BenQ Projector MH741 User Manual

							Maintenance61
5. Loosen the two captive screws that 
secure the lamp.
• Do not turn the power on with the lamp 
cover removed.
• Do not insert your fingers between the 
lamp and the projector. The sharp edges 
inside the projector may cause injuries.
6. 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 the 
optical components inside, it could cause 
color unevenness and distortion of the 
projected images.
7. Insert the new lamp into the lamp 
compartment and make sure it fits in 
the projector.
• Ensure the connectors are aligned.
• If you experience resistance, lift the lamp 
and start again.
8. Tighten the screws that secure 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. 
						

							Maintenance 62
12. Restart the projector.
Do not turn the power on with the lamp cover removed.
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. 
10. Connect the lamp connector properly 
and place as drawing before lamp 
compartment cover installation back.
• Lamp connector must be installed flush 
with the connector base as shown in the 
image below. A gap between the lamp 
connector and the connector base will 
cause damage to the projector. The 
following images illustrate correct and 
incorrect lamp connector installations.
11. Replace the lamp compartment cover 
on the projector
and tighten the 
captive screw.
No gap Gap
Correct Incorrect 
						

							Maintenance63
Indicators 
LightStatus & Description
Pow e rTe m pLamp
Pow e r  ev e n t s
Orange Off OffStand-by mode
Green
FlashingOff Off
Powering up
Green Off OffNormal operation
Orange
FlashingOff Off
Projector is cooling.
Lamp events
Off Off Orange 
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 to re-start 
the projector, it will shutdown 
again. Please contact your dealer 
for assistance. Red Red
FlashingOff
Red Green Off
Red Green
FlashingOff
Green Red OffTemperature 1 error (over limited temperature).
Green Red
FlashingOff
Thermal sensor 1 open error.
Green Green OffThermal sensor 1 short error.
Green Green
FlashingOff
Thermal IC #1 I2C connection error.
Green Red RedThermal break error.
System events
Green Off Red
The projector has shutdown automatically. If you try to re-
start the projector, it will shutdown again. Please contact 
your dealer for assistance. Red
FlashingOff Off
Red Off Red
Off Green RedLamp door is open. Please check if the lamp door is open or 
not closed properly.
Green Off OrangeLamp life exhausted.
Red Off OffDownload. 
						

							Troubleshooting 64
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 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 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.
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 unit if necessary.
The lens cover is still closed. Open the lens cover.
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 30 for details. 
						

							Specifications65
Specifications
Projector specifications
All specifications are subject to change without notice. 
Optical
Resolution
MH741
1920 x 1080
Display system
Single-chip DLP™ system
Lens F/Number
F=2.59 to 2.91, f=16.87 to 21.87mm
Lamp
260W lamp
Electrical
Power supply
AC100-240V
50-60 Hz (Automatic)
3.5A
Power consumption
350W (Max); < 0.5W (Standby)
Mechanical
Weight
7.28 lbs (3.3 Kg)
Output terminals
Speaker
(Mono) 10 watt x 1
Audio signal output
PC audio jack x 1
Monitor Out
D-Sub 15-pin (female) x1
USB
TYPE-A (5V/1.5A)
Control
USB
MINI-B
RS-232 serial control
9 pin x 1
IR receiver x 2
Input terminals
PC input
RGB input
D-Sub 15-pin (female) x 1
Video signal input
S-VIDEO
Mini DIN 4-pin port x 1
VIDEO
RCA jack x 1
SD/HDTV signal input
Digital - HDMI-1 x 1
Digital - HDMI-2/MHL x 1
Audio signal input
Audio in
PC audio jack x 1
RCA audio jack (L/R) x 1
MIC
PC audio jack 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) 
						

							Specifications 66
Dimensions
314.2 mm (W) x 116 mm (H) x 216.3 mm (D)
314.2
216.3314.2
51.2116.065.2
45.6
76.0 109.0 71.090.5
537.9577.7636.9
81.8
314.2216.3
Ceiling Mount Installation*Ceiling Mount Screws:
  M4 (Max. L=25, Min. L=20)Unit: mm 
						

							Specifications67
Timing chart
Supported timing for PC input 
Resolution ModeRefresh
rate
(Hz)H-
frequency
(kHz)Clock
(MHz)3D Field
Sequential3D
over-
under3D
side-
by-side
800 x 600 640 x 480720 x 400
1024 x 768
1152 x 864
1024 x 576
1024 x 600
1280 x 720
1280 x 768
1280 x 800
1280 x 1024VGA_60
VGA_72
VGA_75
VGA_85 720 x 400_70
SVGA_60
SVGA_72
SVGA_75
SVGA_85
XGA_60
XGA_70
XGA_75
XGA_85
1152 x 864_75
BenQ NB Timing
BenQ NB Timing
1280 x 720_60
1280 x 768_60
WXGA_60
WXGA_75
WXGA_85
SXGA_60
SXGA_75
SXGA_85 SVGA_120
(Reduce Blanking)
XGA_120(Reduce Blanking)
WXGA_120(Reduce Blanking)
59.940
72.809
75.000
85.008 70.087
60.317
72.188
75.000
85.061
119.854
60.004
70.069
75.029
84.997
119.989
75.00
60.00
64.995
60
59.870
59.810
74.934
84.880
119.909
60.020
75.025
85.02431.469
37.861
37.500
43.269 31.469
37.879
48.077
46.875
53.674
77.425
48.363
56.476
60.023
68.667
97.551
67.500
35.820
41.467
45.000
47.776
49.702
62.795
71.554
101.563
63.981
79.976
91.14625.175
31.500
31.500
36.000 28.3221
40.000
50.000
49.500
56.250
83.000
65.000
75.000
78.750
94.500
115.500
108.000
46.996
51.419
74.250
79.5
83.500
106.500
122.500
146.25
108.000
135.000
157.500
èèè èèè
è
èèè
èèè
èèè
è
èèè
èè è 
						

