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...

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...

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...

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...

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...

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...

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...

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...

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...

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...