ViewSonic VA521,VLCDS27996-1W,VE510b-2,VE510s-2,VLCDS27996-2W,VLCDS279963W Service manual
Service Manual
ViewSonic VA521
VE510b/s-21
Model No. VLCDS27996-1W/2W/3W
15” Color TFT LCD Display
ViewSonic
(VA521/VE510b/s-2_SM_819 Rev. 1e Apr. 2005)
381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
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.
1a
1b
1c
1e
Revision History
ECR Number
02/11/04
04/05/04
10/25/04
04/08/05
4701
5151
Initial Release
Add VE510b/s-2
Change Scaler from MST P/N: 2365929596
To RealTek 2013 P/N: 2365930996
Add Hannstar HSD150MX15-B (25ms)
as the second panel source
Description of Changes EditorRevision SM Editing Date
A. Lu
A. Lu
A. Lu
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. Adjustment Procedure
6. Troubleshooting Flow Chart
7. Recommended Spare Parts List
8. Exploded Diagram and Spare Parts List
9. Block Diagram
10. Schematic Diagrams
11. PCB Layout Diagrams
1
3
7
13
19
32
34
49
58
59
65
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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 a high quality, safety approved AC/DC power cord.
(5) Disconnect the power plug from the AC outlet if the product will not be 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 containing excessive dust and dirt.
- Near any appliance generating a strong magnetic field.
- 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 connecting or disconnecting input connector.
(3) Wipe off water drops 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 ensure human earth when handling.
(7) Do not open or modify the Module Assembly.
(8) Do not press the reflector sheet at the back of the module in any direction.
(9) In the event that a Module must be put back into the packing container slot after it was taken out of 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 or 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 or
bend the TFT Module even momentarily. When designing the enclosure, it should be taken into consideration
that no bending/twisting forces may be applied to the TFT Module from outside. Otherwise the TFT Module
may be damaged.
(12) The cold cathode fluorescent lamp in the LCD contains a small amount of mercury. Please follow local
ordinances or regulations for disposal.
(13) The LCD module contains a small amount of materials having no flammability grade. The LCD module
should be supplied with power that complies with the requirements of Limited Power Source
(IEC60950 or UL1950), or an exemption should be applied for.
(14) The LCD module is designed so that the CCFL in it is supplied by a Limited Current Circuit (IEC60950
or UL1950). Do not connect the CCFL to a Hazardous Voltage Circuit.
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2. Specification
(VA521/VE510s-2/VE510b-2)
2.1. PRODUCT SPECIFICATION
LCD Panel 15.0" TFT
Power Management Energy Star compliant VESA
DPMS compatible
< 1W
Displayable Resolution XGA 1024×768 (max.)
Pixel Dimension 0.297× 0.297mm
LCD Display Color 16.2M Color Max. (6 bit+FRC)
Viewing Angle CR
Horizontal: 130°
Vertical: 100°
Tilt +20°~ 0°
Contrast Ratio
Brightness 200 cd/m2 (min.)
Response Time
Active Display Area 304.1mm× 228.1mm
Temperature Operating: 0°C ~ +35°C
Storage: -20°C ~ +60°C
Power Input Voltage: 100 ~ 240 Vac
Consumption: 30 Watts (Max.)
≧10
400: 1 (min.)
500: 1 (typ.)
250 cd/m2 (typ.)
Tr + Tf : 25ms (typ.)
