Outline Of The Electrical Circuitry - Canon NP6330 Service Manual

CHAPTER 2 OPERATIONS AND TIMING
B. Outline of the Electrical Circuitry
The copier's major electrical mechanisms are controlled by a CPU (IC116) operating
in sync with 16MHz external inputs.
Each principal IC on the DC controller PCB has the functions discussed below;
Figure 2-102 is a block diagram showing the relationship among major circuits:
IC116 (master CPU)
• Controlling copying sequence.
IC104 (slave CPU)
• Controlling the control panel.
• Controlling the lower feeder motor, blank shutter motor, and lens motor.
IC115 (gate array)
• Controlling writing to and reading from memory.
• Controlling the fixing heater.
• Controlling the scanning motor.
IC124, IC103 (master ROM, slave ROM)
• Serving as memory for programs.
IC107 (DPRAM)
• Serving as buffer memory between master CPU and slave CPU.
IC109 (I/O port)
• Controlling the high-voltage power supply and lamp regulator.
• Turns on and off each element.
IC117 (IPC)
• Controlling serial communication with the DF, sorter, and pedestal.
IC113 (reset IC)
• Resetting appropriate ICs at power-on or power outage: IC105, IC109, IC115, IC116,
IC117
2-2
COPYRIGHT © 1997 CANON INC.
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CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)