ViewSonic VE920m Servisní příručka Strana 1

Service Manual ViewSonic VE920m-1 VE920mb-1 Model No. VS10931 19” Color TFT LCD Display (VE920m-1_VE920mb-1_SM Rev. 1b Aug. 2006) ViewSonic 381 Brea

7Timing Table Item Timing Analog Digital 1 640 x 350 @ 70Hz, 31.5kHz Yes No 2 640 x 400 @ 60Hz, 31.5kHz Yes* No 3 640 x 400 @ 70Hz, 31.5kHz

8 3. Front Panel Function Control Description Front Panel Hardware Controls Power Switch (Front Head) Power Control, soft Power Switch. Power LED (F

9Main Menu Controls Auto Image Adjust*1 Contrast/Brightness*2*4 Audio Adjust Volume*4, Mute*4 Color Adjust sRGB, 9300K, 6500K(default), 5400, 5000,

10 Function descriptions OSD Lock short cuts function for the buttons The OSD lock will be activated by pressing the front panel control buttons "

11AUDIO INTERFACE (SPEAKER SPECIFICATION) Line input connection 3.5 mm stereo jack Line input signal 1.0Vrms@1kHz Line input impedance 10k ohm Maxi

123. OSD Table Layer 1 Layer 2 Layer 3 Auto Image Adjust Contrast (+ / -) Contrast/Brightness Brightness (+ / -) Volume (+ / -) Aud

134. Circuit Description The TSUM57AK is total solution graphics processing IC for LCD monitors with panel resolutions up to SXGA. It is configured wi

145. Adjustment Procedure A. Function Test and Alignment Procedure 1. All Modes Reset You should do “All Model Reset” (Refer to Chap 3. Hot Keys for F

158. 50 Gray Test Signal: 1280*1024@60Hz Test Pattern: Full Screen 50% White (Gray) Inspection Item: Bright Dot, Particle, Line Defect & Mura

1615. Function Test Display pattern Item Pattern Description Remark 1 Gray_Scale_0-100_V Vertical 64 (256) Gray Scale (右→左，From 0 to 100% White) Fig

i Copyright Copyright © 2006 by ViewSonic Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed,

17 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 ViewSonic Corporation Confidential - Do Not Copy V

18BIOS update procedure 1. To setup ISP environment Hardware: PC or Notebook , Parallel(Printer) cable , ISP tool( Fig 1) Software: ISP driver .

192. Install ISP 2.1 User could download ISP driver and PORT95NT install file from Myson Century website( //www.myson.com.tw ) 2.2 After extracting

20 2.4 Keep default setting or press “Change” button for selecting the path that you want , and then press“Next”button to continue, see Fig 2.4.

212.6 The Installer Information shows package warning, press “Ignore” button to continue, see Fig 2.6. Fig 2.6 2.7 Installation has finished, pres

223. ISP security code 3.1 After installation, we could find the shortcut in the setting path or the program bar (default setting), see Fig 3.1. Fi

233.3 The warning is used to remind user of that different CPU rate may cause ISP function fail(it is limited by IIC protocol), press “確定” button, s

243.5 At least 2 Command No of security code, see Fig 3.5, and different security code between hardware ISP and software ISP. The security code of sof

253.6 Fig 3.6 shows the setting for security code of hardware ISP, it needs 4 Command No, and key in command sequentially for 94, 94, AC, CA, 53.

263.7 Fig 3.7 shows the setting for security code of software ISP, it needs 2 Command No, and key in command sequentially for 7C, 4C, 77. The Comma

ii TABLE OF CONTENTS 1. Precautions and Safety Notices 1 2. Specification 4 3. Front Panel Function Control Description 8 4. Circuit De

274. Use ISP to program MCU 4.1 Select MTV type first, load the binary or Intel hex file that you want to program into the MCU, and select “Auto” ite

285 Use ISP to read MCU content 5.1 Only software ISP could read the MCU content, it is according to program the boot code while coding. The limitatio

295.2 If user uses hardware ISP to read MCU content, it shows as Fig 5.2. Fig 5.2 ViewSonic Corporation Confidential - Do Not Copy VE920m-1_V

306 Re-entry the ISP Mode When you could not select or click ‘Reset MCU’ button and enter ISP mode again, you refer the message as below: ViewS

31 Note: (1)Disable the ‘Enter ISP Mode’ option to avoid the error message display. (2)If you using the MTV312M64 or before MCU serials, the MCU wi

327. Boot code of ISP 7.1 Hardware ISP (1) Without boot code (2) Fixed security code: 94, 94, AC, CA, 53 (3) Attention to the pin of HSCL (1) and HSD

337.4 The followings show the relationship between the code and the security code. ViewSonic Corporation Confidential - Do Not Copy VE920m-1

348. ISP Adaptor Schematic 9. Adatptor Linking The Monitor Set Connect with Printer Cable 25Pins to 25Pins PC/HOST Connect with VGA Cable 15Pins t

35Packing Procedure 1.1 Paste protection film to protect the monitor. (Figure 1) 1.2 Put the monitor in the PE bag and seal the bag with tape. (Fig

