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...

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...

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...

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...

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...

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...

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)  . . . . . . . . . . . . . ....

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....

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...

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...