Specifications

2-20 Outline of Operation Rev. A
Confidential
Cartridge detector mechanism
The cartridge detector, mounted on the cartridge guide unit, detects whether the cartridge is
installed, and whether it is installed correctly.
Detection is by mechanical contact. The contact is closed if there is no ink cartridge in place.
When the ink cartridge is installed correctly in place, the side of the cartridge presses against the
actuator on the detector, causing the contact to open.
Figure 2-29 Cartridge detector mechanism
T.O.F. detector mechanism
This mechanism is mounted just in front of the form stopper to confirm that a newly inserted
slip has moved all the way up to the form stopper correctly.
The detector consists of an LED and a phototransistor. When a slip moves into place, light from
the LED reflects from the slip back to the phototransistor. The phototransistor output changes
accordingly, indicating that the sheet is in position.
Figure 2-30 T.O.F. detection circuit
ink cartridge
actuator
cartridge detector
ink needle
cartridge guide unit