Ricoh J001 Service Manual page 498

Ink Supply System
Two ink pump motors [6] drive the simple pump mechanisms that draw ink out of the ink
cartridges [7] and send it to the head tanks.
One ink pump motor operates the pumps of two ink cartridges. The ink pump motor drives
a single worm gear. The direction of rotation of the gear determines which pump is
operated. For example, when the KC ink pump motor in the illustration above rotates the
worm gear forward, the pump draws cyan ink (C) from the C ink cartridge, and when the
motor reverses, it draws black ink (K) from the K ink cartridge.
The ink pump motor switches on in response to a request for more ink when the ink level
sensor detects that the position of a feeler on the side of a tank indicates that a tank is low.
Ink is also drawn into the tank from the ink supply tubes when the air sensors detect too
much air in a tank and not enough ink. The air sensor activates the air release solenoid
which creates a partial vacuum inside the tank that purges the air from the tank through a
vent and at the same time draws more ink from the supply tubes into the tank.
No.
1 AS Air Sensors x6
2 F Feelers x6
3 HT Head Tanks x6
4 --- Filter Units x4
5 H Print Heads x6
6 IM Ink Pump Motors x3
7 CT Ink Cartridges x4
J007/J010/J011
CÓPIA NÃO CONTROLADA
J011
6-18
CÓPIA NÃO CONTROLADA
Rev. 11/2008
SM