ViewSonic VX2025wm-1 User manual

ViewSonic VX2025wm-1
Model No. VS10859
20” Color TFT LCD Display
(VX2025wm-1_SM Rev. 1b Sep. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA –[phone]
Service Manual

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
i
Copyright
Copyright © 2005 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 02/16/2006 Initial Release Jamie Chang
1b09/11/2006 VS-E060132 Add 2nd panel source Jamie Chang

ViewSonic Corporation Confidential -Do Not Copy VX2025wm
ii
TABLE OF CONTENTS
1. Precautions and Safety Notices 1
2. Specification 4
3. Front Panel Function Control Description 9
4. Circuit Description 12
5. Adjustment Procedure 24
6. Troubleshooting Flow Chart 38
7. Recommended Spare Parts List 41
8. Exploded Diagram and Exploded Parts List 44
9. Block Diagram 48
10. Schematic Diagrams 49
11. PCB Layout Diagrams 56

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
1
1. Precautions and Safety Notices
1. 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 guide line
2. Safety Check :
Care should be taken while servicing this LCD display. Because of the high voltage used in the
inverter circuit. These voltage are exposed in such areas as the associated transformer circuits .
3. POWER SUPPLY REQUIREMENTS
The external power converter for this display utilizes AC and DC cords , AC cord is
detachable , but DC cord is permanently attached . Any attempt to replace another adapter could
result in serious problem on the display .
4. LEAKAGE CURRENT HOT CHECK
4-1 Plug the AC cord directly into theAC outlet. Do not use an isolation transformer during
this check.
4-2 Connect a 1500 ohm , 10 watt resistor , paralleled by a 0.15uF capacitor between each
metallic part and a good earth ground
4-3 Use an AC voltmeter with 1000 ohm / volt or more sensitivity and measure the AC voltage
across the combination 1500 ohm resistor and 0.15uF capacitor.
4-4 Move the resistor connection to each exposed metallic part and measure the voltage.
4-5 Reverse the polarity of the AC plug in theAC outlet and repeat the above measurement.
4-6 Voltage measured must not exceed 1.5 volt RMS, from any exposed metallic part to the
ground. A leakage current tester may be used in the above hot check, in which case any
circuit measured must not exceed 1.0 milliamp. In the case of a measurement exceeding
the 1.0 milliamp value, a rework is required to eliminate the chance of a shock hazard .
To Metal Parts
V
AC VOLTMETER
1500 10W
0.15u
.
Earth Ground

Handing Methods incorrect method
Take out the monitor by grasping the LCD
panel.That may cause “ MURA“.
Place the monitor on foreign objects .That
could scratch the surface of panel
Surface of the panel is pressed by fingers &
this may cause “ MURA “
Do not touch the surface of the polarizer .
Take out the monitor with cushion
correct method
Place the monitor on a clean & soft foam pad
ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
2

when assemble&disassembly
bezel
when assemble&disassembly
bezel
when assemble&disassembly
bracket
when assemble&disassembly
bracket
when you get the lcd
monitor
when you get the lcd
monitor
ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
3

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
4
2. Specification
GENERAL specification
Test Resolution & Frequency 1680x1050 @ 60Hz
Test Image Size Full Size
Contrast and Brightness Controls Factory Default:
Contrast = 70%, Brightness = 100%
VIDEO INTERFACE
Analog Input Connector DB-15 (Analog), refer the appendix A
Digital Input Connector DVI-D (Digital), refer the appendix B
Default Input Connector Defaults to the first detected input
Video Cable Strain Relief Equal to twice the weight of the monitor for five minutes
Video Cable Connector DB-15 Pin out Compliant DDC 1/2B
Video Signals 1. Video RGB (Analog)
Separate, Composite, and Sync on Green
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 LVDS
DDC 1/2B Compliant with Revision 1.3
Sync Compatibility Separate Sync, Composite Sync, SOG
Video Compatibility Shall be compatible with all PC type computers, Macintosh
computers, and after market video cards
Resolution Compatibility
640 x 350*, 640 x 480, 720 x 400* (640 x 400*), 800 x 600, 832 x
624, 1024 x 768, 1152 x 864, 1152 x 870, 1280 x 720, 1280 x
960, 1280 x 1024, 1680 x 1050
* The image vertical size might not be full screen.
But the image vertical position should be at the center.
Exclusions Not compatible with interlaced video

