Outline Of The Electrical Circuitry - Canon NP6251 Service Manual

CHAPTER 2 BASIC OPERATION
B. Outline of the Electrical Circuitry
The machine's major electrical mechanisms are controlled by the microprocessor on
the DC controller PCB:
• Controlling copying sequence
• Controlling high-voltage
• Controlling scanner drive
• Controlling pick-up/feeding
• Controlling the lens motor (X, Y)
• Controlling the blanking exposure LED
• Controlling the analog signal inputs
Thermistor signal
Potential sensor signal
Ambient temperature signal
Manual feed size signal
The machine's control panel is equipped with a dedicated CPU (Q937) which
controls the keys, LEDs, and LCD on the control panel.
The machine communicates with the RDF and the sorter using the communications
IC on its DC controller PCB and the communications IC (IPC) on the controller PCB of
each accessory. (IPC communication 2).
Figure 2-102 is a block diagram which shows the relationship between the machine's
major circuits.
2-2
COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)