BenQ Interactive Flat Panel T420 Tl550 T650 User Manual

Parts of the display and their functions 11
Input/output terminals
T420TL550
T650
No.NameDescription
AUDIO IN 
(AUDIO1)Receives audio signals from an external device (such as a 
computer).
AUDIO OUT (R/L)Outputs audio signals from an audio or HDMI input source to an 
external device.
SPEAKERS (R/L)  Outputs audio signals from an audio or HDMI input source to 
external speakers.
AUDIO IN
(AUDIO2/AUDIO3)Receives audio signals from an external device (such as a VCR or 
DV D pl aye r).
VIDEO IN...

Parts of the display and their functions 12
VIDEO IN (DVI-D)Receives DVI signals from an external device (such as a 
computer).
VGA INReceives analog RGB signals from an external device (such as a 
computer).
VGA OUTOutputs analog RGB signals from the VGA IN input to another 
display.
RS232C IN/OUTFor external control and multi-display operation.
• RS232C IN: receives control signals from a computer or 
another display.
• RS232C OUT: outputs control signals from the RS232C IN 
input to another display....

Parts of the display and their functions 13
Remote control
 MUTE
Turns on or off the mute function.
 Numeric buttons
These buttons are not used and do not 
work.
 INPUT
Selects an input source.
 
Scrolls through settings and options in the 
OSD menu.
  / VOL-
• Scrolls through settings and options in 
the OSD menu.
• Turns down the volume.
 INFO
Shows the current input source and resolution.
 VGA
Selects the VGA input source.
 DVI
Selects the DVI input source.
 Power
Turns on the display or puts it in...

Parts of the display and their functions 14
Using the remote control
Installing remote control batteries
Remote control usage tips
• Point and aim the top front of the remote control directly at the display’s remote 
control sensor window when you press the buttons.
• Do not let the remote control become wet or place it in humid environments (like 
bathrooms).
• If the display’s remote control sensor window is exposed to direct sunlight or strong 
light, the remote control may not operate properly. In...

Setting up the display 15
Setting up the display
Mounting the display
You can install the display on a vertical surface with a suitable wall mounting bracket or 
on a horizontal surface with the optional desktop stands. Please pay attention to the 
following notes during installation:
• This display should be installed by at least two adult persons. Attempting to install this 
display by only one person may result in danger and injuries.
• Refer the installation to qualified technicians. Improper...

Setting up the display 16
Installing the optional desktop stands 
5. Install the wall mounting bracket 
on the display and attach the 
display to the wall according to 
the mounting bracket’s 
instructions. The length of the 
screw should exceed the 
thickness of the wall mounting 
bracket by at least 10 mm. Make 
sure that all screws are 
tightened and secured properly. 
(Recommended torque: 470 - 
635N•cm). The mounting means 
should be strong enough to bear 
the weight of the display.
• To maintain...

Setting up the display 17
3. Place the desktop stands on the 
display as illustrated.
4. Use the screws and a suitable 
screwdriver to secure the stands on 
the display.(T650)
(T420 / 
TL550)
(T420 / 
TL550)(T650) 

Setting up the display 18
Connecting audio/video signals
Pay attention to the following notes when you connect cables:
• Please turn off all devices.
• Familiarize yourself with the audio/video ports on the display and the devices you want 
to use. Be aware that incorrect connections may adversely affect picture quality.
• Do not remove cables from the ports by pulling the cable itself. Always grasp and pull 
the connectors at the end of the cable. 
• Ensure that all cables are fully inserted and firmly...

Setting up the display 19
4. To view images from this input, press the VGA button on the remote control.
The audio cable is not supplied and should be purchased separately.
First display Second display
D-Sub (15-pin) cable
D-Sub (15-pin) cable Audio cable
Computer TL550 / 
T650
T420 

Setting up the display 20
Connecting the digital input
1. Connect the VIDEO IN (DVI-D) jack on the display to the DVI-D output jack on a 
computer using a DVI-D cable. If the computer has an HDMI output jack, connect 
the computer’s HDMI output jack to the VIDEO IN (HDMI) input jack on the display 
using an HDMI cable or a DVI-D to HDMI conversion cable. 
2. Connect the computer’s audio output jack to the AUDIO IN (AUDIO1) jack on the 
display using a suitable audio cable.
3. To view video image from...