Ricoh Toscana-P1 J007 Service Manual page 215

6. Detailed Section Descriptions
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.
6
No.
1 AS
2 F
3 HT
4 ---
5 H
6 IM
7 CT
The components and operation of the print heads in the J011 are identical to those of the J007/J010
described above. However, two additional print head units are provided on the J007/J010.
The outer print heads unit both supply Yellow and Magenta ink.
During bi-directional printing:
214
J011
Air Sensors x6
Feelers x6
Head Tanks x6
Filter Units x4
Print Heads x6
Ink Pump Motors x3
Ink Cartridges x4