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2.2. SUPPORTED TIMING CHART
ITEM 1 2 3 4 5
TIMING 640×350@70Hz 640×480@60Hz 640×480@67Hz 640×480@75Hz 640×480@72Hz
Pixel Rate 25.175MHz 25.175MHz 30.240MHz 31.500MHz 31.500MHz
H TOTAL 31.778us 31.778us 28.571us 26.667us 26.413us
H DISPLAY
25.422us 25.422us 21.164us 20.317us 20.317us
H B-Porch 1.907us 1.907us 3.175us 3.810us 4.063us
H Width 3.813us 3.813us 2.116us 2.032us 0.270us
H Border 0.318us 0.318us 0.000us 0.000us 0.000us
V TOTAL 14.268ms 16.683ms 15.000ms 13.334ms 13.734ms
V DISPLAY
11.122ms 15.253ms 13.714ms 12.800ms 12.678ms
V B-Porch 1.907ms 1.049ms 1.114ms 0.427ms 0.528ms
Vs Width 0.064ms 0.064ms 0.086ms 0.080ms 0.079ms
V Border 0.191ms 0.254ms 0.000ms 0.000ms 0.000ms
H/V Sync +/- -/- -/- -/- -/Interlace No No No No No
ITEM 6 7 8 9 10
TIMING 640×480@85Hz 720×400@70Hz 800×600@56Hz 800×600@60Hz 800×600@72Hz
Pixel Rate 36.000MHz 28.322MHz 36.000MHz 40.000MHz 50.000MHz
H TOTAL 22.111us 31.778us 28.444us 26.400us 20.800us
H DISPLAY
17.778us 25.422us 22.222us 20.000us 16.000us
H B-Porch 2.222us 1.907us 3.556us 2.200us 1.280us
H Width 1.556us 3.813us 2.000us 3.200us 2.400us
H Border 0.000us 0.318us 0.000us 0.000us 0.000us
V TOTAL 11.764ms 14.268ms 17.778ms 16.579ms 13.853ms
V DISPLAY
11.093ms 12.711ms 17.066ms 15.840ms 12.480ms
V B-Porch 0.578ms 1.112ms 0.626ms 0.607ms 0.478ms
Vs Width 0.069ms 0.064ms 0.057ms 0.106ms 0.125ms
V Border 0.000ms 0.222ms 0.000ms 0.000ms 0.000ms
H/V Sync -/- -/+ +/+ +/+ +/+
Interlace No No No No No
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ITEM 11 12 13 14 15
TIMING 800×600@75Hz 800×600@85Hz 832×624@74.5Hz 1024×768@60Hz 1024×768@70Hz
Pixel Rate 48.500MHz 56.250MHz 57.280MHz 65.000MHz 75.000MHz
H TOTAL 21.333us 18.631us 20.112us 20.677us 17.707us
H DISPLAY
16.162us 14.222us 14.525us 15.754us 13.653us
H B-Porch 3.232us 2.702us 3.771us 2.462us 1.920us
H Width 1.616us 1.138us 1.118us 2.092us 1.813us
H Border 0.000us 0.000us 0.000us 0.000us 0.000us
V TOTAL 13.333ms 11.756ms 13.417ms 16.666ms 14.272ms
V DISPLAY
12.800ms 11.179ms 12.552ms 15.880ms 13.599ms
V B-Porch 0.448ms 0.503ms 0.784ms 0.600ms 0.513ms
Vs Width 0.064ms 0.056ms 0.060ms 0.124ms 0.106ms
V Border 0.000ms 0.000ms 0.00ms 0.000ms 0.000ms
H/V Sync +/+ +/+ -/- -/- -/Interlace No No No No No
ITEM 16 17
TIMING 1024×768@72Hz 1024×768@75Hz
Pixel Rate 77.066MHz 78.750MHz
H TOTAL 17.232us 16.660us
H DISPLAY
13.287us 13.003us
H B-Porch 1.869us 2.235us
H Width 1.765us 1.219us
H Border 0.000us 0.000us
V TOTAL 13.889ms 13.328ms
V DISPLAY
13.234ms 12.795ms
V B-Porch 0.500ms 0.466ms
Vs Width 0.103ms 0.050ms
V Border 0.000ms 0.000ms
H/V Sync -/- +/+
Interlace No No
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2.3. D-SUB CONNECTOR
D-SUB 15 PIN CONNECTOR
1. Red Video 6. Red GND 11. NC
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
2. Green Video 7. Green GND 12. SDA
3. Blue Video 8. Blue GND 13. H-sync
4. NC 9. +5V for DDC 14. V-sync
5. GND 10. GND 15. SCL
SIGNAL LEVEL
CONNECTOR
SIGNAL DESCRIPTION
R RED 0.7vp-p (VIDEO)
G GREEN 0.7vp-p (VIDEO)
B BLUE 0.7vp-p (VIDEO)
H H/SYNC TTL positive or negative
V V/SYNC TTL positive or negative
SDA DDC1/2B TTL
SCL DDC1/2B TTL
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3. Front Panel Function Control Description
VA521/VE510s-2/VE510b-2
Main Menu
with OSD controls
Displays, saves
changes to, and exits
the Main Menu.
