digitalview AL-1280 User manual

ANALOG INTERFACE CONTROLLER
FOR SXGA, XGA, SVGA, VGA RESOLUTION TFT LVDS LCD
Model: AL-1280
(Part number: 4169300-1X or up)
INSTRUCTIONS
CONTENTS
Page: 2. Introduction
2. System design – Diagram of a suggested system
3. Assembly notes – Important information about system elements
4. Connection & Operation – How to use the controller
7. Connectors, pinouts & jumpers – Essential connection information
12. Controller dimensions
13. Application notes
14. Troubleshooting
15. Specifications
18. Warranty, Caution & Limitation of Liability
18. Contact details
It is essential that the sections on Assembly Notes and Connectors, Pinouts &
Jumpers is read and understood before connecting or powering up this controller.

Page 2
INTRODUCTION
Designed for LCD monitor and other flat panel display applications, the AL-1280 controller provides easy to use
interface controller for:
 TFT (active matrix) LCDs with LVDS interface of 1280x1024, 1024x768, 800x600, 640x480 resolution;
 Computer video signals of SXGA, XGA, SVGA, VGA standard
 Internal built-in LVDS Tx chips to support LVDS panel without using LVDS adaptor board
HOW TO PROCEED
Ensure you have all parts and that they are correct, refer to:
Connection diagram (separate document for each panel)
Connector reference (in following section)
Assembly notes
Check controller switch and jumper settings (errors may damage the panel)
Prepare the PC
Connect the parts
Understand the operation and functions ( in following section)
IMPORTANT USAGE NOTE
This product is for use by system developers and integrators, the manufacturer accepts no liability for damage or injury caused
by the use of this product. It is the responsibility of the developer, integrators or other user of this product to:
Ensure that all necessary and appropriate safety measures are taken.
Obtain suitable regulatory approvals as may be required.
Check power settings to all component parts before connection.
Understand the operation and connectivity requirements of this controller.
DISCLAIMER
There is no implied or expressed warranty regarding this material.
SYSTEM DESIGN
A typical LCD based display system is likely to comprise the following:
Summary:
1. LCD panel
2. LCD controller card, AL-1280
3. LVDS cable (for connection with LVDS panel)
4. Inverter for CCFT backlight (if not built into LCD)
5. Inverter cable
6. Function controls
7. Function controls cable
8. Status LED
9. PC VGA (analog) in
10. Power input (12VDC)
11. External panel power input (for 12V~18V panel power panel only)
Digital View offers a range of accessories such as listed above, to make up complete display solution.

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ASSEMBLY NOTES
This controller is designed for monitor and custom display projects using 1280x1024, 1024x768, 800x600, 640x480 resolution
TFT LVDS LCD’s support. The following provides some guidelines for installation and preparation of finished display solution.
Preparation: Before proceeding it is important to familiarize yourself with the parts making up a system and the various
connectors, mounting holes and general layout of the controller. As much as possible connectors have been labeled.
Guides to connectors and mounting holes are shown in the following relevant sections.
LCD Panel: This controller is designed for typical LVDS interface TFT panels with panel voltage 3.3V or 5V or 12V,
External for 12V~18V LVDS interface. Due to the variation between manufacturers of signal timing and other panel
characteristics factory setup and confirmation should be obtained before connecting to a panel. (NOTE: Check panel
power jumper settings before connection)
Controller card: Handle the controller card with care as static charge may damage electronic components.
LVDS signal cable : In order to provide a clean signal it is recommended that LVDS signal cables are no longer than
46cm (18 inches). If loose wire cabling is utilized these can be made into a harness with cable ties. Care should be taken
when placing the cables to avoid signal interference. Additionally it may be necessary in some systems to add ferrite cores
to the cables to minimize signal noise.
Inverter: This will be required for the backlight of an LCD, some LCD panels have an inverter built in. As panels may have
1 or more backlight tubes and the power requirements for different panel models backlights may vary it is important to
match the inverter in order to obtain optimum performance. See page 13 for the Application notes “Inverter connection
section for more informations.
Inverter Cables: Different inverter models require different cables and different pin assignment. Make sure correct cable
pin out to match the inverter. Using wrong cable pin out may damage the inverter.
Function Controls: The following section ‘Operation’ discusses the controls required and the section ‘Connectors,
jumpers & pinouts’ provides the detail. The controls are minimal for ease of use: On/Off, Brightness (depends on inverter),
OSD (5 momentary buttons).
Function controls cable: The cables to the function switches should be of suitable quality and length so that impedance
does not affect performance. Generally lengths up to 1 metre (3 feet) should be acceptable.
Status LED: The pin direction of the LED should be corrected for right colour indication. Red colour stands for standby.
Green colour stands for signal on. It is an optional part only, can be unconnected.
Analog VGA Input Cable: As this may affect regulatory emission test results and the quality of the signal to the controller,
a suitably shielded cable should be utilized.
Power Input: 12V DC is required, this should be a regulated supply. Although the controller provides power regulation for
the LCD power this does not relate to the power supplied to the backlight inverter. If an unregulated power supply is
provided to an inverter any fluctuations in power may affect operation, performance and lifetime of the inverter and or
backlight tubes.
Power Safety: Note that although only 12VDC is supplied as ‘power-in’ a backlight inverter for panel backlighting
produces significantly higher voltages (the inverter does not connect to the ground plane). We strongly advise appropriate
insulation for all circuitry.
EMI: Shielding will be required for passing certain regulatory emissions tests. Also the choice of external Controller to PC
signal cable and power supply can affect the result.
Ground: The various PCB mounting holes are connected to the ground plane.
Servicing: The controller is not user serviceable or repairable. Warranty does not cover user error in connecting up to the
controller and is invalidated by unauthorized modification or repairs.

