Service manual

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Model No. VS10535

17” Color TFT LCD Display

Service Manual

ViewSonic VE702m-1

ViewSonic



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

(VE702m_SM_939 Rev. 1a Jan. 2005)

Summary of content (68 pages)

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Service Manual ViewSonic VE702m-1 Model No. VS10535 17” Color TFT LCD Display (VE702m_SM_939 Rev. 1a Jan.
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Copyright Copyright ¤ 2005 ViewSonic Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of ViewSonic Corporation.
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TABLE OF CONTENTS 1. Precautions and Safety Notices 1 2. Specification 5 3. Front Panel Function Control Description 9 4. Circuit Description 14 5. Adjusting Procedure 17 6. Trouble Shooting Flow Chart 41 7. Recommended Spare Parts List 46 8. Exploded Diagram And Spare Parts List 51 9. Block Diagram 54 10. Schematic Diagrams 55 11.
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1. Precautions and Safety Notices 1. Appropriate Operation (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) Turn off the product before cleaning. Use only a dry soft cloth when cleaning the LCD panel surface. Use a soft cloth soaked with mild detergent to clean the display housing. Use only high quality and safety approved AC/DC power cord. Disconnect the power plug from AC outlet if the product is not used for a long period of time.
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(11) After installation of the TFT Module into an enclosure (LCD monitor housing, for example), do not twist nor bend the TFT Module even momentary. At designing the enclosure, it should be taken into consideration that no bending/twisting forces are applied to the TFT Module from outside. Otherwise the TFT Module may be damaged. (12) Cold cathode fluorescent lamp in LCD contains a small amount of mercury. Please follow local ordinances or regulations for disposal.
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Correct methods : Only touch the metal-frame of the panel or the front cover of the monitor. Do not touch the surface of the polarize . Incorrect Methods : 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“.
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Correct Methods : Place the monitor on a clean & soft foam pad . Incorrect Methods : Place the monitor on foreign objects .
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2. Specification 2-1 General Descriptions Item Specification Unit 337.9 (H) x 270.34 (V) (17.0” diagonal) mm Driver Element a-si TFT Active Matrix - Pixel Number 1280 x R.G.B. x 1024 pixel Pixel Pitch 0.264 (H) x 0.264 (V) mm RGB Vertical Stripe - 16.2M color Normally White - 160 / 120 degree Brightness 350 cd/m2 Contrast Ratio 350 - 14 (Tr: 4 + Tf: 10) msec TTL Level - Horizontal Sync. Positive / Negative - Vertical Sync.
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2-2 Electrical Specifications Item Video Signal Synchronization Signal Input System Description Input System RGB Separate Signal Level Analog RGB (0.7VP-P) Input Impedance 75Ω Signal Level Separate Sync: TTL Compliant Timing See Appendix 1. Input Connector 15 pins mini D-Sub Video Frequency Bandwidth 135 MHz dot clock Audio (Optional) d=3.5mm stereo mini jack, 1W/ch Synchronization Frequency Power Supply Backlight Horizontal Sync. 30 ~ 82 kHz Vertical Sync.
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2-4 Accessories z Power Cable: 1.8m Rating: 10A, 250V z Signal Cable: D-sub mini 15pin, 1.8m z Audio Cable (Optional): 1.8m Jacket: OD 3.0mm Insulation resistance: 10MΩ/Min. 300VDC z AC-DC Adapter: Item Description Supplier (Model No.) ASIAN / DA-60F19-AA Input Voltage 100 ~ 240VAC Input frequency 50Hz / 60Hz Input Current 1600mA (max) Output Voltage 19VDC±5% Output Current 3160mA Output Power 60 W (19V / 3.16A) Efficiency AC input 115VAC 80% (min) Inrush Current 120A Max.
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2-5 Compliant Timing < Horizontal > Video Sync H-parameters B D C E A Ite m V-parameters P A: Total period Q R O: Total period O B: Sync. width P: Sync. width C: Back porch Q: Back porch D: Active video R: Active video E: Front porch S: Front porch fH fV (kHz) (Hz) Video Mode S Sync Dot polarity clock (MHz) H V Horizontal (dot) A B C 48 D Vertical (line) E O P Q R S 1 31.469 59.940 25.175 N N 800 96 640 16 526 2 33 480 11 2 VGA 640x480 37.861 72.
