ViewSonic VX1935wm-1 User Manual

Service Manual

ViewSonic VX1935wm-1

Model No. VS11307

19” Color TFT LCD Display

(VX1935wm-1_SM Rev. 1a Sep. 2006)

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

Copyright © 2006 by 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.

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.

Revision History

Revision SM Editing Date ECR Number Description of Changes Editor

1a 9/18/2006 Initial Release Jamie Chang

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TABLE OF CONTENTS

1. Precautions and Safety Notices 1

2. Specification 4

3. Front Panel Function Control Description 8

4. Circuit Description 13

5. Adjustment Procedure 14

6. Troubleshooting Flow Chart 32

7. Recommended Spare Parts List 34

8. Exploded Diagram and Exploded Parts List 37

9. Block Diagram 40

10. Schematic Diagrams 41

11. PCB Layout Diagrams 51

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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) Disconnect the power plug from AC outlet if the product is not used for a long period of

time.

(5) If smoke, abnormal noise, or strange odor is present, immediately switch the LCD

display off.

(6) Do not touch the LCD panel surface with sharp or hard objects.

(7) Do not place heavy objects on the LCD display, video cable, or power cord.

(8) Do not use abrasive cleaners, waxes or solvents for your cleaning.

(9) 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. Power Supply Requirements

The external AC power operating range shall be from 90 to 264Vac

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5. LCD Module Handling Precautions

5.1. 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.

(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, or be applied exemption.

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

Circuit.

Do not connect the CFL in Hazardous Voltage Circuit.

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5.2 Handling and Placing Methods Correct Methods: Incorrect Methods:

1.Take out the monitor with cushions 1.Taking out the monitor by grasping the LCD

panel. That may cause ”Mura”

2.Only touch the metal frame of the LCD panel

or the front cover of the monitor. Do not touch the surface of the polarizer.

2.Surface of the LCD panel is pressed by fingers and that may cause ”Mura”.

3.Place the monitor on a clean and soft foam pad.

3.Placing the monitor on foreign objects. That could scratch the surface of the panel or cause “Mura”.

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2. Specification

FEATURES VX1935

Size 19 " wide

TFTLCD PANEL 1st HSD HSD190MGW1-A

Input Signal

Sync Compatibility

Compatibility

Power Voltage AC 100-240V, 50/60Hz Yes

Consumption Audio 1.5W / THD 0.5% (Max) Yes

Ergonomics

Luminance (Typ) Contrast Ratio (Typ) *1 700:1

Colors 16.2 M (6 bits + 2 bits FRC) Response Time *1 5 ms (on/off) Viewing Angle (H/V) 150 ° / 135 °@ CR>10 Recommend resolution 1440x900@60Hz Analog Yes (75ohms, 0.7/1.0 Vp-p) Digital Yes Separate Sync Yes Composite Sync No Sync on Green No PC Yes Power Mac Yes TV Box (NextVision 6) Yes

On Mode(Max) ≦ 36 W (Energy Star Ver4.0 Tier2)/ Power Off Mode (Max) ≦1 W

Tilt ( 20 ° - -5 °) Yes Swivel No Pivot No Height Adjust No

300 cd/㎡

OSD Control [ 1 ] [ 2 ] [ ][▼] [▲] Yes

Dimension

Weight

Operating Condition

Storage Condition

Regulation

Physical (W x H x D) 450 x 434 x 210mm Package (W x H x D) 545*515*162mm Physical (Net Weight) 5.6 Kg / 12.3 lbs Package (Gross Weight) 6.6 Kg / 14.5 lbs Temperature (℉/℃) 32℉-104℉ / 0℃-40℃

Humidity (%) 20 % - 80 % Temperature (℉/℃) -4℉-140℉ / -20℃-60℃

Humidity (%) 10% - 90 % CB ; MPR II ; UL ; CUL ; FCC-B (ICES) ; TUV-S IRAM ; NOM ; Energy Star ; CE ; NEMKO ERGO ; GOST-R ; HYGIENIC (20 copies) ; SASO ; BSMI ; C-TICK ; PSB ; CCC ; WEEE ; ROHS

z Audio Interface (Speaker Specification)

Line input signal 1.0 Vrms Line input impedance > 10 kOhm Maximum Amp power output (Watt)

Speaker Power rating(Ω/Watt) 8Ω/ 1.5 W (MAX) THD ≦ 8% (Maxmum output @ 1KHZ)

Signal to Noise Ratio 50 dB Frequency response 500 Hz – 20 Khz SPL.

