Epson ColorPage EPL-C8200 Service Manual page 139

EPSON ColorPage EPL-C8200
Figure 2-54. C287MAIN Board Circuit Diagrams
Chapter 2 Operating Principles
Table 2-25. C287MAIN Board Major Components (1/3)
Components Location
RISC-CPU IC1 A RISC*-type CPU, which operates at 200
R5000-200 MHz (internal) and 3.3V. (External: 66.7
MHz)
*RISC: Reduced Instruction Set Computer
E05B51 (ASIC) IC2 • Interface for the CPU.
*1
Controls the following:
• Memory areas (SDRAM, Code-DIMM,
IPL/FONT ROM, Option ROM DIMM)
• DMA
• CPGI and RIT/CRIT of the E05B64
• Network circuit
• Optional HDD (Hard Disk Drive)
E05B64 IC24 Manages the following:
• CPGI (Color Photo & Graphics
Improvement)
• PGI (Photo & Graphics Improvement)
• CCNV (Color CoNVersion) (RGB ->
CMYK)
• RIT/CRIT (Color RIT)
• Controls video signals
• Video I/F for the engine controller board
(MCU PWB)
E05B40 *1 IC21 Manages the following:
• Controls the IEEE1284 Parallel B
• Controls the EEPROM (IC20)
• Controls the I/O of the control panel
• Controls the Type-B I/F board
E05B52 *1 IC19 Interface for E05B51 and E05B40
IPL/CG IC13/14 • IPL and FONT (upper 16BIt data / lower
16Bit data)
• Two 512kbit x 16bit (1MB) mask ROMs
are directly attached.
*1: Common to the EPL-C8000.
*2: The number of the C287MAIN circuit diagram to refer to.
Revision A
IC
Refer to:
Function
*2
1/7
1/7
5/7
4/7
4/7
2/7
2-76