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
5
POWER SUPPLY
Internal Power Supply Part Number: EAPD-64CF
Input Voltage Range 90 TO 264 VAC
Input Frequency Range 47.5 TO 63 HERTZ
Short Circuit Protection Output can be shorted without damage
Over Current Protection 10 A typical
Leakage Current 3.5mA (Max) at 264VAC / 50Hz
EFFICIENCY 80 % typical at 115VAC Full Load
Fuse Internal and not user replaceable
Power Dissipation 64 Watts (typ)
Max Input AC Current 1.5Arms @ 90VAC
INRUSH CURRENT (COLD START) 80 A @ 230VAC
Power Supply Cold Start Shall start and function properly when under full load, with all combinations of input voltage, input frequency, and operating
temperature
Power Supply Transient Immunity Shall be able to withstand an ANSI/IEEE C62.41-1980 2000V
200 ampere ring wave transient test with no damage
Power Supply Line Surge Immunity Shall be able to withstand 1.5 times nominal line voltage for one
cycle with no damage
Power Supply Missing Cycle Immunity Shall be able to function properly, without reset or visible screen artifacts, when ½ 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 define 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-prong NEMA 5-15P type plug. Length = 1.8m.
Connects to display.
Color = Black
European Type Power Cable Schuko CEE7-7 type plug. Length = 1.8m, Connects to display.
Color = Black
CCC Type Power Cable Separate 3-prong type plug.
Length = 1.8m. Connects to display.
Color = Black
PSE Type Power Cable Separate 2-prong NEMA 1-15P type plug. Length = 1.8m. Connects to display.
Color = Black
Power Saving Operation(Method) VESA DPMS Signaling
ON Mode < 50W (Max) / 49W (Typ)
Power Consumption On Mode < 50 W (Max) / 49W (Typ)
Saving Mode < 2 W, Off Mode < 1 W
Recovery Time On Mode = N/A, Active Off < 3 sec

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
6
ELECTRICAL REQUIREMENT
Horizontal / Vertical Frequency
Horizontal Frequency 30 – 82 KHZ
Vertical Refresh Rate 50 – 75 HZ
Maximum Pixel Clock Digital: 165 MHz Analog: 205 MHz
Sync Polarity Independent of sync polarity.
Timing Table
Item Timing Analog Digital
1 640 x 350 @ 70Hz, 31.5kHz Yes Yes
2 640 x 400 @ 60Hz, 31.5kHz Yes Yes
3 640 x 400 @ 70Hz, 31.5kHz Yes Yes
4 640 x 480 @ 50Hz, 24.7kHz No No
5 640 x 480 @ 60Hz, 31.5kHz Yes Yes
6 640 x 480 @ 67Hz, 35.0kHz Yes Yes
7 640 x 480 @ 72Hz, 37.9kHz Yes Yes
8 640 x 480 @ 75Hz, 37.5kHz Yes Yes
9 640 x 480 @ 85Hz, 43.27kHz No No
10 720 x 400 @ 70Hz, 31.5kHz Yes Yes
11 800 x 600 @ 56Hz, 35.1kHz Yes Yes
12 800 x 600 @ 60Hz, 37.9kHz Yes Yes
13 800 x 600 @ 75Hz, 46.9kHz Yes Yes
14 800 x 600 @ 72Hz, 48.1kHz Yes Yes
15 800 x 600 @ 85Hz, 53.7kHz No No
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 No No
22 1152 x 864 @ 75Hz, 67.5kHz Yes Yes
23 1152 x 870 @ 75Hz, 68.7kHz Yes Yes
24 1280 x 1024 @ 60Hz, 63.4kHz Yes Yes
25 1280 x 1024 @ 75Hz, 79.97kHz Yes Yes
26 1280x 720 @ 60Hz, 45kHz Yes Yes
27 1680 x 1050 @ 60Hz, 65.3kHz Yes Yes
28 1680 x 1050 @ 75Hz, 82.3kHz Yes No
29 1680 x 1050 @ 85Hz, 93.9kHz No No
Primary Presets
1680x1050 @ 60Hz
AUDIO INTERFACE (SPEAKER SPECIFICATION)
Line input connection 3.5 mm stereo jack
Line input signal 1.3 Vrms
Line input impedance 10 kOhm
Maximum power output (Electric) 1 W @ < 5% distortion
Signal to Noise Ratio 72 dB
Frequency response 200 Hz – 20 Khz
Distortion < 5 % THD (@1kHz)
Vibration There should be no audible vibration with volume at 100% and
treble / bass at default
Screen image There should be no affect on the screen image stability under
any conditions
Connector PC99 requirement Audio in Lime Green pantone # 577C
Cable type / length 3.5mm stereo cable / 1.8m length
Audio DPMS Speakers stay on when the rest of the monitor is in power saving Note: There is no guarantee <1 W power consumption in Active
Off mode, when the Audio Cable is connected

