Wooyoung Telecom U90W Service manual

User’s Reference
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U90W
FCC STATEMENT
This equipment has been tested and found to comply with the limits for a Class B digital
device pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates
uses and can radiate radio frequency energy and if not installed and used in accordance with
the instructions may cause harmful interference to radio communications. However there is
no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception with can be determined by turning
the equipment off and on the user is encouraged to try to correct the interference by one
more of the following measures :
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
-Consult the dealer or an experienced radio/TV technician for help.
-Only shielded interface cable should be used.
Finally any changes or modifications to the equipment by the user not expressly approved by
the grantee or manufacturer could void the users authority to operate such equipment.

21
Precautions
1
AC outlet
Power cord
Warning : The following information will help you avoid the risk of electric shock, serious injury, and death.
Plug the power cord into a
properly grounded outlet.
There is the risk of electric
shock.
Do not unplug from the outlet
y pulling the power cord or
when your hands are wet.
There is the risk of electric
shock and fire.
Do not allow any o ject or liq-
uid to enter inside the monitor.
There is the risk of electric
shock, fire, or damage to the
monitor.
Do not end the power cord
excessively or place heavy o jects
on it. Keep children and pets away
from the power cord as they may
damage the power cord. There is
the risk of electric shock and fire.
Do not use a damaged power
cord or plug. Make sure the
plug fits snugly into the outlet.
There is the risk of electric
shock or fire.
Do not expose the monitor to
the direct sun light.
Keep the monitor away from high
temperature, humidity, and dust.
■Operating environment
=0~35degrees Celsius
■Operating environment
=30~80relative humidity.
Do not lock the fan louvers.
There is the risk of fire or dam-
age to the monitor.
220V
Use a proper voltage/current
level indicated
Do not clean the LCD with
a rasive chemicals.
There is the risk of damage to
the LCD.
Do not scratch and damage
the LCD with sharp o jects.
Keep the monitor away from
o jects and electrical appli-
ances that may generate elec-
tromagnetic fields.
Place the monitor on a flat, sta-
le surface. The monitor may
fall and there is the risk of
damage or injury
Unplug the power cord when
the monitor is not in use for a
prolonged period of time.
If you hear a noise or smell
smoke from the computer or
adaptor, unplug the power cord
immediately, and call the service
center. There is the risk of elec-
tric shock or fire.
Do not overload an electrical
outlet with too many devices.
There is the risk of fire.
Do not attempt to disassem le,
fix, or modify the monitor.
There is the risk of electric
shock or fire.
Caution : The following information will help you avoid the risk of minor or moderate injury, or damage to the monitor.

43
Items
2
Please make sure the following items are included with your monitor.
If any items are missing, contact your dealer.
Also we’d like to ask you to use our ‘D-Su ’ ca le all the time, otherwise we are not in a
position to e responsi le for all the matters caused y that.
Notice
When the condition of the screen is not good, please press the utton " AUTO".
(This function may cause some noises on the screen according to VGA Cards)
Notice
Setting up the LCD monitor
Power
PC
DVI (Option)
SPK IN
SPK OUT
Power Cord
15-pin D-Su Signal Ca le
DVI-D Ca le*1
Audio Ca le*2
External Speaker Ca le*2
No. Ca le connectionsName
All LCD monitors need time to ecome thermally sta le whenever you turn on the
monitor after letting the monitor e turned off for a couple of hours. Therefore, to
achieve more accurate adjustments for parameters, allow the LCD monitor to e
warmed up for at least 30 minutes efore making any screen adjustments.
Warm-up Time
The adoption of the new VESA Plug and Play solution eliminates complicated and time
consuming setup. It allows you to install your monitor in a Plug and Play compati le sys-
tem without the usual hassles and confusion. Your PC system can easily identify and
configure itself for use with your display. This monitor automatically tells the PC system
its Extended Display Identification Data (EDID) using Display Data Channel (DDC) pro-
tocols so the PC system can automatically configure itself to use the flat panel display.
Plug & Play
*1 : For DVI Model Only. *2 : For Audio Model Only.
*1 : For DVI Model Only.
*2 : For Audio Model Only.
*2*1
1
2
3
4
5
LCD Monitor
Power Cord
24pin DVI Ca le Audio Ca le
15-pin D-Su Ca le User Manual
Stand ※
Push the hook until
hanging
Kensington Security Slot
: This monitor offers you the opportunity to secure your monitor using a Kensington-type secu-
rity device. Kensington lock is not included. Refer to your locking device documentation for
installation instructions.
(Kensington-type security slot location is on the ack of the monitor.)