Line input connection

1.2 W (RL=8Ω)

80 ± 3 dB / 10.W‧0.5m

3.5 mm stereo jacks

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Vibration

There should be no audible vibration resonance at volume=100%(input signal within 1.0 Vrms)

Screen image

Connector PC99 requirement Audio in

There should be no affect on the screen image stability under any conditions

Lime Green pantone # 577C

Cable type / length 3.5mm stereo cable / 1.8m length

SPEAKERS STAY ON WHEN THE REST OF THE MONITOR IS IN POWER SAVING

Audio DPMS

NOTE: THERE IS NO GUARANTEE <1 W AT POWER CONSUMPTION IN ACTIVE OFF MODE, WHEN THE AUDIO CABLE IS CONNECTED

z Panel Characteristics:

1st Source Panel

Model number HSD HSD190SGW1-A Type TN TYPE WITH RSDS INTERFACE Active Size 19” WIDE ; 408.24 (H) x 255.15 (V) Pixel Arrangement RGB VERTICAL STRIPE Pixel Pitch 0.2835(H) X 0.2835(H) MM Glass Treatment ANTI GLARE (HARD COATING 3H) # of Backlights 4 CCFL ; TOP & BOTTOM EDGE SIDE Backlight Life 40,000 HOURS (MIN) Luminance (5-point) – Condition: CT = 6500K, Contrast = Max, Brightness = Max, Inverter Current=6.5mA Brightness Uniformity ≧70% ENTIRE AREA (MIN) Contrast Ratio *1 700:1 (TYP), 450:1 (MIN) Color Depth 16.2 MILLION COLORS (6 BITS + 2 BITS

Viewing Angle (Horizontal) @ CR>10

Viewing Angle (Vertical) @ CR>10

Response Time *1 10%-90% @ Ta=25°C

Panel Defects Please see Panel Quality Specifications.

*1 Test conditions: Inverter Current=6.5mA, Color Temp.=User Mode, OSD: Brightness=100%, Contrast=100%

300 CD/M2 (TYP) 240 CD/M2 (MIN AFTER 30 MINUTE WARM UP)

FRC)

Typical: 150º Minimum: 130º @ CR>5 Typical: 170º Minimum: 150º

Typical: 140º MINIMUM: 120º @ CR>5 Typical: 160º

Minimum: 140º

Typical = 5ms (Tr =

1.5 ms,Tf =3.5 ms)

Maxmum = 10ms (Tr =3 ms,Tf =7 ms)

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ELECTRICAL REQUIREMENT

Horizontal / Vertical Frequency

Horizontal Frequency 24 – 80 kHz Vertical Refresh Rate 50 – 75 Hz. Maximum Pixel Clock 135 MHz Sync Polarity Independent of sync polarity.

Timing Table

Mod

1 640×350 @70Hz VGA31.46970.087 25.175 P N 800 96 48 640 16 449 2 60 350 37

2 640×350 @85Hz VGA37.86185.080 31.500 P N 832 64 96 640 32 445 3 60 350 32

3 640×400 @60Hz VGA31.46959.940 25.175 N P 800 96 48 640 16 525 2 73 400 50 4 640×400 @70Hz VGA31.46970.087 25.175 N P 800 96 48 640 16 449 2 35 400 12

5 640×400 @85Hz VGA37.86185.080 31.500 N P 832 64 96 640 32 445 3 41 400 1

6 640×480 @50Hz VGA24.68849.637 19.750 N P 800 64 80 640 16 497 4 10 480 3 7 640×480 @60Hz VGA31.46959.940 25.175 N N 800 96 48 640 16 526 2 33 480 11 8 9 640×480 @72Hz VGA37.86172.809 31.500 N N 832 40 128 640 24 520 3 28 480 9

