BenQ Projector MX852UST+ User Manual

Maintenance71
10. Restart the projector.
Do not turn the power on with the lamp cover removed.
Resetting the lamp timer
11. After the startup logo, open the On-Screen Display (OSD) menu. Go to 
the SYSTEM SETUP: Advanced > Lamp Settings menu. Press 
MODE/ENTER. The Lamp Settings page displays. Highlight Reset 
lamp timer. A warning message displays asking if you want to reset the 
lamp timer. Highlight Reset and press MODE/ENTER. The lamp time 
will be reset to 0.
Do not reset if the lamp is not new or...

Maintenance 72
Cleaning the projector mirror 
Remove dust with a “Bellows/Lens Blower” readily available from Camera 
shops to prevent scratching the mirror when subsequently wiped.
•  Always turn the projector off and allow to cool for at least 30 
minutesprior to cleaning.
•  Never touch the projector mirror or Lens directly by hand. 

Maintenance73
Indicators 
LightStatus & Description
Pow 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 Off Orange 
FlashingThe lamp ignition is not lit up.
Off Off Red
1. The projector needs 90 seconds to cool down. 
Or
2. Please contact your dealer for assistance.
Thermal events
Red Red Red
The fans are not 
working.The projector has shutdown 
automatically. If you...

Troubleshooting 74
Troubleshooting
The projector does not turn on. 
No picture 
Blurred image 
CauseRemedy
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.
CauseRemedy
The video source is not turned 
on or connected...

Troubleshooting75
Remote control does not work 
The password is incorrect 
CauseRemedy
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.
CauseRemedy
You do not remember the 
password.Please see Entering the password recall 
procedure on page 33 for details. 

Specifications
76
Specifications
Projector specifications
All specifications are subject to change without notice. 
Optical
Resolution
MX852UST+ 1024 x 768 XGA
MW853UST+ 1280 x 800 WXGA
Display system Single-chip DLP™ system
Lens F/Number F = 2.5, f = 5.1 mm
Clear focus range 0.28m~0.45m (from IO to screen) 
Lamp 230W lamp
Electrical
Power supplyAC100-240V, 3.5A
50-60 Hz (Automatic)
Power consumption 320W (Max); < 0.5W (Standby)
Mechanical
Weight11 lbs (5 Kg)
Output terminals
Speaker10 watt x 2
Audio...

Specifications77
Timing chart
Supported timing for PC input
ResolutionFormatRefresh rate 
(Hz)H- frequency 
(kHz)Pixel Frequency 
(MHz)
720 x 400 720 x 400_70 70.087 31.469 28.3221
640 x 480 VGA_60* 59.94 31.469 25.175
VGA_72 72.809 37.861 31.5
VGA_75 75 37.5 31.5
VGA_85 85.008 43.269 36
800 x 600 SVGA_60* 60.317 37.879 40
SVGA_72 72.188 48.077 50
SVGA_75 75 46.875 49.5
SVGA_85 85.061 53.674 56.25
SVGA_120** 
(Reduce Blanking) 119.854 77.425 83
1024 x 768 XGA_60* 60.004 48.363 65
XGA_70 70.069 56.476 75...

Specifications
78
* Supported timing for 3D signal wit h 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 1024
SXGA_60*** 60.02 63.981 108
SXGA_75 75.025 79.976 135
SXGA_85 85.024 91.146 157.5
1280 x...

Specifications79
Support timing for Component - YPbPr input 
* Supported timing for 3D signal with Frame Sequential format.
Support timing for Video input
* Supported timing for 3D signal with Frame Sequential format.
Format Resolution Refresh rate 
(Hz)H- frequency 
(kHz) Pixel Frequency 
(MHz)
480i* 720 x 480 59.94 15.73 13.5
480p* 720 x 480 59.94 31.47 27
576i 720 x 576 50 15.63 13.5
576p 720 x 576 50 31.25 27
720/50p 1280 x 720 50 37.5 74.25
720/60p* 1280 x 720 60 45 74.25
1080/50i 1920 x 1080 50...

Specifications
80
Support timing for HDMI (HDCP) input
Resolution Format Refresh rate 
(Hz) H- frequency 
(kHz) Pixel Frequency 
(MHz)
640 x 480 VGA_60* 59.94 31.469 25.175
VGA_72 72.809 37.861 31.5
VGA_75 75 37.5 31.5
VGA_85 85.008 43.269 36
720 x 400 720 x 400_70 70.087 31.469 28.3221
800 x 600 SVGA_60* 60.317 37.879 40
SVGA_72 72.188 48.077 50
SVGA_75 75 46.875 49.5
SVGA_85 85.061 53.674 56.25
SVGA_120** 
(Reduce Blanking) 119.854 77.425 83
1024 x 768 XGA_60* 60.004 48.363 65
XGA_70 70.069 56.476 75...