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Controller Mounting: It is recommended that a clearance of at least 10mm is provided above and 5mm below the
controller when mounted. Additionally consideration should be given to:
 Electrical insulation
 Grounding.
EMI shielding.
Cable management. Note: It is important to keep panel signal cables apart from the inverter & backlight cables to
prevent signal interface.
Heat & ventilation: Heat generated from other sources, for example the backlight of a very high brightness panel may
generate significant heat which could adversely affect the controller.
Other issues that may affect safety or performance.
PC Graphics Output: A few guidelines:
Signal quality is very important, if there is noise or instability in the PC graphics output this may result in visible noise
on the display.
Vertical refresh rate should be set to 60Hz preferable.
Non-interlaced is required.
IMPORTANT: Please read the Application Notes section for more information.
CONNECTION & OPERATION
CAUTION: Never connect or disconnect parts of the display system when the system is powered up as this may cause serious
damage.
CONNECTION
Connection and usage is quite straight forward (it is useful to have the relevant connection diagram available at this time):
1. LCD panel & Inverter: Connect the inverter (if it is not built-in the panel) to the CCFT lead connector of the LCD
panel.
LVDS type panels:Plug the LVDS signal cable direct to CN5, CN6 / CN6A (if necessary). Insert the panel end of the
cable the LCD panel connector.
2. Inverter & Controller: Plug the inverter cable to CNB1 and CNA1 (if necessary). Plug another end to the connector
on the inverter.
3. Function switch & Controller: Plug the OSD switch mount cable to CNC1 on the controller board and another to the
OSD switch mount.
4. LED & Controller: Plug in a 3-way with dual colour LED to connector LED1 on the controller board.
5. Jumpers : Check all jumpers are set correctly. Details referring the connection diagram at
http://www.digitalview.com/controllers/csg.php
6. Jumpers & Inverter & Panel voltage: Particularly pay attention to the settings of JA3, JB2, JB3, JA5. JB2 & JB3
are used for inverter control (read inverter specification and information on the jumper table to define the correct
settings). JA3 & JA5 are used for panel voltage input (read panel specification and information on the jumper table to
define the correct settings).
7. VGA cable & Controller: Plug the VGA cable to the connector P1 on the controller board.
8. Power supply & Controller: Plug the DC 12V power in to the connector PP1 or PP2/PP3
9. Power on: Switch on the controller board and panel by using the OSD switch mount.
The red LED will light up when power on with the presence of input signal. The LED will change to green.
General:
If you are using supplied cables & connectors, ensure they are correct for the model of panel and controller.
If you are making your own cables & connectors refer carefully to both the panel & inverter specifications and the section
in this manual, “Connector, Pinouts & Jumpers” to ensure the correct pin to pin wiring.
PC SETTINGS
The controller has been designed to take a very wide range of input signals however to optimize the PC’s graphics performance
we recommend choosing 60Hz vertical refresh rate – this will not cause screen flicker.
OPERATION
Once the system has been connected and switched on there are a number of functions available to adjust the display
image as summarized in the following sections. The settings chosen will be saved for each mode independently.

