Controller Operating Principles - Epson ColorPage EPL-C8200 Service Manual

EPSON ColorPage EPL-C8200

2.8 Controller Operating Principles

This section describes the C287MAIN board, the MAIN CONTROLLER
PWB of the EPL-C8200.
The CONTROLLER PWB (C287 MAIN Board) consists of three
versions due to the available kinds of paper in the market. (Refer to
Table 2-24.)
Table 2-24. Three varieties of C287 MAIN Board
Market Part Number
Europe 2032287
North America 2032288
China, Taiwan, 2032289
Korea
Note 1:Either A4 or Letter is selected for the default and cassette paper
size.
Note 2: Either A4 or Letter is selected for the cassette paper size.
The main functions of the C287MAIN board are as follows:

Processing print commands and print data sent from the host
computer.

Producing image video signals

Controlling and driving each mechanism in the engine to print
image on paper, synchronizing with the signals from the engine
controller side (MCU PWB).
Chapter 2 Operating Principles
Default Paper Default Paper
Size i *1) Size II*2)
A4 EXE
Letter EXE
A4 B5
The printer uses a data bus 64-bit RISC CPU "R5000-200MHz" for the
processor. A168-pin SDRAM module (CLK:66.7MHz), which is
becoming one of the major modules used for desk top personal
computers, is used for memory. Combining those equipments, the
printer has succeeded in processing data on the C287MAIN board at a
higher speed.
To run one page of color image, the printer generally processes more
than 4 times as large data as for monochrome image. This printer,
however, has a high speed image processor ASIC (E05B64) on the
C287MAIN board. Since the ASIC allows the printer to give less duty to
the PC as well as to the CPU on the C287MAIN board, the printer
manages to process color image data at a higher speed than ever.
For communication with the host, this printer has a built-in parallel
interface and network interface (10BASE-T/100BASE-TX).
See Figure 2-54 for the C287MAIN board circuit diagram and Table
2-25, Table 2-26, and Table 2-27 for the major components on the
C287MAIN board and their functions.
Revision A
2-75