10 640×480 @75Hz VGA37.50075.000 31.500 N N 840 64 120 640 16 500 3 16 480 1

11 640×480 @85Hz VGA43.26985.008 36.000 N N 832 56 80 640 56 509 3 25 480 1 12 720×400 @70Hz VGA31.46970.087 28.322 N P 900 108 45 720 27 449 2 35 400 12

13 720×400 @85Hz VGA37.92785.039 35.500 N P 936 72 108 720 36 446 3 42 400 1

fH fV Dot clock

Mod

14 720x480@60Hz 31.469 59.940 27.000 N N 858 62 76 720 0 525 6 39 480 0

15 720x576 @50Hz 31.250 50.000 27.000 N N 864 64 12 720 68 625 5 5 576 39

22 1024×768 @50Hz XGA 39.643 49.980 52.000 N P 1312 104 144 1024 40 793 4 18 768 3 23 1024×768 @60Hz XGA 48.363 60.004 65.000 N N 1344 136 160 1024 24 806 6 29 768 3 24 1024×768 @70Hz XGA 56.476 70.069 75.000 N N 1328 136 144 1024 24 806 6 29 768 3 25 1024×768 @75Hz XGA 60.023 75.029 78.750 P P 1312 96 176 1024 16 800 3 28 768 1

27 1024×768 @85Hz XGA 68.677 84.997 94.500 P P 1376 96 208 1024 48 808 3 36 768 1

28 29 1152×870 @75Hz MAC 68.681 75.062 100.000 N N 1456 128 144 1152 32 915 3 39 870 3 SOG can support

30 1280×768@50Hz 39.593 49.929 65.250 N P 1648 128 184 1280 56 793 7 15 768 3 31 1280×768 @60Hz 47.396 59.995 68.250 P N 1440 32 80 1280 48 790 7 12 768 3 32 1280×768 @60Hz 47.776 59.870 79.500 N P 1664 128 192 1280 64 798 7 20 768 3 33 1280×768 @75Hz 60.289 74.893 102.250 N P 1696 128 208 1280 80 805 7 27 768 3

34 1280×768 @85Hz 68.633 84.837 117.500 N P 1712 136 216 1280 80 809 7 31 768 3

35 1280×960 @50Hz 49.405 49.853 83.000 N P 1680 128 200 1280 72 991 4 3 960 3 36 1280×960 @60Hz 60.000 60.000 108.000 P P 1800 112 312 1280 96 1000 3 36 960 1

Resolution (KHz) (Hz) (MHz) H V A B C D E O P Q R S

40×480 @67Hz MAC35.00066.667 30.240 N N 864 64 96 640 64 525 3 39 480 3 SOG can support

Resolution (KHz) (Hz) (MHz) H V A B C D E O P Q R S

800×600 @56Hz SVGA 800×600 @60Hz SVGA 800×600 @72Hz SVGA 800×600 @75Hz SVGA 800×600 @85Hz SVGA 832×624 @74.6Hz MAC

1024×768 @75Hz MAC

1152×864 @75Hz SXGA

fH fV Dot cloc

35.156 56.250 36.000 P P 1024 72 128 800 24 625 2 22 600 1

37.879 60.317 40.000 P P 1056 128 88 800 40 628 4 23 600 1

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

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

53.674 85.061 56.250 P P 1048 64 152 800 32 631 3 27 600 1

49.725 74.500 57.283 N N 1152 64 224 832 32 667 3 39 624 1 SOG can support

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

67.500 75.000 108.000 P P 1600 128 256 1152 64 900 3 32 864 1

ync polarit

Sync

polarity

Horizontal (dot) Vertical (line)