Selects a highlighted control. Also,
displays the control screen for the
selected control and toggles
between control pairs.
Front Control Panel
Lights up to indicate power on.
Scrolls through menu
options and adjusts the
displayed control.
Turns the power on and off.
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Do the following to adjust the screen image:
1
To display the Main Menu, press button [1].
Main Menu
AUTO
SET
?
1:EXIT 2:SELECT
Auto Adjust
Contrast/Brightness
Color Adjust
Information
i
Image Adjust
Setup Menu
Memory Recall
NOTE: All OSD menus and adjustment screens disappear automatically
after about 15 seconds. This time period is adjustable through the Setup
menu and the OSD timeout control described on page 11.
2
Press I or J to scroll up or down in the Main Menu until the desired control
is highlighted.
3
To select the highlighted control, press button [2]. A control screen appears
as shown below.
Contrast
1:EXIT 2: Brightness
4
To adjust the control, press the up I or down J buttons.
5
To save the adjustments and exit the menu, press button [1] twice.
The line at the
bottom of the screen
shows the current
functions of buttons
1 and 2: Exit or Select
the control that is
highlighted.
The following tips may help you optimize your display:
• Adjust your computer's graphic card so that it outputs a video signal 1024 x
768 @ 60 Hz to the LCD display. (Look for instructions on “changing the
refresh rate” in your graphic card's user guide.)
• If necessary, make small adjustments using H. POSITION and V. POSITION
until the screen image is completely visible
. (The black border around the
edge of the screen should barely touch the illuminated “active area” of the
LCD display.)
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Main Menu Controls
Adjust the menu items shown below by using the up Iand down Jbuttons.
Control Explanation
Auto Adjust
automatically sizes, centers, and fine tunes the
video signal to eliminate waviness and distortion.
Press the [2] button to execute the Auto Adjust function.
NOTE
: Auto 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.
Contrast
adjusts the difference between the image background
(black level) and the foreground (white level).
Brightness
Color Adjust provides several color options, including preset color
adjusts background black level of the screen image.
temperatures and a user mode which allows the red (R), green
(G), and blue (B) levels to be adjusted independently.
The factory setting for this product is 6500K
(6500 Kelvin).
sRGB
— sRGB is quickly becoming the industry standard for
color management, with support being included in many of the
latest applications. Enabling this setting allows the LCD display
to more accurately display colors the way they were originally
intended. Enabling the sRGB setting will cause the Contrast and
Brightness adjustments to be disabled.
9300K
— Adds blue to the screen image for cooler white (used
in most office settings with fluorescent lighting).
6500K
— Adds red to the screen image for warmer white and
richer red.
5400K
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— Adds green to the screen image for a darker color.
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Control Explanation
User Color
and blue (B)
To select color (R, G or B) press button [2].
1
To adjust selected color, press ▲ or ▼.
2
Important
— Individual adjustments for red (R), green (G),
.
: If you select RECALL from the Main Menu when
the product is set to a Preset Timing Mode, colors return to the
6500K factory preset.
i
coming from the graphics card in your computer. See your
Information
displays the timing mode (video signal input)
graphic card’s user guide for instructions on changing the
resolution and refresh rate (vertical frequency).
VESA 1024 x 768 @ 60 Hz (recommended) means that the
resolution is 1024 x 768 and the refresh rate is 60 Hertz.
Information
H. Frequency: 48.60 KHz
V. Frequency: 60.00 Hz
Pixel Clock: 65.00 MHz
Resolution: 1024 x 768
Model Number: VLCDS23585-2W
Serial No:
www.viewsonic.com
1:EXIT
Image Adjust
Image Adjust
H./V. Position
H. Size
Fine Tune
Sharpness
1:EXIT 2:SELECT
The Image Adjust controls are explained below:
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.
H. Size
(Horizontal Size) adjusts the width of the screen image.
NOTE:
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Vertical size is automatic with your LCD display.
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Control Explanation
Fine Tune sharpens the focus by aligning text and graphics with
display pixels.
NOTE:Try Auto Adjust before using the Fine Tune control.
?
Sharpness
adjusts the clarity and focus of the screen image.
