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BJC-5000
5. SENSOR FUNCTIONS
The printer has a pick-up roller sensor, paper end sensor, home position sensor, purge
sensor, cover open sensor, printer temperature sensor, head temperature sensor, and
auto-alignment sensor.
The printer is also provided with a waste ink absorption amount detection function
which counts and stores the waste ink absorption amount in the EEPROM and issues an
error signal when the waste ink absorber becomes full.
Cover Open Sensor
Head Temperature Sensor
5.1 Pick-Up Roller Sensor
The photo interrupter-type pick-up roller sensor detects the initial position of the sheet
feeder pick-up roller. When the initial position is detected, the flag interrupts the
sensor and the sensor detection status is activated.
5.2 Paper End Sensor
The photo interrupter-type paper end sensor uses the paper sensor arm's flag to detect
the presence of paper when the front edge of the paper sheet passes through the paper
feeding mechanism. The sensor is closed by the paper sensor arm when there is no
paper, and opened (paper is recognized) when paper is detected.
Printer Temperature Sensor (TH1)
(contact point)
Auto-Alignment Sensor
Figure 4-30 Sensors
Home Position
4-41
Part 4: Technical Reference
Paper End Sensor (right)
Pick-Up Roller Sensor (left)
Purge Sensor
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