LedSync820C
LED Video Processor
USER’S MANUAL
LedSync820C User’s Manual
TABLE OF CONTENTS
I. Safety precautions ----------------------------------------------------------------- 3
II. Connections of hardware
1.Rear view ------------------------------------------------------------ 4
2. Port description --------------------------------------------------------------------- 4
3. Connectivity Diagram of hardware------------------------------------------ 6
III. Frontal panel operations
1. Diagram of frontal panel---------------------------------------------------------- 7
2. Button operations -------------------------------------------------------- 7
3. Software control--------------------------------------------------------------------- 8
IV. Output image setup
1. LedSync820C output image----------------------------------------------------- 9
2. Setup LedSync820C output image ------------------------------------------ 10
V. Troubleshooting ------------------------------------------------------------------ 12
VI. Specifications----------------------------------------------------------------------- 15
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LedSync820C User’s Manual
I. Safety Precautions
Danger!
There is high voltage in the processor, to prevent any unexpected
hazard, unless you are a maintenance, please do not open the cover of the
device.
Warning!
1. This device shall not encounter water sprinkle or splash, please do not
place anything containing water on this device.
2. To prevent fire, keep this device far from any fire source.
3. To keep good ventilation, there shall be at least 20cm interval between
frontal and rear panel of the device.
4. If this device gives out any strange noise, smoke or smell, please
immediately unplug the power cord from receptacle, and contact local
dealer.
5. Please do not plug or unplug DVI signal cable when the device
on power.
Caution!
1. Please thoroughly read this manual before using this device, and keep
it well for future reference.
2. In the event of lighting or when you are not going to use the device for
a long time, please pull the power plug out of receptacle.
3. Nobody other than professional technicians can operate the device,
unless they have been appropriately trained or under guidance of
technicians.
4. To prevent equipment damage or electric shock, please don’t fill in
anything in the vent of the device.
5. Do not place the device near any water source or anywhere damp.
6. Do not place the device near any radiator or anywhere under high
temperature.
7. To prevent rupture or damage of power cords, please handle and keep
them properly.
8. Please immediately unplug power cord and have the device repaired,
when
1) Liquid splashes to the device.
2) The device is dropped down or cabinet is damaged.
3) Obvious malpractice is found or performance degrades.
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LedSync820C User’s Manual
II. Connections of hardware
1. Rear view
Figure 1
2. Port description
1) Video input (INPUT column)
LedSync820C supports 8-channel signal input, including:
Port name
Description
4-channel PAL/NTSC system composite
V1~V4
video input
1-channel PAL/NTSC system S_Video input
Y/C (S_Video)
1-channel computer analog signal input
VGA
1-channel computer digital signal input
DVI
1-channel high-definition component signal
YPbPr
input
2) Audio input
Corresponding to 8-channel video input signal, LedSync820C
supports 8-channel stereo audio signal input
3) Video signal output
Port name Description
VGA OUT 1-channel analog RGBHV signal output, it can be
connected to a local display device and used as
monitor (it is strongly recommended to use this
port when operating and setting LedSync820C).
DVI OUT 1-channel digital DVI signal output, it is to be
connected with external LED transmission card or
LED transmission box
4) Audio signal output
It corresponds to the selected video input signal, and output
this channel audio input signals.
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5) Signals of other ports
Port name
Description
RS232 IN
Serial communication port, LedSync820C’s
Timing Control Software running on Upper
Controller can operate and control LedSync820C
via this communication port.
3. Connectivity Diagram of hardware:
Figure 2
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LedSync820C User’s Manual
III. Frontal panel operations
1. Diagram of frontal panel
Figure 3
2、 Button operations:
LedSync820C have 14 buttons on frontal panel, after start-up all
these buttons are in operation mode. Their functions are described as
below:
1) Select input video source
Button names Description
Switch to V1~V4, composite video input
V1~V4
Y/C (S_Video) Switch to S-Video input
Switch to computer analog signa input
VGA
Note: to get clarity computer image, you can click
the “VGA” button 6 times continuously, and then
you can click “VGA” button again and again to
change the computer image sampling phase,
when the computer image be displayed most
clearly, the adjustment is ok.
Switch to computer digital signal input
DVI
Switch to high-definition component video signal
YPbPr
input
Note: to get clarity HDTV image, you can click the
“YPbPr” button 6 times continuously, and then you
can click “YPbPr” button again and again to
change the HDTV image sampling phase, when
the HDTV image be displayed most clearly, the
adjustment is ok.
Switch audio input while operating above buttons, select the audio
signal input from corresponding video input to output it through Audio
OUT.
Notes: when user has selected input signal, if there are signal input
in corresponding signal input ports and are in LedSync820C formats,
the indicator above corresponding button will be illumed. However,
when there are no signal input in corresponding input ports, the
indicator above corresponding button will blink, and dark screen will be
displayed on the screen.
