BenQ Projector HT4050 User Manual

							Projector features 11
Controls and functions
Projector
9. TEMPerature indicator light
Lights up red if the projectors temperature 
becomes too high. See Indicators on page 
68 for details.
10. Keystone/Arrow keys (/▲ Up)
Manually corrects distorted images 
resulting from an angled projection. 
See Correcting keystone on page 32 for 
details.
11. LAMP indicator light
Indicates the status of the lamp. Lights up 
or flashes when the lamp has developed a 
problem. See Indicators on page 68 for 
details.
12. AUTO
Automatically determines the best picture 
timings for the displayed image.
13.► Right/ Increase volume level
Increases volume.
When the On-Screen Display (OSD) menu 
is activated, the #6,
#10, #13, and #16 keys 
are used as directional arrows to select the 
desired menu items and to make 
adjustments. See Using the Advanced OSD 
menu on page 39 for details.
14. OK/MODE
Selects an available picture setup mode. 
Confirm the selected On-Screen Display 
(OSD) menu item. See Using the 
Advanced OSD menu on page 39 for 
details.
15. MENU
Turns on the On-Screen Display (OSD) 
menu. Goes back to previous OSD menu, 
exits and saves menu settings. 
See Using the 
Advanced OSD menu on page 39 for details.
16. Keystone/Arrow keys (/▼ Down)
Manually corrects distorted images 
resulting from an angled projection. See 
Correcting keystone on page 32 for 
details. 1. FOCUS ring
Used to adjust the projected image 
appearance. See Fine-tuning the image size 
and clarity on page 32 for details.
2. Zoom slide lever
Used to adjust the projected image 
appearance. See Fine-tuning the image size 
and clarity on page 32 for details.
3. LENS SHIFT adjuster
Used to adjust the projector len left, right, 
up or down. See Shifting the projection 
lens on page 19 for details.
4. POWER indicator light
Lights up or flashes when the projector is 
under operation. See Indicators on page 
68 for details.
5. SOURCE
Displays the source selection bar. See 
Switching input signal on page 43 for 
details.
6.◄ Left/ Decrease volume level
Decreases volume.
7. POWER
Toggles the projector between standby 
mode and on.
See Starting up the projector on page 29 
and Shutting down the projector on page 
57 for details.
8. BACK
Goes back to previous OSD menu, exits and 
saves menu settings.
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4
6
7
8
5
3
29
12
13141516
11
10 
						

							Projector features 12
Remote control
1.  ON,   OFF
Toggles the projector between on and off 
mode.
2. 3D, INVERT
Launches the 3D menu and toggles the 
invert function between on and off.
3. Arrow keys (▲ Up/▼ Down/◄ Left/
► Right)
When the On-Screen Display (OSD) menu 
is activated, these keys are used as 
directional arrows to select the desired 
menu items and to make adjustments.
When the OSD menu is off and you are 
under the MHL connection mode, these 
arrows keys are available for controlling 
your smart device.4. OK
Confirms the selected OSD menu item.
When the OSD menu is off and you are 
under the MHL connection mode, use the 
key to confirm the selection on the OSD 
of your smart device.
5. BACK
Goes back to previous OSD menu, exits 
and saves menu settings.
When the OSD menu is off and you are 
under the MHL connection mode, use the 
key to return or exit the OSD menu of 
your smart device.
6. , , 
•Mute: Toggles projector audio 
between on and off.
•Volume Down: Decreases the 
projector volume.
•Volume Up: Increases the projector 
volume.
7. MHL Control buttons
(  Backward,   Play/Pause,   
Forward,  Rewind, 
 Stop,  Fast forward)
Goes to the previous file/Plays/Pauses/
Goes to the next file/Rewinds/Stops/Fast-
forwards during media playback. Only 
available when controlling your smart 
device in MHL mode.
When you are under the MHL connection 
mode and the OSD is off, these buttons are 
available for controlling your smart device: 
arrow keys, OK, BACK, and MHL control 
buttons.
8. KEYSTONE
Launches the 2D Keystone window. Use 
the Arrow keys to manually correct 
distorted images resulting from an angled 
projection.
9. Picture quality adjustment keys
These function keys perform the same 
tasks as specified in the OSD menu.
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2
4
6
5
7
8
9
3
10
11
12
13
14
15
16 
						

