Downloaded from Projector.com
© 3M 1997 3M™ Multimedia Projector MP8640
Section 6: Maintenance

6.1 Cleaning the Air Filter

Note: Clean the air filter about every 50 hours.
a) Turn off the MAIN POWER switch of the projector and pull out power cord. Let cool for 20 minutes.
b) Remove the air filter from the bottom of projector. Unscrew two retaining screws and pull down and
out on the handle to free air cleaner door. Carefully lift up and out on filter door.
ON indicator
LAMP indicator
TEMP indicator
Indicator status
Lights orange
Blinks green
Lights green
Blinks orange
Lights red
Blinks red
Lights red
Blinks red
Meaning
Standby mode
During warming up
During operation
During cooling down
Lamp cannot light
Air filter open
Temperature inside too high
Cooling fan not operating
Remedy
normal
normal
normal
normal
Cool projector by power off for 20 minutes.
Ensure filter is closed.
Let projector cool 20 minutes. Check air flow and filter.
call your dealer

6.2 Message Table

a) On Screen Display. The following messages are displayed on the screen:
NO SIGNAL IS DETECTED: The projector is not detecting a signal.
SYNC IS OUT OF RANGE: The horizontal frequency of the input signal exceeds the range
of the projector, or it cannot be displayed.
CHANGE THE LAMP: Change when the lamp message appears on the screen. See
Section 6.3 for more information.
b) Indicator Display. The ON indicator, LAMP indicator and TEMP indicator will light or blink in the
following cases:
*When the LAMP indicator lights or blinks, turn the power off. If the problem persists, contact your dealer.
23
c) Clean the air filter using a vacuum cleaner. If dirt is still present, wipe the air filter with a cloth
moistened with water and wipe with a dry lint-free cloth.
d) After filter dries completely, re-install the air filter.
Note: If air flow is restricted due to dust accumulation on filter, the projector may shut down due to over heating.
Remove the air filter