備註

Performance no guarantee Performance no guarantee

Performance no guarantee

備註

Performance no

guarantee

Performance no

guarantee

Performance no

guarantee

Performance no

guarantee

Performance no

guarantee

Performance no

guarantee

Performance no

guarantee

Performance no

guarantee

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Dot

fH fV

Mod

37 1280×960 @75Hz 74.592 74.443 128.895 P P 1728 136 224 1280 88 1002 3 36 960 3

38 1280×1024 @50Hz SXGA 52.679 49.838 80.500 N P 1680 128 200 1280 72 1057 7 23 1024 3 39 1280×1024 @60Hz SXGA 63.981 60.020 108.000 P P 1688 112 248 1280 48 1066 3 38 1024 1 41 1280×1024 @72Hz SXGA 76.020 71.448 130.223 P P 1712 133 248 1280 51 1064 2 38 1024 0 42 1280×1024 @75Hz SXGA 79.976 75.025 135.000 P P 1688 144 248 1280 16 1066 3 38 1024 1 43 1360×768 @60Hz WXGA 47.712 60.015 85.500 P P 1792 112 256 1360 64 795 6 18 768 3

Resolution (KHz) (Hz) (MHz) H V A B C D E O P Q R S

1400×1050 @50Hz WXGA + 1400×1050 @60Hz WXGA + 1400×1050 @60Hz WXGA + 1400×1050 @75Hz WXGA + 1440×900 @60Hz WXGA + 1440×900 @60Hz WXGA + 1440×900 @75Hz WXGA +

54.113 49.965 100.000 N P 1848 144 224 1400 80 1083 4 26 1050 3

64.744 59.948 101.000 P N 1560 32 80 1400 48 1080 4 23 1050 3

65.317 59.978 121.750 N P 1864 144 232 1400 88 1089 4 32 1050 3

82.278 74.867 156.000 N P 1896 144 248 1400 104 1099 4 42 1050 3

55.469 59.901 88.750 P N 1600 32 80 1440 48 926 6 17 900 3

55.935 59.887 106.500 N P 1904 152 232 1440 80 934 6 25 900 3

70.635 74.984 136.750 N P 1936 152 248 1440 96 942 6 33 900 3

Sync

clock

polarity Horizontal (dot) Vertical (line)

備註

Performance no

guarantee

Performance no

guarantee

*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 worse than 75Hz. (Display quality is not guaranteed because the LCD panel supports upto 75Hz)

Primary Presets

1440x900 @ 60Hz

User Presets Number of User Presets (recognized timings) Available: 10 presets total in FIFO configuration Changing Modes

● Maximum Mode Change Blank Time for image stability : 3 seconds (Max), excluding “Auto

Image Adjust” time

● Under DOS mode (640 x 350, 720 x 400 & 640 x 400), it should recall factory setting when

execute “Auto Image Adjust”

● The monitor needs to do “Auto Adjust” the first time when a new mode is detected(See

section “0-Touch™ Function Actions”)

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3. Front Panel Function Control Description

3.1 Short Cuts Function from the button(s)

[1] Main Menu [2] Input toggle (Analog or Digital)

[▼] or [▲] To immediately activate Brightness /Contrast menu.

Hot Keys for Function Controls

[▼]+ [▲] Recall Contrast or Brightness while in the Contrast or

Brightness adjustment, or recall both of Contrast and Brightness when the OSD is not on.

[1] + [2] Toggle 720x400 and 640x400 mode when input 720x400

or 640x400 mode

[1] + [▼] + [▲]

(hold for 3 sec)

[1] + [▼]

(hold for 10 sec)

[1] + [▲]

(hold for 10 sec)

[2] + [ ]

with signal (hold for 3 sec)

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

White Balance. White Balance should set the screen on the pure black and white pattern with 640*480@60Hz resolution. Power Lock (Unlock). User won’t be able to turn off the monitor. OSD Lock (Unlock). It will lock all functions.

Factory Mode (Press [ ] exit factory mode. ) Inter Factory Mode adjust white balance and setting Burn in Mode (On or Off) .

