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3. REPLACEMENT AND ADJUSTMENT
3.1 PRECAUTIONS
3.1.1 GENERAL PRECAUTIONS
To avoid damage to the transfer belt, drum, or development unit, never turn off the
power switch while electrical components are active.
Always turn off the power switch and unplug the machine before attempting any of
the procedures in this section.
3.1.2 LASER UNIT PRECAUTIONS
1.
To avoid putting the LD unit out of proper adjustment, never loosen the screws that
secure the LD drive board to the laser diode casing.
2.
Never adjust the variable resistors on the LD unit, as they are adjusted in the factory.
3.
The polygon mirror and F-theta lenses are very sensitive to dust. Never open the optical
housing unit.
4.
Never touch the glass surface of the polygon mirror motor unit with bare hands.
5.
After replacing the LD unit, do the laser beam pitch adjustment. Otherwise, an SC
condition will be generated.
Always dispose of used toner in accordance with local regulations.
To avoid a serious fire hazard, never expose toner to an open flame.
SM
3-1
G147
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