Monitor Assembly and Disassembly 5.1 Separate Stand Assy 5.1.1 Remove Seat Assy 5.1.2 Separate Stand Assy Step 1 : Pre

11. Precautions and Safety Notices 1. Precautions and Safety Notices 1. Appropriate Operation (1) Turn off the product before cleaning. (2) Us

5.2 Separate Rear Cover (Rear Case Assy) Separate Bezel hooks to take Bezel and Rear Cover apart. Step 2 : Loos

5.3 Remove Power Board 5.3.1 Remove FFC 5.3.3 Remove Metal Cover 5.3.2 Lift up LCD module and remove Bezel Step 1

Step 5 : Remove 2 pieces of Backlight wires. Step 2 : Loose and remove 2 screws Step 3 : Loose and remove 2 screws

Step 6 : Remove the PCBA Cover 5.3.4 Remove Power PCBA Step 1 : Remove 2 pieces of Backlight wires. Step 2 : Loose and

5.4 Change New Power Board 5.5 Remove AD PCBA 5.5.1 Remove FFC Step 1 : Remove 2 FFCs Step 1 : Insert New P

Step 5 : Completed Step 3 : Loose and remove 4 screws Step 4 : Remove AD PCBA 42 ViewSonic Corporation Confidential - Do No

5.6 Change New AD PCBA Step 1 : Insert New AD PCBA Step 4 : Insert 2 FFC Completed Step 2 : Fasten 4 screws Step 3 : Insert FFC 43 V

5.7 Metal Cover Assembly Step 1 : Place the PCBA Cover Step 2 : Insert 2 pieces of Backlight wires. Step 3 : Join the t

Step 7 : Place LCD module to LCD Bezel. Step 5 : Fasten 2 screws Step 6 : Fasten 2 screws Step 8 : Insert FFC 45 V

5.8 Remove OSD PCBA Step 3: Completed Step 1: Separate both Audio Cable Step 2 : Take OSD PCBA apart 46 ViewSonic Corporation Confid

2 (4) When the panel surface is soiled, wipe it with absorbent cotton or other soft cloth. (5) Since the panel is made of glass, it may break or

5.9 Change New OSD PCBA 5.10 Rear Cover Assy Assembly Step 1 : Place Rear Cover Step 1 : Place New OSD PCBA Step 2 : In

5.11 Stand Assy Assembly Step 2 : Fasten 2 screws Step 3 : Remove Cover Hinge Step 1: Place Seat Assy Step 2 : Fasten

49 6. Troubleshooting Flow Chart Defect Mode Failure Analysis Repair Testing Flash Dots Bright Dot Dark Dot Backlight Light Leakage Mura Image S

Defect Mode Failure Analysis Repair Testing Check PCBA Power on Display Abnormal Flicker Next Step TES

Failure Analysis Repair Testing Gray Scale Display Abnormal R.G.B Display Abnormal No signal Display

Defect Mode Failure Analysis Repair Testing Horizontal Line Defect Vertical Weak Line Peculiar Smell Check PC

Defect Mode Failure Analysis Repair Testing LED Off No Power LED Dark LED Abnormal LED Flicker Power ON/OFF A

Defect Mode Failure Analysis Repair Testing Abnormal BIOS &OSD Check PCB Check Wire AD/B Change CNT/B Change OSD

Defect Mode Failure Analysis Repair Testing Display Shut Down Check PCBA Check Panel Display Flicker ((tapp

Trouble Shooting Analysis Check the information in this section to see if the problems can be solved before requesting repair. Note：The consumers are

3 Correct methods : Incorrect Methods : Only touch the metal-frame of the panel or the front cover of the monitor. Do not touch the surface of the po

57 7. Recommended Spare Parts List Rev: 1aSerial No. Prefix: Q7TItem ECR/ECNViewSonic P/N Ref. P/NLocation Universal number# Q'ty1 Lips Without

Rev:1a Serial No. Prefix: QEJItem ECR/ECN ViewSonic P/N Ref. P/N Location Universal number# Q'ty1 Accessories:Power CordA-0000205832E1818013 12Co

Rev: 1aSerial No. Prefix: Q7TItem ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty1 N/A MJ0E501K01 19" Semi Product,19E5-

ViewSonic Model Number : VS10931Rev.:1aSerial No. Prefix: QEJItem ViewSonic P/N Ref. P/N Description Q'ty1 N/AMJ0E501K0119" Semi Product,19E

ModelTitleDate Rev:ViewSonic Corporation8. Exploded Diagram and Exploded Parts List61ViewSonic Corporation Confidential - Do Not Copy VE920m-1_VE

ViewSonic Model Number: VS10931Rev: 1aSerial No. Prefix: Q7TItem ViewSonic P/N Ref. P/N Description Q'ty1 N/AMJ0E501K01ISM_A190E3_HAT 12 C-000059

ModelTitleDate Rev:ViewSonic Corporation63 Rev: 1aItem ViewSonic P/N Ref. P/N Location Q'ty1 N/A VE920mLCD Monitor 12 P-000005957841919921 PE Foa