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
7
Panel Characteristics:
1st Source Panel
Model number AUO M201EW01 V0
Type PMVA type with LVDS interface
Active Size 433.44 (H) x 270.9(V)
Pixel Arrangement RGB Vertical Stripe
Pixel Pitch 0.258 mm
GLASS TREATMENT Anti Glare (Hard coating 3H)
# OF BACKLIGHTS 6 CCFL
BACKLIGHT LIFE 50,000 Hours (Min)
Luminance (5-point) –
Condition:
CT = 6500K, Contrast = Max, Brightness = Max
300 cd/m2 (Typ after 30 minute warm up)
240 cd/m2 (Min after 30 minute warm up)
Brightness Uniformity ≧80% (Typ), 75% (Min),
Contrast Ratio 800:1 (typ), 400:1 (min)
Color Depth 16.7 million colors (8 bits)
Viewing Angle (Horizontal) @ CR>10
Typical: 176º
Minimum: 150º
@ CR>5
Typical: T.B.D
Minimum: T.B.D
Viewing Angle (Vertical) @ CR>10
Typical: 176º
Minimum: 150º
@ CR>5
Typical: T.B.D
Minimum: T.B.D
Response Time
10%-90% @ Ta=25°C
Tr = 25 ms,Tf = 15 ms Total = 40ms (max)
Tr =11 ms,Tf = 5ms Total =16ms(typ)
Without OD Board (gray –gray)
(Average of Tr and Tf) = 8 ms (typ)
Panel Defects Please see Panel Quality Specifications.

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
8
2nd Source Panel
Model number AUO M201EW01 V3
Type AMVA type with LVDS interface
Active Size 433.44 (H) x 270.9(V)
Pixel Arrangement RGB Vertical Stripe
Pixel Pitch 0.258 mm
GLASS TREATMENT Anti Glare (Hard coating 3H)
# OF BACKLIGHTS 6 CCFL
BACKLIGHT LIFE 40,000 Hours (Min)
Luminance (5-point) –
Condition:
CT = 6500K, Contrast = Max, Brightness = Max
300 cd/m2 (Typ after 30 minute warm up)
240 cd/m2 (Min after 30 minute warm up)
Brightness Uniformity ≧80% (Typ), 75% (Min),
Contrast Ratio 1000:1 (typ), 750:1 (min)
Color Depth 16.7 million colors (8 bits)
Viewing Angle (Horizontal) @ CR>10
Typical: 178º
Minimum: 150º
@ CR>5
Typical: T.B.D
Minimum: T.B.D
Viewing Angle (Vertical) @ CR>10
Typical: 178º
Minimum: 150º
@ CR>5
Typical: T.B.D
Minimum: T.B.D
Response Time
10%-90% @ Ta=25°C
Tr = 25 ms,Tf = 15 ms Total = 40ms (max)
Tr =11 ms,Tf = 5ms Total =16ms(typ)
Without OD Board (gray –gray)
(Average of Tr and Tf) = 8 ms (typ)
Panel Defects Please see Panel Quality Specifications.
MECHANICAL
Dimension (Desktop)
Width 484.6 mm (19 inch)
Height 441.3 mm (17.3inch)
Depth 201 mm (7.9 inch)
Monitor Weight 6.3 Kg (13.89 lbs)
Dimension (Head Only / Wall Mount)
Width 484.6 mm (19 inch)
Height 340.1 mm (13.4 inch)
Depth 67.1 mm (2.6 inch)
Monitor Weight 5Kg (11.02 lbs)
Ergonomics
Tilt Up From 0º up to 20º≧
Tilt Down From 0º down to -3º ~ -5 º

