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