3M MP8640 manual Maintenance, Cleaning the Air Filter, Message Table

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.

Remove the air filter

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.

6.2Message 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:

	Indicator status	Meaning	Remedy
	Lights orange	Standby mode	normal
ON indicator	Blinks green	During warming up	normal
	Lights green	During operation	normal
	Blinks orange	During cooling down	normal
LAMP indicator	Lights red	Lamp cannot light	Cool projector by power off for 20 minutes.
	Blinks red	Air filter open	Ensure filter is closed.
TEMP indicator	Lights red	Temperature inside too high	Let projector cool 20 minutes. Check air flow and filter.
	Blinks red	Cooling fan not operating	call your dealer

*When the LAMP indicator lights or blinks, turn the power off. If the problem persists, contact your dealer.

© 3M 1997 3M™ Multimedia Projector MP8640

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