Home switch, tacho-generator in common (GND)
Thermal head drive (8 wires)
Thermal head common
Tacho-generator signal
Motor drive output (
−
)
Home switch signal
Motor (
+
)
Figure 6-2 Sample Circuit Block Diagram (G Head-mounted Printer)
Motor drive circuit
8-input
transistor
array
Thermal head
drive circuit
(Trans
is
tors
)
TG waveform
shaping circuit
Printing pulse
width control circuit
Motor
control
signal
Print data
Digit
setting
jumper
terminal
+
5V power
D
0
to D
7
8-bit
par
allel
data
6-3
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