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2) Select output brightness
Button names Description
Decrease
output
BRT LedSync820C
Increase
output
BRT +
LedSync820C
image
brightness
of
image
brightness
of
LedSync820C supports 8 levels Brightness, “1” represents the
lowest brightness, 8 represents the highest brightness. When
brightness is adjusted to be “1”, ”3”, ”5” or “7”, their LED indicators
will blink; When brightness is adjusted to be “1”, ”3”, ”5” or “7”, their
LED indicators will keep illumed.
3) Select image status
Button names Description
Select user-defined image parameters, including
DEF
GAMMA value, Video Chrom and Hue. User can
define custom parameters using PC software.
Select a standard image status to output image.
STD
This standard image has been preset at factory,
including GAMMA =1, Video Chrom and Video
Hue = standard values. User can’t modify these
standard values.
4) Select FULL/PART display (FULL, PART)
Button names Description
FULL means that LED will display a full picture.
FULL
PART means that LED only display a part of a
PART
picture.
3、 Software Control:
LedSync820C is supplied with Timing Control software
, user can operate and control LedSync820C using this
software, including:
z Switch input signal source, change brightness of output
images.
z Manually operate and control it or edit operation and control
schedule to make it executed automatically.
z Carry out site control, or remote control over LAN or WAN.
For details please refer to LedSync82xx Timer.
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IV. Setup of output image
The following setps must be made by relevant qualified
technicians. For ordinary users, unless they have received adequate
relevant training, they shall not attempt the following setup
operations!
1. LedSync820C output image
LedSync820C output images from VGA OUT and DVI OUT in
the format: 1024×768 pixels, with refresh frequency of 60Hz.
However, the resolution of LED screen is not exactly 1024×768
pixels. When the resolution of LED screen is less than 1024×768
pixels, we can set LedSync820C to output the images exactly fitting
the resolution of LED screen, so that the LED could display a full frame
of image. See the schematic diagram below:
(0, 0)
Hor_Str
Vert_Str
Hor_Width
LedSync820C Out Image Area
768
Vert_Height
LED Display Screen
LedSync820C Out Format = 1024×768
1024
Figure 4
As above figure shows: the size and location of LedSync820C
output images are defined by 4 groups of parameters:
Name
Description
Hor_Str
The horizontal start position of output image
Hor_Width
The horizontal width of output image
Vert_Str
The vertical start position of output image
Vert_Height
The vertical height of output image
The start coordinates (0, 0) of sync820C output image is defined in
the right top of 1024×768 pixels output area.
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2. Setup of LedSync820C output image
LedSync820C can setup its output image by operating the buttons
on frontal panel. After LedSync820C is started up, all buttons on frontal
panel are in operation mode. As above section III.2 describes, if you
press “STD” button for continuous 18 times, LedSync820C will enter
setup state, and all buttons on frontal panel are ready to be in setup
mode. See the table below for the definitions of each button:
Name
Description
Move output image leftward.
Hor_Str
Move output image rightward.
Decrease width of output image
Hor_Width
Increase width of output image
Move output image upward.
Vert_Str
Move output image downward.
Decrease height of output image
Vert_Height
Increase height of output image
Video_Color
+
Save
Setup
Step
Decrease video Standard color value=0. 16 represents the lowest
color
Increase video color, +16 represents the
highest color
color
Save currently adjusted values
Press the button for continuous 18 times,
LedSync820C will enter setup state, press
it again, LedSync820C will exit setup state
and enter operation state.
Select step value 1 or 10
Notes:
a) Generally Hor_Str≥0. If you need modify it, the value of
Hor_Str can be setup to be – 8 ;
b) Generally Vert_Str≥0. If you need modify it, the value of
Vert_Str can be setup to be – 5 ;
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c) Generally, the start coordinates of output image (Hor_Str ,
Vert_Str ) should be identical to the start coordinates of the
input image that LED transmission card captured;
d) The resolution of output image can be adjusted to the lowest 8
×8 pixels;
e) The output image shall not exceed the output area of 1024×
768 pixels;
f) While the current video image of LedSync820C is valid image,
the video color can be adjusted;
g) The custom video color is only accessible by pressing
“DEF“ button while in operation mode;
h) If there are no valid input signals in LedSync820C, when it
enters setup mode, a green screen will be generated as
reference image;
i) It is strongly recommended to connect a VGA monitor to VGA
OUT of LedSync820C, so as to intuitively display all above
adjustment and setups.
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LedSync820C User’s Manual
V. Troubleshooting
1、 Dark screen, no image on LED
Check the input source of LedSync820C for any abnormality. If the
indicator above input signal button is illumed, it means the input
source is in good condition; however, if the indicator blinks, it means
some fault has occurred.
