Viewsonic VT550 ユーザーズマニュアル

Setting the timing mode is important for maximizing the quality of the 
screen image and minimizing eye strain. The timing mode consists of the 
resolution (example 1024 x 768) and refresh rate (or vertical frequency; 
example 75 Hz). After setting the timing mode, use the OnView

®

 controls 

to adjust the screen image. 

For the best picture quality set your LCD display timing mode to: 
VESA 1024 x 768 @ 60Hz.

To set the Timing Mode:

Set the resolution: Right-click on the Windows desktop > Properties > 
Settings > set the resolution.

Set the refresh rate: See your graphic card's user guide for instructions.

Do not set the graphics card in your computer to exceed the 

maximum refresh rate of 75Hz; doing so may result in permanent damage to 
your LCD display.

You can lock the On Screen Displays (OSDs) and/or the power button to prevent 
unwanted changes to the current image settings.

• OSD LOCK: Press and hold the [1] and [

▲

]

 

buttons on the face of the 

monitor for 10 seconds. The message OSD LOCK will then display briefly 
indicating that the OSD image settings are now locked.

• OSD UNLOCK: Press and hold the [1] and [

▲

]

 

buttons again for 10 

seconds. The message OSD UNLOCK will then display briefly indicating 
that the OSD image settings are now unlocked.

• POWER BUTTON LOCK: Press and hold [1] and the down arrow 

▼

 for 10 

seconds. If the power button is pressed the message Power Button Locked
will display for 5 seconds. With or without this setting, after a power failure, 
your LCD display’s power will automatically turn ON when power is 
restored.

• POWER BUTTON UNLOCK: Press and hold [1] and the down arrow 

▼

again for 10 seconds.

ViewSonic        V

T550

6