BenQ Projector HT1075 User Manual

							  51
  Maintenance
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. Turn 
the power off and let the projector cool for 45 minutes. If the Lamp or Temp indicator still lights up after 
turning the power back on, please contact your dealer. See Indicators for details.
Please replace the lamp when the following lamp warning messages appear.
The illustrations show the examples of messages you will see under the Advanced menu. They are for 
reference only and may differ from the actual design and the menu type you’ve selected.
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 
operates normally in Economic mode (see Getting to 
know the lamp hour), you may continue operating the 
projector until the next hour lamp warning appears.
Press OK to dismiss the message.
We strongly recommend you to replace the lamp at this 
stage. 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.
OK
NOTICE: Order replacement 
lamp
Lamp > XXXX hrs
Order a new lamp at 
www.benq.com
WARNING
NOTICE: Replace lamp soon
Lamp > XXXX hrs
Order a new lamp at 
www.benq.com
WARNING
OK
NOTICE: Replace lamp now
Lamp > XXXX hrs
Lamp-usage time exceeded
Replace lamp (refer to User’s Manual) 
then reset lamp timer.
Order a new lamp at 
www.benq.com
WARNING
OK 
						

							52 Maintenance  
Replacing the lamp
•  To reduce the risk of electrical shock, always turn the projector off and disconnect the power cable 
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 qualified 
projector lamp for lamp replacement.
•  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.
•  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 power outlet. If the lamp is hot, avoid 
burns by waiting for approximately 45 minutes until the lamp has cooled.
2. Loosen the screw that secures the lamp cover on the side of 
the projector until the lamp cover loosens.
3. Remove the lamp cover from the projector.
•  Do not turn the power on with the lamp cover removed.
•  Do not insert your fingers between the lamp and the projector 
as the sharp edges inside the projector may cause injuries.
4. Loosen the screw that secures the lamp.
5. Lift the handle so that it stands up.
6. 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.
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1 
						

							  53
  Maintenance
7. As shown in the illustration, lower the new lamp.
8. Tighten the screw that secures the lamp.
9. 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.
10. Replace the lamp cover on the projector.
11. Tighten the screw that secures the lamp cover. 
•  Loose screw may cause a bad connection, which could result in 
malfunction.
•  Do not over tighten the screw.
12. Connect the power and restart the projector.
13. 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.
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							54 Maintenance  
Indicators
There are three indicators which show the status of the projector. Check the following information 
about the indicator lights. If there is anything wrong, turn the projector off and contact your dealer.
•  When the projector is in a normal state
•  When the projector is in an abnormal state
Status & Description
Orange Off OffStand-by mode
Green
FlashingOff OffPowering up
Green Off OffNormal operation
Orange
FlashingOff Off
•  The projector needs 90 seconds to cool down as it was 
abnormally shut down without the normal cooling down 
process.
•  The projector needs to cool for 90 seconds after the power 
is turned off.
Status & Description
Off Off Red•  The lamp has been damaged. Please contact your local BenQ 
customer center for purchasing a new lamp.
Off OffRed 
Flashing
•  The lamp is not properly attached.
•  The lamp has been damaged. Please contact your local BenQ 
customer center for purchasing a new lamp.
Off OffOrange 
FlashingThe lamp is not lit up.
Green Off OrangeThe lamp life exhausted. Please contact your local BenQ 
customer center for purchasing a new lamp.
Red Red Off
The fans are not working.The projector has shut down 
automatically. If you try to re-
start the projector, it will shut 
down again. Please contact 
your dealer for assistance.
RedRed 
FlashingOff
Red Green Off
RedGreen 
FlashingOff
Green Red Off
The internal temperature is too high.
•  The intake ventilation or the exhaust ventilation is blocked.
•  The projector may be in a poorly ventilated location.
•  The ambient temperature may be too high. 
						

							  55
  Maintenance
Troubleshooting
ProblemCauseRemedy
The projector does 
not turn on.There is no power from the power 
cable.Plug the power cable into the AC inlet on the 
rear of the projector, and plug the power 
cable into to 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 source device.Check the connection. 
The input source has not been 
correctly selected.Select the correct source 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 this projector if 
necessary.
The lens cover is still closed. Remove the lens cover.
Remote control does 
not work correctly.The batteries are out of power. Replace both of the batteries with new ones. 
There is an obstacle between the 
remote control and the projector.Remove the obstacle. 
You are too far away from the 
projector.Stand within 8 meters (26.2 feet) of the 
projector. 
3D content does not 
not display correctlyThe 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.  
						

							56 Maintenance  
Specifications
Projector specifications
All specifications are subject to change without notice. 
Optical
Resolution
1920 (H) x 1080 (V)
Display system
Single-chip DLP
TM system
Lens F/Number
F = 2.59 to 2.87, f = 16.88 to 21.88 mm 
(HT1075) 
F = 2.6 to 2.78, f = 10.2 to 12.24 mm
(HT1085ST)
Lamp
240 W lamp
Electrical
Power supply
AC100–240V, 3.5 A, 50-60 Hz (Automatic)
Power consumption
375 W (Max); < 0.5 W (Standby)
Mechanical
Weight
2.75 Kg (6.06 lbs) (HT1075)
2.85 Kg (6.28 lbs) (HT1085ST)
Output terminals
Speaker
(Stereo) 10 watt x 1
Audio signal output
PC audio jack x 1
Control
RS-232 serial control
9 pin x 1
IR receiver x 2
12VDC (Max. 0.5 A) x 1
Input terminals
Computer input
RGB input
D-Sub 15-pin (female) x 1
Video signal input
VIDEO
RCA jack x 1
SD/HDTV signal input
Analog - Component RCA jack x 3
(through RGB input)
Digital - HDMI x 1
Digital - HDMI/MHL x 1
Audio signal input
Audio in
RCA audio jack (L/R) x 2
PC audio jack x 1
USB port (Type-A x 1; Mini-B 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) 
						

