ViewSonic VE702m,VS10535 Service manual

Service Manual

ViewSonic VE702m-1

Model No. VS10535

17” Color TFT LCD Display

ViewSonic

(VE702m_SM_939 Rev. 1a Jan. 2005)



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

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.

Disclaimer

ViewSonic makes no representations or warranties, either 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 trademark of ViewSonic Corporation. ViewSonic is a registered trademark of ViewSonic Corporation. All other trademarks used within this document are the property of their respective owners.

03/01/05

Revision History

Documents Number

DCN Number ECR Number

4866

Description of Changes EditorRevision SM Editing Date

Initial Release

A. Lu

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TABLE OF CONTENTS

1. Precautions and Safety Notices

2. Specification

3. Front Panel Function Control Description

4. Circuit Description

5. Adjusting Procedure

6. Trouble Shooting Flow Chart

7. Recommended Spare Parts List

8. Exploded Diagram And Spare Parts List

9. Block Diagram

10. Schematic Diagrams

11. PCB Layout Diagrams

5 9

41 46

51 54 55

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1. Precautions and Safety Notices

1. Appropriate Operation

(1) Turn off the product before cleaning. (2) Use only a dry soft cloth when cleaning the LCD panel surface. (3) Use a soft cloth soaked with mild detergent to clean the display housing. (4) Use only high quality and safety approved AC/DC power cord. (5) Disconnect the power plug from AC outlet if the product is not used for a long period of time. (6) If smoke, abnormal noise, or strange odor is present, immediately switch the LCD display off. (7) Do not touch the LCD panel surface with sharp or hard objects. (8) Do not place heavy objects on the LCD display, video cable, or power cord. (9) Do not use abrasive cleaners, waxes or solvents for your cleaning. (10) Do not operate the product under the following conditions:

- Extremely hot, cold or humid environment.

- Areas susceptible to excessive dust and dirt.

- Near any appliance generating a strong magnetic field.

- Place in direct sunlight.

2. Caution

No modification of any circuit should be attempted. Service work should only be performed after you are thoroughly familiar

with all of the following safety checks and servicing guidelines.

3. Safety Check

Care should be taken while servicing this LCD display. Because 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 inserting or disconnecting from input connector. (3) Wipe off water drop immediately. Long contact with water may cause discoloration or spots. (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 crack if dropped or bumped on hard surface. (6) Since CMOS LSI is used in this module, take care of static electricity and insure human earth when handling. (7) Do not open nor modify the Module Assembly. (8) Do not press the reflector sheet at the back of the module to any directions. (9) In case if a Module has to be put back into the packing container slot after once it was taken out from the

container, do not press the center of the CCFL Reflector edge. Instead, press at the far ends of the CFL

Reflector edge softly. Otherwise the TFT Module may be damaged.

(10) At the insertion or removal of the Signal Interface Connector, be sure not to rotate nor tilt the Interface

Connector of the TFT Module.

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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.

(13) Small amount of materials having no flammability grade is used in the LCD module. The LCD module should

be supplied by power complied with requirements of Limited Power Source (IEC60950 or UL1950), or be

applied exemption.

(14) The LCD module is designed so that the CFL in it is supplied by Limited Current Circuit (IEC60950 or

UL1950). Do not connect the CFL in Hazardous Voltage Circuit.

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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 polarize .

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 : Incorrect Methods :

Place the monitor on a clean & soft foam pad . Place the monitor on foreign objects .

