Cleaning Mechanism - Epson Stylus PRO 7500 Service Manual

EPSON Stylus Pro 7500
The following sensors aid in the paper feeding process.
o
P_FRONT sensor
This sensor is attached to the subplaten and is an optical (photo-reflective) sensor.
This sensor detects the front edge of the paper after paper has been loaded but
before it is set and ready to print.
o
P_REAR sensor
This sensor is attached to the Upper Paper Guide and is an optical (photo-
reflective) sensor. This sensor detects the rear edge of the paper and detects the
front edge when the paper is first loaded in the paper path. The position of this
sensor is stored in EEPROM.
o
P_THICK sensor
This optical sensor physically gauges whether the paper falls into the normal/thin
category or the thick category.
Table 2-2. Paper Thickness Detection
Paper Type Detected Thickness
Thin Paper 0.6mm or less
Thick Paper 0.7mm or more
*1:When the paper thickness is 0.6 ~ 0.7 mm, it is not definite which will be detected.
o
Release Sensor
A transmissive photosensor is used and it is mounted on the H top cover rear side
(right). It is constructed so that the sensor detection lever is linked to the paper
support lever's operations. When the paper support lever is in the forward
position, it is in the set state (Fixed position).
Also, when the release sensor is in the "Release" state, the CR motor and PF
motor are stopped.
Operating Principles
Output Signal
Sensor Signal
Strength
On 0.7V or more
Off 2.4V or more
Print Mechanism Components

2.2.3 Cleaning Mechanism

The cleaning mechanism in this printer is compatible with the cleaning mechanism in the
Stylus Pro 5000/9000. The cleaning mechanism is located on the right side of the printer.
The waste ink from the cleaning mechanism is channeled to the waste ink pad in the lower
right side via 2 thin tubes and 1 pipe. (See the figure below.)
Waste ink pads
Figure 2-11. Cleaning Mechanism
Flushing box Pump motor
CR Lock Head
Pump assembly
cleaner
Figure 2-12. Cleaning Mechanism Components
Revision A
Maintenance assembly
Pump rotation : CW
Cap assembly
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