Outline Of The Electrical Circuitry - Canon GP200 Service Manual

3. OPERATIONS AND TIMING
B. Outline of the Electrical Circuitry
1. Control Division
The GP215/GP200's electrical mechanisms are controller by the CPU on the PCBs shown in Figure 3-
102. See Table 3-101 for an idea of the functions of the CPU and the functions of the ROMs/RAMs and
the ICs around the CPU.
a. Image Processor PCB
Name
CPU IC506
ROM ROM
(FLASH ROM) DIMM
IC1
IC2
MASK IC564
ROM
RAM IC650
IC651
DP RAM IC528
3–2
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IC No.
• Controls image processing
• Controls laser operation
• Controls job schedules
• Controls fax sequence
• Controls system memory
• Detects errors
• Controls DC controller PCB communications
• Controls serial communications (for FLASH ROM download-
ing)
• Controls the control panel
• Controls the feeder/editor
• Controls fax communications
• Controls copying sequence
• Controls the power supply
• Controls control panel communications
• Contains control programs
• Controls copying operations
• Controls fax operations
• Control panel message
• Controls fonts (e.g., fonts used for fax headers)
• Stores service mode, user mode, various parameters
• Controls communication with the DC controller PCB
Table 3-101a
CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
Description