							Specifications 68
There 3D timing showing depend the EDID file and VGA display card. It is possible that user 
cannot choose the above 3D timings on VGA display card.
Resolution ModeRefresh
rate
(Hz)H-
frequency
(kHz)Clock
(MHz)3D Field
Sequential3D
over-
under3D
side-
by-side
1280 x 960
1360 x 768
1440 x 900
1400 x 10501280 x 960_60
1280 x 960_85
1360 x 768_60
WXGA+_60
SXGA+_60
UXGA60.000
85.002
60.015
59.887
59.97860.000
85.938
47.712
55.935
65.317108
148.500
85.500
106.500
121.750
ÖÖ
ÖÖ
ÖÖ
ÖÖ
ÖÖ
1600 x 1200
1680 x 105060.000 75.000 162.000
MAC13 640 x 480
@67Hz66.667 35.000 30.240
MAC16  832 x 624
@75Hz74.546 49.722 57.280
MAC19 1024 x 768
@75Hz74.93 60.241 80.000
MAC21 1152 x 870
@75Hz75.06 68.68 100.00 1680 x 1050_60
ÖÖ59.954 65.290 146.250
1920x1080
@60Hz 1920 x 1080_60
(Reduce Blanking)60               67.5            148.5
1920x1200
@60Hz 1920 x 1200_60
(Reduce Blanking)59.95          74.038           154 
						

							Specifications69
Support timing for Component - YPbPr input 
Timing
480i
480p
576i
576p
720/50p
720/60p
1080/50i
1080/60i
1080/24p
1080/25p
1080/30p
1080/50p
1080/60pResolution
720 x 480
720 x 480
720 x 576
720 x 576
1280 x 720
1280 x 720
1920 x 1080
1920 x 1080
1920 x 1080
1920 x 1080
1920 x 1080
1920 x 1080
1920 x 1080Horizontal
frequency
(KHz)
15.73
31.47
15.63
31.25
37.5
45.00
28.13
33.75
27
28.13
33.75
56.25
67.5Vertical
Frequency
(Hz)
59.94
59.94
50
50
50
60
50
60
24
25
30
50
60Dot Clock
Frequency
(MHz)
13.5
27
13.5
27
74.253D Field
Sequential
74.25
74.25
74.25
74.25
74.25
74.25
148.5
148.5Ö
Ö
Ö 
						

							Specifications 70
Support timing for Video and S-Video input 
Support timing for HDMI (HDCP) input 
Video mode 
NTSC 
PAL 
SECAM 
PAL-M 
PAL-N 
PAL-60 
NTSC4.43 Horizontal
frequency
(KHz)
15.73 60 3.58Ö
15.63 50 4.43
15.63 50 4.25 or 4.41
15.73 60 3.58
15.63 50 3.58
15.73 60 4.43
15.73 60 4.43Vertical
Frequency
(Hz)Sub-carrier
Frequency
(MHz)3D Field
Sequential
Resolution ModeRefresh
rate
(Hz)H-
frequency
(kHz)Clock
(MHz)3D Field
Sequential3D
over-
under3D
side-
by-side
640 x 480
720 x 400
800 x 600
1024 x 768
1152 x 864
1024 x 576
1024 x 600
1280 x 720VGA_60
VGA_72
VGA_75
VGA_85
720 x 400_70
SVGA_60
SVGA_72
SVGA_75
SVGA_85
XGA_60
XGA_70
XGA_75
XGA_85
1152 x 864_75
BenQ 
Notebook Timing
BenQ 
Notebook Timing
1280 x 720_60SVGA_120
(Reduce Blanking)
XGA_120(Reduce Blanking)
59.940
72.809
75.000
85.008
70.087
60.317
72.188
75.000
85.061
119.854
60.004
70.069
75.029
84.997
119.989
75.00
60.00
64.995
6031.469
37.861
37.500
43.269
31.469
37.879
48.077
46.875
53.674
77.425
48.363
56.476
60.023
68.667
97.551
67.500
35.820
41.467
45.00025.175
31.500
31.500
36.000
28.3221
40.000
50.000
49.500
56.250
83.000
65.000
75.000
78.750
94.500
115.500
108.000
46.996
51.419
74.250
ÖÖÖ ÖÖÖ
Ö
ÖÖÖ
ÖÖÖ
Ö