BenQ Projector HT4050 User Manual

							Menu Functions 61
System 
Setup: 
Advanced
Lamp SettingsReset Lamp Timer/Lamp Timer
HDMI SettingsHDMI FormatAuto/PC Signal/Video Signal
PC Signal: 0 ~255 level
Video Signal: 6~235 level
CEC On/Off
Baud Rate9600/19200/38400/57600/115200
Test PatternOn/Off
Closed CaptionClosed Caption 
EnableOn/Off
Caption Version CC1/CC2/CC3/CC4
Quick CoolingOn/Off
High Altitude 
ModeOn/Off
PasswordChange Password
Pow e r  O n  L o c kOn/Off
Key  L o c k  On/Off
LED Indicator On/Off
Reset All 
Settings
ISFInput password
Information
Source
Picture Mode
Resolution
Color System
Lamp Usage 
Time
3D Format
Firmware 
Version
Main menu Sub-menu Options 
						

							Maintenance 62
Maintenance
Care of the projector
Your projector needs little maintenance. The only thing you need to do on a regular basis 
is to keep the lens clean.
Never remove any parts of the projector except the lamp. Contact your dealer if other 
parts need replacing.
Cleaning the lens
Clean the lens whenever you notice dirt or dust on the surface.
Before cleaning any part of the projector, turn it off using the proper shutdown procedure 
(see Shutting down the projector on page 57), unplug the power cable, and let it cool 
down completely.
• Use a canister of compressed air to remove dust. 
• If there is dirt or smears, use lens-cleaning paper or moisten a soft cloth with lens 
cleaner and gently wipe the lens surface.
• Never use any type of abrasive pad, alkaline/acid cleaner, scouring powder, or volatile 
solvent, such as alcohol, benzene, thinner or insecticide. Using such materials or 
maintaining prolonged contact with rubber or vinyl materials may result in damage to 
the projector surface and cabinet material.
Never touch the lens with your finger or rub the lens with abrasive materials. Even paper towels 
can damage the lens coating. Only ever use a proper photographic lens brush, cloth, and 
cleaning solution. Do not attempt to clean the lens while the projector is switched on or is still 
hot from previous use.
Cleaning the projector case
Before you clean the case, turn the projector off using the proper shutdown procedure as 
described in Shutting down the projector on page 57 and unplug the power cord and let 
it cool down completely. 
• To remove dirt or dust, wipe the case with a soft, lint-free cloth.
• To remove stubborn dirt or stains, moisten a soft cloth with water and a neutral pH 
detergent. Then wipe the case.
Never use wax, alcohol, benzene, thinner or other chemical detergents. These can damage the 
case.
Storing the projector
To store the projector for an extended time.
• Make sure the temperature and humidity of the storage area are within the 
recommended range for the projector. Please refer to Specifications on page 70 or 
consult your dealer about the range.
• Retract the adjuster feet.
• Remove the battery from the remote control.
• Pack the projector in its original packing or equivalent. 
						

							Maintenance 63
Transporting the projector
It is recommended that you ship the projector with its original packing or equivalent.
Lamp information
Getting to know the lamp hour
When the projector is in operation, the duration (in hours) of lamp usage is automatically 
calculated by the built-in timer.
To obtain the lamp hour information:
1. Press MENU and then use the arrow keys (▲/▼/◄/►) to go to Information or 
Settings > Information.
2. The Equivalent Lamp Hour information displays.
3. Press BACK to exit.
Extending lamp life
The projection lamp is a consumable item. To keep the lamp life as long as possible, you 
can do the following settings via the Advanced OSD menu.
To access the Advanced OSD menu, see About the OSD Menus on page 33 for details.
Setting Lamp Power
Setting the projector in Economic or SmartEco mode also extends the lamp life. 
Using Economic mode reduces system noise and power consumption by 30%. Using 
SmartEco mode reduces system noise and lamp power consumption by up to 70%. If the 
Economic or SmartEco mode is selected, the light output will be reduced and result in 
darker projected pictures.
1. Go to Picture > Lamp Power.
2. Press OK to display the Lamp Power window
3. Press ◄/► to move to your desired mode, and press OK.
4. When done, press BACK to save your changes and exit.
Setting Auto Power Off
This function allows the projector to turn off automatically if no input source is detected 
after a set period of time.
1. Go to System Setup : Basic > Auto Off.
2. Press ◄/► to select a time period. If the preset time lengths are not suitable for 
your presentation, select Disable, and the projector will not automatically shut 
down in a certain time period.
3. When done, press BACK to save your changes and exit.
Lamp modeDescription
Normal100% lamp brightness
EconomicSaves 30% lamp power consumption
SmartEcoSaves up to 70% lamp power consumption depending on the content 
brightness level 
						