							  57
  Maintenance
Dimensions
311.87 mm x 244.12 mm x 104 mm (W x D x H)
Ceiling mount installation
Unit: mm 244.12311.87
104
625.95
577.7
537.9
95.33
163.12
244.12 102.97      
43.55
311.95
137
160
46.21 115
80
Ceiling mount screws: M4 
(Max. L = 25 mm; Min. L= 20 mm)
Unit: mm 
						

							58 Maintenance  
Timing chart
Supported timing for PC input
FormatResolutionRefresh rate 
(Hz)H. Frequency 
(KHz)Pixel 
Frequency 
(MHz)
720 x 400 720 x 400_70 70.087 31.469 28.3221
640 x 480VGA_60* 59.940 31.469  25.175 
VGA_72 72.809 37.861  31.500 
VGA_75 75.000 37.500  31.500 
VGA_85 85.008 43.269  36.000 
800 x 600SVGA_60* 60.317 37.879  40.000 
SVGA_72 72.188 48.077  50.000 
SVGA_75 75.000 46.875  49.500 
SVGA_85 85.061 53.674  56.250 
SVGA_120** 
(Reduce Blanking)119.854 77.425 83.000
1024 x 768XGA_60* 60.004 48.363  65.000 
XGA_70 70.069 56.476  75.000 
XGA_75 75.029 60.023  78.750 
XGA_85 84.997 68.667  94.500 
XGA_120** 
(Reduce Blanking)119.989 97.551 115.500
1152 x 864 1152 x 864_75 75.00 67.500 108.000
1024 x 576BenQ Notebook 
Timing60.0 35.820 46.966
1024 x 600BenQ Notebook 
Timing64.995 41.467 51.419
1280 x 720 1280 x 720_60* 60 45.000 74.250
1280 x 768 1280 x 768_60* 59.870 47.776 79.5
1280 x 800WXGA_60* 59.810 49.702 83.500
WXGA_75 74.934 62.795 106.500
WXGA_85 84.880 71.554 122.500
WXGA_120** 
(Reduce Blanking)119.909 101.563 146.25 
						

							  59
  Maintenance *Supported timing for 3D signal with Frame Sequential, Top-Bottom and Side-by-Side format.
**Supported timing for 3D signal with Frame Sequential format.
***Supported timing for 3D signal with Top-Bottom and Side-by-Side format.
The timings showing above may not be supported due to EDID file and VGA graphic card limitations. It is 
possible that some timings cannot be chosen.1280 x 1024SXGA_60*** 60.020 63.981 108.000 
SXGA_75 75.025 79.976 135.000
SXGA_85 85.024 91.146 157.500
1280 x 9601280 x 960_60*** 60.000 60.000 108
1280 x 960_85 85.002 85.938 148.500
1360 x 768 1360 x 768_60*** 60.015 47.712 85.500
1440 x 900 WXGA+_60*** 59.887 55.935 106.500
1400 x 1050 SXGA+_60*** 59.978 65.317 121.750
1600 x 1200 UXGA*** 60.000 75.000  162.000
1680 x 1050 1680 x 1050_60*** 59.954 65.290 146.250
640 x 480@67Hz MAC13 66.667 35.000 30.240
832 x 624@75Hz MAC16 74.546 49.722 57.280
1024 x 768@75Hz MAC19 74.93 60.241 80.000
1152 x 870@75Hz MAC21 75.06 68.68 100.00 
						

							60 Maintenance  
Supported timing for HDMI (HDCP) input
FormatResolutionRefresh rate 
(Hz)H. Frequency 
(KHz)Pixel 
Frequency 
(MHz)
640 x 480VGA_60* 59.940 31.469 25.175 
VGA_72 72.809 37.861 31.500 
VGA_75 75.000 37.500 31.500 
VGA_85 85.008 43.269 36.000 
720 x 400 720 x 400_70 70.087 31.469 28.3221
800 x 600SVGA_60* 60.317 37.879 40.000 
SVGA_72 72.188 48.077 50.000 
SVGA_75 75.000 46.875 49.500 
SVGA_85 85.061 53.674 56.250 
SVGA_120** 
(Reduce Blanking)119.854 77.425 83.000
1024 x 768XGA_60* 60.004 48.363 65.000 
XGA_70 70.069 56.476 75.000 
XGA_75 75.029 60.023 78.750 
XGA_85 84.997 68.667 94.500 
XGA_120**
(Reduce Blanking)119.989 97.551 115.500
1152 x 864 1152 x 864_75 75.00 67.500 108.000
1024 x 576BenQ Notebook 
Timing60.00 35.820 46.996
1024 x 600BenQ Notebook 
Timing64.995 41.467 51.419
1280 x 720 1280 x 720_60* 60 45.000 74.250
1280 x 768 1280 x 768_60* 59.870 47.776 79.5
1280 x 800WXGA_60* 59.810 49.702 83.500
WXGA_75 74.934 62.795 106.500
WXGA_85 84.880 71.554 122.500
WXGA_120** 
(Reduce Blanking)119.909 101.563 146.25
1280 x 1024SXGA_60*** 60.020 63.981 108.000 
SXGA_75 75.025 79.976 135.000
SXGA_85 85.024 91.146 157.500