ViewSonic VG710B - 17" LCD Monitor User manual

Model No. VLCDS23719-4W
17” Color TFT LCD Display
Service Manual
ViewSonic VG710b/s1
ViewSonic
381 Brea Canyon Road, Walnut, California 91789 USA - [phone]
(VG710s/b-1_SM_718 Rev. 1aFeb. 2004)
Model No. VLCDS23719-5W

Copyright
Copyright
¤
2003by ViewSonic Corporation. All rights reserved. No partof 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
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.
Optiquest is a registered trademark of ViewSonic Corporation.
Revision History
Revision Date Description Of Changes Approval
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1a 02/26/04 Initial Release DCN-3601 Angela Luh

TABLE OF CONTENTS
2. Specification
3. Front Panel Function Control Description
4. Circuit Description
6. Trouble Shooting Flow Chart
9. Block Diagram
10. Schematic Diagrams
7. Recommended Spare Parts List
1. Precautions and Safety Notices
5. Adjusting Procedure
8. Exploded Diagram And Spare Parts List
11. PCB Layout Diagrams
1
5
8
11
13
36
40
47
57
58
64
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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 adapter.
(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 dustand 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 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.
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.
1. Precautions and Safety Notices
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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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5.2 Handling and Placing Methods
Correct Methods: Incorrect Methods:
Only touch the metal frame of the LCD panel or the front
cover of the monitor. Do not touch the surface of the
polarizer.
Surface of the LCD panel is pressed by fingers and that
may cause “Mura.”
Take out the monitor with cushions
Taking out the monitor by grasping the LCD panel. That
may cause “Mura.”
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Place the monitor on a clean and soft foam pad.
Placingthe monitor on foreign objects. That could
scratch the surface of the panel or cause “Mura.”
The panel is placed facedown on the lap. That
may cause “Mura.”
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1. General Requirements
General Specifications
Test Resolution & Frequency “1280 x 1024” @ 60Hz
Test Image Size Full Size
Contrast and Brightness Controls Factory Default:
Contrast = 50%, Brightness = 100%
2. Signal Interface
Video Interface
Analog Input Connector DB-15 (Analog)
Digital Input Connector DVI-D (Digital)
Default Input Connector Defaults to the first detected input
Video Cable Connector DB-15 Pin out Compliant DDC 1/2B.
Video Signals 1. Video RGB (Analog) Separate Sync
2. TMDS (Digital)
Video Impedance 75 Ohms (Analog), 100 Ohms (Digital)
Exclusions Not compatible with interlaced video.
3. Power
Power Supply
External Power Supply Part Number: LSE 0107A1240
Input Voltage Range 90 to 264 VAC
Over Voltage Protection 12.7~18V FULL LOAD
Power Dissipation 36 WATTS(TYP)
4. Electrical Requirements
Horizontal / Vertical Frequency
Horizontal Frequency 30 – 82 kHz
Vertical Refresh Rate 50 – 85 HZ
Maximum Pixel Clock 135 MHz
Primary Preset “1280 x 1024” @ 60Hz
Look up table timing
<<Analog>>
1. 640 x 350 @ 70Hz, 31.5kHz
2. 640 x 480 @ 60Hz, 31.5kHz
3. 640 x 480 @ 67Hz, 35.0kHz
4. 640 x 480 @ 75Hz, 37.5kHz
5. 640 x 480 @ 72Hz, 37.9kHz
6. 640 x 480 @ 85Hz, 43.27kHz
7. 720 x 400 @ 70Hz, 31.5kHz
8. 800 x 600 @ 56Hz, 35.1kHz
9. 800 x 600 @ 60Hz, 37.9kHz
10. 800 x 600 @ 75Hz, 46.9kHz
11. 800 x 600 @ 72Hz, 48.1kHz
12. 800 x 600 @ 85Hz, 53.7kHz
13. 832 x 624 @ 75Hz, 49.7kHz
14. 1024 x 768 @ 60Hz, 48.4kHz
15. 1024 x 768 @ 70Hz, 56.5kHz
16. 1024 x 768 @ 72Hz, 58.1kHz
17. 1024 x 768 @ 75Hz, 60.0kHz
18. 1024 x 768 @ 85Hz, 68.67kHz
19. 1280 x 1024 @ 60Hz, 63.4kHz
20. 1280 x 1024 @ 75Hz, 79.97kHz
<<Digital>>
640 x 350 @ 70Hz, 31.5kHz
640 x 400 @ 60Hz, 31.5kHz
640 x 480 @ 60Hz, 31.5kHz
640 x 480 @ 75Hz, 37.5kHz
640 x 480 @ 72Hz, 37.9kHz
640 x 480 @ 85Hz, 43.27kHz
720 x 400 @ 70Hz, 31.5kHz
800 x 600 @ 56Hz, 35.1kHz
800 x 600 @ 60Hz, 37.9kHz
800 x 600 @ 75Hz, 46.9kHz
800 x 600 @ 72Hz, 48.1kHz
800 x 600 @ 85Hz, 53.7kHz
1024 x 768 @ 60Hz, 48.4kHz
1024 x 768 @ 70Hz, 56.5kHz
1024 x 768 @ 72Hz, 58.1kHz
1024 x 768 @ 75Hz, 60.0kHz
1024 x 768 @ 85Hz, 68.67kHz
1280 x 1024 @ 60Hz, 63.4kHz
2. Specification
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Changing Modes
Maximum Mode Change Blank Time for image
stability. Note:
1) Excluding “Auto Adjust” time
2) Under DOS mode (640 x 350, 720 x 400 & 640 x
400), there is no “Auto Adjust” feature.
