Product specication and feature
2-21
4) Sensor Input Circuit
■ Paper Empty Sensing & Paper Width Sensor
When a printing job comes to the CPU, the CPU initializes the pickup action regardless of the state of the
sensor. If paper is then detected by the Feed Sensor, the paper will then be recognized as e.g. invoice paper
even though the Paper Empty Sensor was on. If no paper is detected by the Feed Sensor, then the CPU will
recognize that a “Paper Empty” condition exists and displays the RED warning light on the OPE PBA.
When a printing job comes to the CPU, the CPU initializes the pickup action regardless of the state of the
sensor. If paper is then detected by the Feed Sensor, the paper will then be recognized as e.g. invoice paper
even though the Paper Empty Sensor was on. If no paper is detected by the Feed Sensor, then the CPU will
recognize that a “Paper Empty” condition exists and displays the RED warning light on the OPE PBA.
■ Regi Sensing
The registration sensor (Regi Sensor, a photo interrupter) informs the CPU that paper is registered at the
registration rollers, and waiting for proper leadedge schronization with the image on the drum.
■ Paper Feeding/With Toner Cartridge Sensing
When the leadedge of the paper is detected by the Feed Sensor (photo interrupter), it begins the
development process of the drum after a predetermined time.
The toner cartridge detection is monitored by the CRUM sensors. If all of the CRUM sensors are off, the CPU
knows the cartridge is not in the machine, and takes appropriate action by turning on the out of toner light. If
the CRUM sensors do not detect that the correct cartridge is inserted, the CPU will display the toner cartridge
is invalid, it will show invalid sign on a LED.
■ Paper Exit Sensing
The Paper Exit Sensor is mounted on the Fuser Unit exit side, and is used to ensure that paper has indeed
exited the machine. If the on/off time of exit sensor is abnormal, then a JAM2 is informed. The LED on the
display will turn on a RED warning color.
■ Cover Open Sensing
The Cover Open Sensor is located on the HVPS. When the front cover is opened, all +24VS is shut off. Then
the customer will be notied on the display that the door is open [“door open”] and the red will turn on.
■ DC FAN / SOLENOID Driving
DC Fans and Clutches are driven by turning on noise when these driver components de-energize. which is
controlled by CPU. The diode in the Fan and Clutch driving circuits protects TR driven from noise when these
driver components de-energize.
■ Motor Driving
The main motor driving circuits are located on the BLDC Motor Ass’y Unit. Main Controller has the interfacing
circuits. There is motor driver IC on the Motor Control Board to control the BLDC Motor assembly unit.