Setup Menu displays the menu shown below.
Setup Menu
Language Select
Resolution Notifier
OSD Position
OSD
OSD Timeout
1:EXIT 2:SELECT
The Setup Menu controls are explained below.
L
anguage
Select allows you to choose the language used in
the menus and control screens.
OSD
Resolution Notice
Resolution Notice
For best picture quality
change the resolution to
1024 x 768
1:EXIT 2:DISABLE
OSD Position
advises the optimal resolution to use.
allows you to move the on-screen display menus
and control screens.
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 screen
disappears.
Memory Recall
returns adjustments to the original factory
settings if the display is operating in a factory Preset Timing
Mode listed in the user guide.
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Short Cut Keys
The five function keys are:
[1] Main Menu
[2] Auto Image Adjust
[▼▼▼▼] or [▲▲▲▲]
[▼▼▼▼] + [▲▲▲▲]
[1] + [2] Toggle between 720x400 and 640x400
[1] + [▼▼▼▼] + [▲▲▲▲]
(Push and hold for 5 sec)
[1] + [▼▼▼▼]
[1] + [▲▲▲▲]
1 2 ▼
▼▼▼
Directly access the Contrast menu.
Switch to the Brightness menu by
pushing button [2].
Reset the Contrast or Brightness value
while in the Contrast or Brightness
adjustment menu, or reset both Contrast
and Brightness when the OSD is not open.
modes when the input signal resolution is
720x400 or 640x400.
White Balance.
Power Lock
OSD Lock
▲▲▲▲
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4. Circuit Description
A. AC-DC CONVERTER
The power supply with a highly-integrated green-mode PWM controller provides several features to enhance the
performance of power flyback converters.
I801 is a PWM controller and provides many protection functions.
I802 is a photo couple to transfer the feedback signal from the far side of the feedback loop, while I803 detects
both of the output DC voltage levels (3.3V and 12V).
D813 monitors the voltage on I801; Q805 pulls down the voltage on I801 pin5 to shut down I801 in the event that
the feedback loop fails.
R826 is a dynamic load which is active when the backlight is turned off and the rest of the system is still on. It
keeps the 12V output voltage under 13V to protect the panel. After the system enters power saving mode, R826 is
not loaded. This is detected by I804, and Q803 controls whether R826 is loaded or not.
B. Scaling controller
The RTD2013 ADC converts the RGB analog signal to a digital signal that the scaling chip can recognize.
The HSYNC input receives a logic signal and provides the frequency reference for pixel clock generation.
The scaling IC converts the input signal, whose resolution can range from VGA to XGA, into the XGA resolution
that the panel expects.
General
.
mbedded dual DDC supports DDC1, DDC2B, DDC/CI
E
.
Image scaling up and down
.
E
mbedded Pattern Generator
.
No external memory required
.
equire s only one crystal to generate all timing
R
.
mbedded reset control output
E
