Epson EPL-N1200, Service Manual

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Table 2-2 lists the functions of the C205 MAIN board main elements.
Table 2-2. Functions of C205 MAIN Board Main Elements
Element Location Function
MB86930 RISC CPU IC15
The CPU, which operates at 20 MHz, manages the video
controller operation.
E05A91 ASIC IC1
This ASIC contains the following functions:
Address decoding
DRAM management (refresh control,
RAS/CAS control)
E05B31 ASIC IC38
This ASIC contains the following functions:
Video signal processing
E05A93 ASIC IC11
This ASIC contains the following functions:
Video interface
Parallel-B interface
Serial/LocalTalk I/F board interface
Type-B interface card control
Control panel control
E05B17 ASIC IC16
This ASIC contains the following functions:
BiRITech
E05B27 ASIC IC43
This ASIC contains the following functions:
Parallel-C interface
Two 8 M-bit ROMs IC12,13 These ROMs are code ROM.
Two 8M-bit ROMs IC32,33 These ROMs are font ROM.
Option 8M-Bit ROM IC6 This ROM is a local language ROM option for fonts.
EEPROM IC5
This 1 K-bit EEPROM stores the following:
Model type
Printed page counter value
Toner life counter value
Jam counter value
SelecType setting
SRAM IC17 It provides working memory area for E05B17.
DRAM
IC18,19,20,
21 These DRAMs are used as the working area of the CPU:
input buffer, image buffer, etc.
Operating Principles EPL-N1200 Service Manual
2-18 Rev. A