3.2 Front Panel Hardware Controls

Power Switch (Front Head) Power Control, soft Power Switch. Power LED (Front Head) Blue – ON

Front Panel Controls (Head) [ 1 ] [ 2 ] [ ] [▼] [▲]

Reaction Time OSD must fully appear within 0.5s after

Orange – Active Off Dark = Soft Power Switch OFF [ 1 ] Button 1 [ 2 ] Button 2 [ ] Power [▼] Down Arrow Button [▲] Up Arrow Button Note: Power Button, Button 1 and Button 2 must be one-shot logic operation. (i.e. there should be no cycling)

pushing Button 1

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3.3 OSD Menu Controls

Select the menu items shown below by using the up [▲] and down [▼] buttons.

z Main Menu :

z Auto Image Adjust :

To automatically adjust H./ V. Position, Phase adjust and Clock adjust.

REMARK: There may need to select “Fine Tune” function on “Manual Image Adjust” to

optimized Performance for various VGA tolerance.

z Contrast / Brightness :

To adjust the Contrast of the video and the backlight currency.

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z Input Select :

To select the signal sources of the Analog or Digital.

z Audio Adjust :

To adjust the audio volume and mute.

z Color Adjust :

To select the color temperature sRGB, 9300°K, 7500°K ,6500°K, 5400°K or user color.

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z Information:

To display the data about Horizontal / Vertical frequency, Pixel clock, Resolution ,

Model number and Serial No. of the monitor.

z Image Adjust:

Horizontal Size: To adjust the horizontal pixel clock of the video.

H./V. Position: To adjust the horizontal and vertical position of the video.

Fine Tune: To adjust the delay time of data and clock.

Sharpness: To select the picture sharpness of display.

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z Setup Menu::

Language Select: To select one of eight languages.(English, French, German, Italian,

Spanish, Finnish, Japanese, Traditional Chinese, and Simplified Chinese)

Resolution Notice: Enable (on) : OSD will notify the best picture quality resolution change

the resolution to 1440 x 900

OSD Position: To set OSD position.

OSD Timeout: To set the displaying time of OSD.

OSD Background :To select video background brightness.

z Memory Recall:

Restore default settings of Clock, H./V. Position, Phase, Contrast, Brightness, Color temperature, OSD position, OSD timeout and Sharpness, Volume.

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4. Circuit Description

1. Power supply (DC/DC Converter)

This brick convert is the 110-220AC input voltage to 12V AND 5V output for inverter,

audio, panel and system controller use.

It consists of a PWM IC (CM0565R, U101)

2. Scaling controller

The ADC is to convert RGB analog signal to digital signal that scaling chip can

acknowledge.

The HSYNC input receives a logic signal and provides the frequency reference for

pixel clock generation.

The scaling IC is to converts the input signal ranging from VGA to WXGA into WXGA

resolution that panel can acknowledge.

GENERAL DESCRIPTION

The TSUM17AK is a high performance, and fully integrated graphics processing IC solution for LCD monitors with resolutions up to WXGA. It is configured with an integrated triple-ADC/PLL, a high quality scaling engine, an on-screen display controller, a built-in output clock generator, and LVDS display interface. To further reduce system costs, the TSUM17AK also integrates intelligent power management .

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5. Adjustment Procedure

1. Function Test

1.1 Product

- 19” LCD Monitor

1.2 Test Equipment

- Color Video Signal & Pattern (or PC with WXGA resolution and a sound card)

1.3 Test Condition

Before function test and alignment, each LCD Monitor should be run-in and warmed

up for at least 30 minutes with the following conditions: (a) In room temperature, (b) With full-white screen, RGB, and Black (c) With cycled display modes,

640*480 (H=43.27kHz, V=85Hz) 800*600 (H=53.7kHz, V=85Hz) 1024*768 (H=68.67kHz, V=85Hz) 1280*1024 (H=79.97kHz, V=75Hz) 1440*900 (H=70.63kHz, V=75Hz)

