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Epson LX-810 - Page 77

Epson LX-810
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REV.-A
2.2.5.5
Printhead
Drive Circuit
The drive pulse width is adjusted using CPU port PC6.
+24V
J
8
0
HDCOM
I
11
GA
O
HD1
HD1
63
R20,,,
IK
D1647 Q7
5
E05A30
o
HD2
HD2
62
R21,,,
IK
D1647
Q9
(3
B)
9
*
o
HD3
HD3
61
R22,kh
1 K
D1647 Q8
3
0 HD4
HD4 60 R23A,, 1 K
D1647
Q1O
10
0
HD5
HD5 59
R24,,,
IK
D1647
Q12
1
0 HD6
HD6 58
R25,,,
1
K
D1647
QI
1
12
0
HD7
HD7
‘
R26&,,
IK
D1647
Q13
2
0
HD8
HD8
2
R27,,,
1 K
4
0
HD9
3
R28,,,
1 K
HD9
I
+’
GP
Figure 2-44. Printhead Drive Circuit
I
[
I
1
I
J
1
J
20V
0.5
ms
CN8
HEAD
Figure 2-45. Printhead Driving Waveforms
2-41

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