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
9
3. Front Panel Function Control Description

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
10
Main Menu Controls
Adjust the menu items shown below by using the up and down buttons.
A. Auto Image Adjust automatically sizes, centers, and fine tunes the video signal to eliminate
waviness and distortion. Press the [2] button to obtain a sharper image.
NOTE: Auto Image Adjust works with most common video cards. If this function does not work on
your LCD display, then
lower the video refresh rate to 60 Hz and set the resolution to its pre-set value.
B. Contrast adjusts the difference between the image background (black level) and the foreground
(white level).
C. Brightness adjusts the lamps current to control the screen brightness.
D. Input adjusts the Analogue or the Digital input source
E. Audio Adjust the volume increase or decrease and mute function
F. Color Adjust provides several color options: preset color temperatures and Custom User Color which
allows you to adjust red (R), green (G), and blue (B). 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).
5400K —Adds red to the screen image for warmer white and richer red.
Custom User Color —Individual adjustments for red, green, and blue.
1 To select color (R, G or B) press button [2].
2 To adjust selected color, press ▲ or ▼.
3 When you are finished making all color adjustments, press button [1] twice.
G. Information displays the timing mode (video signal input) coming from the graphics card in your
computer. See your graphic card’s user guide for instructions on changing the resolution and refresh
rate (vertical frequency). VESA 1680 x 1050 @ 60 Hz (recommended) means that the resolution is
1680 x 1050 and the refresh rate is 60 Hertz.
H. Manual Image Adjust controls are explained below:
H. Size (Horizontal Size) adjusts the width of the screen image.
NOTE: Vertical size is automatic with your LCD display.
H./V. Position adjusts horizontal and vertical position of the screen image. You can toggle between
Horizontal and Vertical by pressing button [2]. Horizontal moves the screen image to the left or to the right.
Vertical moves the screen image up and down.
Fine Tune sharpens focus by aligning the illuminated text and/or graphic characters.
Sharpness adjusts the clarity and focus of the screen image.
Setup Menu controls are explained below:
Language allows you to choose the language used in the menus and control screens.
Resolution Notice displays the recommended resolution for this LCD display.
Enable allows the Resolution Notice to appear on-screen.

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
11
Disable will not allow the Resolution Notice to appear on-screen.
OSD Timeout sets the length of time an on-screen display screen is displayed. For example,
with a“15 second” setting, if a control is not pushed within 15 seconds, the display OSD disappears.
I. OSD Position allows you to move the on-screen display menus and control screens.
J. Memory Recall returns adjustments to the original factory settings if the display is operating in a
factory Preset Timing Mode listed in this user guide.

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
12
4. Circuit Description
1. Outline
1.1 Power On/Off, (2) Enter button, up arrow button, down arrow button, (1) MENU button, n on the front
panel.
1.2 D-sub 15pin connector, DVI-D connector, audio line-in receptacle, and AC-IN are located on the back
side of the cabinet.
1.3 OSD menu includes the following function;
Auto Image Adjust (only active under analog input)
Contrast/Brightness
Input Select
Audio Adjust
Color Adjust
Information
Manual Image Adjust
Setup Menu
Memory Recall
1.4 Contrast and Brightness can be directly controlled with UP / DOWN key.
1.5 Audio volume can be controlled with UP/DN key when Audio Adjust menu is active.
2. CONNECTORS
2.1 AC inlet : CEE22 typed connector
2.2 Audio : Line-in,
CN9
2
3
4
5
1
Line-in receptacle
(Line-in receptacle is green)

