BenQ Pb8250 Digital Projector Installation Series Users Manual

							Maintenance 35 4. Use a small vacuum cleaner designed for computers 
and other office equipment to clean the filters. Or 
use a soft brush (such as a clean artist’s paintbrush) 
to gently sweep the dust away.
If the dirt is difficult to remove or the filters are 
broken, contact your place of purchase to replace 
them.
5. Replace the filters then press the covers back until 
they click into place.
If the covers are not correctly seated in place, you 
will be reminded by a message displayed on the 
screen every three minutes. The projector will 
automatically shut down after 10th minutes if there 
has been no further action taken. Re-install the 
filters securely, then turn on the power again.
Storing the projector
If you need to store the projector for an extended time, please follow the instructions below.
■ Make sure the temperature and humidity of the storage area are within the recommended 
range for the projector. Please refer to the Spec. page in the manual or consult your dealer 
about the range.
■ Retract the adjuster feet.
■ Remove the batteries from the remote control.
■ Pack the projector in its original packing or equivalent.
Transporting the projector
It is recommended that you ship the projector with its original packing or equivalent. When 
you carry the projector yourself, please use the provided soft carry case. 
						

							Maintenance 36
Lamp Information
Use and Replacement of the Lamp
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 mal-
function in the projector and in some instances the lamp may explode.
For more detailed information, please refer to page 38.
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.
The out of lamp time warning is calculated on normal mode operation. If the projector is run in
economy mode the allowable lamp time is 3000 hours. If the projector is used in both normal
and economy modes then the allowable lamp time is calculated at a rate of 66% while the
economy mode is active. In this case the out of lamp time warning will occur between 2000
and 3000 hours depending on the percentage of economy mode usage.
Lamp Replacement
To reduce the risk of electrical shock, always turn the projector off and disconnect the power
cord before changing the lamp.   
MessageStatus
The lamp has been in operation for 1980 hours. Install 
a new lamp for optimal performance.
The lamp has been in operation for 2980 hours, and 
the power will shutdown in 20 hours time. A new lamp 
should be fitted to avoid the inconvenience when the 
projector runs out of lamp time.
The lamp has been in operation for over 3000 hours. 
The message will flash on the center of the screen with 
the Lamp indicator lighting up red for 40 seconds and 
shut down afterwards.  
						

							Maintenance 37
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.
Step 1. Turn the power off and disconnect the projector from the wall socket.
Step 2. Turn the projector over. Then loosen the 
screws and remove the lamp cover. If the 
lam p is  h ot, avoid bur ns  by  waitin g for 45 
minutes until the lamp has cooled.
Step 3. Loosen the screw that fixing the lamp to 
the projector. If the screw is not loosened 
completely, they could injure your fin-
gers. It is strongly recommended that you 
use a magnetic-head screwdriver.
Step 4. 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 com-
ponents inside, it could cause color unevenness and distortion of the projected images.
Step 5. Insert a new lamp. Make sure the handle is fully locked and tighten the screw firmly.
Loose screw may cause a bad connection, which could result in malfunction.
Do not over tighten the screw. 
						

							Maintenance 38Step 6. Re-install the lamp cover and tighten the 
screw. Do not turn the power on with the 
lamp cover removed. Whenever the lamp 
is replaced, reset the total lamp operation 
time. Do not reset if the lamp is not 
replaced as this could cause damage. 
Step 7. Reset the lamp counter  
i. Press and hold Exit on the projector 
for 3 seconds to display the total used 
lamp time.
ii. Press Menu on the projector or on 
the remote control to access the lamp 
hour timer. An adjustment message 
will appear.
iii. Press W or X to reset lamp hours 
and press EXIT to leave.
Te m p  I n f o r m a t i o n
When the Temperature warning light is on, it is warning you of the following possible prob-
lems:
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 38.
Indicators
Illustration
1.Blank - : Light OFF
2.  : Light flashing
3.  : Light ON
4.
O : Orange light
5.
R : Red light
6.
G : Green light 
  
   
						

							Maintenance 39
LEDStatus & Description
PowerTe m pLamp
Power events
The projector has just been connected to a power outlet.
--
Stand-by mode.
--
(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 Power indicator lig ht is flashing during powering up.
--The projector is under normal operation.
Lamp events
---The lamp counter has developed a problem.
--It is warning you that lamp usage has exceeded 2000 / 3000 
(Economic Mode) hours. Replace the projection lamp with a 
new one immediately.
--The lamp is not properly attached or the lamp is damaged. 
Please contact your dealer for assistance.
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.
-
The projector has shutdown automatically. If you try to re-
start the projector, it will shutdown again. Please contact your 
dealer for assistance.
-
The projector has shutdown automatically. If you try to re-
start the projector, it will shutdown again. Please contact your 
dealer for assistance.
-
The projector has shutdown automatically. If you try to re-
start the projector, it will shutdown again. Please contact your 
dealer for assistance.
O O O 
O 
O
 G 
 G 
 R 
 R 
 R 
 R  G 
 R  G 
 G  R  
						

