Printhead Drive Circuit - Epson LQ-510 Technical Manual

REV.-A
PRINCIPLES OF OPERATION

2.3.6.5 Printhead Drive Circuit

The drive pulse width is adjusted using CPU port PC6. The Vx voltage is used to pull up the output signals
from the gate array in order to prevent printhead malfunctions.
+5v
CPU
P C 6
Figure 2-64. Printhead Drive Circuit
2 V / D I V
Figure 2-65. Printhead Driving Waveforms
LQ-510
2-58