Specifications

Rev. A Outline of Operation 2-19
TM-J8000/J8000P Technical Manual
Confidential
Pump position detector mechanism
This mechanism detects the roller position. The mechanism consists of a pump-position detector
plate (linked to a pressure pulley) and a pump-position detector.
The pump-position detector consists of an LED and a photo IC. The detector plate, which
includes a cutout area, fits between the LED and the photo IC and is turned by the power of the
pump motor.
When the cutout area moves into this area it allows light to pass from the LED to the IC, causing
a change in the IC output which services to detect the roller position
.
Figure 2-27 Pump position detector mechanism
Ink nearend detector mechanism
The ink nearend detector is mounted on the cartridge guide unit, and monitors the ink level in
the installed ink cartridge.
Detection is by mechanical contact. The contact remains open so long as the cartridge contains a
sufficient level of ink. When the ink level runs low, the detector plate mounted on the cartridge
presses on the detector’s actuator, causing the contact to close.
When the detector detects that ink has run out, it resets the ink usage counter. Ink-end will occur
when ink usage reaches the specified value
.
Figure 2-28 Ink nearend detector mechanism
pump position
detector
pressure
pulley
roller
pump position
detector plate
ink cartridge
ink pack
acutuator
ink nearend detector
cartridge guide unit
ink discharging absorber
ink nearend detector plate