3) The monitor needs to do “Auto Adjust” the first
time a new mode is detected.
Under 5 seconds (Maximum)
1 seconds (Typ.) for recognized timings
1-2 seconds (Typ.) for unrecognized timing
.
5. Audio
Speaker Specification
Line input connection 3.5 mm stereo jack
Line input signal 1.0 Vrms
Line input impedance 10 kOhm
Maximum power output (Electric) 3 W @ < 5 % DISTORTION
Signal to Noise Ratio 72 dB
Frequency response 400 Hz – 20 kHz
Distortion < 5 % THD (@1kHz),
6. LCD Panel
Panel Characteristics
Panel Type “LG LM170E01-A5”
Type “TFT ACTIVE MATRIX
Active Size 337.9 (H) x 270.3 (V)
Pixel Arrangement RGB Vertical Stripe
Pixel Pitch 0.264 mm
Glass Treatment Anti Glare (Hard coating 3H)
# of Backlights 4 CCFL edge-light (2 top / 2 bottom)
Backlight Life 50,000 Hours (minimum)
Panel Performance
Luminance –
Condition:
CT = 6500K, Contrast = Max,
Brightness = Max
250 cd/m2(typ. after 30-minute warm-up)
200 cd/m2(minimum after 30-minute warm-up)
Brightness Uniformity ∆L5=Max 1.3 ∆L5= Maximum Luminance/
Minimum Luminance
Contrast Ratio 450:1 (typ.), 300:1 (minimum)
Color Depth 16 Million colors (8 bit panel)
Viewing Angle (Horizontal) 140 degrees @ CR>10, 160 degrees @ CR>5
Viewing Angle (Vertical) 120 degrees @ CR>10, 140 degrees @ CR>5
Response Time
10%-90% @ Ta=25°C
16 ms (Tr= 2 ms, Tf = 14 ms) (typ.)
30 ms (Tr= 6 ms, Tf = 24 ms) (maximum)
Note: The 2nd source of LCD panel is “AU M170EN05.”
7. Mechanical
Dimensions
Width 378 mm
Height 405 mm
Depth 177 mm
Depth (Head Only) 50 mm
Monitor Weight 5.3 kg / 11.66 lbs
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Ergonomics
Tilt Up 20 DEGREES MINIMUM
Tilt Down -5 degrees
8. Environmental
Environmental Conditions
Operating Temperature 0°C to +40°C
Storage Temperature -20°C to +60°C
Operating Relative Humidity 20% to 80% RH Non-Condensing
Storage Relative Humidity 5% to 90% RH Non-Condensing
Operating Altitude 0 to +3,000 meters
Storage Altitude 0 to +12,000 meters
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1. Control Location
Use the buttons on the front control panel to display and adjust the On View controls which display on the screen.
Audio Mute button
turns the sound off.
Decreases or increases
volume
Displays the Main Menu
or exits the control screen
and saves adjustments
Power
On/Off
Power light
Green = ON
Orange = Power Saving
Also a shortcut to toggle
between analog and digital
connections.
Also toggles between two
controls on some screens.
Displays the control screen for
the highlighted control.
Scrolls through menu options and
adjusts the displayed control.
Also a shortcut to display the
Contrast/Brightness adjustment control
screen.
2. OSD Menu Controls
Select the menu items shown below by using the up [▲] and down [▼] buttons.
