BOARD
ASSEMBLY,
MAIN (Main Control Circuit Board)
Basically, the same board layout is used in both the 136-column model and the 80-column model. The CPU
on this board controls all the main functions of the printer.
It consists of a
8-bit CPU, an
E05A55YA gate array, an
a PSRAM, a MASK ROM, motor drivers, and head drive transistors.
PF MOTOR
DRIVER
CPU
476H
TM
l/F
o
CR MOTOR
\
\
RAM
o
0
/ I +7
‘
OM
— —
T
/
“
HEAD DRIVE
I
TRANSISTOR . .
for OPTION
o
0
GATE ARRAY
<136-column model>
PF MOTOR
DRIVER
CPU
TM
l/F
CR MOTOR
\
RAM
I
“
-
MASK ROM
for OPTION
o
0
HEAD
DRIVE
GATE ARRAY
TRANSISTOR
model>
l/F
Figure 1-12. BOARD ASSEMBLY,
MAIN (Main Control
1-29
Содержание FX 1170 - B/W Dot-matrix Printer
Страница 1: ...EPSON EPSON TERMINAL PRINTER FX 870 1170 SERVICE MANUAL 4001461 REV A ...
Страница 5: ... f REVISION SHEET REVISON DATE ISSUED CHANGE DOCUMENT A June 15 1992 1st issue 7 v ...
Страница 11: ...REV A 4 80 column model 136 column model Figure 1 1 External View of the FX 870 1170 r 1 2 ...
Страница 128: ...REV A Figure 6 1 Lubrication Points 6 3 ...
Страница 134: ...d 4 r I m 0 C2 c O EN l I t J 1 I I m I I k I 1 _ m u Figure A 4 BOARD ASSEMBLY C076 PSB Circuit Diagram Annotated A 7 ...
Страница 135: ......
Страница 136: ......
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Страница 138: ...EPSON ...