Figure L-20. Control Panel; Video Controller Operation - Epson H5200 - TM B/W Thermal Line Service Manual

Operating Principles

2.2 VIDEO CONTROLLER OPERATION

section is separate in the C108 MAIN board, the C82907" ROM-B board (if installed), and the
The control panel is comected to the engine controller board (PWB-A), but is
control panel.
controlled MAIN board, which sends the signals for the control panel through the
by the C108
engine controller board.
. . - .
ROM-B
Board
2.2.1 CI08 MAIN Board Operation
Figure 2-36 shows a block diagram of the C108 MAIN board. The C108 MAIN board contains the
video controller, which consists of a 16-bit 68000 (16.67 MHz) CPU, the standard cells developed for
this printer, DRAMs, ROM, and a 16K-bit EEPROM.
CPU
68000
A
Option l/F
Figure 2-36. C108 MAIN Board Block Diagram
2-16
Controller
Video
. - . - - - - - . * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Engine
Controller
Board
Video Controller Section
Figure 2-35.
I
.
I
I
Section
MAIN Board
:
, Control
: Panel
,
.
HP Font
Cartridge
A I
Video
Parallel l/F
ADDRESS
DATA
CONTROL
Video
Rev. A