.
Embedded crystal output to M ICROP
.
3-channel PWM output (8 bits per channel), and selectable PWM clock frequency
PIN DESCRIPTION
(I/O Legend: A= Analog , I=Input ,O=Output ,P=Power ,G=Ground)
■ ADC: 15 pins
Name I/O Pin No Description Note
ADC_ GND AG 27 ADC ground
ADC_REFIO AP 28 ADC band-gap voltage de-coupling 1.20V
ADC_VDD AP 29 Analog power (3.3V)
BLUE+ AI 30 Analog input from BLUE channel
BLUE- AI 31 Analog input ground from BLUE channel
ADC_ GND AG 32 ADC ground
SOG/ADC_TEST AIO 33 SOG in/ADC test pin
GREEN+ AI 34 Analog input from GREEN channel
GREEN- AI 35 Analog input ground from GREEN channel
ADCB_VDD AP 36 Analog power (3.3V)
RED+ AI 37 Analog input from RED channel
RED_ AI 38 Analog input ground from RED channel
ADC_GND AG 39 Analog ground
ADC_GND AG 40 Analog ground
ADC_VDD AP 41 Analog power (3.3V)
AHS AI 42 Analog HS input (10), (4), (5)
AVS AI 43 Analog VS input (2), (4), (5)
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¦ PLL:8 pins
Name I/O Pin No Description Note
XO AI 1 Reference clock output
XI AO 2 Reference clock input
DPLL GND AG 3 Ground for digital PLL
DPLL VDD AP 4 Power for digital PLL (3.3V)
APLL VDD AP 5 Power for multi-phase PLL (3.3V)
PLL TEST1 AIO 6 Test Pin 1 / IRQ# 3.3V tolerance
PLL TEST2 AIO 7 Test Pin 2 / Power-on-latch for crystal out
frequency
APLL GND AG 8 Ground for multi-phase PLL
¦ Control Interface: 7 pins
Name I/O Pin No Description Note
SDIO [0] IO 54 Serial control I/F data in/Parallel port data
(2), (3), / 2mA
[0]
SDIO [1] / TCON [4] /
BBLU [0]
SDIO [2] / TCON [3] /
BBLU [1]
SDIO [3] / PWM2 /
TCON [2]
IO 53 Parallel port data [1] / TCON [4] / TTL
BBLU [0]
IO 52 Parallel port data [1] / TCON [3] / TTL
BBLU [1]
(1), (2), (3), /
2mA
(1), (2), (3), /
2mA
IO 51 Parallel port data [1] / TCON [4] / PWM2 (1), (2), (3), /
2mA
SCLK I 50 Serial control I/F clock (2), (3), (5)
SCSB I 111 Serial control I/F chip select (2), (3), (5)
RESET O 56 RESET output for Micron (2), (5), (6) / 2mA
■ Display & TCON/VIDEO-8 Port: 54 pins
:LVDS+RSDS+TTLO :RSDS+TTLO :RSDS+TTLIO :TTLO :TTLIO
Pin
NO
51 S [3] /
52 S [2] /
6-bits Dual
RSDS
TCON [2] /
PWM2
TCON [3]
6-bits Single
RSDS
S 3] /
TCON [2] /
PWM2
S [2] /
TCON [3]
8/6 bits
Dual/Single
LVDS
S [3] /
TCON [2] /
PWM2
S [2] /
TCON [3]
8 bits
Dual/Single
TTL
S [3] /
TCON [2] /
PWM2
S [2] /
BBLU [1] /
6 bits Dual
TTL
S [3] /
TCON [2] /
PWM2
S [2] /
TCON [3]
6 bits Single
TTL
S [3] /
TCON [2] /
PWM2
S [2] /
TCON [3]
Note
(1), (2), (3), /
2mA
(1), (2), (3), /
2mA
TCON [3]
53 S [1] /
TCON [4]
S [1] /
TCON [4]
S [1] /
TCON [4]
S [1] /
BBLU [0] /
S [1] /
TCON [4]
S [1] /
TCON [4]
(1), (2), (3), /
2mA
TCON [4]
55 PWM2 /
COUT /
TCON [13]
PWM2 /
COUT /
TCON [13]
PWM2 /
COUT /
TCON [13]
PWM2 /
COUT /
TCON [13]
PWM2 /
COUT /
TCON [13]
PWM2 /
COUT /
TCON [13]
(1), (2), (3), /
2mA
59 BB3P BB3P NC BBLU [7] BBLU [7] BBLU [7]
60 BB3N BB3N NC BBLU [6] BBLU [6] BBLU [6]
