Ricoh Aficio SP C231, Service Manual, Page: 68 / 247

DRUM
2-28
C231 SM
2.5 DRUM
2.5.1 OVERALL
The drum consists of a metal screen [A] and a cloth screen [B].
The ink pump, which is installed inside the drum, supplies ink from the ink cartridge
into the drum through the drum shaft [C]. Ink is then evenly spread on the screens
by the ink [D] and doctor [E] rollers. Ink passes to the paper through the holes
(image) in the master [F], which was made by the thermal head.
The drum is driven by the main motor and turns only clockwise (as viewed from the
operator side). The motor speed and the drum stop positions are controlled by
monitoring the motor encoder.
C231D538.WMF
[A]
[B]
[C]
[D]
[E]
[F]