Service Manual
Operating Principles
2.2
VIDEO CONTROLLER OPERATION
MAIN Board
The video controller section generates the video signals for the received data. The video controller
section is separate in the
MAIN board and the control panel.
Video Controller Section
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0
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,,
●
,,
,. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Control
:
: Panel
:
*
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Figure 2-35. Video Controller Section
2.2.1
MAIN Board Operation
Figure 2-36 shows a block diagram of the
MAIN board. The
MAIN board contains the
video controller, which consists of a
19.2 MHz, 32-bit bus)
CPU, the
standard cells developed for this printer, DRAMs, ROM, and a
CPU
[ICI)
ROM
ROM
Option
15 or
Board
30)
1
A
1
I
T
1
ADDRESS
DATA
CONTROL
1
I
1
!
7)
Data
Address
Type B
Specific
Figure 2-36.
MAIN Board Block Diagram
Local
Talk
Local
Talk
Rev.
2-23
Summary of Contents for EPL-9000
Page 1: ...EPSON TERMINAL PRINTER SERVICE MANUAL EPSON ...
Page 8: ...REVISION SHEET Revision Date Rev 5 1994 Revision Page I issue vii ...
Page 117: ...Disassembly and Service Figure 3 50 Removing the ROS Unit 3 32 Rev ...
Page 118: ...Chapter 4 Adjustments Adjustment is required in this product ...
Page 160: ...Service Manual Appendix 0 c 1 R13 J Figure A 6 C135 MAIN Board Component Layout Rear Side Rev ...
Page 161: ......
Page 162: ...EPSON ...
