(Paper release operation) The lock lever arm is always pressed onto the paper release lever by th e sp r in g. * The pickup solenoid operates on 24V and turns ON/OFF paper feed operation. Operation * The main motor is a 4-phase stepping motor of 2-phase excite- ment bipolar system, which serves as the drive source of the paper feed and transport system. (Capacity: XXX sheets) 4 Paper release lever Put this lever s. Parts Note Code Signal name Name Type Function/operation Active condition 1 PE SENSOR PEMP IN Paper empty detector Photo transmission sensor Detects paper on the paper tray. The paper feed operation is controlled by the paper feed roller clutch and the paper feed roller clutch solenoid. The paper is passed to the transfer section by the paper feed roller. Paper feed, paper transport section (1) Outline The paper feed tray contains about 200 (250) sheets of paper. (Image data)(VIDEO) P3) The data are sent through the data select section to the scan- ner (writing) section.
(Image data (Data 1 – 8) P2) Print data are developed by the ASIC and the line memory and converted into the full dot image data and sent to the data select section. (2) Printer mode P1) Print data (compressed data) are sent from the host.
1) Paper feed (Paper on the paper tray is fed to the transfer section by the paper feed roller.) 2) Image transfer (The toner image on the photoconductor is trans- ferred onto the paper by th. Paper path and imaging Paper is fed, transported, and discharged through the path indicated with the arrow in the figure below. MCU (ICU) PWB The image data from the scanner (reading) section are converted i. Scanner (read) section In this section, the copy lamp (cathode ray tube, Xenon lamp) radiates light onto a document, and the reflected light is detected by the image sensor (CCD element) to convert into electrical signals (analog signals), which are sent to the MCU PWB. B l oc k di ag ra m CCD CPU ASIC MEMORY MEMORY ICU PWB ASIC HOST(PC) KEY AC POWER Control signal, detection signal, drive signal, control data line Image data signal line Image (light) Power line Paper path line OPERATION PWB LAMP (LED) MAIN MOTOR PRINT PWB SCANNER HOME POSITION SENSOR COPY LAMP LIGHT QUANTITY SENSOR MIRR. Parts marked with " ! " is important for maintaining the safety of the set. The contents are subject to change without notice. SER VICE MANU AL CODE: 00ZA L840/ /B1E BASIC MANUAL DIGIT AL COPIER MODE L AL-800/840 SHARP CORPORATION This document has been published to be used for after sales service only.
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