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3. Front Panel Function Control Description Auto Adjust Though your computer system can identify the new LCD monitor system, the Auto Adjust function can be as to enhance the display. To enter adjust mode, please refer to “OSD Control”. Turn the computer and LCD monitor on. Press ‘Auto’ button to start Auto Adjust. The LCD monitor will start the Auto Adjust process automatically for 10 consecutive seconds, where you will notice the image change as the Auto Adjust is working.
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OSD Control Keypad Button Definition Thanks to the user-friendly design of OSD (On Screen Display), you can adjust your monitor by the keypads in the front of the monitor.
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Operate Explanation Your LCD has been adjusted to its optimal status before shipment. You can also adjust the image in accordance with the following illustrations and steps. Press the “Menu” button to start the OSD feature. Click the “+” or “-“ button to select the function to be adjusted. Click the “Menu” button to access into the function to be adjusted. Click the “+” or “-“ button to change the current setting of the function.
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Adjustment of Screen Function Definition Primary Directory Image Secondary Directory Brightness Contrast Clock Phase H. Position V. Position Sharpness Audio Volume Adjust the volume of the audio. Mute 9300K 7500K 6500K User/Red User/Green User/Blue Set up the audio to be mute on or off. Set up the color temp. to be 9300K white color. Set up the color temp. to be 7500K white color. Set up the color temp. to be 6500K white color. Adjust red/green/blue gain.
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Hot Keys for Function Controls [Power on/off] [Auto/Exit] [+] or [-] Main Menu Input toggle (Analog or Digital) or Auto Image Adjust. To immediately activate Contrast menu. It should be change to Brightness OSD by push button [2] [+] + [-] [Power on/off] + [Auto/Exit] Recall both of Contrast and Brightness to default Toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode [Power on/off] + [+] + [-] White Balance.
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4. Circuit Description Circuit Description 1. Power supply (DC/DC Converter) The AT1741 is 2-channel PWM switching regulator controllers that 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.
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2. Flash Memory The F29C51001T/F29C51001B is a 1 Megabit, 5.0 Volt-only Flash Memory organized as 131,072 bytes of 8 bits each. This device is designed to use a 4.7 Volt to 5.3 Volt power supply to perform in-system programming. The 1 Megabit memory array is divided 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.
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3. GM5120 The gm5116/26 is a graphic processing IC for Liquid Crystal Display (LCD) monitors at XGA/SXGA resolution. It provides all key IC functions required for the highest quality LCD monitors. On-chip functions include a high-speed triple-ADC and PLL, Ultra-Reliable DVI T M receiver, a high quality zoom and shrink scaling engine, an on-screen display (OSD) controller, digital color controls and an on-chip microcontroller (OCM).
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5. Adjusting Procedure A. Function Test and Alignment Procedure 1. All Modes Reset You should do “All Model Reset” (Refer to Chap 3. Hot Keys for Function Controls) first. This action will allow you to erase all end-user’s settings and restore the factory defaults. 2. Auto Image Adjust The Auto Adjust is aimed to offer a best screen quality by built-in ASIC. For optimum screen quality, the user has to adjust each function manually. A.Turn the computer and LCD monitor on. B.
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7. 25 Gray Test Signal: 1280*1024@60Hz Test Pattern: Full Screen 25% White (Gray) Inspection Item: Particle, Line Defect & Mura 8. 50 Gray Test Signal: 1280*1024@60Hz Test Pattern: Full Screen 50% White (Gray) Inspection Item: Bright Dot, Particle, Line Defect & Mura 9. White Box Test Signal: 1280*1024@60Hz Test Pattern: (Refer to Page 22, Figure 7) Window standard pattern Inspection Item: Particle, Line Defect, Power, Image Remain & Mura 10.