							Maintenance 64
Timing of replacing the lamp
When the Lamp indicator lights up red or a message appears suggesting it is time to 
replace the lamp, please install a new lamp or consult your dealer. An old lamp may cause a 
malfunction in the projector and in some instances the lamp may explode.
Go to http://www.benq.com for a replacement lamp.
The Lamp indicator light and Temperature warning light will light up if the lamp becomes too 
hot. See Indicators on page 68 for details.
The following lamp warning displays will remind you to change the lamp.
The warning messages below are for reference only. Please follow the actual on-screen 
instructions to prepare and replace the lamp. 
XXXX shown in the above messages are numbers that vary depending on different models.
StatusMessage
Install a new lamp for optimal performance. If 
the projector is normally run with Economic 
selected (See Getting to know the lamp hour 
on page 63), you may continue to operate the 
projector until the next lamp warning appears.
Press OK to dismiss the message.
It is strongly recommended that you replace 
the lamp at this age. The lamp is a consumable 
item. The lamp brightness diminishes with use. 
This is normal lamp behavior. You can replace 
the lamp whenever you notice that the 
brightness level has significantly diminished.
Press OK to dismiss the message.
The lamp MUST be replaced before the 
projector will operate normally.
Press OK to dismiss the message. 
						

							Maintenance 65
Replacing the lamp
• If lamp replacement is performed while the projector is suspended upside-down from the 
ceiling, make sure that no one is underneath the lamp socket to avoid any possible injury or 
damage to the human eyes caused by fractured lamp.
• To reduce the risk of electrical shock, always turn the projector off and disconnect the power 
cord before changing the lamp.
• To reduce the risk of severe burns, allow the projector to cool for at least 45 minutes before 
replacing the lamp.
• To reduce the risk of injuries to fingers and damage to internal components, use caution 
when removing lamp glass that has shattered into sharp pieces.
• To reduce the risk of injuries to fingers and/or compromising image quality by touching the 
lens, do not touch the empty lamp compartment when the lamp is removed.
• This lamp contains mercury. Consult your local hazardous waste regulations to dispose of 
this lamp in a proper manner.
• To assure optimal performance from the projector, it is recommended that you purchase a 
BenQ projector lamp for lamp replacement.
• Ensure good ventilation when handling broken lamps. We recommend that you use 
respirators, safety glasses, goggles or face shield and wear protective clothing such as gloves.
1. Turn the power off and disconnect the projector from the wall socket. If the lamp is 
hot, avoid burns by waiting for approximately 45 minutes until the lamp has cooled.
2. Loosen the captive screw from the front.
3. Remove the lamp compartment cover as 
shown.
4. Loosen the three captive screws that 
secure the lamp.
• Do not turn the power on with the lamp 
cover removed.
• Do not insert your fingers between the lamp 
and the projector. The sharp edges inside the 
projector may cause injuries. 
						

							Maintenance 6610. Restart the projector.
Do not turn the power on with the lamp cover removed.
5. Lift the handle so that it stands up. Use 
the handle to slowly pull the lamp out of 
the projector.
• Pulling it too quickly may cause the lamp to 
break and scatter broken glass in the 
projector.
• Do not place the lamp in locations where 
water might splash on it, children can reach 
it, or near flammable materials.
• Do not insert your hands into the projector 
after the lamp is removed. If you touch the 
optical components inside, it could cause 
color unevenness and distortion of the 
projected images.
6. Insert the new lamp into the lamp 
compartment and make sure it fits in the 
projector.
• Ensure the connectors are aligned.
• If you experience resistance, lift the lamp and 
start again.
7. Tighten the screws that secure the lamp.
8. Ensure the handle is fully laid flat and 
locked in place.
• Loose screw may cause a bad connection, 
which could result in malfunction.
• Do not over tighten the screw.
9. Replace the lamp compartment cover on 
the projector
and tighten the captive 
screw. 
						

							Maintenance 67
Resetting the lamp timer
11. After the startup logo displays, resetting the lamp timer via the OSD menu.
• Under the Advanced OSD menu, go to System Setup : Advanced > Reset 
Lamp Timer, and select Reset.
• Under the Basic OSD menu, if there’s no signal connected to the projector, go 
to Reset Lamp Timer and select Reset; if there are signals connected, go to 
Settings > Reset Lamp Timer, and select Reset.
Do not reset if the lamp is not new or replaced as this could cause damage.
A Reset Successfully message displays to notify that the lamp time has been 
reset to 0. 
						

