Epson EPL-9000 Service Manual page 76

OperatingPrinciples
Table 2-2 lists the functions of the
Table 2-2. Functions of
Location
MB86930 RISC
ICI
CPU
8M ROMs or IC1615 or
four ROMs
4M
Two ROMs
BM ROM
27
2-24
MAIN board main elements.
MAIN Board Main Elements
The CPU, which operates at 19.2 MHz, manages the video
controller operation.
This contains the
Address decoding
. DRAM management (refresh control,
This contains the
video signal processing
.
EMGTech
This contains the
Video interface
interface
interface
. LocalTalk module control
. Type-B interface card control
Control panel control
These ROMs are code ROM.
,
30 These ROMs are font ROM.
This ROM is
This
. Model type
. Printed page counter value
. Toner life counter value
. Jam counter value
25,26, These DRAMs are used as the working area of the CPU:
input buffer, image buffer, etc.
This changes the
This changes the
Function
functions:
control)
functions:
functions:
interface
language ROM (fonts) option.
stores the
setting
signal level.
signal level.
Rev.