Dukane Imagepro 8755n Projector Users Manual

							111
Maintenance
Cleaning and replacing the air filter (continued)
9.Turn the projector on and reset the filter time using the FILTER TIME item in 
the EASY MENU.
►Before taking care of the air filter, make sure the power cable 
is not plugged in, then allow the projector to cool sufficiently. Taking care of the 
air filter in a high temperature state of the projector could cause an electric shock, 
a burn or malfunction to the projector.
►Use only the air filter of the specified type. Do not use the projector without the 
air filter or the filter cover. It could result in a fire or malfunction to the projector.
►Clean the air filter periodically. If the air filter becomes clogged by dust or the 
like, internal temperatures rise and could cause a fire, a burn or malfunction to 
the projector. WARNING
• Please replace the air filter when it is damaged or heavily soiled.
• When you replace the projection lamp, please replace the air filter . An air filter 
of specified type will come together with a replacement lamp for this projector .
• Please reset the filter time only when you have cleaned or replaced the air 
filter, for a suitable indication about the air filter.
• The projector may display the message such as “CHECK THE AIR FLOW” or 
turn off the projector, to prevent the internal heat level rising. NOTE (1) Press the MENU button to display a menu. 
(2)  
Point at the FILTER TIME using the ▼/▲ button, then press the ► button. 
A dialog will appear.
(3)   Press the ► button to select “OK” on the dialog. It performs resetting the 
filter time. 
						

							112
Maintenance
Other care
In order to ensure the safe use of your projector, please have it cleaned and 
inspected by your dealer about once every year.
1.Turn the projector off, and unplug the power cord. Allow the projector to cool 
sufficiently.
2.After making sure that the projector is cool adequately, lightly wipe the lens 
with a commercially available lens-cleaning wipe. Do not touch the lens 
directly with your hand.
If the lens is flawed, soiled or fogged, it could cause deterioration of display 
quality. Please take care of the lens, being cautious of handling.
►Before caring, make sure the power cord is not plugged in, 
and then allow the projector to cool sufficiently. The care in a high temperature 
state of the projector could cause a burn and/or malfunction to the projector .
►Never try to care for the inside of the projector personally. Doing is so 
dangerous. 
►Avoid wetting the projector or inserting liquids in the projector. It could result in 
a fire, an electric shock, and/or malfunction to the projector. 
•   Do not put anything containing water, cleaners or chemicals near the projector. 
•   Do not use aerosols or sprays.WARNING
►Please take right care of the projector according to the 
following. Incorrect care could cause not only an injury but adverse influence 
such as discoloration, peeling paint, etc. 
►Do not use cleaners or chemicals other than those specified in this manual. 
►Do not polish or wipe with hard objects.
NOTICE ►Do not directly touch the lens surface with hands. CAUTION
Inside of the projector
Caring for the lens
1.Turn the projector off, and unplug the power cord. Allow the projector to cool 
sufficiently.
2.After making sure that the projector is cool adequately, lightly wipe with gauze 
or a soft cloth. 
If the projector is extremely dirty, dip soft cloth in water or a neutral cleaner 
diluted in water, and wipe lightly after wringing well. Then, wipe lightly with a 
soft, dry cloth.
Incorrect care could have adverse influence such as discoloration, peeling paint, 
etc. Caring for the cabinet and remote control 
						