Page 5
LCD DISPLAY SYSTEM SETTINGS
NOTE: By way of explanation the following refers to a set of sample buttons that may be obtained as an option. In addition
to power on/off and connection for backlight brightness the controller provides an On Screen Display of certain functions
which are controlled by 5 momentary type buttons (analog VR type) or 8 momentary type buttons (digital type):
Controls Analog VR type Digital type
On/Off – turns controller board power on VR toggle switch On/Off button
Brightness – controls backlight brightness Rotary VR Brightness +/- buttons
Menu – turns OSD menu On or Off (it will auto time
off)
Menu button Menu button
Select – Select function / Confirm SEL DN SEL DN
Move up to select individual RGB color level OSD
page
SEL UP SEL UP
+ – increase the setting / moves the selector to the
next function
+ +
- - decrease the setting / moves the selector to the
previous function
- -
OSD Functions
Brightness and Contrast
Brightness Increase/decrease brightness level.
Press – or + (- + )
Contrast Increase/decrease panel contrast level.
Press – or + (- + )
Backlight Increase/decrease inverter backlight level.
Press – or + (- + )
Exit Exit the OSD menu and save the settings
Color
Auto RGB Calibration Yes No
Color Temperature
Reset
Reset the color temperature to the default values
Y
es
N
o
Color Temperature 4(Adjust the warmness of the image displayed. The higher temperature the
coolest image looks like. The lower temperature the warmest image looks like.)
Adjust red color level
Press – or + (- +)
Adjust green color level
Press – or + (- +)
Adjust blue color level
Press – or + (- +)
Press SEL UP/DN button to select item
Set the color temperature to 4200K
Set the color temperature to 5000K
Set the color temperature to 6500K
Set the color temperature to 7500K
Set the color temperature to 9300K
Exit Exit the OSD menu and save the settings
ON/Off/Brightness
SEL UP
SEL DN
+
-
Menu
Analog VR type
Digital type

Page 6
Position
Autosetup Auto adjust the positions, phase, frequency
Yes No
Frequency Adjust the image horizontal size
Phase Fine tune the data sampling position (adjust image quality)
Image Horizontal
Position
Use +/- to move the image horizontally
Press – or + (- + )
Image Vertical Position Use +/- to move the image vertically
Press – or + (- + )
Exit Exit the OSD menu
Utilities
OSD setting 4
OSD Timeout : 3 / 6 / 10 / 15 / 18 / 25 / 30 seconds
Press – or + (- + )
OSD menu horizontal position
Press – or + (- + )
OSD menu vertical position
Press – or + (- + )
Load Factory Default Initialize the setting stored in non-volatile memory
Sharpness Adjust sharpness level
Press – or + (- + )
Exit Exit the OSD menu
Exit the OSD menu
Items marked 4have sub menus.
Exit the OSD menu to save the setting chosen

Page 7
CONNECTORS, PINOUTS & JUMPERS
The various connectors are:
Summary: Connectors
Ref Purpose Description
CN5 LVDS panel signal Hirose 20-pin, DF14-20P-1.25H
CN6 LVDS panel signal Hirose 25-pin, DF14-25P-1.25H
CN6A LVDS panel signal Hirose 20-pin, DF14-20P-1.25H
CN8 Serial control JST 6-way, B6B-XH-A (Matching type : XHP-6)
CNA1 Auxiliary power output JST 4-way, B4B-XH-A (Mating type : XHP-4)
CNB1 Backlight inverter JST 5-way, B5B-XH-A (Mating type : XHP-5)
CNC1 Function controls JST 12-way, B12B-XH-A (Mating type : XHP-12)
JA5 External panel power input JST 3-way, B3B-XH-A (Matching type : XHP-3)
LED1 Dual color LED connector Header pin 3x1
P1 VGA analog input DB15-way DDC version (blue colour)
PP1 DC power in DC power jack, 2.5mm contact pin diameter positive
PP2/PP3 DC power in (Alternate) DC power Molex 2 pin 0.156” pitch