1.4 Test Display Modes & Pattern

1.4.1 Compatible Modes Digital Analog

1. 640 x 480 @ 60Hz, 31.5kHz

2. 640 x 480 @ 67Hz, 35.0kHz

3. 640 x 480 @ 75Hz, 37.5kHz

4. 640 x 480 @ 72Hz, 37.9kHz

5. 640 x 480 @ 85Hz, 43.27kHz

6. 720 x 400 @ 70Hz, 31.5kHz

7. 800 x 600 @ 56Hz, 35.1kHz

8. 800 x 600 @ 60Hz, 37.9kHz

9. 800 x 600 @ 75Hz, 46.9kHz

10. 800 x 600 @ 72Hz, 48.1kHz

11. 800 x 600 @ 85Hz, 53.7kHz

12. 832 x 624 @ 75Hz, 49.7kHz

13. 1024 x 768 @ 60Hz, 48.4kHz

14. 1024 x 768 @ 70Hz, 56.5kHz

15. 1024 x 768 @ 72Hz, 58.1kHz

16. 1024 x 768 @ 75Hz, 60.0kHz

17. 1024 x 768 @ 85Hz, 68.67kHz

18. 1280 x 1024 @ 60Hz, 63.4kHz

19. 1280 x 1024 @ 75Hz, 79.97kHz

20. 1440 x 900 @ 75Hz, 70.63kHz

1.4.2 Function Test Display Pattern

1. 640 x 480 @ 60Hz, 31.5kHz

2. 640 x 480 @ 67Hz, 35.0kHz

3. 640 x 480 @ 75Hz, 37.5kHz

4. 640 x 480 @ 72Hz, 37.9kHz

5. 640 x 480 @ 85Hz, 43.27kHz

6. 720 x 400 @ 70Hz, 31.5kHz

7. 800 x 600 @ 56Hz, 35.1kHz

8. 800 x 600 @ 60Hz, 37.9kHz

9. 800 x 600 @ 75Hz, 46.9kHz

10. 800 x 600 @ 72Hz, 48.1kHz

11. 800 x 600 @ 85Hz, 53.7kHz

12. 832 x 624 @ 75Hz, 49.7kHz

13. 1024 x 768 @ 60Hz, 48.4kHz

14. 1024 x 768 @ 70Hz, 56.5kHz

15. 1024 x 768 @ 72Hz, 58.1kHz

16. 1024 x 768 @ 75Hz, 60.0kHz

17. 1024 x 768 @ 85Hz, 68.67kHz

18. 1280 x 1024 @ 60Hz, 63.4kHz

19. 1280 x 1024 @ 75Hz, 79.97kHz

20. 1440 x 900 @ 75Hz, 70.63kHz

Item Test Content Pattern Specification Remark

1 Frequency &

Tracking

2 Contrast/Brightness 16 Gray Scale 16 gray levels should be

3 Boundary Horizontal &

4 RGB Color

Performance

Fine Line Moire Eliminate visual wavy

noise.

distinguishable.

Horizontal and Vertical position Vertical Thickness RGB Color Intensities

of video should be adjustable to

be within the screen frame.

Contrast of each R, G, B, color

should be normal.

Figure 1

Figure 2

Figure 3

Figure 4, 5, 6

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5 Screen Uniformity

& Flicker

6 Dead Pixel/Line White Screen &

7 White Balance White & Black

Full White Should be compliant with the

Dark Screen

Pattern

spec.

The numbers of dead pixels

should be compliant with the

spec.

The screen must have the pure

white and black pattern, no other

color.

Figure 7

Figure 7, 8

Figure 9

Fine Line Morie Pattern (Figure1) Gray Scale Pattern (Figure2)

Horizontal & Vertical Thickness Pattern

(Figure 3)

R. Color Pattern (Figure 4)

G. Color Pattern (Figure5) B. Color Pattern (Figure 6)

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Full White Patter (Figure 7) Dark Screen Pattern (Figure 8)

Black-White Pattern (Figure 9)

1.5 Function Test and Alignment Procedure

1.5.1 Memory Recall

You should do “Memory Recall” first. This action will allow you to erase all

end-user’s settings and restore the factory defaults.