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11. RED Test Signal: 1280*1024@60Hz Test Pattern: (Refer to Page 21, Figure 4) Full Screen Red Inspection Item: Bright Dot, Partial & Line Defect 12. Green Test Signal: 1280*1024@60Hz Test Pattern: Full Screen Green Inspection Item: Bright Dot, Partial & Line Defect 13. Blue Test Signal: 1280*1024@60Hz Test Pattern: (Refer to Page 22, Figure 6) Full Screen Green Inspection Item: Bright Dot, Partial & Line Defect 14.
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15. Gray_Scale_0 -100_H256 Test Signal: 1280*1024@60Hz Test Pattern: (Refer to Page 21, Figure 2) Horizontal 64(256) Gray Scale (Up → Down，From 0 to 100% White) Inspection Item: Line Defect & Function Defect 16. Block Window Test Signal: 1280*1024@60Hz Test Pattern: Black block at the center Inspection Item: Cross Talk & Optical Character 17.
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18.
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Figure 5 Figure 5 Figure 6 Figure 7 Figure 8 Confidential - Do Not Copy ViewSonic Corporation 22 VE702m
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B. BIOS update procedure BIOS Update User Guide For ViewSonic BIOS Update Flow for Genesis 1. P rogram： 1.1 Hardware Installation •RS232 cable（9 Pin） •D_Sub cable（15Pin） •12V Power supply Monitor Set •RS232 to D_Sub transfer BD PC optional 12V RS232 to PC 1.2 Join R232, monitor cable, and adapter. Detail, see the example picture as below.
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1.3 Software A. Please download the file “ Genesis” from CMO E-Sir system. There are ISP & BIOS two files, kindly see as below. a) ISPACK.EXE: Main program GProbe4.2.0.3.exe b) Ancillary .ISPACK.EXE ：Description program GProbe4.2.0.3_gm5126.exe 1.4 Installation： A. Please install the programs respectively as below. GProbe4.2.0.3.exe GProbe4.2.0.3_gm5126.exe Before Setup produce GProbe 4 file . Please set at ISP & BIOS software file. B. I S & BIOS software file to be about to produce the next.
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1.6. Open ISP.Gprobe while parameters set up have been completed. ISP.GProbe 1.7. You will see the picture as below.
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1.8. Execute the main program ( Grope ). Choose the item for parameter link while program execution 1.
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1.
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1.11 Execute Pre.txt ：Input 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.
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1.12 Please check the entity connection and execute Gprobe 4 again once Debug Mode did not show up ISP Program execution：Input BATCH ( update of BIOS Rev) .TXT Key “BIOS Rev.” which you want here. This is the “BIOS update total spending time ”. ※ If failed, Please don’t turn off power. Repeat do it again, from step 6 to step 7. 1.13 When everything is done. Please turn off the power and rest art it again. Check Factory Mode and make sure it already be updated.
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C. Monitor Assembly and Disassembly 1.
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2. Separate Rear Cover (Rear Case Assy) Loosen and remove 5 screws. Separate Bezel hooks to take Bezel and Rear Cover apart Step 2 : Separate Bezel hooks to take Bezel and Rear Cover apart. Step 1 : Loose and remove 5 screws.
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3. Remove Power Board 1. Remove the Tinfoil 2.
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10. Separate Bezel Assy Step 1 : Lift up LCD module and remove Bezel 11.
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12.
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6.
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Defect Mode Failure Analysis A Repair Testing “ Panel Chan e” Should be Performed to Level 3 Repair stage Flicker Check PCB AD/B Change P/B Change Gray value display R.G.
