Epson Stylus Pro 7700 Service Manual page 102

Epson Stylus Pro 7700/7710/7700M/7710M/7900/7910/9700/9710/9900/9910/WT7900/WT7910/9890/9908/7890/7908
PRESSURIZING UNIT
Figure 2-8. Pressurizing Unit
OPERATING PRINCIPLES
1
3
2
Diagram Name
1 Pressure Sensor
Pressurizing Pump
2
Motor
Pressurizing Pump
3
Motor Encoder
Main Body
Description
A transmissive photo interrupter to detect the
pressurizing status. It detects the status of the actuator
which operates when the pressure reaches up to the
specified amount.
Supplies air to pressurize the ink pack. A DC motor
with an encoder scale mounted on it is employed.
Detects patterns of the scale attached on the motor to
control the rotation of the Pressurizing Pump Motor.
Confidential
Revision I
102