Epson EPL-9000, Service Manual

Page: 46 / 162

Service Manual
General Description
1.5.1
MAIN Board
The MAIN board is a video controller board. The primary functions of this board are
receiving print data from the host, generating the print image (video), and sending the print image
to the engine controller via the video interface. A 32-bit 19.2 MHz RISC CPU MB86930
(location: ICI) is used, and the following memory chips and custom
are assigned to the 4
memory space.
Memory chips
Code ROM: four 6,14, 13) or two mask ROM 15)
Font ROM: two mask ROM (M80A76: M80A77:
DRAM 25,26, 27)
16K-bit
■ Custom
Others
RS-232C interface driver/receiver MAX202
interface driver/receiver MC34050
Reset
\
ROMs
I
/ \ \
I
❑ ✌✏✌
CPU
- - - - - - - - . - - - - - - - - -
‘ c ’ - - - ” - - -
:
I
I
1
I
DRAMs
Figure 1-17. MAIN Board
Rev.
1-35