 0R 5 R68 0603 0R 5 C53 1206 22u 10V Y C53 1206 22u 10V Y 1 VCN1 VCN VCN1 VCN C65 0603 100n 25V Y C65 0603 100n 25V Y R43 0603 10 2R 1 RoHS R43 0603 10 2R 1 RoHS C90 open C90 open 1 GMA5 GMA5 GMA5 GMA5 R45 0603 165R 1 RoHS R45 0603 165R 1 RoHS C60 0603 100n 25V Y C60 0603 100n 25V Y GND 1 VO 3 3V 2 VI 5V 3 VO 3 3V 4 U5 AMC1117 3 3SK U5 AMC1117 3 3SK ...

Page 75: ... 24 OCH4P_RS 52 OCH4N_RS 51 ECH9N_RS 29 ECH9P_RS 30 ECH10N_RS 31 ECH10P_RS 32 ECH11N_RS 33 ECH11P_RS 34 ECH8P_RS 28 ECH8N_RS 27 OCH1N_RS 41 OCH1P_RS 42 OCH2N_RS 43 OCH2P_RS 44 OCH3N_RS 45 OCH3P_RS 46 OCH0P_RS 40 OCH0N_RS 39 OCH5N_RS 53 OCH5P_RS 54 OCH6N_RS 55 OCH6P_RS 56 OCH7N_RS 57 OCH7P_RS 58 ECH4P_RS 18 ECH4N_RS 17 OCH9N_RS 63 OCH9P_RS 64 OCH10N_RS 65 OCH10P_RS 66 OCH11N_RS 67 OCH11P_RS 68 OCH8...

Page 76: ...CLK 23 CLK 24 SHELL1 31 SHELL2 32 P1 67351 4004 P1 67351 4004 R1 0603 100R 5 NC R1 0603 100R 5 NC NC1 1 NC2 2 NC3 3 GND 4 SDA 5 SCL 6 VCLK 7 VCC 8 U1 AT24C02 10T1 2 7 U1 AT24C02 10T1 2 7 1 2 D2 1N4148WS D2 1N4148WS 1 2 D1 1N4148WS D1 1N4148WS R167 0603 47K 5 R167 0603 47K 5 R4 0603 10K 5 R4 0603 10K 5 R2 0603 100R 5 NC R2 0603 100R 5 NC C2 0603220KV05T RoHS C2 0603220KV05T RoHS TP 1 DVI_5V1 TP DVI...

Page 77: ...5T RoHS C15 0603220KV05T RoHS C16 0603220KV05T RoHS C16 0603220KV05T RoHS 1 2 D4 1N4148WS D4 1N4148WS R11 0603 57 6R 1 R11 0603 57 6R 1 C10 0603 10n 25V 7 RoHS C10 0603 10n 25V 7 RoHS 1A 1 1Y 2 2A 3 2Y 4 3A 5 3Y 6 GND 7 Vcc 14 6A 13 6Y 12 5A 11 5Y 10 4A 09 4Y 08 U3 SN74LV14APWR U3 SN74LV14APWR R16 0603 10K 5 R16 0603 10K 5 L3 0603 100R 5 L3 0603 100R 5 R189 0603 3 9K 5 R189 0603 3 9K 5 TP 1 TXD1 T...

Page 78: ...0603 0R 5 1 2 3 Q9 OPEN Q9 OPEN 1 2 3 4 5 6 7 8 CN1 3273 008 10 CN1 3273 008 10 C145 0603 100n 25V Y C145 0603 100n 25V Y R191 OPEN R191 OPEN R190 OPEN R190 OPEN 1 INV_ADJ2 3_3V_X INV_ADJ2 3_3V_X R94 0603 10K 5 R94 0603 10K 5 C501 Open C501 Open 75 ViewSonic Corporation Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 79: ...2R 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 CN2 7101 15 CN2 7101 15 R115 0603 10K 5 R115 0603 10K 5 4 5 3 6 2 7 1 8 LP7 0603 4 22R 5 LP7 0603 4 22R 5 R116 0603 10K 5 R116 0603 10K 5 L34 MCB1608S600H L34 MCB1608S600H 4 5 3 6 2 7 1 8 CP37 0603 4 100n 25V CP37 0603 4 100n 25V L14 MCB1608S600H L14 MCB1608S600H 4 5 3 6 2 7 1 8 RP49 0603 4 10K 5 RP49 0603 4 10K 5 L15 MCB1608S600H L15 MCB1608S600H 76 ViewSo...

Page 80: ...77 ViewSonic Corporation 11 PCB Layout Diagrams Confidential Do Not Copy VA712 1_VA712b 1 ...

Page 81: ... 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 this service manual Reader s basic dada Name Title Co...