BenQ Mp721c Users Manual

							Maintenance 47
Lamp information
Calculation of lamp hour
When the projector is in operation, the duration (in hours) of lamp usage is automatically 
calculated by the built-in timer. The method of calculating the equivalent lamp hour is as 
follows:
Total (equivalent) lamp hour
=  (hours used in Economic mode) + 4/3 (hours used in normal mode)
See Economic Mode (off) on page 44 for more information on Economic mode.
The lamp hour in Economic mode is calculated as 2/3 of that in normal mode. That is, using 
the projector in Economic mode helps to extend the lamp life by 1/3.
Warning message
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.
For more detailed information on projector warnings, please refer to Indicators on page 
51.
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.
The following Lamp warning displays will remind you to change the lamp.
MessageStatus
Total (equivalent) lamp hour has reached 3000 hours. 
Install a new lamp for optimal performance. 
Total (equivalent) lamp hour has reached 3950 hour. 
A new lamp should be fitted to avoid the 
inconvenience when the projector runs out of lamp 
time.
Lamp > 3000 Hours Notice: Order replacement lamp
Projector will stop at 4000 hours
Lamp > 3950 Hours Notice: Replace lamp soon
Projector will stop at 4000 hours
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							Maintenance 48
Replacing the lamp
• To reduce the risk of electrical shock, always turn the projector off and disconnect the 
power cord 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.
1. Turn the power off and disconnect the projector from the wall socket. If the lamp is 
hot, avoid burns by waiting for approximately 45 minutes until the lamp has cooled. Total (equivalent) lamp hour has reached 4000 hours. 
This message will flash in the center of the screen for 
about 30 seconds together with the Lamp indicator 
lighting up red for 40 seconds.
It is strongly recommended that you replace the lamp 
at this age. The lamp is a consumable item. With the 
usage time increase, the lamp brightness diminished 
gradually. This is normal lamp behaviour. You can 
replace the lamp whenever you notice that the 
brightness level has significantly diminished. If the 
lamp is not replaced beforehand, it must be replaced 
after 4000 hours usage.
If this warning message displays, the projector will 
shut down in 40 seconds. The lamp MUST be 
replaced before the projector will operate normally.
Lamp > 4000 Hours Notice: Replace lamp now
Lamp usage time exceeded
Lamp usage time exceeded
Replace lamp (refer to User Manual)
Then reset the lamp usage timer
2. Turn the projector over. Then loosen the 
screws on the lamp cover. 
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							Maintenance 49 3. Remove the lamp cover from the projector.
Do not turn the power on with the lamp cover 
removed.
4. Remove the lamp cords from the slots.
5. Disconnect the lamp connector by pushing it 
against the projector while pulling it up.
6. Loosen the screw that secures the lamp.
7. 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.
8. As shown in the figure, lower the new lamp 
first and align the two holes on the lamp with 
the locators on the projector.
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							Maintenance 5014. Restart the projector.
Do not turn the power on with the lamp cover removed. 
15. Resetting the lamp counter 
Do not reset if the lamp is not replaced as this could cause 
damage. 
i. Press and hold the Exit 5 button on the 
projector for 5 seconds to display the total used 
lamp time.
ii. Press Auto on the projector or on the remote 
control to reset the lamp hour to “0”.
iii. Wait about 5 seconds to let the OSD disappear.
Temperature information
When the Temperature warning light is on, it is warning you of the following possible 
problems:
1. The internal temperature is too high.
2. The fans are not working.
Turn the projector off and contact qualified service personnel for further help. For more 
detailed information, please refer to Indicators on page 51. 9. Tighten the screw that secures the lamp.
• Loose screw may cause a bad connection, 
which could result in malfunction.
• Do not over tighten the screw.
10. Connect the lamp connector to the projector.
11. Place the lamp cords back to the slots.
12. Replace the lamp cover on the projector.
13. 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.
0  Hours
Press Auto To Reset Lamp usage timer reset
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							Maintenance 51
Indicators
Illustration
•Blank -: Light OFF
•O: Orange light
•: Light flashing•R: Red light
•: Light ON•G: Green light
LightStatus & Description
PowerTe m pLamp
Power events
The projector has just been connected to a power outlet.
--Stand-by mode.
--Powering up.
--Normal operation.
--
1. The projector needs 90 seconds to cool down as it was 
abnormally shut down without the normal cooling down 
process. Or
2. The projector needs to cool for 90 seconds after the 
power is turned off.
--The projector has shutdown automatically. If you try to re-start 
the projector, it w ill shutdow n again. Please contact your dealer 
for assistance.