That could scratch the surface of panel

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2. Specification

2-1 General Descriptions

Item Specification Unit

Active Area 337.9 (H) x 270.34 (V) (17.0” diago nal) 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 Pixel Arrangement RGB V ertical Stripe -

LCD panel

Graphic

Performance

Display Color 16.2M color Tran missive Mode Normally White Viewing Angle (H / V) 160 / 120 degree Brightness 350 cd/m

Contrast Ratio 350 LC Response Time (Tr+Tf) 14 (Tr: 4 + Tf: 10) msec Separate Sync. TTL Level Horizontal Sync. Positive / Negative Vertical Sync. Positive / Negative Input Connector D-Sub mini 15 pins Auto Adjust Clock, Phase, H Position & V Position Screen Scaling VGA/SVGA/XGA/SXGA Full Screen Display Power Management VESA DPMS , ENERGY STAR® Compliance Color Adjustment User, 6500K, 7500K & 9300K OSD Language English, French, German, Spanish, Italian, Japanese,

Traditional Chinese, Simplified Chinese,

Russian, Korean,

Power Input AC100~240 (Worldwide) V

Power source

Power Output 19VDC Operation Mode 51 W

Power consumption

Power Saving Mode 3 W

Tilt angle Upward / Downward 20 / 0 degree

Dimension, weight 386.8(W) x 402.45(H) x 213(D), 3.36 mm,

Physical

DCC

Plug & Play Front key

DDC 2B Compliance -

6keys

Picture Mode: 370

Function

Turbo (Brightness Switch)

Text Mode: 200

Economy Mode: 140

Speaker & Audio (Optional) *

1W*2

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2-2 Electrical Specifications

Item Description

Input System RGB Separate

Video Signal

Signal Level Analog RGB (0.7V Input Impedance

75Ω

P-P

)

Synchronization Signal Input System Signal Level Separate Sync: TTL Compliant T imi ng See Appendi x 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

Horizontal Sync. 30 ~ 82 kHz

Synchronization Frequency

Vertical Sync. 56 ~ 76 Hz Input Voltage AC 100~240V (Worldwide) Frequency 50 / 60Hz

Power Supply

Power Consumption 51 W (max) Power Management 3W (max) Lamp Type Cold Cathode Fluorescent Lamp

Backlight

Lamp Quantity 4pcs

Lamp Life Time 40,000 Hrs (min) Plug & Play VESA DDC 2B Compliance Power Management VESA DPMS , ENERGY STAR® Compliance

Power Management Status Power Consumption Screen Recovery Time

Stand-by Suspend

3W or less Within 3 sec

Active-off

Optical Characteristics

2-3

Temperature Humidity AC input voltage Brightness Maximum with OSD setting Contrast Middle with OSD setting Resolution setting 1280 x 1024 @60HZ Color temperature With OSD setting Measuring instrument Topcon luminance colorimeter BM-5A or equivalent Others Before measuring, “Auto Config” & “Auto Balance” must be done in advance

Item Condition

Normal room temperature (25±2℃) 50±10% 100V±2V, 120±2V, 60Hz / 240±2V, 50Hz

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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

z AC-DC Adapter:

Supplier (Model No.) ASIAN / DA-60F19-AA Input Voltage 100 ~ 240VAC Input frequency 50Hz / 60Hz Input Current 1600mA (max) Output Voltage Output Current 3160mA Output Power 60 W (19V / 3.16A) Efficiency AC input 115VAC 80% (min) Inrush Current

(Cold Start at 25℃, Full Load)

z Quick start guide. z User Manual CD-ROM.

Stand-bottom to be set by user:

Insulation resistance: 10MΩ/Min. 300V

Item Description

19VDC±5%

120A Max. / 120V 240A Max./ 240V

/ 50Hz

/ 60Hz

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2-5 Compliant Timing

Video

Sync

< Horizontal > <Vertical >

H-parameters

C B

A: Total period B: Sync. width C: Back porch D: Active video E: Front porch

R PQ

Sync

polarity

Horizontal (dot) Vertical (line) Ite

H V A B C D E O P Q R S

Video Mode

(kHz)

(Hz)

Dot

clock

(MHz) 1 31.469 59.940 25.175 N N 800 96 48 640 16 526 2 33 480 11 2 37.861 72.809 31.500 N N 832 40 128 640 24 520 3 28 480 9 3

VGA 640x480

37.500 75.000 31.500 N N 840 64 120 640 16 500 3 16 480 1

V-parameters O: Total period P: Sync. width Q: Back porch R: Active video S: Front porch