3. Front Panel Function Control Description
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Main Menu:
Auto Image Adjust -- adjusts sizes and centers the screen image automatically.
Contrast -- adjusts the difference between the image background (black level) and the foreground (white level).
Brightness -- adjusts background black level of the screen image.
Input Select -- toggles between inputs if you have more than one computer.
Color Adjust -- provides several color adjustment modes: preset color temperatures and RGB, which allow you to adjust
red (R), green (G), and blue (B) separately. The factory setting for this product is 6500K (6500 Kelvin).
Memory Recall -- returns the adjustments back to factory settings if the display is operating in a factory Preset Timing
Mode listed in the Specifications of this manual.
Manual Image Adjust:
H. Size (Horizontal Size) -- adjusts the width of the screen image.
H./V. Position (Horizontal/Vertical Position) -- moves the screen image left or right and up or down.
Fine Tune -- sharpens the focus by aligning the text and/or graphic characters.
NOTE: Try Auto Image Adjust first.
Sharpness -- adjusts the clarity and focus of the screen image.
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Setup Menu:
Language -- allows you to choose the language used in the menus and control screens.
Resolution Notice -- allows you to enable or disable the resolution notice.
OSD Position -- allows you to move the on-screen display menus and control screens.
OSD Timeout -- sets the length of time the on-screen display screen is displayed. For example, with a “30 second ”
setting, if a control is not pushed within 30 seconds, the display screen disappears.
OSD Background On/Off -- allows you to turn the On-Screen Display background On or Off.
3. Hot Keys for Function Controls
Buttons: Functions:
[Up] + [Down] arrows recall Contrast or Brightness while in the Contrast
or Brightness adjustment, or recall both of Contrast
and Brightness when the OSD is not on.
[Volume-] + [Volume+] recall volume to 50% while in volume adjustment,
or when OSD is not on.
[1] + [2] toggle 720x400 and 640x400 mode when input
720x400 or 640x400 mode.
[1] + [Up] + [Down] White Balance. White Balance should set the screen
on the pure black and white pattern with
640*480@60Hz resolution.
[1] + [Down] (hold for 10 seconds) Power Lock (Unlock). User won’t be able to turn off
the monitor.
[1] + [Up] (hold for 10 seconds) OSD Lock (Unlock). It will lock all functions,
including “Volume” and “Mute”.
[Up] + [Down] + [Power On] with signal
(hold for 3 seconds)
All Mode Reset. It will erase all end users’ settings
and restore the factory defaults.
[Up] + [Down] + [Power On]
without signal
(hold for 3 seconds)
Burn in Mode. After entering Burn in Mode, press
[1] button, you can find the information about this
monitor.
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1. Power supply (DC/DC Converter)
TheAP1501 is monolithic IC designed for M/B DC/DC converter,with the ability ofdriving a 3A load without any
additional transistor component.
TheAP1501 operates at a switching frequency of150 kHzand thusallows smaller-sized filter components than
would be needed with lower frequency switch regulator.
2. Flash Memory
The Pm39LV010R is a 1 Megabit, 3.3 Volt-only Flash Memory organized as 131,072 bytes of 8 bits each. This device is
designed to use a 3.0 Volt to 3.6 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
4. Circuit Description
erase or block erase operation, it can be reprogrammed on a byte-by-byte basis.
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3. GM5120
The gm5110/20 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 TM receiver, a high quality 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
gm5110/20 devices simplify and reduce the cost of LCD monitors while maintaining a high-degree of flexibility and
quality.
