Canon POD Deck Lite-C1 Service Manual

Contents

Canon POD Deck Lite-C1 Service Manual Manual pdf 23 page image

Lifter Control■ Moving Up the LifterThe lifter starts to move up when the compartment open/close switch (SW4) and the compartment open/close sensor (SR9)detect that the compartment has been set in place.The lifter then stops when the paper level sensor (SR3) detects the top surfaceof the stack of paper placed on the lifter.The deck lifter upper limit sensor 1/2 (SR4/5) is used to prevent damage otherwise causedby the failure of the lifter to stop after the sensor lever blocks the paper level sensor (SR3).The machine is also equipped with aprotective mechanism by means of an obstacle sensor (SR8) used to prevent damage to the lifter cable and resin gears lest aforeign object inside the compartment should hit the ceiling before the paper level sensor (SR3) detects the top surface of thestack of paper.■ Moving Down the LifterThe lifter starts to move down when the compartment open switch is pushed until the lifter passes through the sensor lever ofthe relay paper sensor (SR2). When paper is supplied in this condition, the lifter moves down to the position where the paperpasses through the sensor lever as the paper pushes the sensor lever. The lifter keeps moving down until the lifter passes throughthe deck lifter lower position sensor (SR13) which detects maximum paper supply position each time when paper is supplied.SR13SW4SR9SR2SR3SR4SR5SR8M3Remaining Paper Level Detection ControlThe level of the paper remaining is detected by counting the pulses of the encoder for the lifter motor rotation sensor (SR14) thatrepresent the distance of movement of paper from the deck lifter lower position sensor (SR13) to the paper level sensor (SR3).Theencoder for the lifter motor rotation sensor (SR14) rotates in synchronization with the deck lifter motor (M3).When the relay papersensor (SR2) became OFF from ON during paper feed, the count value of the pulse is reset for the correction of the detectionerror by the wire growth.The lifter position information is memorized in the EEPROM of the deck driver PCB. Therefore the lifterposition control is not performed after sleep again.The level of the paper remaining is indicated on the display on the host machine.2. Technology17