BenQ Projector TH670 User Manual

							Connection 21
Connecting Video source devices
You need only connect the projector to a Video source device using just one of the 
above connecting methods, however each provides a different level of video quality. 
The method you choose will most likely depend upon the availability of matching 
terminals on both the projector and the Video source device as described below:
Connecting an HDMI source device
The projector provides an HDMI input jack that allows you to connect it to an HDMI 
source device like a DVD player, a DTV tuner, a display or a notebook computer.
HDMI (High-Definition Multimedia Interface) supports uncompressed video data 
transmission between compatible devices like DTV tuners, DVD players and displays 
over a single cable. It provides pure digital viewing and listening experience.
Examine your Video source device to determine if it has a set of unused HDMI output 
jacks available:
• If so, you can continue with this procedure.
• If not, you will need to reassess which method you can use to connect to 
the device.
To connect the projector to an HDMI source device:
1. Take an HDMI cable and connect one end to the HDMI output jack of the HDMI 
source device.
2. Connect the other end of the cable to the HDMI signal input jack on the 
projector. Once connected, the audio can be controlled by the projector On-
Screen Display (OSD) menus. See Audio Setup on page 48 for details.
• If the selected video image is not displayed after the projector is turned on and 
the correct video source has been selected, check that the Video source device is 
turned on and operating correctly. Also check that the signal cables have been 
connected correctly.
Te r m i n a l  n a m eTe r m i n a l  
appearanceReferencePicture quality
HDMIHDMII
Connecting an 
HDMI source 
device on page 21Best
Component VideoPC-1/PC-2Connecting a 
Component Video 
source device on 
page 22Better
VideoVIDEOConnecting a 
composite source 
device on page 23Good 
						

							Connection 22
• In the unlikely event that you connect the projector to a DVD player via the 
projectors HDMI input and the projected picture displays wrong colors, please 
change the color space to YUV. 
Connecting a Component Video source device
Examine your Video source device to determine if it has a set of unused Component 
Video output jacks available: 
• If so, you can continue with this procedure.
• If not, you will need to reassess which method you can use to connect to 
the device.
To connect the projector to a Component Video source device:
1. Take a Component Video to VGA (D-Sub) adaptor cable and connect the end 
with 3 RCA type connectors to the Component Video output jacks of the Video 
source device. Match the color of the plugs to the color of the jacks; green to 
green, blue to blue, and red to red.
2. Connect the other end of the Component Video to VGA (D-Sub) adaptor cable 
(with a D-Sub type connector) to the PC-1 or PC-2 jack on the projector.
3. If you wish to make use of the projector speaker(s) in your presentations, take a 
suitable audio cable and connect one end of the cable to the audio output jack of 
the device, and the other end to the AUDIO (L/R) jack of the projector.
4. If you wish, you can use another suitable audio cable and connect one end of the 
cable to the AUDIO OUT jack of the projector, and the other end to your 
external speakers (not supplied).
Once connected, the audio can be controlled by the projector On-Screen 
Display (OSD) menus. See Audio Setup on page 48 for details.
The built-in speaker will be muted when the AUDIO OUT jack is connected.
If the selected video image is not displayed after the projector is turned on and the 
correct video source has been selected, check that the Video source device is turned 
on and operating correctly. Also check that the signal cables have been connected 
correctly. 
						

							Connection 23
Connecting a composite source device
Examine your Video source device to determine if it has an unused composite output 
jack available: 
• If so, you can continue with this procedure.
• If not, you will need to reassess which method you can use to connect to 
the device.
To connect the projector to a Video source device:
1. Take a Video cable and connect one end to the Video output jack of the Video 
source device.
2. Connect the other end of the Video cable to the VIDEO jack on the projector.
3. If you wish to make use of the projector speaker(s) in your presentations, take a 
suitable audio cable and connect one end of the cable to the audio output jack of 
the device, and the other end to the AUDIO (L/R) jack of the projector.
4. If you wish, you can use another suitable audio cable and connect one end of the 
cable to the AUDIO OUT jack of the projector, and the other end to your 
external speakers (not supplied).
Once connected, the audio can be controlled by the projector On-Screen 
Display (OSD) menus. See Audio Setup on page 48 for details.
The built-in speaker will be muted when the AUDIO OUT jack is connected.
If the selected video image is not displayed after the projector is turned on and the 
correct video source has been selected, check that the Video source device is turned 
on and operating correctly. Also check that the signal cables have been connected 
correctly. 
						