							Maintenance 68
Indicators 
Light
Status & DescriptionPow e rTe m pLamp
Pow e r  ev e n t s
Orange Off OffStand-by mode
Green
FlashingOff OffPowering up
Green Off OffNormal operation
Orange
FlashingOff OffProjector is cooling.
Lamp events
Off OffOrange 
FlashingThe lamp ignition is not lit up.
Off Off Red1. The projector needs 90 seconds to cool down. Or
2. Please contact your dealer for assistance.
Thermal events
Red Red Off
The fans are not 
working.The projector has shutdown 
automatically. If you try to re-start the 
projector, it will shutdown again. 
Please contact your dealer for 
assistance. RedRed
FlashingOff
Red Green Off
RedGreen
FlashingOff
Green Red OffTemperature 1 error (over limited temperature).
GreenRed
FlashingOffThermal sensor 1 open error.
Green Green OffThermal sensor 1 short error.
GreenGreen
FlashingOffThermal IC #1 I2C connection error.
Green Red RedThermal break error.
System events
Green Off Red
The projector has shutdown automatically. If you try to re-start 
the projector, it will shutdown again. Please contact your dealer 
for assistance. Red
FlashingOff Off
Red Off Red
Off Green RedLamp door is open. Please check if the lamp door is open or not 
closed properly.
Green Off OrangeLamp life exhausted.
Red Off OffDownload.
Off Red OffLAN download fail.
Off Green OffLAN download processing. 
						

							Troubleshooting 69
Troubleshooting 
ProblemCauseRemedy
The projector does 
not turn on.There is no power from the power 
cable.Plug the power cord into the AC inlet 
on the projector, and plug the power 
cord into the power outlet. If the power 
outlet has a switch, make sure that it is 
switched on.
Attempting to turn the projector on 
again during the cooling process.Wait until the cooling down process has 
completed.
The lamp cover is not securely attached. Correctly attach the lamp cover.
No picture.The video source is not turned on or 
connected correctly.Turn the video source on and check that 
the signal cable is connected correctly.
The projector is not correctly 
connected to the input signal device.Check the connection.
The input signal has not been correctly 
selected.Select the correct input signal with the 
SOURCE key on the projector or 
remote control.
Image is unstable.The connection cables are not securely 
connected to the projector or the signal 
source.Correctly connect the cables to the 
appropriate terminals.
Picture is blurred.The projection lens is not correctly 
focused.Adjust the focus of the lens using the 
focus ring.
The projector and the screen are not 
aligned properly.Adjust the projection angle and direction 
as well as the height of the unit if 
necessary.
The lens cover is still closed. Remove the lens cover.
Remote control 
does not work.The battery is out of power. Replace the battery with new one.
There is an obstacle between the 
remote control and the projector.Remove the obstacle.
You are too far away from the projector.Stand within 7 meters (23 feet) of the 
projector.
3D content does 
not display correctly.The 3D glasses are out of battery. Recharge the 3D glasses.
The settings in the 3D menu are not set 
correctly.Correctly set the settings in the 3D 
menu.
Your Blu-ray Disc is not in 3D format. Use a 3D Blu-ray Disc and try again.
The input source has not been correctly 
selected.Select the correct source with the 
SOURCE key on the projector or 
remote control. 
						

							Specifications
70
Specifications
Projector specifications 
All specifications are subject to change without notice.
Optical
Resolution
1080p
Display system Single-chip DLP™ system
Lens F/Number F = 2.42 to 3.05, f = 17.22 to 27.37 
mm
Lamp 260W lamp
Electrical
Power supplyAC100-240V, 3.5A
50-60 Hz (Automatic)
Power consumption 360W (Max); < 0.5W (Standby)
Mechanical
Weight 9.24 lbs
 (4.2 Kg)
Output terminals
Speaker
10 watt (peak-to-peak)
Audio signal output PC audio jack x 1
USB Type A 1.5A
3D Sync Out x 1
Control
USB Mini B Type
RS-232 serial control 9 pin x 1
IR receiver x 2
12V TRIGGER
12VDC (Max. 0.2 A) x 1
Input terminals
Computer input RGB inputD-Sub 15-pin (female) x 1
Video signal input VIDEORCA jack x 1
SD/HDTV signal input
Analog - Component RCA jack x 3
Digital - HDMI-1 x 1 HDMI-2/MHL x 1
Audio signal input Audio inPC audio jack x 1
RCA audio jack (L/R) x 1
Environmental Requirements
Operating temperature 0°C–40°C at sea level
Operating relative humidity 10%–90% (without condensation)
Operating altitude 0–1499 m at 0°C–35°C
1500–3000 m at 0°C–30°C (with 
High Altitude Mode on)