							Projector features 13
10. LIGHT
The LED backlight lights up and stays on 
for approximately 30 seconds when 
pressing any key on the remote control. 
Pressing any other keys within the 10 
second again turns the LED backlight off.
11. AUTO
Automatically determines the best picture 
timings for the displayed image.
12. ECO BLANK
Used to blank the screen picture.
13. MENU
• Accesses the On-Screen Display 
(OSD) menu.
• Goes back to previous OSD menu, 
exits and saves menu settings.
14. SOURCE
Displays the source selection bar.15. MODE
Selects an available picture mode.
16. FINE TUNE
Displays the Color Temperature Fine 
Tuning window. See Color 
Temperature Fine Tuning on page 58 for 
details.
PIP and SWAP keys are not available. 
						

							Projector features 14
Remote control effective range
Infra-Red (IR) remote control sensor is located on the 
front and the top of the projector. The remote 
control must be held at an angle within 30 degrees 
perpendicular to the projectors IR remote control 
sensor to function correctly. The distance between 
the remote control and the sensor should not exceed 
8 meters (~ 26 feet). 
Make sure that there are no obstacles between the 
remote control and the IR sensor on the projector 
that might obstruct the infra-red beam.
Appr
ox. 
±
30°
A
p
p
ro
x. 
±3
0
° 
						

							Projector features 15
Replacing the remote control battery 
• Avoid excessive heat and humidity. 
• There may be battery damage if the battery is incorrectly replaced. 
• Replace only with the same or equivalent type recommended by the battery manufacturer.
• Dispose of the used battery according to the battery manufacturer’s instructions.
• Never throw a battery into a fire. There may be danger of an explosion. 
• If the battery is dead or if you will not be using the remote control for a long time, remove 
the battery to prevent damage to the remote control from possible battery leakage.
1. Remove the battery compartment cover by 
sliding the cover in the direction of the 
arrow.
2. Insert the supplied batteries taking note of 
the polarity (+/-) as shown here.
3. Replace the cover. 
						

							Positioning your projector 16
Positioning your projector
Choosing a location
Before choosing an installation location for your projector, take the following factors into 
consideration:
• Size and position of your screen
• Electrical outlet location
• Location and distance between the projector and the rest of your equipment
You can install your projector in the following ways. 
1. Front Table 
Select this location with the projector placed near the floor in front of 
the screen.
This is the most common way to position the projector for quick setup 
and portability.
Turn on the projector and make the following settings:
MENU > Settings or System Setup : Basic > Projector Position 
> Front
2. Rear Table 
Select this location with the projector placed near the floor behind the 
screen.
Turn on the projector and make the following settings:
MENU > Settings or System Setup : Basic > Projector Position 
> Rear
A special rear projection screen is required.
3. Front Ceiling 
Select this location with the projector suspended from the ceiling in 
front of the screen.
Turn on the projector and make the following settings:
MENU > Settings or System Setup : Basic > Projector Position 
> Front Ceiling
Purchase the BenQ Projector Ceiling Mount Kit from your dealer to mount 
your projector on the ceiling.
4. Rear Ceiling 
Select this location with the projector suspended from the ceiling behind 
the screen.
Turn on the projector and make the following settings:
MENU > Settings or System Setup : Basic > Projector Position 
> Rear Ceiling
A special rear projection screen and the BenQ Projector Ceiling Mount Kit 
are required. 
						