If the input source is normal, the indicator will keep illumed.
Press “PART“ button on frontal panel of LedSync820C. While
in PART mode, LED will display image; however, while in
FULL mode, LED will display dark screen; the moment
please check whether the start coordinates of
LedSync820C output image is identical to the start
coordinates of the input image that LED transmission card
captured.
No image display even in PART mode, connect 1 VGA
monitor to VGA OUT of LedSync820C, check whether there
are images appearing on VGA monitor.
If there are images on VGA monitor,please check:
The DVI connection between DVI output of
LedSync820C and DVI input of LED transmission card
Each section of Ethernet cable connection between
LED transmission card and LED screen. The signal
has been weakened a lot and imposed high risk of
interference
from
outside
after
long-term
transmission passing many sections of Ethernet
cable. Please adopt high-quality Ethernet cable and
RJ45 connector, and shorten the Ethernet cable to
the most extent.
Hot swap of DVI cable may result in burning of DVI
drive or receiving chips.
If there are no images on VGA monitor, please have
supplier repair it
If the input source is abnormal, the indicator will keep blink.
If current input source is: DVI
First, check DVI connection cable
Actuate DVI output of PC graphic display card
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LedSync820C User’s Manual
Set the output resolution any of the following
800×600
1024×768
1280×1024
Note that DVI output refresh frequency (Vertical Scanning
Frequency) must be: 60Hz
If DVI indicator of LedSync820C frontal panel still blinks,
please have supplier repair it.
If current input source is: VGA
First, check VGA connection cable
Actuate VGA output of PC graphic display card
Set the output definition any of the following
800×600
1024×768
1280×1024
Note that VGA output refresh frequency (Vertical Scanning
Frequency) must be: 60Hz
If VGA indicator of LedSync820C frontal panel still blinks,
please have supplier repair it.
If current input source is: YPbPr
First, check YPbPr cable, the three cables Y, Pb, Pr are
connected to corresponding input jacks of LedSync820C
respectively.
Make sure YPbPr signal is in any of the following formats:
720p@60Hz
1080i@60Hz
If the YPbPr indicator on frontal panel of LedSync820C
still blinks, please have supplier repair it.
If current input source is: Y/C(S_Video)
Check S_Video cable.
Make sure S_Video output of DVD player has been
actuated (some DVD players might have disabled S_Video
output, it must be reset and actuated).
If Y/C indicator on frontal panel of LedSync820C still blinks,
please have supplier repair it
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LedSync820C User’s Manual
2、 Timing Control software
can’t control LedSync820C
1) Make sure RS232 cable supplied with the machine is
properly connected, one end connects COM port of PC, the
other end connects RS232 IN of LedSync820C;
2) Identify the No. of the PC’s COM port to be connected, e.g.
COM1 or COM2, select appropriate COM port on
control software;
3) Select appropriate COM port, and ensure this COM port
not yet occupied by other applications, e.g. the common
LedStudio software;
4) If after the above steps LedSync820C still can’t be
controlled, please have supplier repair it.
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LedSync820C User’s Manual
VI. Specifications
Inputs
Nums/Type
1×RGBHV(VGA)
1×DVI
1×YPbPr(HDTV)
4×CVBS
1×Y/C(S-Video)
Video system
PAL/NTSC
CVBS Scope/Impedance 1V (p_p) / 75Ω
Y/C Scope/Impedance
Y: 0.7V (p_p) / 75Ω,
C: 0.35V (p_p) / 75Ω
RGB/DVI resolution
1280×1024@60Hz, 1024×768@60Hz ,
800×600@60Hz
RGB Scope/Impedance 0.7 V (p_p) / 75Ω
YPbPr (HDTV) System
1280×720p@60Hz, 1920×1080i@60Hz
YPbPr (HDTV)
Y: -0.3V ~ +0.7V (p_p) / 75Ω
Scope/Impedance
Pb: -0.35V ~ +0.35V (p_p) / 75Ω
Pr: -0.35V ~ +0.35V (p_p) / 75Ω
Connectors
RGBHV: 15pin D_Sub(female)
DVI: 24+1 DVI_D
YPbPr(HDTV): RCA×3
CVBS: RCA
Y/C: 4pin mini DIN(female)
Outputs
Nums/Type
1×RGBHV
1×DVI
RGB/DVI resolution
1024×768@60Hz
RGB Scope/Impedance 0.7 V (p_p) / 75Ω
Connectors
RGBHV: 15pin D_Sub(female)
DVI: 24+1 DVI_D
Others
Control
RS 232. Panel Button
Power
100-240VAC 60W 50/60Hz
5-40 ℃
Operating Temp
15-85%
Humidity
Size
155 mm (high) ×350mm (wide) ×
485mm (length)
5.6 Kg
Weight
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