1.5.2 Auto Image Adjust

Please select and enter “Auto Image Adjust” function on Main Menu to see if it is

workable.

The “Auto Image Adjust” function is aimed to offer a better screen quality by

built-in ASIC. For optimum screen quality, the user has to adjust each function manually.

1.5.3 Firmware

Test Pattern: Burn In Mode (Refer to Chapter 3-1. Hot Keys for Function Controls)

- Make sure the F/W is the latest version.

1.5.4 DDC

Test Pattern: EDID program

- Make sure it can pass test program.

1.5.5 Fine Tune and Sharpness

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Test Signal: 1440x900@60Hz Test Pattern: Line Moire Pattern

- Check and see if the image has noise and focus performs well. Eliminate visual line

bar.

- If not, readjust by the following steps: (a) Select and enter “Fine Tune” function on “Manual Image Adjust” to adjust the

image

to eliminate visual wavy noise.

(b) Then, select and enter “Sharpness” function to adjust the clarity and focus of the

screen image.

1.5.6 Boundary

Test Signal: 1440x900@60Hz Test Pattern: Horizontal & Vertical Line Thickness Pattern

- Check and see if the image boundary is within the screen frame.

- If not, readjust by the following steps: (a) Select and enter “Manual Image Adjust” function on OSD Main Menu. (b) Then, select and enter “Horizontal Size” or “Horizontal/Vertical Position”

function to adjust the video boundary to be full scanned and within screen frame.

1.5.7 White Balance

Test Signal: 1440x900@60Hz Test Pattern: White and Black Pattern

1.5.8 R, G, B, Colors Contrast

Test Signal: 1440x900@60Hz Test Pattern: R, G, B, Color Intensities Pattern and 16 Gray Scale Pattern

- Check and see if each color is normal and distinguishable.

- If not, please return the unit to repair area.

1.5.9 Screen Uniformity and Flicker

Test Signal: 1440x900@60Hz Test Pattern: Full White Pattern

- Check and see if it is in normal condition.

1.5.10 Dead Pixel and Line

Test Signal: 1440x900@60Hz Test Pattern: Dark and White Screen Pattern

- Check and see if there are dead pixels on LCD panel with shadow gauge and filter

film.

- The total numbers and distance of dead pixels should be compliant with the spec.

1.5.11 Mura

Test Pattern: White, RGB, Black, & Grey Test Tool: 8% ND Filter

- Check if the Mura can pass 8% ND Filter.

1.5.12 Audio

Test Signal: Voice signal (optional, depend on model) Test Pattern: liberty

- Make sure there is audio output.

- Make sure that audio function (volume≦80%) is working without noise and

resonance.

- Make sure that the sound of right and left speakers are in balance.

ViewSonic Corporation Confidential - Do Not Copy VX1935wm-1

1.5.13 Check for Secondary Display Modes

Test Signal: Analog / Digital:

640*350@70Hz 640*480@60HZ / 75HZ 720*400@70Hz 800*600@60HZ / 75HZ 832*624@75Hz 1024*768@60HZ / 75HZ 1280*1024@60 / 75Hz

- Normally when the primary mode 1440x900@60Hz is well adjusted and compliant with the specification, the secondary display modes will be great possible to be compliant with the spec. But we still have to check with the general test pattern to make sure every secondary is compliant with the specification.

1.5.14 Memory Recall

After final QC step, we have to erase all saved changes again and restore the

factory defaults. You should do “Memory Recall” again.

1.5.15 Power Off Monitor

Turn off the monitor by pressing “Power” button.

2. Firmware Upgrade Procedure

When you receive the returned monitor, please check whether the firmware version is the

latest.

If not, please do the following procedures to upgrade it to the latest version.

2.1 Equipment Needed

- VX1935WM Monitor

- Fixture for Firmware Upgrade

- VGA Cable

- PC (Personal Computer)

- ISP Tool

- Firmware Upgrade Program

- One additional monitor for checking the program execution

z ISP tool instruction

15 pin D-Sub LPT cable

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