Page 8
Summary: Jumpers setting
Ref Purpose Note
JA1 On board +5V logic power enable 1-3 & 2-4 closed, factory set, do not remove
JA3 Panel power voltage select 1-3 & 2-4 = +3.3V panel voltage supply
3-5 & 4-6 = +5V panel voltage supply
CAUTION: Incorrect setting will cause panel damage
JA4 LVDS power select
(Use for connection with LVDS panel only)
1-3 & 2-4 = +12V LVDS power (The voltage depends on
JA5 setting)
3-5 & 4-6 = +3.3V / +5V (The voltage depends on JA3
setting)
JA5 +12V Panel power voltage select Open = Disable +12V panel power
1-2 = +12V safe panel power on CN3 pin 3
2-3 = External panel power input
CAUTION: Incorrect setting will cause panel damage
JB2 Backlight inverter on/off control – signal level 1-2 = On/Off control signal ‘High’ = +12V
2-3 = On/Off control signal ‘High’ = +5V
Open = On/Off control signal ‘High’ = Open collector
CAUTION: Incorrect setting can damage inverter.
JB3 Backlight inverter on/off control – polarity 1-2 = control signal ‘high’ = CCFT ON
2-3 = control signal ‘low’ = CCFT ON
JP2 Backlight control type selection 1-2 = VR/Digital switch mount control
3-4 = Inverter backlight control by OSD menu.
5-6 = PWM inverter backlight control
JP3 Reserved for internal use Factory set to 1-3 & 2-4
JP6 Input power control Short = External switch control
Open = Switch mount control
JP7 Reserved Reserved for internal use
S1 Panel selection See table below
S1: Panel and function selection
Pos. # Function Description
1-6 Panel selection Refer to table 1 – Panel selection
7 Panel pixel format OFF : Single Pixel
ON : Double Pixel
8 LVDS data mapping select
(Refer to Table 2)
Mapping A : OFF
Mapping B : ON
9 Reserved Reserved for future use
10 Inverter backlight control by OSD
menu – Brightness Increase/Decrease
switch
Normal : ON
Reverse : OFF
Table 1 - Panel selection
S1-Pos.#1 S1-Pos.#2 S1-Pos.#3 S1-Pos.#4 S1-Pos.#5 S1-Pos.#6 Description
ON ON ON ON ON ON VGA (AU)*
ON ON ON ON OFF ON SVGA (AU, Unipac)
ON OFF ON ON OFF ON SVGA (Sharp)**
OFF ON ON ON OFF ON SVGA (Samsung)**
ON ON ON ON ON OFF XGA (Fujitsu, LG, Samsung, Sharp)
OFF ON ON ON ON OFF XGA (NEC)*
ON ON ON ON OFF OFF SXGA (Fujitsu, Sharp)
* The panel support apply on P/N 4169300-11 or up version.
** The panel support apply on P/N 4169300-12 or up version.
Table 2 – S1 Position 8 - LVDS data mapping select
Panel model support for mapping A Panels using LVDS board P/N 4162138-10, P/N
4162140-10, P/N 4162122-00
For example :
- LG LM150X06 XGA
- Samsung LTM150XH-L01 XGA
- Samsung LTM170E6-L04 SXGA
Panel model support for mapping B Panel using LVDS board P/N 4162150-00, P/N 4164702-
10, P/N 4162135-10
For example :
- Fujitsu FLC48SXC8V/10V SXGA
- Sharp LQ181E1LW31 SXGA
- Unipac UB084S01 SVGA
The most current list can be found the controller solution generator at http://www.digitalview.com/controllers/csg.php

Page 9
PINOUTS
CN5 – LVDS panel connector: HIROSE 20-pin, DF14-20P-1.25H
PIN SYMBOL DESCRIPTION
1 NC No connection
2 GND Ground
3 OUT03 Positive differential LVDS data 03
4 /OUT03 Negative differential LVDS data 03
5 GND Ground
6 CLKOUT0 Positive LVDS clock
7 /CLKOUT0 Negative LVDS clock
8 GND Ground
9 OUT02 Positive differential LVDS data 02
10 /OUT02 Negative differential LVDS data 02
11 GND Ground
12 OUT01 Positive differential LVDS data 01
13 /OUT01 Negative differential LVDS data 01
14 GND Ground
15 OUT00 Positive differential LVDS data 00
16 /OUT00 Negative differential LVDS data 00
17 GND Ground
18 GND Ground
19 VLCD Panel power supply
20 VLCD Panel power supply
CN6 – LVDS panel connector: HIROSE 25-pin, DF14-25P-1.25H
PIN SYMBOL DESCRIPTION
1 VLCD Panel power supply
2 VLCD Panel power supply
3 VLCD Panel power supply
4 GND Ground
5 GND Ground
6 GND Ground
7 GND Ground
8 OUTE03 Positive differential LVDS even data bit 03
9 /OUTE03 Negative differential LVDS even data bit 03
10 GND Ground
11 CLKOUTE Positive even LVDS clock
12 /CLKOUTE Negative even LVDS clock
13 GND Ground
14 OUTE02 Positive differential LVDS even data bit 02
15 /OUTE02 Negative differential LVDS even data bit 02
16 GND Ground
17 OUTE01 Positive differential LVDS even data bit 01
18 /OUTE01 Negative differential LVDS even data bit 01
19 GND Ground
20 OUTE00 Positive differential LVDS even data bit 00
21 /OUTE00 Negative differential LVDS even data bit 00
22 GND Ground
23 GND Ground
24 NC No connection
25 NC No connection

