BenQ Th681 Digital Projector User Manual

TH681
Digital Projector
User Manual 

Table of contents 2
Ta b l e  o f  c o n t e n t s
Important safety 
instructions ........................... 3
Introduction .......................... 7
Projector features ..................................... 7
Shipping contents ...................................... 8
Projector exterior view........................... 9
Controls and functions ..........................10
Positioning your 
projector.............................. 13
Choosing a location ................................13
Obtaining a...

Important safety instructions 3
Important safety instructions
Your projector is designed and tested to meet the latest standards for safety of information 
technology equipment. However, to ensure safe use of this product, it is important that 
you follow the instructions mentioned in this manual and marked on the product. 
Safety Instructions
1.Please read this manual before 
you operate your projector. Save 
it for future reference. 
2.Do not look straight at the 
projector lens during operation. 
The...

Important safety instructions 4
  
Safety Instructions (Continued)
7. The lamp becomes extremely hot 
during operation. Allow the projector 
to cool for approximately 45 minutes 
prior to removing the lamp assembly 
for replacement. 
8. Do not operate lamps beyond the 
rated lamp life. Excessive operation of 
lamps beyond the rated life could 
cause them to break on rare 
occasions. 
9. Never replace the lamp assembly or 
any electronic components unless the 
projector is unplugged. 10. Do not place this...

Important safety instructions 5
    
Safety Instructions (Continued)
13. Do not place this projector in any of 
the following environments.
- Space that is poorly ventilated or 
confined. Allow at least 50 cm 
clearance from walls and free flow of air 
around the projector. 
- Locations where temperatures may 
become excessively high, such as the 
inside of a car with all windows rolled 
up.
- Locations where excessive humidity, 
dust, or cigarette smoke may 
contaminate optical components, 
shorten the...

Important safety instructions 6
Safety Instructions (Continued)
17. Do not step on the projector or place 
any objects upon it. Besides probable 
physical damage to the projector, doing 
so may result in accidents and possible 
injury.
18. Do not place liquids near or on the 
projector. Liquids spilled into the 
projector may cause it to fail. If the 
projector does become wet, 
disconnect it from the power supplys 
power outlet and call BenQ to have 
the projector serviced.
19. This product is capable...

Introduction 7
Introduction
Projector features
The projector offers the following features
• Full HD compatible
The projector is compatible with Standard Definition TV (SDTV) 480i, 480p, 576i, 576p 
and High Definition TV (HDTV) 720p, 1080i and 1080p formats, with the 1080p format 
providing a true 1:1 image reproduction.
• SmartEco™ starts your dynamic power saving
The SmartEco™ technology offers a new way of operating the projector lamp system 
and saves lamp power depending on the content brightness...

Introduction 8
Shipping contents
Carefully unpack and verify that you have all of the items shown below. If any of these items 
are missing, please contact your place of purchase.
Standard accessories
The supplied accessories will be suitable for your region, and may differ from those illustrated.
*The warranty card is only supplied in some specific regions. Please consult your dealer for detailed 
information.
Optional accessories
1. Spare lamp kit
2. Ceiling mount kit
3. Carry bagProjector Power cord...

Introduction 9
Projector exterior view
1. External control panel
(See Controls and functions on page 10 
for details.)
2. Lamp cover
3. Vent (heated air exhaust)
4. Quick-release button
5. Lens cap
6. Focus and Zoom ring
7. Vent (cool air intake)
8. Speaker grill
9. Front IR remote sensor
10. Projection lens
11. RS232 control port
12. USB port
13. HDMI-input port
14. RGB signal output jack
15. RGB (PC)/Component Video (YPbPr/ 
YCbCr) signal input jack
16. S-Video input jack
Video input jack
17. Audio...

Introduction 10
Controls and functions
Projector
1. Focus ring
Adjusts the focus of the projected image.
2. Zoom ring
Adjusts the size of the image.
3. Top IR remote sensor
4. MENU/EXIT
Turns on the On-Screen Display (OSD) 
menu. Goes back to previous OSD menu, 
exits and saves menu settings.
5. POWER
Toggles the projector between standby 
mode and on.
6.  Left/
Decreases the projector volume.
7. MODE/ENTER
Selects an available picture setup mode.
Activates the selected On-Screen Display 
(OSD) menu...