gm5110/5120 System Design Example
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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1. Function Test
1.1 Product

- 17” LCD Monitor
1.2 Test Equipment
- Color Video Signal & Pattern (or PC with SXGA resolution and a sound card)
1.3 Test Condition
Before function test and alignment, each LCD Monitor should be 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)
1.4 Test Display Modes & Pattern
1.4.1 Compatible Modes
Analog Digital
1. 640 x 350 @ 70Hz, 31.5kHz
2. 640 x 480 @ 60Hz, 31.5kHz
3. 640 x 480 @ 67Hz, 35.0kHz
4. 640 x 480 @ 75Hz, 37.5kHz
5. 640 x 480 @ 72Hz, 37.9kHz
6. 640 x 480 @ 85Hz, 43.27kHz
7. 720 x 400 @ 70Hz, 31.5kHz
8. 800 x 600 @ 56Hz, 35.1kHz
9. 800 x 600 @ 60Hz, 37.9kHz
10. 800 x 600 @ 75Hz, 46.9kHz
11. 800 x 600 @ 72Hz, 48.1kHz
12. 800 x 600 @ 85Hz, 53.7kHz
13. 832 x 624 @ 75Hz, 49.7kHz
14. 1024 x 768 @ 60Hz, 48.4kHz
15. 1024 x 768 @ 70Hz, 56.5kHz
16. 1024 x 768 @ 72Hz, 58.1kHz
17. 1024 x 768 @ 75Hz, 60.0kHz
18. 1024 x 768 @ 85Hz, 68.67kHz
19. 1280 x 1024 @ 60Hz, 63.4kHz
20. 1280 x 1024 @ 75Hz, 79.97kHz
640 x 350 @ 70Hz, 31.5kHz
640 x 400 @ 60Hz, 31.5kHz
640 x 480 @ 60Hz, 31.5kHz
640 x 480 @ 75Hz, 37.5kHz
640 x 480 @ 72Hz, 37.9kHz
640 x 480 @ 85Hz, 43.27kHz
720 x 400 @ 70Hz, 31.5kHz
800 x 600 @ 56Hz, 35.1kHz
800 x 600 @ 60Hz, 37.9kHz
800 x 600 @ 75Hz, 46.9kHz
800 x 600 @ 72Hz, 48.1kHz
800 x 600 @ 85Hz, 53.7kHz
1024 x 768 @ 60Hz, 48.4kHz
1024 x 768 @ 70Hz, 56.5kHz
1024 x 768 @ 72Hz, 58.1kHz
1024 x 768 @ 75Hz, 60.0kHz
1024 x 768 @ 85Hz, 68.67kHz
1280 x 1024 @ 60Hz, 63.4kHz
5. Adjusting Procedure
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Item Test Content Pattern Specification Remark
1 Frequency & Tracking Fine Line Moire Eliminate visual wavy noise. Figure 1
2 Contrast/Brightness 16 Gray Scale 16 gray levels should be
distinguishable.
Figure 2
3 Boundary Horizontal & Vertical
Thickness
Horizontal and Vertical position of
video should be adjustable to be
within the screen frame.
Figure 3
4 RGB Color Performance RGB Color Intensities Contrast of each R, G, B, color
should be normal.
Figure 4, 5, 6
5 Screen Uniformity & Flicker Full White Should be compliant with the spec. Figure 7
6 Dead Pixel/Line White Screen & Dark Screen The numbers of dead pixels should
be compliant with the spec.
Figure 7, 8
7 White Balance White & Black Pattern The screen must have the pure white
and black pattern, no other color.
Figure 9
Fine Line Morie Pattern (Figure1) Gray Scale Pattern (Figure2)
Horizontal & Vertical Thickness Pattern (Figure 3) R. Color Pattern (Figure 4)
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1.4.2 Function Test Display Pattern

G. Color Pattern (Figure5) B. Color Pattern (Figure 6)
Full White Pattern (Figure 7) Dark Screen Pattern (Figure 8)
Black-White Pattern (Figure 9)
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1.5 Function Test and Alignment Procedure
1.5.1 All Modes Reset
You should do “All Mode Reset” (Refer to Chapter III-3. Hot Keys for Function Controls) 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 III-3. 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
Test Signal: 1280*1024@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: 1280*1024@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: 640*480@60Hz
Test Pattern: White and Black Pattern
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1.5.8 R, G, B, Colors Contrast
Test Signal: 1280*1024@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: 1280*1024@60Hz
Test Pattern: Full White Pattern
- Check and see if it is in normal condition.
1.5.10 Dead Pixel and Line
Test Signal: 1280*1024@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: 10% ND Filter
- Check if the Mura can pass 10% 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.
1.5.13 Check for Secondary Display Modes
Test Signal:
Analog: 640*350@70Hz; 640*480@60/67/72/75/85Hz;
720*400@70Hz; 800*600@56/60/72/75/85Hz;
832*624@75Hz, 1024*768@60/70/72/75/85Hz;
1280*1024@60/75Hz
Digital: 640*350@70Hz; 640*480@60/72/75/85Hz;
720*400@70Hz; 800*600@56/60/72/75/85Hz;
1024*768@60/70/72/75/85Hz; 1152*870@75Hz,
1280*720@60Hz, 1280*1024@60Hz
- Normally when the primary mode 1280*1024@60Hz is well adjusted and compliant with the specification, the
secondary display modes will also becompliantwith thespec. Butwe still have to check with the general test pattern
tomake sure every secondary is compliantwith the specification.
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