Epson EPL-9000 Service Manual page 75

Service Manual
2.2
VIDEO CONTROLLER OPERATION
The video controller section generates the video signals for the received data. The video controller
section is separate in the
2.2.1 MAIN Board Operation
Figure 2-36 shows a block diagram of the
video controller, which consists of a
standard cells developed for this printer, DRAMs, ROM, and a
ROM
CPU
[ICI)
1
1
Figure 2-36.
Rev.
MAIN board and the control panel.
Video Controller Section
, ------------- ------------------ . . . . . . . . . . .
,
.
,
,
.
. ,
, ,
MAIN Board
.
,
,
.
, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2-35. Video Controller Section
ROM
15 or
30)
1
T
I 1 !
7)
Data
Address
MAIN Board Block Diagram
,
,
Control
: Panel
*
.
,
,
,
. . . . . . . . . . . .
MAIN board. The
19.2 MHz, 32-bit bus)
Option
Board
I
A 1
Operating Principles
,
. ,
,
0
,
, ,
,
,
,
,
, ,
, ,
,
. ,
.
:
:
,
,
,
,
MAIN board contains the
CPU, the
ADDRESS
DATA
CONTROL
Local
Type B
Talk
Specific
Local
Talk
2-23