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CN6A – LVDS panel connector: HIROSE 20-pin, DF14-20P-1.25H
PIN SYMBOL DESCRIPTION
1 NC No connection
2 GND Ground
3 OUTE03 Positive differential LVDS even data bit 03
4 /OUTE03 Negative differential LVDS even data bit 03
5 GND Ground
6 CLKOUTE Positive even LVDS clock
7 /CLKOUTE Negative even LVDS clock
8 GND Ground
9 OUTE02 Positive differential LVDS even data bit 02
10 /OUTE02 Negative differential LVDS even data bit 02
11 GND Ground
12 OUTE01 Positive differential LVDS even data bit 01
13 /OUTE01 Negative differential LVDS even data bit 01
14 GND Ground
15 OUTE00 Positive differential LVDS even data bit 00
16 /OUTE00 Negative differential LVDS even data bit 00
17 GND Ground
18 GND Ground
19 VLCD Panel power supply
20 VLCD Panel power supply
CN8 – Serial Control In, JST B6B-XH-A (Reserved for factory use)
PIN SYMBOL DESCRIPTION
1 SDATA Reserved
2 SCLK Reserved
3 Vcc +5V
4 TXD RS-232 Tx Data (for programming use)
5 GND Ground
7 RXD RS-232 Rx Data (for programming use)
CNA1 - Auxiliary power output, JST B4B-XH-A
PIN SYMBOL DESCRIPTION
1 AUX_12V +12V DC, 500mA max.
2 AUX_GND Ground
3 AUX_GND Ground
4 AUX_Vcc +5V DC, 500mA max
CNB1 - To backlight inverter, JST B5B-XH-A
PIN SYMBOL DESCRIPTION
1 GND Ground
2 VBKL Backlight power supply, +12VDC (switched)
3 BLCTRL Backlight On/Off control signal (refer to JB2 & JB3)
4 BVR_WIP Backlight brightness VR pin WIP
5 BVR_A Backlight brightness VR pin A
CNC1 – Control switch, JST B12B-XH-A
PIN SYMBOL DESCRIPTION
1 PSWIN Power button A
2 SW_ON Power button B
3 BVR_A Backlight Brightness VR pin A
4 BVR_WIP Backlight Brightness R pin WIP
5 BVR_B Backlight Brightness VR pin B (470 ohm resistor to +5V Vcc)
6 GND Ground
7 MENU OSD menu
8 -/LEFT OSD -/Left
9 +/RIGHT OSD +/Right
10 SEL_DN OSD Select down
11 SEL_UP OSD Select up
12 NC No connection
JA5 - Auxiliary power output, JST B4B-XH-A
PIN SYMBOL DESCRIPTION
1 PANEL_PWR_12V Internal +12V panel power
2 PANEL_PWR_External Panel power (12V~18 V use external power input cable)
3 GND Ground (External power ground)