Lamp events
-The projector has shutdown automatically. If you try to re-start 
the projector, it w ill shutdow n again. Please contact your dealer 
for assistance.
--1. The projector needs 90 seconds to cool down. Or
2. Please contact your dealer for assistance.
  
  
O OO
O 
 G 
 G 
O 
O 
O  R
 R
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							Maintenance 52
LightStatus & Description
PowerTe m pLamp
Thermal events
--
The projector has shutdown automatically. If you try to re-start 
the projector, it will shutdown again. Please contact your dealer 
for assistance.
-
-
-
-
 R 
 R  R
 R  G
 R O
 R  R  R
 R  R  G
 R  R O
 G  R  R
 G  R  G
 G  R O
O  R  R
O  R  G
O  R O
 G  R
 G  G
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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 
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 source 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 cap is still attached to the 
lens.Remove the lens cap.
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 cap is still attached to the 
lens.Remove the lens cap.
CauseRemedy
The battery is out of power. Replace the battery with a 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 6 meters (19.5 feet) of the 
projector.
CauseRemedy
You do not remember the password.Please see Entering the password recall 
procedure on page 27 for details.
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							Specifications 54
Specifications
Projector specifications 
All specifications are subject to change without notice. 
General
Product name Digital Projector
Model name MP721/MP721c
Optical
Resolution 1024 x 768 XGA
Display system 1-CHIP DMD
Lens F/Number F=2.6 to 2.77, f= 20.4 to 23.5 mm
Lamp 200W lamp
Electrical
Power supply AC100–240V, 4.0A, 50–60 Hz (Automatic)
Power consumption 285W (Max)
Mechanical
Dimensions 278 mm (W) x 94 mm (H) x 219.5 mm (D)
Weight 5.9 lbs (2.67 Kg)
Input terminal
Computer input
     RGB input D-sub 15-pin (female) x 1
     DVI-I input (Using DVI-A signal)
Video signal input
     S-VIDEO Mini DIN 4-pin port x 1
     VIDEO RCA jack x1
HDTV signal input D-sub  Component RCA jack x3, through RGB input
Audio signal input
     Audio in Mini jack stereo port
Output
RGB output D-sub 15-pin (female) x 1
USB mouse connector  A/B series x 1
Speaker  (mixed mono) 2 watt 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
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							Specifications 55
Timing chart
Supported timing for PC input
Supported timing for Component-YP
bPr input
Supported timing for Video and S-Video inputs
ResolutionHorizontal 
Frequency 
(kHz)Ve r t i c a l  
Frequency 
(Hz)Pixel 
Frequency 
(MHz)Mode
640 x 48031.469 59.940 25.175 VGA_60
37.861 72.809 31.500 VGA_72
37.500 75.000 31.500 VGA_75
43.269 85.008 36.000 VGA_85
720 x 400 31.469 70.087 28.3221 720 x 400_70
800 x 60037.879 60.317 40.000 SVGA_60
48.077 72.188 50.000 SVGA_72
46.875 75.000 49.500 SVGA_75
53.674 85.061 56.250 SVGA_85
1024 x 76848.363 60.004 65.000 XGA_60
56.476 70.069 75.000 XGA_70
60.023 75.029 78.750 XGA_75
68.667 84.997 94.500 XGA_85
1280 x 768 47.77 60.09 80.768 SXGA_60
1280 x 800 49.65 59.96 83.458 SXGA_60
1280 x 1024 63.981 60.020 108.000 SXGA_60
Signal FormatHorizontal 
Frequency (kHz)Vertical Frequency 
(Hz)
480i(525i)@60Hz 15.73 59.94
480p(525p)@60Hz 31.47 59.94
576i(625i)@50Hz 15.63 50.00
576p(625p)@50Hz 31.25 50.00
720p(750p)@60Hz 45.00 60.00
720p(750p)@50Hz 37.50 50.00
1080i(1125i)@60Hz 33.75 60.00
1080i(1125i)@50Hz 28.13 50.00
Video modeHorizontal 
Frequency 
(kHz)Ve r t i c a l  
Frequency 
(Hz)Color sub-
carrier 
Frequency 
(MHz)
NTSC 15.73 60 3.58
PAL 15.63 50 4.43
SECAM 15.63 50 4.25 or 4.41
PAL-M 15.73 60 3.58
PAL-N 15.63 50 3.58
PAL-60 15.73 60 4.43
NTSC4.43 15.73 60 4.43
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							Specifications 56
Dimensions
278 mm (W) x 94 mm (H) x 219.5 mm (D)
Unit: mm 
219.5
278
 94
64.3
53
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