4 35.156 56.250 36.000 P P 1024 72 128 800 24 625 2 22 600 1 5 37.879 60.317 40.000 P P 1056 128 88 800 40 628 4 23 600 1

SVGA 800x600

6 48.077 72.188 50.000 P P 1040 120 64 800 56 666 6 23 600 37 7

46.875 75.000 49.500 P P 1056 80 160 800 16 625 3 21 600 1

8 48.363 60.004 65.000 N N 1344 136 160 1024 24 806 6 29 768 3

VESA

9 56.476 70.069 75.000 N N 1328 136 144 1024 24 806 6 29 768 3

12 63.981 60.020

XGA 1024x768

1152x86

SXG

1280x10

60.023 75.029 78.750 P P 1312 96 176 1024 16 800 3 28 768 1

108.00

67.500 75.000

P P 1600 128 256 1152 64 900 3 32 864 1

79.976 75.025

108.00 P P 1688 112 248 1280 48

135.00 P P 1688 144 248 1280 16

106

3 38 1024 1

106

3 38 1024 1

VGA

720x400 31.469 70.087 28.322 N P 900 108 45 720 27 449 2 35 400 12

TEXT

15 640x480 35.000 66.667 30.240 N N 864 64 96 640 64 525 3 39 480 3

Macintosh

16 832x624 49.725 74.500 57.283 N N 1152 64 224 832 32 667 3 39 624 1 17

1024x768 60.150 74.720 80.000 N N 1330 96 168 1024 42 805 3 31 768 3

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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.

Self Test Function Check (STFC):

 Your LCD monitor provides a STFC function, through which you can check whether

the LCD monitor functions are working properly.

 If your LCD monitor is properly connected, but there is no image showing and the

indicator light keeps orange, please follow the steps below to start STFC.

 Shutdown computer and LCD monitor.  Unplug the signal connector from the back of computer.  Turn the LCD monitor on.

If the image connector is disconnected or damaged, the image shown on following figure will also appear during normal operation.

 Turn off the LCD monitor and reconnect signal cable, and then turn the

computer and LCD monitor on.

 If the LED of the LCD monitor is an orange color after completing the steps above,

please check your VGA card and computer system. Your monitor should be operating properly.

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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.

Power Switch Power On/Off 1 LED Power Indicator

Green: Normal Orange: Power Saving Off: Power Off

2 Auto / Exit Automatically optimize positions, phase & clock when OSD

is not shown Exit the OSD menu when OSD is shown

3 Turbo Quick brightness switching

ѡ/

5 ʊ/ Adjustment when OSD is shown

6 Menu Enter OSD

7 Speaker

Selection or adjustment when OSD is shown Quick brightness adjustment

Quick contrast adjustment

Access sub-menu & selection

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Operate Explanation

ting

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.

 To exit the OSD menu or go back to the previous action by clicking the “Auto/Exit”

button. It will save the change automatically.

 To repeat above steps for changing the setting of other functions.

Color Temp. Selection

Volume Adjustment

V-Position

Image Adjustment

Language Selection

Set

Input Source Selection (optional)

Audio Current Status Source Resolution & Frequency

Color Temp. Status

Input Source Status (Optional)

Notes

 The OSD disappears several seconds after you stop pressing the buttons while

performing an adjustment.

 Any changes are automatically saved in the memory when the OSD disappears.

Turning off the power should be avoided while using the menu.

 Adjustments for clock, phase and positions are saved for each signal timing. Except

for these adjustments, all other adjustments have only one setting which applies to all signal timings.

 The color will change from white to pink while the function is selected.

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Adjustment of

Function Definition

Screen

Primary

Directory

Image

Audio

Color

Language

Settings

Secondary

Directory Brightness Contrast Clock Phase H. Position V. P o si t io n Sharpness

Volume

Mute 9300K 7500K 6500K User/Red User/Green User/Blue

English Français Italiano Deutsch Español

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OSD Timeout OSD Position

Description

Adjust the brightness of the screen. Adjust the contrast of the image. Adjust the clock pulse of the image. Adjust the focus of the image. Move the image left and right on the screen. Move the image up and down on the screen. Adjust the picture sharpness of lower resolutions.