Page 11
LED1 – Status LED connector: 3-pin header
PIN DESCRIPTION
1 Green LED pin (anode)
2 LED pin common (cathode)
3 Red LED pin (anode)
P1 - ANALOG VGA INPUT - 15 way connector
PIN SYMBOL DESCRIPTION
1 PCR Red, analog
2 PCG Green, analog
3 PCB Blue analog
4 ID2 Reserved for monitor ID bit 2 (grounded)
5 AGND Analog ground
6 AGND Analog ground red
7 AGND Analog ground green
8 AGND Analog ground blue
9 DDC_5V +5V power supply for DDC (optional)
10 AGND Analog ground
11 ID0 Reserved for monitor ID bit 0 (grounded)
12 DDC_SDA DDC serial data
13 CS/HS_IN Horizontal sync input
14 VS_IN Vertical sync, input
15 DDC_SCL DDC serial clock
PP1 - 12VDC power supply - input
PIN DESCRIPTION
1 +12VDC in center pin
2 Ground
PP2/3 – Alternate 12VDC power supply - input
PIN DESCRIPTION
1 +12VDC
2 Ground

Page 12
CONTROLLER DIMENSIONS
The maximum thickness of the controller is 16 mm (measured from bottom of PCB to top of components, including
any underside components & leads). We recommend clearances of:
•5mm from bottom of PCB - if mounting on a metal plate we also recommend a layer of suitable insulation
material is added to the mounting plate surface.
•10mm above the components
•3~5mm around the edges
Any of the holes shown above can be used for mounting the PCB, they are 3.2mm in diameter. Other holes are used
for mounting inverters supplied as fitted options.
CAUTION: Ensure adequate insulation is provided for all areas of the PCB with special attention to high
voltage parts such as the inverter.

Page 13
APPLICATION NOTES
USING THE CONTROLLER WITHOUT SWITCHES ATTACHED
This is very straightforward:
With controls attached and display system active make any settings for colour and image position as required then switch
everything off.
Remove the control switches, the 12 way (CNC1) cables.
Use a jumper or similar to connect pins 1 & 2 on CNC1, this will fix the board On.
Refer to inverter specifications for details as to fixing brightness to a desired level, this may require a resistor, an open
circuit or closed circuit depending on inverter.
Summary: On CNC1 the only functions that are used are for On/Off and Brightness (if controller mounted inverter is used). On
CNC1 the pins are for momentary buttons so it doesn’t matter that no buttons are attached.
INVERTER CONNECTION
There are potentially 3 issues to consider with inverter connection:
1. Power
2. Enable
3. Brightness
Please read the following sections for a guide to these issues.
Inverter Power: As per the table for CNB1 pin 1 is ground and pin 2 provides 12V DC. This should be matched with the
inverter specification: see table.
CNB1
PIN DESCRIPTION
1 ground
2 +12VDC
Enable: This is a pin provided on some inverters for On/Off function and is used by this panel controller for VESA DPMS
compliance. If the inverter does not have an enable pin or the enable pin is not used then DPMS will not be
operational. Pin 3 should be matched to the inverters specification for the ‘enable’ or ‘disable’ pin.
CNB1
PIN DESCRIPTION
3 enable
Further, jumpers JB2 & JB3 should be set to match the inverters specification for the enable pin power and High or Low
setting: see table.
Ref Purpose Note
JB2 inverter enable voltage 1-2 H=12V, 2-3 H=5V (Vcc), OPEN H=open collector
JB3 inverter control 1-2 H=On, 2-3 L=On
Brightness: There are various methods for brightness control and it is important to consider the specifications for the inverter
to be used. Generally the situation is:
1. Brightness can controlled by using a VR.
2. Brightness controlled adding a circuit such as PWM (Pulse Width Modulation).
3. No adjustment of brightness is possible.
CNB1 pins 4 & 5 are available for connecting to an inverter or circuit where VR control is supported.
CNB1
PIN DESCRIPTION
4 VR WIP
5 VR A
This can then be matched with function controls connected to CNB1 pins 3 & 4: see table.
CNB1
PIN DESCRIPTION
3 VR A
4 VR WIP

