Specifications

EPL-5700 Chapter2 Operating Principles
Rev. A
2-1
6
2.3 CONTROLLER OPERATING PRINCIPLES
C234 Main-B board, the controller of this printer consists of main controller
part and engine controller part. The main controller part processes printing
order from the host computer and generates video signal. The engine
controller part drives the engine according to the video signal from the main
controller and performs printing.
Main functions of the main controller part;
Communication with host computer (Receiving printing data and
sending status)
Processing printing data(Analyzing command and generating video
signal)
Sending video signal to engine controller
Monitoring panel or switch conditions
Main functions of the engine controller;
Receiving the video signal and sending the engine status
Monitoring sensors
Controlling each mechanism of the engine
Controlling the optional lower cassette
CPU
uPD30200GD
ASIC
E05B41BA
ASIC
E05B28KA
ASIC
E05B40BA
DRAM
RAM SIMM
Font ROM
Addr.
Data
Panel
Paralle
RS-232C
EEPROM
CPU
M38073E4FS
Type-B I/F
Optional Font
ROM
Main Controller Part
Pro
g
ramROM/
Mask ROM
En
g
ine part
Engine Controller Part
Figure 2-19. Block Diagram of C234 Main-B circuit board