Development
1. Be careful not to nick or scratch the development roller.
2. Place the development unit on a sheet of paper after removing it from the machine.
3. Never disassemble the development roller assembly. The position of the doctor plate is set with special
tools and instruments at the factory to ensure the proper gap between the doctor blade and the
development roller.
4. Clean the drive gears after removing used developer.
5. Dispose of used developer in accordance with local regulations.
6. Never load types of developer and toner into the development unit other than specified for this model.
Doing so will cause poor copy quality and toner scattering.
7. Immediately after installing new developer, the TD sensor initial setting procedure should be per-
formed with SP2801 (TD Sensor Initialization) to avoid damage to the machine. Do not perform the
TD sensor initial setting with used developer. Do not make any copies before doing the TD sensor
initial setting.
8. When using a vacuum cleaner to clean the development unit casing, always ground the casing with
your fingers to avoid damaging the toner density sensor with static electricity.
9. When replacing the TD sensor, replace the developer, then execute SP2801 (TD Sensor Initialization)
and SP2962 (Adjustment of Drum Conditions).
Cleaning
1. When servicing the cleaning section, be careful not to damage the edge of the cleaning blade.
2. Do not touch the cleaning blade with bare hands.
3. Before disassembling the cleaning section, place a sheet of paper under it to catch any toner falling
from it.
Fusing Unit
1. After installing the fusing thermistor, make sure that it is in contact with the hot roller and that it is
movable.
2. Be careful not to damage the edges of the hot roller strippers or their tension springs.
3. Do not touch the fusing lamp and rollers with bare hands.
4. Make sure that the fusing lamp is positioned correctly and that it does not touch the inner surface of
the hot roller.
General Cautions
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