64 9. Block Diagram OSD Key Pad / Audio Out D-sub Analog Video Speaker AC Power LDO Main Board LIPS Backlight LCD Module DC-5V 5V Signal Audio In

10. Schematic Diagrams ModelTitleDate Rev:ViewSonic Corporation65GINSTVOR0NGVOFFSDAOR2NOCLKPVSYNCV18CRINOB0NKEY_UPOG1NVCMVOL1HSYNCEG2PER0PCLK+AD3AUTO

66 ModelTitleDate Rev:ViewSonic CorporationDCV5AVGLVGHVAADCDC_ON/OFFV5AVGHDCDC_ON/OFFVAAVGLV5GND_POWERVGLVGHV5AGND_POWER GND_POWERGND_POWERGND_POWERGN

42. Specification Introduction FEATURES Size 19” Luminance (Typ, cd/㎡) 280 cd/㎡ Contrast Ratio (Typ) 450:1 Colors ( 6 bit + 2 bit FRC) 16.2 M co

67 ModelTitleDate Rev:ViewSonic CorporationDVI INTERFACEV5A_ESDG+B+R-B-R+G-CLK+V5AV5A_ESDCLK-V5AV5A V5A_ESDGND_POWERGND_POWERGND_POWERGND_POWERGND_POW

68 ModelTitleDate Rev:ViewSonic CorporationINVERTER I/FINV_ADJINV_ON/OFFV33CV5GND_INVGND_POWERGND_POWERV33CV33C12 3Q19Q19R198R198R196R196C30C308765432

69 ModelTitleDate Rev:ViewSonic CorporationMCUSDA1SCL1LED5V_ON/OFFLED5V_ON/OFFDDC_CLKDDC_DATSDA1SCL1CSZSCLSDADDC_CLKDDC_DATINTHWRESETAUDIO_ONPANEL_ON/

70 ModelTitleDate Rev:ViewSonic CorporationOSD INTERFACEAUD_RAUD_LAUD_RAUD_LLED_OLED_GLED_OLED_GV5ALED_ORMENUAUTO_ADJPWR_SWAUDIO_ONVOL1OPTION1OPTION2S

71 ModelTitleDate Rev:ViewSonic CorporationPANEL I/FVCOMVCOMVSAPANEL_VGLCKVVGLVCMESTHOEPOLVSDPANEL_VGLVGDVAASTBVSDSTVVGDVGDVGH_PVGHGVOFFXAOPANEL_VGHGV

72 ModelTitleDate Rev:ViewSonic CorporationPOWERVSCMVOPVPREFVOPVAAVSCN_OUTVOPVSCNV33CVPREFV18CVSCM_ADJVCMVCNV33AVCM_PWMGMA7GMA5VS6VS14VS9GMA12VS7GMA9G

73 ModelTitleDate Rev:ViewSonic CorporationSCALERER0NOR1NOB2NGVOFFSTBEB1PEB2PEG0POG1NEG2POSTHOR0PCKVOEER1NOG0PEG1POR0NER2POB2POG0NEB1NOR2POB1NEB0PSTVO

74 ModelTitleDate Rev:ViewSonic CorporationVGAVSIDAT_DDCCLK_DDCHSYNCVSYNCVGA_5VVGA_5VVGA_5VRINGINBINVSYNCGNDRGNDGGNDBDDC_DATDDC_CLKSOGHSYNCDDC_CLKDDC_

11. PCB Layout Diagrams 75ModelTitleDate Rev:ViewSonic CorporationViewSonic Corporation Confidential - Do Not Copy VE920m-1_VE920mb-1 TOP

76 ModelTitleDate Rev:ViewSonic CorporationViewSonic Corporation Confidential - Do Not Copy VE920m-1_VE920mb-1 BOT

5VIDEO INTERFACE Analog Input Connector DB-15 (Analog), refer the appendix A Digital Input Connector N/A Default Input Connector Defaults to the fi

77 ModelTitleDate Rev:ViewSonic CorporationViewSonic Corporation Confidential - Do Not Copy VE920m-1_VE920mb-1 TMSK

78ModelTitleDate Rev:ViewSonic CorporationViewSonic Corporation Confidential - Do Not Copy VE920m-1_VE920mb-1 BMSK

79 ModelTitleDate Rev:ViewSonic CorporationViewSonic Corporation Confidential - Do Not Copy VE920m-1_VE920mb-1 TPATE

80 ModelTitleDate Rev:ViewSonic CorporationViewSonic Corporation Confidential - Do Not Copy VE920m-1_VE920mb-1 TSLK

81 ModelTitleDate Rev:ViewSonic CorporationViewSonic Corporation Confidential - Do Not Copy VE920m-1_VE920mb-1 DRL

82 * Reader’s Response* Dear Readers: Thank you in advance for your feedback on our Service Manual, which allows continuous improvement of our produc

6Power Supply Line Surge Immunity Shall be able to withstand ±2KV (L-L) and ±2.3KV (L-PE) with no damage Power Supply Missing Cycle Immunity Shall