61 BB2P BB2P NC BBLU [5] BBLU [5] BBLU [5]
62 BB2N BB2N NC BBLU [4] BBLU [4] BBLU [4]
63 BB1P BB1P NC BBLU [3]
BBLU [3] BBLU [3]
/T0
64 BB1N BB1N NC BBLU [2]
BBLU [2] BBLU [2]
/T1
65 BCLKP BCLKP NC BGRN [1] /
TCON [6] TCON [6]
T2
66 BCLKN BCLKN NC BGRN [0] /
T3
TCON [5] TCON [5]
67 BG3P BG3P NC BGRN [7] BGRN [7] BGRN [7]
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68 BG3N BG3N NC BGRN [6] BGRN [6] BGRN [6]
73 BG2P BG2P TODP
74 BG2N BG2N TODN
75 BG1P BG1P TOCLKP
76 BG1N BG1N TOCLKN
77 BR3P BR3P TOCP
78 BR3N BR3N TOCN
79 BR2P BR2P TOBP
80 BR2N BR2N TOBP
81 BR1P BR1P TOAP
82 BR1N BR1N TOAP
85 AB3P NC TEDP
86 AB3N NC TEDN
87 AB2P NC TECLKP
88 AB2N
89 AB1P
90 BB1N
91 ACLKP
92 ACLKN
93 AG3P
AG3N NC
94
AG2P
99
AG2N TCON [10] NC AGRN [4] /
100
AG1P TCON [9] NC AGRN [3] /
101
AG1N TCON [8] NC AGRN [2] /
102
103 AR3P
104 AR3N
105 AR2P
106 AR2N
107 AR1P
NC
NC
NC
NC
NC
NC
TECLKN
TECP
TECN
TEBP
TEBN
TEAP
TEAN
TCON [11]
NC AGRN [5] /
TCON [7] NC ARED [7] /
TCON [6] NC ARED [6] /
TCON [5] NC ARED [5] /
TCON [1] NC ARED [4] /
TCON [0] NC ARED [3] /
BGRN [5] /
T4
BGRN [4] /
T5
BGRN [3] /
T6
BGRN [2] /
T7
BRED [7] /
T8
BRED [6] /
T9
BRED [5] /
T10
BRED [4] /
T11
BRED [3] /
T12
BRED [2] /
T13
ABLU [7] /
T14
ABLU [6] /
T15
ABLU [5] /
T16
ABLU [4] /
T17
ABLU [3] /
T18
ABLU [2] /
T19
ABLU [1] /
T20
ABLU [0] /
T21
AGRN [7] /
T22
AGRN [6] /
T23
T24
T25
T26
T27
T28
T29
TH
TV
TE
BGRN [5] BGRN [5]
BGRN [4] BGRN [4]
BGRN [3] BGRN [3]
BGRN [2] BGRN [2]
BRED [7] BRED [7]
BRED [6] BRED [6]
BRED [5] BRED [5]
BRED [4] BRED [4]
BRED [3] BRED [3]
BRED [2] BRED [2]
ABLU [7] ABLU [7]
ABLU [6] ABLU [6]
ABLU [5]
ABLU [5]
ABLU [4] ABLU [4]
ABLU [3] ABLU [3]
ABLU [2] ABLU [2]
TCON [1] TCON [1]
TCON [0] TCON [0]
AGRN [7] AGRN [7]
AGRN [6] AGRN [6]
AGRN [5] AGRN [5]
AGRN [4] AGRN [4]
AGRN [3] AGRN [3]
AGRN [2] AGRN [2]
ARED [7] ARED [7]
ARED [6] ARED [6]
ARED [5] ARED [5]
ARED [4] ARED [4]
ARED [3] ARED [3]
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108 AR1N NC
113 PWM2 /
COUT /
TCON [12]
114 TCON [11]
PWM2 /
COUT /
TCON [12]
V [0] V [0] ARED [0] TCON [11] (1), (7), (8)
NC ARED [2] /
TK
PWM2 /
ARED [1] COUT PWM2 /
COUT /
TCON [12]
ARED [2] ARED [2]
(9)
COUT /
TCON [12]
/V [0]
115 TCON [10]
V [1] V [1] BRED [1] TCON [10] (1), (7), (8)
/V [1]
116 TCON [9] /
V [2] V [2] BRED [0] TCON [9] (1), (7), (8)
V [2]
117 TCON [8] /
V [3] V [3] AGRN [1] TCON [8] (1), (7), (8)
V [3]
118 TCON [7] /
V [4] V [4] AGRN [0] TCON [7] (1), (7), (8)
V [4]
119 TCON [6] /
V [5] V [5] DHS DHS DHS (1), (7), (8)
V [5]
122 TCON [5] /
V [6] V [6] DVS DVS DVS (1), (7), (8)
V [6]
123 TCON [1] /
V [7]
124 TCON [0] /
V [7] V [7] DENA
DENA DENA (1), (7), (8)
VCLK VCLK DCLK DCLK DCLK (1), (7), (8)
VCLK
*Single RSDS, even/odd swap, data (59~82) output to pin85~108, TCON (99~108) output to pin59~68.
*In 6-bit dual TTL output mode, Video8 cannot output TCON7~TCON11; while video8 can output TCON in
6-bit single TTL mode.
