CHAPTER 2 BASIC OPERATIONCOPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)2-2B. Outline of Electric CircuitryThe NP-6317's main mechanisms are controlled by the microprocessor, PROM, andEEPROM on the DC controller PCB.1. Microprocessor (Q300)• controls the copying sequence• controls the control panel• controls the main motor/scanner motor/mirror motor• controls the scanning lamp/fuser lamp• reads the analog signals2. PROM (Q301)• contains the sequence program3. EEPROM (Q317)• stores data that can be modified in the service mode (replaces conventional variable resistorsand switches)Note:EEPROM is a type of ROM in which data may be erased or stored newly.For this reason, the NP-6317's RAM and RAM are not backed up by a lithium battery.Note:The NP-6317 is equipped with an A/D converter and, therefore, its microprocessor can readanalog signals.Note:The main motor (M1) is a brushless motor.The scanner motor (M2) and mirror motor (M3) are stepping motors which use the oscillationfrequency of the crystal oscillator on the DC controller.
