Epson LQ-2550 Technical Manual page 115

2.3.4.7 PG HP Sensor Circuit
Figure 2-66 shows the PG HP sensor circuit. This circuit determines the platen gap home position of
the PG motor.
Table 2-43 shows the relationship between the PG gear flag and the voltage at the PA1 terminal of
the sub CPU.
At the home position
Outside the home position
PG GEAR
FLAG
n _ _ ,
I
I
I
. '
L – L – J _ – !
Figure 2-66. PG HP Sensor Circuit
Table 243. PG Gear Flag and PA1 Voltage
Gear Flag Position
PG
CN 16
+5
R19
RI 8
R60
CM
1-3
5
o
2-69
SU8 CPU
(7 B)
REV.-A