CHAPTER 2 BASIC OPERATIONCOPYRIGHT © 1999 CANON INC. CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)2-2B. Outline of Electric CircuitryThe NP6320’s main mechanisms are controlled by the microprocessor, PROM, and EEPROMon the DC controller PCB.1. Microprocessor (Q303: master)• controls the copying sequence• controls the control panel• controls the main motor/scanner motor• controls the scanning lamp• controls the serial communication with the ADF• reads analog signals2. PROM (Q318)• contains sequence programs3. EEPROM (Q315)• stores data that can be modified in the service mode (replaces conventional variable resistorsand switches)4. Microprossor (Q305: slave)• controls the document size identification• controls the serial communication with the sorter• controls the fans• controls the paper deck pedestalNote:EEPROM is a type of ROM in which data may be erased or stored newly.For this reason, the NP6320’s RAM and ROM are not backed up by a lithium battery.Note:The NP6320 is equipped with an A/D converter and, therefore, its microprocessor can readanalog signals.Note:The main motor (M2) is a stepping motor that uses the oscillation frequency of the crystaloscillator on the power supply assembly.The main motor (M1) is a brushless motor.
