Samsung ML-1610XBH Service Manual

Also see for ML-1610 Series: Manual Manual Del Usuario User manual Service manual User guide

Contents

Samsung ElectronicsService ManualSystem Overview3-143.2.4 Sensor Controller3.2.4.1 Paper Feeding/WidthWhen a paper passes an actuator of a feed sensor unit after feeding a paper into a set,it detects a signal ofthe photo interrupter and informs the paper feeding status to CPU. After sensing the signal and certain timelater, it strews an image data.(Related in Paper Front Edge Adjustment)If it could not detect the feed sensor within 1 second after feeding a paper, a paper jam0 (CPU#_) occurs.ML-1610 differs from other general printers because it doesn’t have a paper empty sensor. It recognizesthe paper existing status by using a firmware. If a paper is not fed, it recognizes the state as no paper (Redand Yellow lights turn on among other LEDs). With the same principle, it senses the OPC unit. After OPCunit is mounted,the actuator operates. When it passes the actuator of sensor unit, it detects the signal ofthe photo interrupter, informs the existing OPC unit to CPU, and then stays at the status.3.2.4.2 Paper Empty SensingThe paper empty is detected by the empty sensor mounted to an engine board and the actuator mountedto a frame. Paper senses the on/off time of the empty sensor by using CPU and informs the normaloperation status and the jam occurrence status to CPU.3.2.4.3 Jam Cover/Cover Open SensingML-1610 uses two M/S:one senses the cover open and the other senses the jam cover open.The cover open sensor is located on the left bottom of HVPS.When the front cover is open, +24V suppliedto each unit (DC fan,Solenoid,Main Motor,Polygon Motor Unit of LSU in Fusing Unit,and HVPS)isinterrupted.The jam cover open sensor is located on the left bottom of SMPS. When the jam cover is open, +24Vsupplied to each unit (DC fan, Solenoid, Main Motor, Polygon Motor Unit of LSU in Fusing Unit, and HVPS)is interrupted.D0 bit of CPU detects the jam cover open/cover open, and D7 bit of CPU detects the existence of OPC.In this case, it informs the status to user by turning on the red LED among OP panel LEDs.3.2.4.4 Solenoid Driving CircuitThe solenoid consists of two used for paper pick-up and MP signal. D4 bit of CPU turns it on/off, and itsdriving time is 300ms. The diode protects the drive TR from the pulse (noise)generated by de-energizingoperation of solenoid.