							Maintenance 40The projector has shutdown automatically. If you try to re-
start the projector, it will shutdown again. Please contact your 
dealer for assistance.
The projector has shutdown automatically. If you try to re-
start the projector, it will shutdown again. Please contact your 
dealer for assistance.
-
The projector has shutdown automatically. If you try to re-
start the projector, it will shutdown again. Please contact your 
dealer for assistance.
The projector has shutdown automatically. If you try to re-
start the projector, it will shutdown again. Please contact your 
dealer for assistance.
The projector has shutdown automatically. If you try to re-
start the projector, it will shutdown again. Please contact your 
dealer for assistance.
The projector has shutdown automatically. If you try to re-
start the projector, it will shutdown again. Please contact your 
dealer for assistance.
 G  R  G 
 G  R  G 
O  R 
O  R  G 
O  R  G 
 R  G  R  
						

							Maintenance 41
Service Information
Accessories (included in the standard package) 
Optional Accessories (not included in the standard package)  
Ordering Parts or Getting Information
For product information, product assistance, service information, or to order accessories, 
please visit the BENQ Corporation website at http://www.BenQ.com.
Description   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Part Number
Power cord (US)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27.01818.000
Power cord (EU)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27.82718.281
Power cord (UK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27.01018.000
Signal cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   50.J0508.502
Video cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   50.J1303.501
S-Video cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  50.72920.011
RCA R/W audio cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   50.J1311.001
PC - PC audio cable  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50.74405.501
Soft carry case  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47.J8104.001
Component Video cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50.J2401.001
USB mouse cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50.73213.501
Remote control  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56.26J95.011
3-2 power converter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22.91007.001
D-Sub - DVI-I cable  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   50.J2103.501
Description of parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Part number  
Mac adapter (switchable)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20.20118.A15
300W lamp module   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   60.J7693.CG1
Ceiling mount kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   60.J7683.001
Wireless Pro (EU). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   59.J8201.001
Wireless Pro (US) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   59.J8201.002
Presentation Pro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   60.J2278.001
DVI-I cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   50.J2508.501 
						

							Troubleshooting 42
Troubleshooting
Common Problems & Solutions
THE PROJECTOR DOES NOT TURN ON.
NO PICTURE   
BLURRED IMAGE
REMOTE CONTROL DOES NOT WORK
  
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 
lensRemove the lens cap.
CauseRemedy
The batteries are out of power. Replace both of the batteries 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 6 meters (19.5 feet) of the 
projector. 
						

							Specifications 43
Specifications
Projector Specifications 
Technical Specifications
All specifications are subject to change without notice. 
General
Product name Digital Projector
Model name PB8250         1024X768  XGA
Optical
Display system 1-CHIP DMD
Lens F/Number F/2.4
Lamp 300W P-VIP lamp
Electrical
Power supply AC100 ~ 240V, 4.5A, 50/60 Hz (Automatic)
Power consumption 395W (Max)
Mechanical
Dimensions 320 mm (W) x 106 mm (H) x 236 mm (D)
Operating temperature 
range0°C ~ 40°C
Weight 7.7 lbs (3.5 Kg)
Input terminal
Computer input
     RGB input D-sub 15-pin (female)
     DVI-I input
Video signal input
     S-VIDEO Mini DIN 4-pin port x1
     VIDEO RCA jack x1
HDTV signal input D-sub  YP
bPr RCA jack x3, through RGB input
Audio signal input
     Audio 1 Mini jack stereo port
Output
USB mouse connector  A/B series x1
Speaker  1 watt x 2
RGB
Audio L/R
Control
RS-232C 9-pin x1 
						

							Specifications 44
Timing Chart
Supported timing for PC (including DVI-I) input
Supported timing for YP
bPr input
Supported timing for Video and S-Video inputs
ResolutionHorizontal 
Frequency 
(kHz)Ve rt i c a l  
Frequency 
(Hz)Pixel 
Frequency 
(MHz)Mode
720x400 37.927 85.039 35.500 720x400_85
640x48031.469 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
800x60037.879 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
1024x76848.363 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
1280x1024 63.981 60.020 108.000 SXGA3_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)Pixel 
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