Development And Toner Supply - Ricoh SP5 Series Service Manual

June 30, 1998

2.6 DEVELOPMENT AND TONER SUPPLY

2.6.1 OVERVIEW
[G]
[B]
[C]
[A]
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• Paddle Roller [A]
• Upper Development Roller [B]
• Lower Development Roller [C]
• Toner Density Sensor [D]
• Developer Agitator [E]
• Toner Auger [F]
This copier uses a double roller development (DRD) system. Each roller has a
diameter of 20 mm.
This system differs from single roller development systems in that:
(1) It develops the image in a narrower area
(2) It develops the image twice
(3) The relative speed of each development roller against the drum is reduced.
Also, this machine uses fine toner (about 7.5 µm) and developer (about 70 µm).
Both the DRD system and new consumables improve the image quality, especially
of thin horizontal lines, the trailing edges of the half-tone areas, and black cross
points.
The machine contains a toner recycling system. The recycled toner is carried to the
toner hopper [L] by the toner recycling motor and mixed with new toner by the toner
agitator [J]. (The toner recycling system is described in the "Drum Cleaning And
Toner Recycling section".)
[L]
[E]
[D]
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DEVELOPMENT AND TONER SUPPLY
[F]
[H]
[I]
• Development Filter [G]
• Toner Supply Motor [H]
• Toner End Sensor [I]
• Toner Agitator [J]
• Toner Supply Roller [K]
• Toner Hopper [L]
[L]
[J]
[K]
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