BenQ Projector TH670 User Manual

Operation 31
Securing the projector
Using a security cable lock
The projector has to be installed in a safe place to prevent theft. Otherwise, purchase 
a lock, such as the Kensington lock, to secure the projector. You can locate a 
Kensington lock slot on the rear side of the projector. See item 20 on page 10 for 
details.
A Kensington security cable lock is usually a combination of key(s) and the lock. Refer 
to the locks documentation for finding out how to use it.
Utilizing the password function
For...

Operation
32
If you forget the password
If the password function is activated, you will be 
asked to enter the six-digit password every time 
you turn on the projector. If you enter the wrong 
password, the password error message as pictured 
to the right displays lasting for three seconds, and 
the message ‘Input Current Password’ follows. 
You can retry by entering another six-digit 
password, or if you did not record the password in this manual, and you absolutely do 
not remember it, you can use the...

Operation 33
Keep this manual in a safe place.
6. Confirm the new password by re-entering the new password.
7. You have successfully assigned a new password to the projector. Remember to 
enter the new password next time the projector is started.
8. To leave the OSD menu, press 
MENU on the projector or remote control.
Disabling the password function
To disable password protection, go back to the System Setup: Advanced > 
Password > Power On Lock menu and press OK on the projector or the remote 
control....

Operation
342. Press  /  until your desired signal is selected 
and press OK on the projector or remote 
control. 
Once detected, the selected source information 
will display on the screen for seconds. If there is 
multiple equipment connected to the projector, 
repeat steps 1-2 to search for another signal.
• The brightness level of the projected image will 
change accordingly when you switch between 
different input signals. Data (graphic) PC 
presentations using mostly static images are 
generally...

Operation 35
About the aspect ratio
In the pictures below, the black portions are inactive areas and the white portions 
are active areas. OSD menus can be displayed on those unused black areas.
1.Auto: Scales an image proportionally to fit the 
projectors native resolution in its horizontal or 
vertical width. This is suitable for the incoming 
image which is neither in 4:3 nor 16:9 and you 
want to make most use of the screen without 
altering the images aspect ratio.
2.4:3: Scales a picture so that it...

Operation
36
Optimizing the image
Selecting a picture mode
The projector is preset with several predefined 
picture modes so that you can choose one to 
suit your operating environment and input 
signal picture type.
To select an operation mode that suits your 
need, you can follow one of the following steps.
• Press MODE on the projector or remote 
control repeatedly until your desired mode 
is selected.
•Go to the Picture Mode menu (which is in the Basic menu when the projector 
is with input signal or...

Operation 37
Renaming user modes
You can change User 1 and User 2 to the names easy to be identified or understood 
by the users of this projector. The new name can be up to 12 characters including 
English letters (A-Z, a-z), digits (0-9), and space (_).
To rename user modes:
1. Make sure the Menu Type is Advanced. See Using the menus on page 28 for 
details.
2. Go to the Picture > Picture Mode > User 1 or User 2 menu. 
3. Go to the User Mode Management > Rename User Mode and press OK 
on the projector...

Operation
38According to the detected signal type, there are some user-definable functions 
available when User 1 or User 2 mode is selected. Based on your needs, you can 
make adjustments to these functions by selecting them and pressing  /   on the 
projector or remote control.
Adjusting Brightness
The higher the value, the brighter the image. And 
the lower the setting, the darker the image. Adjust 
this control so the black areas of the image appear 
just as black and that detail in the dark areas is...

Operation 39
Advanced picture quality controls
There are more advanced functions in the Advanced menu > Picture > Advanced... 
menu to be adjusted to your preference. To save the settings, just press MENU to leave 
the OSD menu.
Setting Black Level
Select Black Level and press  /  on the projector or remote control to select 0 IRE 
or 7.5 IRE.
The grayscale video signal is measured in IRE units. In some areas which use NTSC TV 
standard, the grayscale is measured from 7.5 IRE (black) to 100 IRE (white);...

Operation
40
Setting a preferred color temperature
Select Color Temperature Fine Tuning in the Advanced menu > Picture > 
Advanced... menu and press OK on the projector or remote control.
1. Select Color Temperature and select Cool, Normal, Lamp Native or Warm 
by pressing  /   on the projector or remote control.
2. Got to Advanced... > Color Temperature Fine Tuning and press OK on 
the projector or remote control. 
3. Press  /  to select the item you want to change and adjust the values by 
pressing /...