Carriage Unit
J007/J010/J011 6-10 SM
6.3.6 INK OUT
Two sensor pins [1] (1 pair for each tank) monitor the amount of air in the print head tank.
These pins detect changes in the voltage differential on the surface of the ink inside the
print head tank.
When these terminals detect air in the tank, air escapes through the air release valve [2]
opened by the air release solenoid [3]. This allows more ink to enter the tank.
This is a continuous operation. The sensor pin readings signal the ink-out condition when:
The ink near-end alert has been issued.
The amount of air detected in the tank indicates that no ink remains in the tank.
Also, as a backup measure, the firmware counts up for the amount of ink consumed after
every near end occurrence. When this count reaches the value prescribed for the toner
cartridge, this will also signal an ink-out condition.
6.3.7 REGISTRATION SENSORS
1 1st Registration Sensor
2 Transport Belt
3 Paper (Leading Edge)
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