Page 14
TROUBLESHOOTING
General
A general guide to troubleshooting a flat panel display system it is worth considering the system as separate elements, such as:
Controller (jumpers, PC settings)
Panel (controller, cabling, connection, PC settings)
Backlight (inverter, cabling, backlight tubes)
Cabling
Computer system (display settings, operating system)
Through step by step cross checking with instruction manuals and a process of elimination to isolate the problem it is usually
possible to clearly identify the problem area.
No image:
If the panel backlight is not working it may still be possible to just see some image on the display.
A lack of image is most likely to be caused by incorrect connection, lack of power, failure to provide a signal or incorrect
graphic card settings.
Image position:
If it is impossible to position the image correctly, ie the image adjustment controls will not move the image far enough, then
test using another graphics card. This situation can occur with a custom graphics card that is not close to standard timings
or if something is in the graphics line that may be affecting the signal such as a signal splitter (please note that normally a
signal splitter will not have any bad effect).
Image appearance:
A faulty panel can have blank lines, failed sections, flickering or flashing display
Incorrect graphics card refresh rate, resolution or interlaced mode will probably cause the image to be the wrong size, to
scroll, flicker badly or possibly even no image.
Incorrect jumper settings on the controller may cause everything from total failure to incorrect image. CAUTION: Do not
set the panel power input incorrectly.
Sparkling on the display: faulty panel signal cable.
Backlight:
Items to check include: Power input, Controls, Inverter and Tubes generally in this order. If half the screen is dimmer than the
other half:
Check cabling for the inverter.
For a specific backlight tube check the AC pins orientation (CAUTION: never reverse any DC power pins).
Also:
If adjusting brightness control has no effect the chances are that the VR rating or method of adjusting brightness is not
compatible or correctly connected to the inverter.
If system does not power down when there is a loss of signal.
Continued failure:
If unit after unit keeps failing consider and investigate whether you are short circuiting the equipment or doing something
else seriously wrong.
Generally after common sense issues have been resolved we recommend step by step substitution of known working parts to
isolate the problem.

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SPECIFICATIONS
Panel compatibility 1280x1024, 1024 x 768, 800x600, 640x480 TFT LVDS LCD’s support.
No. of colours Up to 3 x 8 bit providing 16.7 million colours.
Vertical refresh rate SXGA resolution up to 60Hz, XGA resolution up to 75Hz, SVGA resolution
up to 75Hz. VGA resolution up to 75Hz
Dot clock (pixel clock) maximum 120 MHz
Graphics formats Standard SXGA, XGA,SVGA,VGA
Standard input at source VGA analog (15-pin) standard with automatic detection of :
Digital Separate Sync
Sync-On-Green
Composite Sync
Controls available - On/Off
- Brightness (inverter)
- OSD menu,
- OSD select
- OSD setting +
- OSD setting -
Control interface - Buttons
Settings memory Settings are stored in non volatile memory
Language OSD support Graphics OSD icons
VESA DPMS implementation Yes
Plug & Play VESA DDC 1, 2/b compatible
Voltage output for LCD +3.3V , +5V, +12V, +12~+18V (External voltage supply)
Input voltage 12VDC
Controller power consumption Approx 4W (controller logic only, no panel and inverter are involved)
Controller dimensions 107mm x 92mm x 21mm
Storage temperature limits -40oC to +70oC
Operating temperature limits 0oC to +65oC
NOTES
Please note the following:
•For specific panel setup a sample of an LCD may be required (this will be returned) and a copy of the full technical
specifications for the panel from the manufacturer.
•Relayout and custom development services are available.

Page 16
Graphic Mode Support Table
Mode Resolution Clk [MHz] Horizontal
freq [KHz]
Vertical
freq [Hz]
Sync Mode
E1_70 640x350
70Hz
25.175 31.469 70.087 Digital Separate Sync
E2_70 640x400
70Hz
25.175 31.469 70.087 Digital Separate Sync
T_70 720x400
70Hz
28.322 31.469 70.087 Digital Separate Sync
T_70 720x400
70Hz
28.322 31.469 70.087 Sync On Green
V_60 640x480
60Hz
25.175 31.469 59.940 Digital Separate Sync
V_60 640x480
60Hz
25.175 31.469 59.940 Sync On Green
V_60 640x480
60Hz
25.175 31.469 59.940 Composite Sync
V_72 640x480
72Hz
31.500 37.861 72.809 Digital Separate Sync
V_72 640x480
72Hz
31.500 37.861 72.809 Sync On Green
V_72 640x480
72Hz
31.500 37.861 72.809 Composite Sync
V_75 640x480
75Hz
31.500 37.500 75.000 Digital Separate Sync
V_75 640x480
75Hz
31.500 37.500 75.000 Sync On Green
V_75 640x480
75Hz
31.500 37.500 75.000 Composite Sync
SV_56 800x600
56Hz
36.000 35.156 56.250 Digital Separate Sync
SV_56 800x600
56Hz
36.000 35.156 56.250 Sync On Green
SV_56 800x600
56Hz
36.000 35.156 56.250 Composite Sync
SV_60 800x600
60Hz
40.000 37.879 60.317 Digital Separate Sync
SV_60 800x600
60Hz
40.000 37.879 60.317 Sync On Green
SV_60 800x600
60Hz
40.000 37.879 60.317 Composite Sync
SV_72 800x600
72Hz
50.000 48.077 72.188 Digital Separate Sync
SV_72 800x600
72Hz
50.000 48.077 72.188 Sync On Green
SV_72 800x600
72Hz
50.000 48.077 72.188 Composite Sync
SV_75 800x600
75Hz
49.500 46.875 75.000 Digital Separate Sync
SV_75 800x600
75Hz
49.500 46.875 75.000 Sync On Green
SV_75 800x600
75Hz
49.500 46.875 75.000 Composite Sync
X_60 1024x768
60Hz
65.000 48.363 60.004 Digital Separate Sync
X_60 1024x768
60Hz
65.000 48.363 60.004 Sync On Green

