Scanner Unit
• Clean the exposure glass with alcohol or with glass cleaner to reduce the amount of static
electricity on the surface of the glass.
• Use a blower brush or a cotton pad with water to clean the mirrors and lens.
• Do not bend or crease the exposure lamp flat cable.
•
Do not disassemble the lens unit. Doing so will throw the lens and the copy image out of focus.
• Do not turn any of the CCD positioning screws. Doing so will throw the CCD out of position.
Laser Unit
• Do not loosen the screws that secure the LD drive board to the laser diode casing. Doing so will
throw the LD unit out of adjustment.
• Do not adjust the variable resistors on the LD unit, as they are adjusted in the factory.
• The polygon mirror and F-theta mirror are very sensitive to dust.
•
Do not touch the glass surface of the polygon mirror motor unit with bare hands.
Fusing Unit
• After installing the fusing thermistor, make sure that it is in contact with the hot roller and that the hot
roller can rotate freely.
• Be careful not to damage the edges of the hot roller strippers or their tension springs.
• Do not touch the fusing lamp and rollers with bare hands.
•
Make sure that the fusing lamp is positioned correctly and that it does not touch the inner surface of
the hot roller.
Paper Feed
• Do not touch the surface of the separation roller, feed roller and pick-up belt.
• To avoid paper misfeeds, the side fences and end fences of the paper tray must be positioned
correctly to align with the actual paper size.
Others
• The toner bottle should be replaced while the main switch is on.
4. Replacement and Adjustment
176
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