Electrical Circuitry; Outline; Mfc Pcb; Image Processor Pcb - Canon GP605 Service Manual

CHAPTER 2 BASIC OPERATIONS
B.

Electrical Circuitry

1.

Outline

The copier's major electrical mechanisms are controlled by the CPU on the MFC PCB, image
processor PCB, and DC controller PCB. The following tables show the control functions assigned
to each CPU and the ICs and their functions used around the CPUs (RAMs, DIMMs).
2.

MFC PCB

Name
CPU • Controls the control panel, hard disk, and personal box image management.
• Controls job management, operation status management, and log management.
• Controls PDL image transfer sequence.
• Controls PDL-image processor PCB communications and service mode.
RAM • Stores service mode data. (For details, see E. "Backup Battery" in Chapter 9 "Externals and
Auxiliary Control.")
• Stores user mode data. (For details, see E. "Backup Battery" in Chapter 9 "Externals and
Auxiliary Control.")
DIMM • Controls programs.
3.

Image Processor PCB

Name
CPU • Controls the fixing temperature, original scanning lamp, high voltage, potential, and toner
supply.
• Controls paper feeding, image processing, scanner reading, and copying sequence.
• Controls printing sequence, output management, and ADF.
• Controls the sorter (accessory) and communications control device (accessory).
• Controls the page memory management mechanism and hard disk image input/output.
• Controls service mode.
RAM • Stores service mode data. (For details, see E. "Backup Battery" in Chapter 9 "Externals and
Auxiliary Control.")
• Stores user mode data. (For details, see E. "Backup Battery" in Chapter 9 "Externals and
Auxiliary Control.")
• Stores pickup/delivery counter readings.
DIMM • Controls programs (used to control the input/output ports on the DC controller PCB).
2-2
COPYRIGHT © 1999 CANON INC.
Description
Table 2-101 Control Items
Description
Table 2-102 Control Items
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)