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Defect Mode Failure Analysis Repair Testing ※ “ Panel Change” Should be Performed to Level 3 Repair stage ON/OF No Power Abnormal Check PCB AD/B Change P/B Change CNT/B Change Check Wire PW cable Change OSD cable Change LED display abnormal LED Off Check PCB AD/B Change LED Dark P/B Change LED Abnormal OSD cable Change LED Flicker Check Wire Power wire connector Cable change Abnormal Keyboard Unavailable Check PCB AD/B Change P/B Change Check Wire OSD cable Change NG TEST Next Step
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Defect Mode Failure Analysis Repair Testing ※ “ Panel Change” Should be Performed to Level 3 Repair stage Can’t Input Check PCB AD/B Change Abnormal BIOS CNT/B Change &OSD Can’t Reader Other Abnormal Display Display Shut Check Wire Check PCB Down D-sub cable change AD/B Change P/B Change CNT/B Change Display flicker Check Panel Panel Change Check PCB AD/B Change (tapping ) CNT/B Change Check Panel P/B Change NG TEST Next Step Completed Confidential - Do Not Copy ViewSonic Corpor
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u Trouble Shooting Analysis Check the information in this section to see if the problems can be solved before requesting repair. Note：The consumers are only allowed to solve the problems described as below. Any unauthorized product modification, or failure to follow instructions supplied with the product will end the warranty immediately. l l No image u Make sure power button is ON. u Check whether the LCD monitor and computer power cords are plugged and whether there is a supply of power.
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7. Recommended Spare Parts List RECOMMENDED SPARE PARTS LIST (VE702m-1) ViewSonic Model Number: VS10535 Rev: 1a Description Item Adaptor(AC/DC),60W,19V,3.16A,UP060B1190-01B,POTRANS Accessories: 1 Ref. P/N 2719060199 Q'ty A-00000457 Power Cord,UL,SVT#18/3C,75 degreeC,LP-30B+LS-13,L=1830+/50mm,Black,Linetek,18AWG,No Bag DC/AC Inverter,TWS-444-971,2560V(min)/5.5mA(type),Sumida A-00000458 32E1818015 1 B-00000459 2714000016 1 4 PCBA For A170E2-T,A170E2-H-K,Rev.
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BOM LIST (VE702m-1) ViewSonic Model Number: VS10535 Rev: 1a Item 1 2 3 4 5 6 7 ViewSonic P/N #N/A #N/A E-00000565 #N/A #N/A #N/A #N/A 9 #N/A Description 17" Common BOM,E5,72%,Scan COG TFT Rev.C COG,Scan,Himax:HX8607APD400,256/263Ch LCD Panel , For 17.0" LCM, SXGA COG ACF,AC-8405Z-23,1.
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Item 59 60 61 62 63 64 65 66 67 ViewSonic P/N #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A ReferenceP/N 01016F3621 01016F5621 01016F6221 01016F1031 01016F1232 01016F1831 01016F3931 01018E2401 505050761 68 #N/A 050K102762 69 #N/A 050K472761 70 #N/A 050K103561 71 #N/A 050K103761 72 #N/A 050K683461 73 #N/A 050Z224562 74 #N/A 050Z474561 75 #N/A 505470761 76 #N/A 505221761 77 #N/A 050Z015561 78 #N/A 050Z015762 79 #N/A 050Z016361 80 #N/A 050Z016482 81 #N/A 050Z225483 8
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Item ViewSonic P/N ReferenceP/N 102 #N/A 060Z410451 103 #N/A 104 #N/A Description Chip Capacitor Array,MLCC,Y5V,0603*4,100nF,25V,-20%~+80% 210431CCMS IC(APZS Regulator),LM431CCM3,SOT-23,NS IC(Regulator),LX8117-33CST,3.3V/0.8A,SOT210LX8117S 223,Microsemi 105 #N/A 210172233S IC(Regulator),AIC1722-33CX,3.3V/0.3A,SOT-89,AIC 106 #N/A 2101084S3O IC(Regulator),L1084S3,ADJ/5.0A,TO-263,NIKO-SEM 107 108 #N/A #N/A EEPROM,AT24C16N-10SI-2.
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Item ViewSonic P/N 159 #N/A 160 B-00000460 161 #N/A 162 #N/A ReferenceP/N Description 10B1700043 Software(BIOS),A170E2,RSDS,Ver.17E2TG2005,CM C,Analog+Audio,CheckSum:ISP(B058),HiLo(3B16) Location 163 #N/A 164 #N/A 165 #N/A 166 167 168 169 170 #N/A DC-00000551 #N/A DC-00000549 C-00000467 171 #N/A 172 173 #N/A #N/A PCBA For A170E2-T,A170E2-H-K,Rev.02,Rigid,20201,(turn key) 34A17K2201 PCB For A170E2-H-K,Rev.
