Printhead Drive Circuit - Epson LX-HOO Technical Manual

2.4.7.3 Printhead Drive Circuit

Figures 2-32 and 2-33 show the printhead drive circuit and the waveform of the drive voltage.
Waveform
Drive Transistor
Collector Voltage
Waveform
2.4.8 Print Timing Control
This section describes the print timing control for the carriage and printhead and the bidirectional logic
seeking function.
2.4.8.1 Print Timing Control for the Carriage and Printhead
The phase switching of the carriage motor and the printhead driving are controlled by the CPU, and
the relationship between the two is shown in Figure 2-34.
HDn
R52
E05A03
(3B)
R61
IK
Fig. 2-32. Printhead Drive Circuit
Fig. 2-33.
Solenoid Current and Drive
CN4
I
GP
Voltage Waveforms
2-34
Solenoid
Coil
C=approx. 1.11 ms