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
13
2.3 Video signal connector for analog input: 15P Mini D-Sub
PIN MNEMONI SIGNAL
1RV Red Video
2GV Green Video
3BV Blue Video
4NC None
5GND Ground (DDC return)
6RG Red GND
7GG Green GND
8BG Blue GND
9+5V +5V (for DDC)
10 SG Sync GND
11 NC None
12 SDA DDC Data
13 HS Horizontal Sync
14 VS Vertical Sync
15 SCL DDC Clock
2.4 Video signal connector for digital input: 24pin DVI-D connector
Pin No.
Signal Name
Description
1RX2-TMDS negative differential input, channel 2
2RX2+ TMDS positive differential input, channel 2
3GND Logic Ground
4RX4-Reserved. No connection
5RX4+ Reserved. No connection
6SCL DDC2B Clock
7SDA DDC2B Data
8VS Reserved. No connection
9RX1-TMDS negative differential input, channel 1
10 RX1+ TMDS positive differential input, channel 1
11 GND Logic Ground
12 RX3-Reserved. No connection
13 RX3+ Reserved. No connection
14 +5V Power
15 GND Logic Ground
16 HP SENSE Pin, Pull High
17 RX0-TMDS negative differential input, channel 0
18 RX0+ TMDS positive differential input, channel 0
19 GND Logic Ground
20 RX5-Reserved. No connection
21 RX5+ Reserved. No connection
22 GND Logic Ground
23 RXC+ TMDS positive differential input, reference clock
24 RXC-TMDS negative differential input, reference clock
CN6
DB15HD
1 6 2 7 3 8 4 9 5
11 12 13 14 15 10
16 17
CN9
DVI-D
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
RX2-
RX2+
GND
RX4-
RX4+
SCL
SDA
VS
RX1-
RX1+
GND
RX3-
RX3+
5V
GND
HP
RX0-
RX0+
GND
RX5-
RX5+
GND
RXC+
RXC-

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
14
3. ELECTRICAL SPECIFICATIONS
3.1 Standard conditions
Display Area 433.44 x 270.9 mm
Video Signal 0.7Vpp
Contrast Default
Brightness Default
Ambient 20 +/-5 °C
Input AC
Warming up > 30 min
Display 1680 x 1050
3.2 POWER
3.2.1 Power supply
Input voltage 100~240Vac
Power frequency 50~60Hz
<1.5Arms@90Vac Input current
Inrush current 80A(Max) at 230Vac(cold
start)
Power consumption 47W(typical);50Watts(Max)
3.2.2 Power Management
State Power Indicator
On 47Watts Green
Standby < 2Watts Amber
Off <2Watts Off

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
15
3.3 Acceptable timing
If the timing is within following specification, this LCD display can automatically function with a certain
position.
Horizontal: Sync frequency: 30~82 KHz (Analog: 205MHz, Digital:165MHz)
Vertical: Sync frequency: 50~75*Hz
3.4 Signal level and input impedance
3.4.1 Video Signal level: 0.7Vp-p Video signal.
3.4.2 Sync Signal level
H/V Separate: TTL level
3.4.3 Input impedance
Analog video input: 75 ohm
Digital video input: 100 ohm
Sync input: > 1 k ohm
Audio input: 10K ohm
4. SIGNAL CABLE: Signal cable with Mini D-Sub 15P connectors at both ends. Length: 1.8 meter.
5. EDID data
5.1. Analog EDID: Analog EDID is stored in IC4
______________________________________________________________________
EDID Block 0, Bytes 0-127
128 BYTES OF EDID CODE:
0 1 2 3 4 5 6 7 8 9
________________________________________
0 | 00 FF FF FF FF FF FF 00 5A 63
10 | 1D E5 01 01 01 01 01 0F 01 03
20 | 0E 2B 1B 78 2E CF E5 A3 5A 49
30 | A0 24 13 50 54 BF EF 80 B3 0F
40 | 81 80 81 40 71 4F 01 01 01 01
50 | 01 01 01 01 21 39 90 30 62 1A
60 | 27 40 68 B0 36 00 B1 0F 11 00
70 | 00 1C 00 00 00 FF 00 51 36 59
80 | 30 35 30 31 30 30 30 30 31 0A
90 | 00 00 00 FD 00 32 4B 1E 52 15
100 | 00 0A 20 20 20 20 20 20 00 00
110 | 00 FC 00 56 58 32 30 32 35 77
120 | 0A 20 20 20 20 20 00 11
______________________________________________________________________
(08-09) ID Manufacturer Name ________________ = VSC
(11-10) Product ID Code _____________________ = E51D
(12-15) Last 5 Digits of Serial Number ______ = Not Used

