Control Circuit - Epson LQ-1050 Technical Manual

2.3.10
Figure 2-73 shows a block diagram of the
in the head data control gate array E05A02LA (3A) by the CPU. The
(for 24 dots), and then sends a
control circuit. When this pulse HPW goes
coils are activated and the printer starts printing. The power supplied to the
must be tightly controlled so as not to burn the coils. Therefore, the
and the temperature within the
A NO
CPU
( 7B)
AN
I
P C 6
5
MMU
AO C
AD C
Refer To Section

Control Circuit

r - - - - — -
1
TEMPERATURE
L - -
- - - - - -
r
DC
MONITOR I NG
I
CI
l,- - - - - - -
2 . 3 . 5 .
Fig. 2-73.
control circuit. In this circuit, the print data is stored
drive pulse to
the
and feeds this information to the control circuit.
I
+35
SURGE
t- 1117
Control Circuit Block Diagram
2-69
sends three sets of 8-bit data
drive pulse width
drive transistors controlling the
monitors the +35 VDC line
I I
P,
REV.-A
coils
VOLTAGE