BenQ TH681+ User Manual Page 24
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Operation24
Disabling the password function
To disable password protection, go back to the SYSTEM SETUP: Advanced >
Security Settings > Change Security Settings menu after opening the OSD menu
system. Press MODE/ENTER. The message “INPUT PASSWORD” appears. Enter
the current password.
i. If the password is correct, the OSD menu returns to the Security Settings
page.
Press to highlight Power On Lock and press / to select Off. You will
not have to enter the password next time when turning on the projector.
ii. If the password is incorrect, the password error message appears lasting for
three seconds, and the message “INPUT PASSWORD” appears for your
retry. You can press MENU/EXIT to cancel the change or try another
password.
Though the password function is disabled, you need to keep the old password in hand should you ever need to
re-activate the password function by entering the old password.
Switching input signal
The projector can be connected to multiple devices at the same time. However, it can only
display one full screen at a time. When starting up, the projector automatically searches for
the available signals.
Be sure the Quick Auto Search function in the SOURCE menu is On if you want the
projector to automatically search for the signals.
To select the source:
1. Press SOURCE on the projector or remote
control. A source selection bar appears.
2. Press / until your desired signal is selected
and press MODE/ENTER.
Once detected, the selected source information
will display at the corner of 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 brighter than "Video" using mostly moving images
(movies).
• The native display resolution of this projector is in a 16:9 aspect
ratio. For best display picture results, you should select and use
an input signal which outputs at this resolution. Any other
resolutions will be scaled by the projector depending upon the
“aspect ratio” setting, which may cause some image distortion
or loss of picture clarity. See "Selecting the aspect ratio" on
page 25 for details.
Computer1/YPbPr1
Computer2/YPbPr2
HDMI
Video
S-Video
Network Display
USB Display
USB Reader
- TH681/TH681+ 1
- Digital Projector 1
- User Manual 1
- Ta b l e o f c o nte n t s 2
- Important safety instructions 3
- (10000 feet) 5
- (0 feet) 5
- Introduction 7
- Shipping contents 8
- Projector exterior view 9
- Controls and functions 10
- Remote control 11
- Positioning your projector 13
- Projection dimensions 14
- Connection 16
- Connecting audio 17
- Operation 18
- Adjusting the projected image 19
- Correcting keystone 20
- Using the menus 21
- Securing the projector 22
- If you forget the password 23
- Changing the password 23
- Switching input signal 24
- Selecting the aspect ratio 25
- About the aspect ratio 26
- Optimizing the image 27
- 3D Color Management 29
- Remote paging operations 31
- Freezing the image 31
- Hiding the image 32
- Locking control keys 32
- Adjusting the sound 33
- Using the test pattern 33
- Using the teaching templates 34
- Shutting down the projector 35
- Direct power off 35
- Menu operation 36
- Main menu Sub-menu Options 37
- Operation38 38
- Description of each menu 39
- Function Description 40
- Teaching 40
- Template 40
- 1. DISPLAY menu 40
- Settings and Baud Rate 45
- Maintenance 46
- Lamp information 47
- Timing of replacing the lamp 48
- Replacing the lamp 49
- Maintenance 51 51
- Indicators 52
- Troubleshooting 53
- Specifications 54
- Dimensions 55
- Ceiling mount installation 55
- Timing chart 56
- Specifications 57 57
- Specifications58 58
- Specifications 59 59
- Limited warranty 60
- Copyright 60
- Disclaimer 60
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