Specifications

EPL-5700 Chapter2 Operating Principles
Rev. A
2-1
7
Main composition elements and functions of C234 Main-B board are
following.
Table 2-8. Main elements of main controller in C234 Main-B board
Name Location Function
CPU
µPD30200GD
IC1 RISC-CPU
ASIC
E05B41BA
IC4 This ASIC controls following;
• Memory control(RAM/ROM)
• DMA control (Video, I/O)
ASIC
E05B41BA
IC10 This ASIC controls following;
• Host I/F control
• Control panel
• Interruption control
ASIC
E05B28KA
IC16 This ASIC controls following;
• RIT(Resolution Improvement
Tech.)/PGI(Photo Grade Improvement)
function control
• Video I/F control(communication with
engine controller)
Program
ROM/Mask
ROM
CN3 DIMM module which stores control
program. Flash-ROM(C215PROG) is built
in the initially mass produced printers.
Mask ROM(C215PROGB) is built in later
mass produced printers.
DRAM IC14/15 2 16Mbit(x16)s are mounted and operates
as standard memory.
Mask ROM IC5/6 2 8Mbit(x16)s are mounted and stores
font data.
EEPROM
NM93C86A
IC9 Memorizes each setting information and
status information with 16Kbit(x16)
capacity.
Option Font
ROM
CN2 Stores optional font in 4MB ROM DIMM.
Table 2-9. Main elements of main controller in C234 Main-B board
Name Location Function
CPU
M38073E4FS
IC201 Engine control
Motor Drive IC
TEA3718SDP
IC204/205 Main motor driving