■ TMDS: 18 pins
Name I/O Pin No Description Note
TMDS_TST/ PWM1 AIO 9 TMDS_TEST Pin / PWM1 / Power-on-latch
for serial / parallel port
TMDS_GND G 10
TMDS_VDD P 11 (3.3V)
NC A 12 Impedance Match Reference.
TMDS_VDD P 13 (3.3V)
NC I 14 Differential Data Input
NC I 15 Differential Data Input
TMDS_GND G 16
NC I 17 Differential Data Input
NC I 18 Differential Data Input
TMDS_VDD P 19 (3.3V)
NC I 20 Differential Data Input
NC I 21 Differential Data Input
TMDS_GND G 22
NC I 23 Differential Data Input
NC I 24 Differential Data Input
TMDS_GND G 25
TMDS_VDD P 26 (3.3V)
■ PWM Interface: (PWM1, PWM2 can be selected from 1 of 3 possible pins.)
Name I/O Pin No Description Note
PWM2 / TCON [2] / S
[3]
PWM2 / TCON [13] /
COUT
PWM2 / TCON [12] /
COUT
O 51 PWM2 / TCON [2] / SDIO [3] (1), (2), (3), (5),
(8),
O 55 PWM2 / TCON [13] / Crystal out (2), (8), (9)
O 113 PWM2 / TCON [12] / Crystal out (2), (8), (9) 6bit
dual TTL cannot
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PWM1 / TMDS_TST AIO 9 PWM1/ TMDS_TEST Pin/ Power-on-latch
PWM1 / DDCSDA /
TCON [1] / BBLU [0]
PWM1 / TCON [7] IO 125 PWM1 / TCON [7] (1), (2), (3), (5),
PWM0 / REFCLK IO 112 PWM0 / (In / out) test pin for DCLK /
■ DDC Channel:4 pins
DDCSCL/TCON [0] /
BBLU [1]
DDCSDA/TCON [1] /
PWM1/BBLU [0]
TCON [5] I 126 TCON [5] (2), (3), (5)
TCON [7]/PWM1 IO 125 TCON [7]/ PWM1 (1), (2), (3), (5),
■ Power & Ground:22 pins
3.3V Power P 49,121 VCCIO: 2
3.3V Ground G 48,120 GNDIO: 2
3.3V Power P 58,71,83, 95,110 PVCC: 5
3.3V Ground G 57,72,84,96,109 PGND: 5
2.5V Power P 45,69,98,127 VCCK: 4
2.5V Ground G 44,70,97,128 GNDK: 4
Note: (1) TTL compatible CMOS Input (Vt=1.7V); VCC=3.3V;
(2) 5V tolerance pad;
(3) Internal 75K Ohms pull high resistor.
(4) Internal 75K Ohms pull low resistor.
(5) Schmitt trigger CMOS Input (Vt=1.4~2.2V);
(6) Open-Drain, Output Drive low & Pull-high.
(7) Bi-directional input/output
(8) Programmable driving current (2~10mA)
(9) TTL output 5V & 3.3V
(10) 4V tolerance pad
C. MTV312M64
The MTV312M micro-controller is an 8051 CPU core embedded device especially tailored for CRT/LCD
monitor applications. It includes an 8051 CPU core, 1024-byte SRAM, 14 built-in PWM DACs, VESA DDC
interface, 4-channel A/D converter, and a 64K-byte internal program Flash-ROM.
Pins specified as “CMOS output pin” can sink and drive at least 4mA current. It is not recommended to use such
pins as input pins.
Pins specified as “open drain pin” can sink at least 4mA current but only drive 10~20uA to VDD. They can be
used as input or output pins, and require an external pull up resistor.
