Specifications

Appendix B
LQ-570+/1070+ Control Circuit Operation
The control circuitry consists of two boards: the Cl07 MAIN board and the
CO62 PNL board (the control panel).
The printer’s CPU is an 8-bit CPU TMP9OCO41 running at 10 MHz. It oversees
control of all the components of the printer.
The E05A50 gate array contains various
memory management functions that control the assignment of the memory and I/O
areas, and it controls a head gate array IC2 (E05A86), a PU1501 or SW-67129 for
the PF and CR motor driver, STA475A(IC4
IC9) is transistor array for the head
pins drive, several sensor circuits and so on. Figure B-2 shows the block diagram of
the Cl07 Main Board.
CO62 PNL Board
JlizEl-~:~?!~2 ._-.--._ -..-..-..-_.-
v
PF Motor
+
‘I
,
v
HP Sensor
Rear PE Sensor
Release Sensor
ir
f
Front PE Sensor Platen Gap !Senaor
Figure B-2. Control Circuit Block Diagram
B-6
Epson LQ-570+/1 070+