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8.
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EXPLODED PARTS LIST (VE702m-1) ViewSonic Model Number: VS10535 Rev: 1a Description Item ViewSonic P/N 1 C-00000462 ReferenceP/N 40A17299A1 2 M-00000558 41A1769104 Metal Frame Front Assy,A170E1,Tin Plate,t=0.4mm,For New Panel 3 HW-00000553 42A9930008 Screw,M3*P0.5*4,f 5.5*2,Steel 4 E-00000565 L3H007XXXX 5 M-00000566 6 B-00000461 44A1713023 35A17S0216 LCD Panel , For 17.
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Packing for shipping ViewSonic Model Number: VS10535 Rev: 1a Item 1 2 3 4 5 6 7 Confidential - Do Not Copy ViewSonic Corporation 53 VE702m ViewSonic P/N E-00000565 P-00000564 P-00000565 P-00000562 P-00000563 P-00000566 DC-00000550 PACKING PARTS LIST (VE702m-1) Ref.P/N L3H007XXXX 7841719911 7841749915 7841725265 7841535161 7841749914 7741729166 Description LCD Panel , For 17.0" LCM, SXGA PE Foam Bag,Protector,490*560*0.
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9. Block Diagram Speaker OSD Key Pad Audio Out Audio In 3.
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10.
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VIN_19V1 LP1 MCB1608U121E LP2 MCB1608U121E LP3 MCB1608U121E VIN_19V 1 V5A 1 VAA 1 VGH 1 VIN_19V TP V5A1 DC/DC V5A TP VAA VAA1 [INV_GND] VIN_19V TP VGH VGH1 TP VGL RP51 Open VGL1 DP1 CP1 3 DP2 1 1 1206/2.2u/50V/Y/E VAA1 CP5 1210/1u/50V/7/PbF 2 6 2 ?? CP16 0603/62K/1% NON1 RP40 1 CP17 0603/10n/25V/7/RoHS 0603/100K/5% RP58 0805/1u/16V/Y/C/RoHS GV476M016S0ANE010/RoHS 0603/100n/25V/Y 1210/4.
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AUDIO BOARD V5A AU5V LA1 LA2 V5A OPEN MHC1608S221N CA1 CA2 + 16CV220AX 0603/100n/25V/Y [GND_POWER] PA1 2 10 2 10 11 3 1 11 3 1 GND_POWER LA3 MCB1608S600H PC_L LA4 LA5 MCB1608S600H HS600 PC_R AU5V 2SJ-05131N13 CA5 CA3 CA4 OPEN OPEN AU5V CA6 AU5V 0603/47p/50V/N 0603/47p/50V/N RA1 CA7 0603/100K/5% 21 VR 7 PC_R RA9 CA11 0603/20K/5% 0603/20K/5% CA16 0603/220n/25V/Y RA4 0603/220n/25V/Y RA10 0603/20K/5% 0603/20K/5% HP Sense VDD VDD VDD RA2 RA3 DC Vol Left Gain 2 18 1
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CN4 V33B 4 S809 NC V33B VSS 3 VDD 2 VSD 1 MHC2012S420R OUT R162 1210/10u/16V/Y L20 GMA1 GMA2 GMA3 GMA4 GMA5 Open 1 XAO 2 C256 U17 C255 OPEN Open 2 C40 2 + C39 1 1 2 L19 V33B Td VSA OPEN 0603/100n/25V/Y MHC2012S420R GMA6 GMA7 GMA8 GMA9 GMA10 VGD + C41 EG0N EG0P EG1N EG1P EG2N EG2P C42 1210/10u/16V/Y 0603/100n/25V/Y EB0N EB0P EB1N EB1P EB2N EB2P L21 MCB1608U121E VGH_P + C43 C44 1210/10u/25V/Y ESTH 1 VGH VCOM VCOM VCOM VCOM R177 OPEN 0603/100n/25V/Y 2 VGH 45
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9.83V VPREF1 VPREF V5A 1 POWER BOARD R30 0603/5.1R/1% L25 MHC2012S420R VS1 9.6V U4 3 V5A AIC1722-33CX Vout 1 Vin 0603/100n/25V/Y GMA1 1210/10u/16V/Y 0603/100n/25V/Y 1 VAA VOP MHC2012S420R AMC431BDBT 3 1 OPEN VSCOM 2 R38 1210/10u/16V/5 0603/100n/25V/Y 1 2 1 0603/18K/1% R40 2 0603/0R/5% 1 0603/100n/25V/Y R41 1 2 1 0603/6.2K/1% C68 7.33V C61 GMA4 VI(5V) C62 1206/22u/10V/Y R37 0603/147R/1% OPEN 2 AMC1117-3.3SK V33C1 3 2 4 VO(3.3V) VO(3.