A “8051 standard pin” is a pseudo open drain pin. It can sink at least 4mA current when the output signal is low,
drives at least 4mA current for 160nS when the output signal transits from low to high, then continues driving at
100uA to maintain the pin at the high level. It can be used as an input or output pin. It requires an external pull up
resistor when driving a heavy load.
support
(2), (7), (8)
for serial / parallel port
IO 47 PWM1 / DDC serial control I/F data input /
output / TCON [4]
(1), (2), (3), (5),
(8),
(8),
(2), (9)
Video8 even-odd signal
Name I/O Pin No Description Note
I 46 DDC serial control I/F clock/TCON [0]/TTL
(2), (3), (5)
BBLU [1]
IO 47 DDC serial control I/F data input/ output/
TCON [1]/ PWM1/ TTL BBLU [0]
(1), (2), (3), (5),
(6), (8)/8mA/no
slew
(6), (8)/8mA/no
slew
Name I/O Pin No Description
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POWER CONFIGURATION
The MTV312M uses a 5V or 3.3V power supply.
In a 5V power system, the VDD pin is connected to the 5V source and VDD3 requires an external capacitor, and all
output pins can swing from 0~5V. The input pins can accept an input range of 0~5V, but the X1 and X2 pins must
be kept below 3.3V.
Also, the ADC conversion range is 5V.
In a 3.3V power system, VDD and VDD3 are connected to the 3.3V source, and all output pins swing from
0~3.3V. HSYNC, VSYNC and open drain pins can accept an input range of 0~5V, but all other pins must be kept
below 3.3V. Also, the ADC conversion range is 3.3V.
D. INVERTER
In order to drive the CCFLs embedded in the panel module, there is a push-pull inverter to convert the input
voltage
from the input level of 12V DC up to an output level of hundreds of volts AC peak to peak.
The inverter is composed of symmetric sections that drive the separate lamp modules.
The input stage consists of a PWM controller, push-pull inverter, and a switching MOSFET to convert DC input
into AC output.
The output stage consists of a tuning capacitor, transformer, and push-pull MOSFET pair to boost the AC output
up to hundreds of volts peak to peak.
There is also one resistor in series with the lamp for output voltage feedback.
The system controls the inverter by means of two signals: a logical “low” level is sent to the I901 to turn on the
inverter, while
the BRI signal controls the brightness via the DC level, which is integrated from the PWM signal.
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5. Adjustment Procedure
(VA521/VE510s-2/VE510b-2)
5.1. ADJUSTMENT CONDITIONS AND PRECAUTIONS
1. Approximately 30 minutes should be allowed for the system to warm up before proceeding.
2. Adjustments should be undertaken only on necessary elements since most of them have been carefully preset
at the factory.
3. ESD protection is required before adjustment.
5.2. MAIN ADJUSTMENTS
NO. FUNCTION DESIGNATION
1. Eeprom Initial Function Key
2. White Balance Function Key
5.3. ALIGNMENT PROCEDURES
Adjustment Conditions and Precautions:
(A). Power supply voltage:
AC 110/120V±10% 60 Hz±5%, AC 220/240V±10% 50 Hz ±5%.
(B). Warm up time:
The display must be power ON for at least 30 minutes at full white pattern before starting alignments.
This is especially critical in color temperature and white balance adjustments.
(C). Signals: refer to the front detail specifications and timing table.
Video: refer to the front detail specifications.
1. Adjustment of V-com Voltage:
A. Timing: 1024x768@60Hz vertical, 48KHz horizontal.
B. Pattern: The Windows shut-down screen or full-screen pixel ON/OFF pattern.
2. Eeprom Initial:
A. Timing: 1024x768@60Hz.
B. Pattern: Cross hatch.
C. Switch off the power and press the “▲” and “ 2 ” keys simultaneously, switch on the power, then enter
factory mode by pressing the “ 1 ” key.
D. Select the “EEPROM INIT” item in the factory menu and press the “ 2 ” key to reset the Eeprom.
3. White Balance Adjustment:
A. Timing: 1024x768@60Hz.
B. Pattern: 16Gray Level or 5-MOSAIC (Pattern 42).
C. Set CA210 color analyzer at the center of screen and along a perpendicular to the screen at 0cm from
the display.
D. Press the “▼” key to select the “ WHITE BALANCE” item in the factory mode, then press “ 2 ” key
to automatically adjust the white balance.
E. Color temperature verification: (Set Brightness and Contrast to Maximum)
Verifying 6500K: press the “▼”, “▲” keys to select 6500K in factory mode, press the “ 2 ” key, then
confirm that the color temperature is
x = 0.313 ± 0.02
y = 0.329 ± 0.02
Y ≧ 200 cd/m
2
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