							Operation
24
Operation
Starting up the projector
1. Plug the power cord into the projector and 
into a power outlet. Check that the POWER 
indicator light on the projector lights 
orange after power has been applied.
• Please use the original accessories (e.g. power 
cable) only with the device to avoid possible 
dangers such as electric shock and fire.
• If Direct Power On function (in the Advanced 
menu > System Setup: Basic)* is activated, the projector will turn on 
automatically after the power cord has been connected and power has been 
applied. See Direct Power On on page 56 for details. 
• *There are two menu types for your selection. One is Basic, and the other is 
Advanced. From the Basic menu, you can select Menu Type when the projector 
is without input signal. From the Advanced menu, you can select Menu Type in 
the System Setup: Basic > Menu Settings menu. See Using the menus on page 
28 for details.
2. Make sure the lens cover is open. If it is 
closed, it could become deformed due to the 
heat produced by the projection lamp.
3. Press  POWER on the projector or 
ON on the remote control to start the 
projector. The POWER indicator light 
flashes and stays green when the projector 
is on. 
The start up procedure takes about 10-20 
seconds. In the later stage of start up, a 
startup logo is projected. 
(If necessary) Use the focus ring to adjust the image clearness.
If the projector is still hot from previous activity, it will run the cooling fan for 
approximately 90 seconds before energizing the lamp. 
4. If the projector is activated for the first time, follow the on-screen instructions 
to complete the setup.
5. If you are prompted for a password, press the arrow keys to enter a six digit 
password. See Utilizing the password function on page 31 for details.
6. Switch all of the connected equipment on.
II 
						

							Operation 25 7. The projector will start to search for input signals. The current input signal being 
scanned displays in the screen. If the projector doesnt detect a valid signal, the 
message No Signal will continue displaying until an input signal is found. 
You can also press SOURCE on the projector or remote control to select your 
desired input signal. See Switching input signal on page 33 for details.
• If no signal is detected for 3 minutes, the projector automatically enters ECO  
BLANK mode.
Adjusting the projected image
Adjusting the projection angle
The projector is equipped with 1 quick-release adjuster foot and 1 rear adjuster foot. 
These adjusters change the image height and projection angle. To adjust the projector:
1. Press the quick-release button and lift the 
front of the projector. Once the image is 
positioned where you want it, release the 
quick-release button to lock the foot in 
position.
2. Screw the rear adjuster foot to fine tune 
the horizontal angle.
To retract the foot, hold up the projector while 
pressing the quick-release button, then slowly lower the projector. Screw the rear 
adjuster foot in a reverse direction.
If the projector is not placed on a flat surface or the screen and the projector are not 
perpendicular to each other, the projected image becomes trapezoidal. To correct 
this situation, see Correcting keystone on page 26 for details.
• Do not look into the lens while the lamp is on. The strong light from the lamp 
may cause damage to your eyes.
• Be careful when you press the adjuster button as it is close to the exhaust vent 
where hot air comes from.
12 
						

							Operation
26
Auto-adjusting the image
In some cases, you may need to optimize the 
picture quality. To do this, press AUTO on 
the projector or remote control. Within 5 
seconds, the built-in Intelligent Auto 
Adjusent function will re-adjust the values of 
Frequency and Clock to provide the best 
picture quality.  
• The screen will display Auto adjusting 
while AUTO is functioning.
• This function is only available when PC signal (analog RGB) is selected.
Correcting keystone
Keystoning refers to the situation where the projected image is noticeably wider at either 
the top or bottom. It occurs when the projector is not perpendicular to the screen. 
To correct this, you can follow one of these steps.
• Auto V-Keystone adjustment
1. Press /  or KEYSTONE on the remote 
control to display the Key s t o n e page.
2. Press OK for 2 seconds to enable Auto V-
Ke y s t o n e .
• Manual V-Keystone adjustment
1. Press /  or KEYSTONE on the remote 
control to display the Key s t o n e page.
2. Press  /  to adjust the V-Keystone manually. 
						

							Operation 27
Fine-tuning the image size and clarity
1. Adjust the projected image to the size 
that you need using the zoom slide lever.
2. Then sharpen the image by using the focus 
ring. 
						

							Operation
28
Using the menus
The projector is equipped with On-Screen Display (OSD) menus for making various 
adjusents and settings. There are two menu types for your selection. One is Basic, 
and the other is Advanced.
Below is the overview of the Basic menu -- without input signal.
The following example describes how to set the OSD menu in the Basic menu.
1. Press MENU to turn the OSD menu on.
2. Use  /// to select the desired item and press OK to confirm the 
selection.
3. Follow the on-screen instructions to select your settings.
4. Press MENU to leave and save the settings.
Menu itemHighlight 
						

							Operation 29 Below is the overview of the Basic menu -- with input signal.
The following example describes how to set the OSD menu in the Basic menu.
1. Press MENU to turn the OSD menu on.
2. Use  /  to select the desired item and follow the on-screen instructions to 
select your settings.
3. Press MENU to leave and save the settings.
Menu item
Highlight 
						

							Operation
30Below is the overview of the Advanced menu.
The following example describes how to set the OSD menu.
1. Press MENU to turn the OSD menu 
on.3. Press   to select 
Background Color and 
press  /  to select a 
background color.
2. Use  /  to select the System 
Setup: Basic menu.4. Press MENU to leave and 
save the settings.
Main menu icon
Main menu
Sub-menu
Highlight
(selected)
Press MENU 
to the 
previous page 
or to exit. Status
Current input signal