65
How to use the Function Key
3
Adjusting The Monitor
4
●BRIGHTNESS : Changes the overall light intensity of the images eing displayed.
●CONTRAST :
Changes the ratio of light intensity etween the rightest white and darkest lack.
●GAMMA : Ajusting Gamma.
(This can e changed only at normal mode on the fuction of MWE)
Adjusting brightness
Adjusting colors
Color adjustment needs to be only or Analog mode.
●COLOR TEMP : There are user, luish and reddish modes.
In case user has to set up "RED","GREEN","BLUE" in person, please select
user mode.
●RED,GREEN,BLUE : You can adjust red,green and lue values that you want.
Adjusting the horizontal & vertical
●H POSITION : Moves to the Left/Right
*1
●V POSITION : Moves to the Top/Bottom
*1
●PHASE : When image is not clear, you can use clock/phase menu.
*1
●CLOCK : When image is not clear, you can use clock/phase menu.
*1
*1 : For Analog Mode Only.
Adjusting OSD
●LANGUAGE : Select language in OSD menu.
●OSD H POSI : Moves the OSD menu to the horizontal direction.
●OSD V POSI : Moves the OSD menu to the vertical direction.
●OSD TIMER : Shows the OSD TIME displays from 5 to 60sec.
MENU
SEL/AUTO
/MWE
/VOL
1. First click : The OSD main menu appears.
2. Second click : The OSD menu disappears.
HL900WS / HL900WD
HL900WAS / HL900WAD
Select Key : Select a command function.
Auto Key : This will optimize image quality automatically.
*1
Up Key :
1. Move the on-screen highlighted comand item to the previous one.
2. Increase the current option value.
VOL Key : You can adjust the volume.
*2
Down Key :
1. Move the on-screen highlighted comand item to the next one.
2. Decrease the current option value.
MWE Key : You can manually adjust the screen to your environ-
ment on the computer.
Power On/Off toggle utton.
*1 : For Analog Mode Only. *2 : For Audio Model Only.
Most of the graphic cards are OK, ut some of them are not compati le with the
monitor once in a while, which causes some noises on the screen. In this case,
you can select "Auto Adjust" to solve this matter immediately.
Notice

7 8
Appendix
5
Display Modes and requency
This monitor has a uilt-in power management system called PowerSave. This system
saves energy y switching your monitor into a low-power mode when it has not een
used for a certain amount of time. The monitor automatically returns to normalopera-
tion when you press a key on the key oard. For energy conservation, turn your
monitor OFF when it is not needed, or when leaving it unattended for long periods.
Power Save
Adjusting others
●BRIGHTQUEST : You can select the function of MWE on the OSD menu.
●ANALOG : You can change Analog mode manually.
(If you didn’t select any mode, it will go ack to the original mode.)
●DIGITAL : You can change Digital mode manually.
(If you didn’t select any mode, it will go ack to the original mode.)
●RECALL : Discards current setting and replaced all parameters with the factory default values.
●AUTO COLOR : Automatic adjust color(white level) for various input sources white level.
Adjusting MWE (Media Windows Enhancement)
This is the unction adjusting its colors and brightness that are suitable or the
user’s system.
When you press MWE button, you can get into the ollowing picture.
●TEXT : Documents
●INTERNET : Internet
●ENTERTAIN : Movies , Video games.
●NORMAL : Normal
The first set-up was done when the goods are released from the factory. After fin-
ishing the first set-up, Please press Auto and optimize the screen.
Notice
Mode Resolution
Horizontal
Frequency(KHz)
Vertical
Frequency(Hz)
Pixel Clock
Frequency(MHz)
Sync
Polarity(H/V)
ON
OFF
Under 40W
Less than 2W
-
Within2 sec
Blue
Flickering (Blue)
State Power
consumption
Recovery
Time LED Color

9
Troubleshooting
What you see
Ensure that the power cord is firmly connected and the LCD
monitor is on.
“VIDEO MODE NOT
SUPPORTED” message
“NO SIGNAL” message
Screen is lank and power indictor
is off
�Check the maximum resolution and the frequency of the
video adaptor.
�Compare these values with the data in the Display Modes
Timing Chart.
�Ensure that the signal ca le is firmly connected to the PC
or video sources.
�Ensure that the PC or video sources are turned on.
The image is too light or too dark �Adjust the Brightness and Contrast.
�Refer to the Brightness/Contrast
The image color is not good
�Adjust the Color
�Refer to the Color
Image is not centered on the
screen �Executes “Auto Adjustment”.
The power lamp flickers.
�The monitor is using its power management system.
�Move the computer’s mouse or press a key on the key-
oard.
Image is not sta le and may
appear to vi rate
�Check that the display resolution and frequency from your
PC or video oard is an availa le mode for your monitor.
On your computer check : Control Panel, Display, Settings
�Note : Your monitor supports multiscan display functions
within the following frequency domain:
Suggested Actions
6
19 inch wide
408.24 255.15
0.2835
16.2M
1440 900@60Hz
1440 900@75Hz 1440
24pin DVI-D Connector
20
0.5
(Speaker Max 4W )
25
445 350 190
4.3
77
900@60Hz
0.2835