Epson LQ-2550 Technical Manual page 150

REV.-A
2.3.9 PT/RL/LD Solenoid Drive Circuit
Figure 2-96 shows the PT/RL/LD solenoid drive circuit, Table 2-59 lists the related factors for PT/RL/LD
solenoid control, and Figure 2-96 shows the PTsolenoid drive circuit pulse timing.
Each solenoid drive circuit is turned on and off directly by the sub
RL SOLENOID d
Table 2-59. Related Factors for PT/RL/LD Solenoid Control
Solenoid
PT
RL
LD
+35
Figure 2-96. PT/RL/LD Solenoid Drive Circuit
Sub CPU control port
5 "
o
20
0
Figure 2-97. PT Solenoid Drive Circuit Pulse Timing
CPU (7 B).
5B
Solenoid state
HIGH Not driven
LOW Driven (35 @/J)
HIGH Not driven
LOW Driven (35 M)
HIGH Not driven
LOW Driven (35 M)
2-104
/
5
SUB CPU
(7 B)
6
7
\