Page 17
X_60 1024x768
60Hz
65.000 48.363 60.004 Composite Sync
X_70 1024x768
70Hz
75.000 56.476 70.069 Digital Separate Sync
X_70 1024x768
70Hz
75.000 56.476 70.069 Sync On Green
X_70 1024x768
70Hz
75.000 56.476 70.069 Composite Sync
X_75 1024x768
75Hz
78.750 60.023 75.029 Digital Separate Sync
X_75 1024x768
75Hz
78.750 60.023 75.029 Sync On Green
X_75 1024x768
75Hz
78.750 60.023 75.029 Composite Sync
SX_60 1280x1024
60Hz
108 63.81 60.020 Digital Separate Sync
SX_60 1280x1024
60Hz
108 63.81 60.020 Sync On Green
SX_60 1280x1024
60Hz
108 63.81 60.020 Composite Sync
Remark :
The controller has been designed to take a very wide range of input signals however to optimize the PC’s graphics
performance we recommend choosing 60Hz vertical refresh rate. To support on higher refresh rate over 60Hz, the
LCD panel may not support.

Page 18
WARRANTY
The products are warranted against defects in workmanship and material for a period of one (1) year from the date of purchase
provided no modifications are made to it and it is operated under normal conditions and in compliance with the instruction
manual.
The warranty does not apply to:
•Product that has been installed incorrectly, this specifically includes but is not limited to cases where electrical short circuit
is caused.
•Product that has been altered or repaired except by the manufacturer (or with the manufacturer’s consent).
•Product that has subjected to misuse, accidents, abuse, negligence or unusual stress whether physical or electrical.
•Ordinary wear and tear.
Except for the above express warranties, the manufacturer disclaims all warranties on products furnished hereunder, including
all implied warranties of merchantability and fitness for a particular application or purpose. The stated express warranties are in
lieu of all obligations or liabilities on the part of the manufacturer for damages, including but not limited to special, indirect
consequential damages arising out of or in connection with the use of or performance of the products.
CAUTION
Whilst care has been taken to provide as much detail as possible for use of this product these instructions cannot be
relied upon as an exhaustive source of information. This product is for use by suitably qualified persons who
understand the nature of the work they are doing and are able to take suitable precautions and design and produce a
product that is safe and meets regulatory requirements.
LIMITATION OF LIABILITY
The manufacturer’s liability for damages to customer or others resulting from the use of any product supplied hereunder shall in
no event exceed the purchase price of said product.
TRADEMARKS
The following are trademarks of Digital View Ltd:
• Digital View
• AL-1280
CONTACT DETAILS
Digital View has offices in Asia, Europe and USA also an internet site:
ASIA
Digital View Ltd
19 th Floor, Tai Tung Building
8 Fleming Road, Wanchai
Hong Kong
Kwun Tong, Kowloon, Hong Kong
Tel: [phone] Fax: [phone]
Sales: [email protected]
EUROPE
Digital View Ltd
36 Mortimer Street
London W1W 7RG
UK
Tel: (44) (0)20 7631 2150 Fax: (44) (0) 20 7436 1299
Sales: [email protected]
USA
Digital View Inc.
18440 Technology Drive, Building 130
Morgan Hill, California, 95037
USA
Tel: [phone] Fax: [phone]
Sales: [email protected]
WEBSITE
www.digitalview.com
Specifications subject to change without notice
Sixth Issue: 1 July, 2005 (AL-1280.doc) © Digital View Ltd 2004, 2005