							113
Troubleshooting
Troubleshooting
If an abnormal operation should occur, stop using the projector immediately.
Otherwise if a problem occurs with the projector, the following checks and measures are 
recommended before requesting repair. 
If this does not resolve the problem, please contact your dealer or service company. They 
will tell you what warranty condition is applied.
►Never use the projector if abnormal operations such as smoke, 
strange odor, excessive sound, damaged casing or elements or cables, penetration 
of liquids or foreign matter, etc. should occur. In such cases, immediately disconnect 
the power plug from the power outlet. After making sure that the smoke or odor has 
stopped, contact to your dealer or service company.WARNING
Related messages
When some message appears, check and cope with it according to the following table. 
Although these messages will be automatically disappeared around several minutes, it will 
be reappeared every time the power is turned on.
Message Description
There is no input signal. 
Please confirm the signal input connection, and the status 
of the signal source.
Projector is waiting for an image file.
Check the hardware connection, settings on the projector 
and network-related settings.
The computer-Projector network connection might be 
disconnected. Please re-connect them.
The horizontal or vertical frequency of the input signal is 
not within the specified range.
Please confirm the specs for your projector or the signal 
source specs.
An improper signal is input. 
Please confirm the specs for your projector or the signal 
source specs.
(continued on next page)
Troubleshooting 
						

							114
MessageDescription
The internal temperature is rising. 
Please turn the power off, and allow the projector to cool 
down at least 20 minutes. After having confirmed the 
following items, please turn the power ON again. 
 • Is there blockage of the air passage aperture? 
 • Is the air filter dirty? 
 • Does the peripheral temperature exceed 35°C?
 • If the projector is used at an altitude of about 1600 m (5250 
feet) or higher, set ALTITUDE of the SERVICE item in the 
OPTION menu to HIGH  (
59)
.  
If the projector is used with a wrong setting, it may cause 
damage to the projector itself or the parts inside.
A note of precaution when cleaning the air filter. 
Please immediately turn the power off, and clean or change 
the air filter referring to the Cleaning and replacing the 
air filter section of this manual. After you have cleaned or 
changed the air filter, please be sure to reset the filter timer 
(
 57, 110).
The button operation is not available.
Troubleshooting
Related messages (continued) 
						

							115
Troubleshooting
Regarding the indicator lamps
When operation of the LAMP, TEMP and POWER indicators differs from usual, 
check and cope with it according to the following table.
POWER 
indicator LAMP 
indicator TEMP 
indicator Description
Lighting
In Orange Turned
off Turned
off
The projector is in a standby state.Please refer to the section “Power on/off”.
Blinking
In Green Turned
off Turned
off
The projector is warming up.Please wait.
Lighting
In Green Turned
off Turned
off
The projector is in an on state.Ordinary operations may be performed.
Blinking
In Orange Turned
off Turned
off
The projector is cooling down.Please wait.
Blinking In Red (discre-
tionary)(discre-
tionary)
The projector is cooling down. A certain error 
has been detected.
Please wait until 
POWER indicator finishes blinking, 
and then perform the proper measure using the item 
descriptions below.
Blinking In Red or
Lighting In Red Lighting
In Red Turned
off
The lamp does not light, and there is a possibility 
that interior portion has become heated.
Please turn the power off, and allow the projector to 
cool down at least 20 minutes. After the projector has 
sufficiently cooled down, please make confirmation of 
the following items, and then turn the power on again.
• Is there blockage of the air passage aperture?
• Is the air filter dirty?
• Does the peripheral temperature exceed 35°C?
If the same indication is displayed after the remedy, 
please change the lamp referring to the section 
Replacing the lamp .
Blinking In Red or
Lighting In Red Blinking
In Red Turned
off
The lamp cover has not been properly fixed. Please turn the power off, and allow the projector to 
cool down at least 45 minutes. After the projector has 
sufficiently cooled down, please make confirmation of 
the attachment state of the lamp cover. After performing 
any needed maintenance, turn the power on again. 
If the same indication is displayed after the remedy, 
please contact your dealer or service company.
(continued on next page) 
						

