BenQ Mw821st Digital Projector User Manual

Maintenance 51 Resetting the lamp timer
13. 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 replaced as this could cause damage.  

Maintenance 52
Indicators
LightStatus & Description
Powe r  ev e n t s
Orange Off OffStand-by mode.
Green
FlashingOff OffPowering up.
Green Off OffNormal operation.
Orange
FlashingOff OffNormal power-down cooling
Red Off OffDownload
Green Off RedCW start fail
Red Flashing Off OffScaler shutdown fail (data abord)
Red Off RedScaler reset fail (video projector only)
Off Red OffLAN download fail
Off Green OffLAN download processing
Green Off OffBurn-in ON
Green Green GreenBurn-in OFF
Lamp events
Off Off...

Troubleshooting 53
Troubleshooting
The projector does not turn on.
No picture
Blurred image
Remote control does not work
The password is incorrect
CauseRemedy
There is no power from the power cord.Plug the power cord into the AC power jack 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....

Specifications
54
Specifications
Projector specifications
All specifications are subject to change without notice.
Optical
Resolution
1280 x 800 WXGA
Display system 1-CHIP DMD
Lens F/Number F = 2.6, f = 6.9 mm
Lamp
210 W lamp
Electrical
Power supplyAC100–240V, 3.5 A, 50-60 Hz 
(Automatic)
Power consumption 303 W (Max); < 0.5 W (Standby)
Mechanical
Weight2.9 Kg (6.39 lbs)
Output terminals
RGB output
D-Sub 15-pin (female) x 1
Speaker (Stereo) 10 watt x 1
Audio signal output PC audio jack x 1
Control
RS-232...

Specifications 55
Dimensions
311.81 mm (W) x 113.04 mm (H) x 244.12 mm (D)
Wall mount installation
311.81
244.12
113.04
60.65
58.2
Computer Resolution: 
WXGA 
Image Resolution: WXGADiagram 
ReferenceSMART 
Board 
685Promethean 
ActivBoard 
387Hitachi 
FX-TRIO-
88WHitachi 
FX-DUO-
88W
Image Diagonal (inches)D87 87 88 88
Image Height (mm)H 1171 1171 1181 1181
Image Width (mm)W 1874 1874 1887 1887
Distance from floor to 
bottom of image (mm)f 900 900 900 900
Distance from screen surface 
to projector lens...

Specifications 56
Minimum Ceiling Height (mm) = f + H + b + 60 + 274+ c
•  The dimensions are based on the BenQ wall mount (P/N: 5J.J4R10.001).
•  All measurements are approximate and may vary from the actual sizes. BenQ recommends that if you 
intend to permanently install the projector, you should physically test the projection size and distance 
using the actual projector in situ before you permanently install it, so as to make allowance for this 
projectors optical characteristics. This will help you...

Specifications 57
Timing chart
Supported timing for PC input
•  *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.
ResolutionMode
Ve r t i c a l  
Frequency 
(Hz)Horizontal 
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...

Specifications 58
•  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.
Supported timing for HDMI (HDCP) input
•  *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.
ResolutionModeVe r t i c a l  
Frequency 
(Hz)Horizontal 
Frequency...

Specifications 59
•  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.
*Supported timing for 3D signal with Frame Sequential format.
**Supported timing for 3D signal with Top Bottom and Frame Packing format.
***Supported timing for 3D signal with Side by Side format.
Supported timing for Component-YPbPr input
•  *Supported timing for 3D signal with Frame Sequential format.
•  Displaying a 1080i(1125i)@60Hz...

Warranty and Copyright information 60
Warranty and Copyright information
Limited warranty
BenQ warrants this product against any defects in material and workmanship, under 
normal usage and storage.
Proof of purchase date will be required with any warranty claim. In the event this product 
is found to be defective within the warranty period, BenQs only obligation and your 
exclusive remedy shall be replacement of any defective parts (labor included). To obtain 
warranty service, immediately notify the...