Canon Duplex Unit-A1 Service Manual

Also see for Duplex Unit-A1: Portable manual General Timing Chart/General Circuit Diagram INSTALLATION PROCEDURE

Contents

Canon Duplex Unit-A1 Service Manual Manual pdf 19 page image

Chapter 22-12.1 Basic Construction2.1.1 Outline 0010-4342The operation sequence of the duplex unit is controlled by the duplex controller PCB. An 8-bit microcomputer mounted on the duplex controller PCB controls theoperation sequence of the duplex unit and the serial communication with the DC controller PCB.The duplex controller PCB drives motors in response to various commands sent from the DC controller PCB. The DC controller PCB sends the duplex unit statusback to the printer. The duplex unit is powered by 24 VDC supplied from the power supply kit PCB and +5VDC and +3.3 VDC supplied from the DC controllerPCB.The duplex unit circuit configuration is shown below.F-2-1T-2-12.2 Pick-Up/Feed Systm2.2.1 Outline 0010-4343After the printing paper is fed by the delivery roller in the fixing unit of the host machine, the duplex flapper solenoid (SL1001) turns on to lead the paper to theduplex unit.The printing paper led to the duplex unit is fed by three feed rollers to the printer.The reversal motor (M102) and feed motor (M1001) are stepping motors. The rotation direction of these motors is controlled by the microcomputer (CPU) mountedon the duplex controller PCB.Feed roller 1 is driven by the reversal motor (M1002). Feed rollers 2 and 3 are driven by the feed motor (M1001). The paper transport path is provided with twophoto interrupters, duplex paper sensor 1 (SR1002) and duplex paper sensor 2 (SR1003).M1001 Feed motor SR1002 Duplex paper sensor 1M1002 Reversal motor SR1003 Duplex paper sensor 2SL1001 Duplex flapper solenoidDCcontrollerPCBJ1002J218M1001MJ275J1005M1002MJ276J1006SR1002J273J1003SL1001SR1003J274SLOptionalpowersupplyPCBJ1001J55