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
16
(16) Week of Manufacture _________________ = 01
(17) Year of Manufacture _________________ = 2005
(10-17) Complete Serial Number ______________ = See Descriptor Block
(18) EDID Version Number _________________ = 1
(19) EDID Revision Number ________________ = 3
(20) VIDEO INPUT DEFINITION:
Analog Signal
0.700, 0.300 (1.000 Vp-p)
Separate Syncs, Composite Sync, Sync on Green
(21) Maximum Horizontal Image Size ________________ = 430 mm
(22) Maximum Vertical Image Size __________________ = 270 mm
(23) Display Gamma ________________________________ = 2.20
(24) Power Management and Supported Feature(s):
Active Off/Very Low Power, Standard Default Color Space,
Preferred Timing Mode
Display Type = R/G/B Color
(25-34) CHROMA INFO:
Red X -0.640 Green X -0.288 Blue X -0.144 White X -0.313
Red Y -0.352 Green Y -0.628 Blue Y -0.076 White Y -0.329
(35) ESTABLISHED TIMING I:
720 X 400 @ 70Hz (IBM,VGA)
640 X 480 @ 60Hz (IBM,VGA)
640 X 480 @ 67Hz (Apple,Mac II)
640 X 480 @ 72Hz (VESA)
640 X 480 @ 75Hz (VESA)
800 X 600 @ 56Hz (VESA)
800 X 600 @ 60Hz (VESA)
(36) ESTABLISHED TIMING II:
800 X 600 @ 72Hz (VESA)
800 X 600 @ 75Hz (VESA)
832 X 624 @ 75Hz (Apple,Mac II)
1024 X 768 @ 60Hz (VESA)
1024 X 768 @ 70Hz (VESA)
1024 X 768 @ 75Hz (VESA)
1280 X 1024 @ 75Hz (VESA)
(37) Manufacturer's Reserved Timing:
1152 X 870 @ 75Hz (Apple,Mac II)
(38-53) Standard Timing Identification:
1680 X 1050 @75Hz
1280 X 1024 @60Hz

ViewSonic Corporation Confidential -Do Not Copy VX2025wm-1
17
1280 X 960 @60Hz
1152 X 864 @75Hz
Not Used
Not Used
Not Used
Not Used
______________________________________________________________________
(54-71) Detailed Timing / Descriptor Block 1:
1680x1050 Pixel Clock: 146.25 MHz
______________________________________________________________________
Horizontal Image Size: 433 mm Vertical Image Size: 271 mm
Refreshed Mode: Non-Interlaced Normal Display -No Stereo
Horizontal:
Active Time: 1680 pixels Blanking Time: 560 pixels
Sync Offset: 104 pixels Sync Pulse Width: 176 pixels
Border: 0 pixels Frequency: 65.29 KHz
Vertical:
Active Time: 1050 lines Blanking Time: 39 lines
Sync Offset: 3 lines Sync Pulse Width: 6 lines
Border: 0 lines Frequency: 59.95 Hz
Digital Separate, Horizontal Polarity (-) Vertical Polarity (+)
______________________________________________________________________
(72-89) Detailed Timing / Descriptor Block 2:
Monitor Serial Number:
Q6Y050100001
______________________________________________________________________
(90-107) Detailed Timing / Descriptor Block 3:
Monitor Range Limits:
Min Vertical Freq -50 Hz
Max Vertical Freq -75 Hz
Min Horiz. Freq -30 KHz
Max Horiz. Freq -82 KHz
Pixel Clock -210 MHz
Secondary GTF -Not Supported
______________________________________________________________________