Epson DLQ-3000 Service Manual page 93

DLQ-3000+
‰
Front paper sensor
Front paper sensor detects TOF position as well as paper presence condition. It uses a
photo interrupter system. However, one end of the detecting lever is mechanically used
to detect the leading edge of the paper, and the other end is to cut in between the photo
interrupter sensor to detect paper. The output signal is pulled up to 10 K , then input to
the CPU port via the filter circuit which consists of the resistor and the condenser.
Detecting method
Output system
Detecting mode
‰
Right/left PEW sensor
Right/left sensors are located on the left and right column direction with the CR on the
mask guide in between. They don't only detect paper but the paper width so as to
determine the right and left margins. The output signal is output to the CPU A/D
converter.
Detecting method
Output system
Power supply voltage
‰
CR home position sensor
The output signal for this sensor is pulled up to 10K
converter via the filter circuit which consists of the resistor and the condenser.
Table 2-26. CR Home Position Sensor Specification
Detecting method
Output system
Power supply voltage
Switching mode
‰
Release sensor
The output signal for this sensor is pulled up to 6.2K
the filter circuit which consists of the resistor and the condenser.
Detecting method
Rated current/voltage
Switch mode
2-32
Table 2-24. Front Paper Sensor Specification
Photo interrupter systems
Open collector system
Resistance to voltage:30V or less
Sink current : 0.3 mA or less
Paper detected : LOW
No paper detected : HIGH
Table 2-25. Right/left PEW Sensor Specification
Photo micro sensor system
Collector
5 VDC
Photo coupler system
Open collector system
Resistance to voltage:30V or less
Sink current : 0.3 mA or less
5 VDC
In the home position : LOW
Off the home position :HIGH
Table 2-27. Release Sensor Specification
Leaf switch (mechanical) system
0.6 to 1.0mA, 5VDC
Cut sheet mode : Close
Continuous paper mode : Open
Paper jam removal mode : Open
5%
, then input to the CPU A/D
5%
, then input to the CPU port via
5%
Rev. A