							116
Troubleshooting
Regarding the indicator lamps (continued)
POWER 
indicator LAMP 
indicator TEMP 
indicator Description
Blinking In Red or
Lighting In Red Turned
off Blinking
In Red
The cooling fan is not operating.Please turn the power off, and allow the projector to 
cool down at least 20 minutes. After the projector has 
sufficiently cooled down, please make confirmation 
that no foreign matter has become caught in the fan, 
etc., and then turn the power on again.
If the same indication is displayed after the remedy, 
please contact your dealer or service company.
Blinking In Red or
Lighting In Red Turned
off Lighting
In Red
There is a possibility that the interior portion 
has become heated.
Please turn the power off, and allow the projector to 
cool down at least 20 minutes. After the projector has 
sufficiently cooled down, please make confirmation of 
the following items, and then turn the power on again.
• Is there blockage of the air passage aperture?
• Is the air filter dirty?
• Does the peripheral temperature exceed 35°C?
• If the projector is used at an altitude of about 1600 m 
(5250 feet) or higher, set ALTITUDE of the SERVICE 
item in the OPTION menu to HIGH  (
59). If the 
projector is used with a wrong setting, it may cause 
damage to the projector itself or the parts inside.
Lighting
In Green Simultaneous
blinking in  Red
It is time to clean the air filter.Please immediately turn the power off, and clean or 
change the air filter referring to the section  Cleaning 
and replacing the air filter. After cleaning or changing 
the air filter, please be sure to reset the filter timer. 
After the remedy, reset the power to ON.
Lighting
In Green Alternative
blinking in  Red
There is a possibility that the interior portion 
has become overcooled.
Please use the unit within the usage temperature 
parameters (5°C to 35°C).  
After the treatment, reset the power to ON.
(continued on next page) 
						

							117
• When the interior portion has become overheated, for safety 
purposes, the projector is automatically shut down, and the indicator lamps 
may also be turned off. In such a case, disconnect the power cord, and wait at 
least 45 minutes. After the projector has sufficiently cooled down, please make 
confirmation of the attachment state of the lamp and lamp cover, and then turn 
the power on again. 
If the projector is used at an altitude of about 1600 m (5250 feet) 
or higher, set ALTITUDE of the SERVICE item in the OPTION menu to HIGH  (
59). 
Otherwise, set it to NORMAL. NOTE
Troubleshooting
POWER 
indicator LAMP 
indicator TEMP 
indicator Description
Blinking In  Green for approx. 3  seconds. Turned
off Turned
off At least 1 Power ON schedule is saved to the 
projector.
Please refer to Schedule Settings in the Network 
Guide.
Lighting
In Orange Lighting
In Red Lighting
In Red Loading the saved data of CLONING on STANDBY 
MODE.
Blinking
In Orange Blinking
In Red Blinking
In Red Loading the saved data of CLONING has failed on 
STANDBY MODE.
Please refer to CLONING (

63 ~ 65).
Turned off Turned
off Turned
off
Loading the saved data of CLONING has succeeded 
on STANDBY MODE.
Regarding the indicator lamps (continued) 
						

							118
Troubleshooting
Resetting all settings
When it is hard to correct some wrong settings, the FACTORY RESET function of 
SERVICE item in OPTION menu (
66) can reset all settings (except settings such 
as LANGUAGE, LAMP TIME, FILTER TIME, FILTER MESSAGE, SECURITY and 
NETWORK) to the factory default. Be sure to set ALTITUDE after resetting all the 
settings  (
59)
.
Phenomena that may be easy to be mistaken for machine defects
About the phenomenon confused with a machine defect, check and cope with it 
according to the following table.
Phenomenon Cases not involving a machine defectReference 
page
Power does 
not come on. The electrical power cord is not plugged in.
Correctly connect the power cord.
16
The main power source has been interrupted during 
operation such as by a power outage (blackout), etc.
Please disconnect the power plug from the power outlet, 
and allow the projector to cool down at least 10 minutes, 
then turn the power on again.
16
Either there is no lamp and/or lamp cover, or either 
of these has not been properly fixed.
Please turn the power off and disconnect the power 
plug from the power outlet, and allow the projector to 
cool down at least 45 minutes. After the projector has 
sufficiently cooled down, please make confirmation of 
the attachment state of the lamp and lamp cover, and 
then turn the power on again.
108
Neither soundsnor pictures areoutputted.
The signal cables are not correctly connected.
Correctly connect the connection cables.
12 ~ 15
Signal source does not correctly work.
Correctly set up the signal source device by referring to 
the manual of the source device.
–
The input changeover settings are mismatched.
Select the input signal, and correct the settings.24, 25
The BLANK function for pictures and the MUTE 
function for sounds are working.
AV MUTE may be active. 
Refer to the item “Sound does not come out” and “No 
pictures are displayed” on the next page to turn off the 
MUTE and BLANK functions.
23, 31
(continued on next page) 
						