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16 TXD1 TXD ANALOG INPUT BOARD 1 TXD TXD 11 TP GSDAI 12 G_HSYNC 13 0603220KV05T/RoHS G_VSYNC 14 C4 RXD1 RXD 1 TP GSCLI GRAI L1 GRAI 1 6 2 7 3 8 4 9 5 10 15 GGAI GBAI RXD RXD VGA_5V C5 17 89263-6762 JP1 0603220KV05T/RoHS 0603/100R/5% R6 L2 0603/100R/5% 0603/10n/25V/7/RoHS C7 0603/57.6R/1% 0603/10n/25V/7/RoHS C8 0603/10n/25V/7/RoHS RED+ R7 GGAI C6 BK1608HS121 R8 BK1608HS121 GREEN+ R9 C9 0603/57.
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VOL_MUTE1 V33C 3_3V_DVDD L30 3_3V_DVDD1 MHC2012S420R V33C 1 C103 C109 1206/22u/10V/Y C110 C111 C112 C113 C114 VOL_MUTE 1 PANEL_ON/OFF 1 INV_ON/OFF 1 VCM_PWM 1 VOL_ADJ1 VOL_ADJ 1 TP C115 PANEL_ON/OFF1 3_3V_DVDD 0603/100n/25V/Y 0603/100n/25V/Y 0603/100n/25V/Y 0603/100n/25V/Y 0603/100n/25V/Y 0603/100n/25V/Y 0603/100n/25V/Y 2_5V_VDD GM5126 INV_ON/OFF1 C123 C124 C125 C126 C127 C128 C129 0603/100n/25V/Y 0603/100n/25V/Y 0603/100n/25V/Y 0603/100n/25V/Y 0603/100n/25V/Y 0603/10
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INVERTER I/F INV_ADJ2 INV_ADJ CN1 3273-008-10 INV_ON/OFF INV_ADJ C501 V33A Open VIN_19V R190 OPEN 0603/1K R191 OPEN 0603/3.
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OSD INTERFACE V33A R116 0603/10K/5% LP7 5 6 7 8 5 6 7 8 LP8 SOURCE_SELECT AUTO_ADJ MENU KEY_DOWN KEY_UP LED_G LED_O PWR_SW L14 L15 L34 L35 CN2 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 MCB1608S600H MCB1608S600H MCB1608S600H MCB1608S600H CP37 0603*4/100n/25V 5 4 6 3 7 2 8 1 AUDIO/R+ AUDIO/RAUDIO/L+ AUDIO/L- 0603*4/22R/5% 4 3 2 1 4 3 2 1 0603*4/22R/5% Confidential - Do Not Copy ViewSonic Corporation 63 VE702m CP38 0603*4/100n/25V 5 4 6 3 7 2 8 1 R115 0603*4/10K/5% 0603/10K/5% 4 3 2 1 RP49 5 6 7
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*Readers Response* Dear Readers: Thank you in advance for your feedback on our Service Manual,which allows continuous improvement of our products. We would appreciate your completion of the Assessment Matrix below, for return to ViewSonic Corporation. Assessment A.What do you think about the content after reading VE702m Service Manual? U nit Ex cellent Fair G ood Bad 1. Precautions And Safety Notices 2. Specification 3. Front Panel Function Control Description 4. Circuit Description 5.