							Positioning your projector 17
Obtaining a preferred projected image size
The projected image size is determined by the distance from the projector lens to the 
screen, the zoom setting, and the video format.
Projection dimensions
Refer to Dimensions on page 71 for the center of lens dimensions of this projector 
before calculating the appropriate position.
The screen aspect ratio is 16:9 and the projected picture is 16:9. 




Floor Installation
: Screen             : Center of lens
 
 

Ceiling Installation
: Screen             : Center of lens
Screen dimensionsProjection distance  [mm]Lowest/Highest 
lens position 
[mm]
Diagonal  
[inch (mm)]Height 


[mm]Width 
 
[mm]Min 
distance 
(with max 
zoom)avg
Min 
distance 
(with min 
zoom)(min.)(max.)
36.4 (925) 454 806 - - 1500 68 125
40 (1016) 498 886 1018 1333 1647 75 137
50 (1270) 623 1107 1273 1666 2059 93 171
60 (1524) 747 1328 1528 1999 2471 112 205
70 (1778) 872 1550 1782 2332 2882 131 240
80 (2032) 996 1771 2037 2665 3294 149 274
90 (2286) 1121 1992 2291 2999 3706 168 308
100 (2540) 1245 2214 2546 3332 4118 187 342
110 (2794) 1370 2435 2800 3665 4529 205 377
120 (3048) 1494 2657 3055 3998 4941 224 411
130 (3302) 1619 2878 3310 4331 5353 243 445
140 (3556) 1743 3099 3564 4664 5765 262 479
150 (3810) 1868 3321 3819 4998 6177 280 514
160 (4064) 1992 3542 4073 5331 6588 299 548
170 (4318) 2117 3763 4328 5664 7000 318 582
180 (4572) 2241 3985 4583 5997 7412 336 616
190 (4826) 2366 4206 4837 6330 7824 355 651
196.4 (4989) 2446 4348 5000 - - 367 673 
						

							Positioning your projector 18
There is 5% tolerance among these numbers due to optical component variations. BenQ 
recommends that if you intend to permanently install the projector, you should physically test 
the projection size and distance using the actual projector before you permanently install it, so 
as to make allowance for this projectors optical characteristics. This will help you determine 
the exact mounting position so that it best suits your installation location. 
						

							Positioning your projector 19
Shifting the projection lens
The lens shift control provides flexibility for installing your projector. It allows the 
projector to be positioned off the center of the screen.
The lens shift is expressed as a percentage of the projected image width or height. It is 
measured as an offset from the projected image’s horizontal or vertical center. You can 
shift the projection lens within the allowable range depending on your desired image 
position. 
Lens shift adjustment will not result in a degraded picture quality. In the unlikely event that the 
image distortion is produced, see Correcting keystone on page 32 for details.
 
Front Table
Normal
projection
position
Max

0/125V1V
0025H
0/025H
Height of projected image
Width
of
projected
image
1H
Shift to LeftShift to Right
Front Ceiling
1V
Max

0/125V
Vertical Shift
Ve rtical

Shift
Height of projected image
Center of lensCenter of lens 
						

							Connection 20
Connection
When connecting a signal source to the projector, be sure to:
1. Turn all equipment off before making any connections.
2. Use the correct signal cables for each source.
3. Ensure the cables are firmly inserted. 
• In the connections shown below, some cables may not be included with the projector (see 
Shipping contents on page 8). They are commercially available from electronics stores.
• The connection illustrations below are for reference only. The rear connecting jacks 
available on the projector vary with each projector model.  
*For updating the firmware.1. USB cable*
2. VGA cable
3. HDMI cable
4. Component Video to VGA (D-Sub) 
adapter cable5. Component Video to Component 
cable
6. Video cable
7. Audio L/R cable
8. Audio cable
9. HDMI-Micro USB cable
8
768
1
34
39
3
2
5
Notebook or desktop

computer
A/V device
Speakers
Smartphone or 
tablet PC