							119
Troubleshooting
Phenomena that may be easy to be mistaken for machine defects (continue\
d)
PhenomenonCases not involving a machine defectReference 
page
Sound does 
not come out. The signal cables are not correctly connected.
Correctly connect the audio cables.
12 ~ 15
The MUTE function is working.
Restore the sound pressing 
MUTE or VOLUME +/- 
button on the remote control.
23
The volume is adjusted to an extremely low level.
Adjust the volume to a higher level using the menu 
function or the remote control.
23, 49
The AUDIO SOURCE/SPEAKER setting is not correct.
Correctly set the AUDIO SOURCE/SPEAKER in AUDIO menu.49
The Sound button (♪) or checkbox is disabled.
If you have selected USB TYPE A, turn the sound on 
from the Thumbnail menu. 
If you have selected USB TYPE B, remove the check 
mark from the Sound checkbox in the Options window of 
“LiveViewer Lite for USB”.
If you have selected LAN, remove the check mark from 
the Sound checkbox in the Option menu of “LiveViewer”.
87, 103, 
107
No pictures are  displayed. The lens cover is attached.
Remove the lens cover.
4
The signal cables are not correctly connected.
Correctly connect the connection cables.12 ~ 15
The brightness is adjusted to an extremely low level.
Adjust BRIGHTNESS to a higher level using the menu function.36
The computer cannot detect the projector as a Plug-
and-Play monitor.
Make sure that the computer can detect a Plug-and-Play 
monitor using another Plug-and-Play monitor.
11
The BLANK screen is displayed.
Press BLANK button on the remote control.31
"Waiting for connection." remains displayed even 
though the USB TYPE B port is selected.
Remove the USB cable and reconnect after a while.12, 13
(continued on next page) 
						

							120
PhenomenonCases not involving a machine defectReference 
page
No pictures are displayed. 
(continued) The projector does not recognize the USB storage 
device inserted into USB TYPE A port. Before removing the USB storage device, be sure to use 
the REMOVE USB function on the thumbnail screen, which 
appears when the USB TYPE A port is selected as the input 
source.13, 87
Video screen 
display 
freezes. The FREEZE function is working.
Press FREEZE button to restore the screen to normal.31
Colors have a
faded- out
appearance, or Color tone is  poor. Color settings are not correctly adjusted.
Perform picture adjustments by changing the COLOR 
TEMP, COLOR, TINT and/or COLOR SPACE settings, 
using the menu functions.37, 42
COLOR SPACE setting is not suitable.
Change the COLOR SPACE setting to AUTO, RGB, 
SMPTE240, REC709 or REC601. 
42
Pictures 
appear dark. The brightness and/or contrast are adjusted to an 
extremely low level.
Adjust BRIGHTNESS and/or CONTRAST settings to a 
higher level using the menu function.
36
The projector is operating in Eco mode.
Set ECO MODE to NORMAL, and set AUTO ECO 
MODE to OFF, in the SETUP menu.47
The lamp is approaching the end of its product 
lifetime.
Replace the lamp.
108, 109
Pictures 
appear blurry. Either the focus and/or horizontal phase settings are 
not properly adjusted.
Adjust the focus using the focus ring, and/or H PHASE 
using the menu function.
27, 41
The lens is dirty or misty.
Clean the lens referring to the section 
Caring for the 
lens.
112
(continued on next page)
Troubleshooting
Phenomena that may be easy to be mistaken for machine defects (continue\
d)