BenQ Mx819st Users Manual

							Maintenance 51 14. Connect the power and restart the projector.
Do not turn the power on with the lamp cover removed. 
Resetting the lamp timer
15. 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 is displayed 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. 
13. Tighten the screw(s) that secures the lamp 
cover.
•  Loose screw may cause a bad connection, which could 
result in malfunction.
•  Do not over tighten the screw.
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							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 abort)
Red Red OffLAN download fail
Red Green OffLAN download processing
Green Off OffBurn-in ON
Green Green GreenBurn-in OFF
Lamp events
Off Off RedLamp1 error in normal operation
Off OffRed 
FlashingLamp is not lit up
Thermal events
Red Red OffFan 1 error (the actual fan speed is +25% outside 
the desired speed)
RedRed 
FlashingOffFan 2 error (the actual fan speed is +25% outside 
the desired speed)
Green Red OffTemperature 1 error (over limited temperature)
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							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.
CauseRemedy
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.
The lens cover is still closed. Open the lens cover.
CauseRemedy
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 projector if necessary.
The lens cover is still closed. Open the lens cover.
CauseRemedy
The battery is out of power. Replace the battery 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 feet) of the projector.
CauseRemedy
You do not remember the password.Please see Entering the password recall 
procedure on page 24 for details.
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							Specifications 54
Specifications
Projector specifications
All specifications are subject to change without notice.
Optical
Resolution
(MX819ST/TS819ST)
1024 x 768 XGA
(MW820ST/TW820ST)
1280 x 800 WXGA
Display system
1-CHIP DMD
Lens F/Number
F = 2.6
Lamp
190 W lamp
Electrical
Power supply
AC100–240V, 2.8 A, 50-60 Hz (Automatic)
Power consumption
280 W (Max); < 0.5 W (Standby)
Mechanical
Weight
2.6 Kg (5.73 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 serial control
9 pin x 1
LAN control
RJ45 x 1
IR receiver x 2
USB port (Mini-B x 1)
Input terminals
Computer input
RGB input
D-Sub 15-pin (female) x 2
Video signal input
S-VIDEO
Mini DIN 4-pin port x 1
VIDEO
RCA jack x 1
SD/HDTV signal input
Analog - Component RCA jack x 3
(through RGB input)
Digital - HDMI V1.4 x 1
Audio signal input
Audio in
PC audio jack x 2
RCA audio jack (L/R) x 2
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)
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							Specifications 55
Dimensions
Ceiling mount installation
232.6
114.4
6262
Unit: mm 287.3
625.6
577.7
537.9
83.39
142.89241.35 127.74 68.27285.78
25
77
76.5
127.7
199.6 8
Ceiling Mount screw: M4
(Max L = 25 mm; Min L = 20 mm)
Unit: mm
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							Specifications 56
Wall mount installation
Minimum installation requirements
Computer 
Resolution: 
XGA 
Image 
Resolution: 
XGA
Diagram 
ReferenceSMART 
Board 
660Smart 
Board 
680Promethean 
ActivBoard 
164Promethean 
ActivBoard 
178RM 
ClassBoard2 
77.5Hitachi 
StarBoard 
FX-63StarBoard 
FX-77
Image 
Diagonal 
(inches)D6477 64 78 78 63 77
Image 
Height 
(mm)H 975 1173 975 1189 1181 960 1173
Image 
Width 
(mm)W 1300 1565 1300 1585 1575 1280 1565
Distance 
from floor 
to bottom 
of image 
(mm)
f 900 900 900 900 900 900 900
Distance 
from 
screen 
surface to 
projector 
rear case 
(mm)
a 790 950 790 970 970 780 950
Distance 
from top 
case to the 
top of 
image 
(mm)
b 94 124 94 126 126 92 124
Distance 
from top of 
wall mount 
to ceiling 
(mm)
c505050 50 50 5050
Minimum 
Ceiling 
Height 
(mm)
e 2347 2575 2347 2593 2585 2330 2575
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							Specifications 57
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 (mm)a 916 916 926 926
Distance from top case to 
the top of image (mm)b 6.8 6.8 7.5 7.5
Distance from top of wall 
mount to ceiling (mm)c50 50 50 50
Minimum Ceiling Height 
(mm)e 2461.8 2461.8 2472.5 2472.5
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							Specifications 58
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 determine the exact mounting position so that it best 
suits your installation location.
•  The dimensions supplied are offered as a guide only and may differ depending on several factors relating to 
any specific installation.
•  The dimensions are based on the projector being configured with zero keystone correction.
•  The dimensions assume that the wall mount arm is positioned 90° from the bottom case of projector and 
screen surface.
2060
150180
60
c
ba
H
W D
f
e274
232.6
Ceiling
floor Distance from floor to 
bottom of image
screenProjection 
area
Wall plate
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							Specifications 59
Timing chart
Supported timing for PC input
•  *Supported timing for 3D signal with Frame Sequential, Top Bottom and Side by Side formats.
**Supported timing for 3D signal with Frame Sequential format.
***Supported timing for 3D signal with Top Bottom and Side by Side formats.
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 36.000 
720 x 400 720 x 400_70 70.087 31.469 28.3221
SVGA_60* 60.317 37.879 40.000 
800 x 600SVGA_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 97.551 115.5
1152 x 864 1152 x 864_75 75 67.5 108
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
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 1680x1050_60*** 59.954 65.29 146.25
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
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							Specifications 60
•  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 formats.
**Supported timing for 3D signal with Frame Sequential format.
***Supported timing for 3D signal with Top Bottom and Side by Side formats.
•  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.
ResolutionModeVe 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 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 97.551 115.5
1152 x 864 1152 x 864_75 75 67.5 108
1280 x 768 1280 x 768_60* 59.87 47.776 79.5
1024 x 576@60Hz BenQ Notebook Timing 60.00 35.820 46.996
1024 x 600@65Hz BenQ Notebook Timing 64.995 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
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 1680x1050_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
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