Adjust the volume of the audio.

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.

Select the language you want.

Adjust OSD display time setting. Move OSD display position to any one of the following 5 positions within the overall screen.

Auto Setting Recall

Input Source

Analog

Digital

(Optional)

Direct

You can skip the Menu pages and display an adjustment scale directly by using the following button operations:

 Brightness: Press the Brightness Button when the Menu is not displayed.  Contrast: Press the Contrast Button when the Menu is not displayed.  Auto Setting: Press the Auto Button when the Menu is not displayed.  Turbo: Press the Input Button when the Menu is not displayed.

 Pct: Picture Mode (High brightness)  Text: Text Mode (Normal)  Eco Economy (Brightness of back-light is reduced)  Changing to a lower brightness mode can lessen eye fatigue.  Change from Picture Mode to Text Mode when working with text.  Change from Text Mode to Economy Modes when viewing the screen for long

periods.

Set up to adjust clock, phase and positions automatically. Restore to factory settings

Select Analog input source:

Select Digital input source:

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Hot Keys for Function Controls

[Power on/off] Main Menu

[Auto/Exit] Input toggle (Analog or Digital) or Auto Image Adjust.

[+] or [-] To immediately activate Contrast menu. It should be change to Brightness

OSD by push button [2]

[+] + [-] Recall both of Contrast and Brightness to default

[Power on/off] + [Auto/Exit] Toggle 720x400 and 640x400 mode when input 720x400 or 640x400

mode

[Power on/off] + [+] + [-] White Balance. (Not shown on user’s guide)

[Power on/off] + [-] Power Lock

[Power on/off] + [+] OSD Lock

1.Turn off [Power on/off] button

2. [+] + [-] + [Power on/off] at same

All Mode Reset. It will erase all end users’ setting and restore the factory defaults.

time

3. Press [Menu]

1.Turn off [Power on/off] button

2. [+] + [-] + [Power on/off] at same

Burn in Mode. After entering Burn in Mode, press Power on/off button, you will find the information about this BIOS

time

3. Press [Menu]

Remark: All the short cuts function are only available while OSD off

Hot Keys for Factory Control

1. Turn off [Power on/off] button.

2. Press [+] + [-] + [Power on/off] at same time

3. Press [Menu]

Then you will see the BIOS update picture show in the screen as below.

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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. 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.

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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 zoom and shrink scaling engine, an on-screen display (OSD) controller, digital color controls and an on-chip microcontroller (OCM). With this level of integration, the gm5116/26 devices simplify and reduce the cost of LCD monitors while maintaining a high-degree of flexibility and quality.

receiver, a high 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 receiver converts the LVDS data streams back into 28 bits of CMOS/TTL data with falling edge clock. At a transmit clock frequency of 85MHz, 24 bits of RGB data and 4 bits of LCD timing and control data (HSYNC, VSYNC, CNTL1, CNTL2) are transmitted at a rate of 595 Mbps per LVDS data channel.

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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. 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 sure it can pass test program.

5. Window Shut Down Test Signal: 1280*1024@60Hz Test Pattern:

Checkered Pattern Every One Pixel (50%Green & 50%Blue) Inspection Item: Flicker, Mura

6. Window BG Test Signal: 1280*1024@60Hz

(Refer to Page 22 Figure 5,6)(Refer to Page 22,

Test Pattern:

Window standard pattern Inspection Item: Line Defect, Function Defect & Mura

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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. Black Box Test Signal: 1280*1024@60Hz Test Pattern:

(Refer to Page 21, Figure 3)

Window standard pattern Inspection Item: Bright Dot, Line Defect & Power

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+ 47 hidden pages

ViewSonic VE702m,VS10535 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual