Asf Solenoid Driver Circuit - Epson SEIJ98006 Service Manual

EPSON Stylus Color 900

2.3.8 ASF Solenoid Driver Circuit

A planetary gear is used in the gear train which switches between paper
feed operation from the ASF and pump operation. The switching action
is enabled by the solenoid. See Table 2-21 and Figure 2-21 which show
ASF solenoid specifications and the ASF solenoid control circuit block
diagram, respectively.
Table 2-21. ASF Solenoid Specifications
No. Items
1 Type
2 Drive voltage
3 Coil resistance
4 Induction
Table 2-22 shows the ASIC's (IC2) conditions for driving the ASF
solenoid.
Table 2-22. Conditions for Driving the ASF Solenoid
ASIC's (IC2, 83-pin) condition
High (5 VDC)
Low (0 VDC)
Operating Principles
Specifications
Single-phase DC solenoid
42 VDC 5%
588 10% (at 20 C)
0.98 N (100 gf) or more
Solenoid's condition
Inducting
Non-inducting
Electrical Circuit Operation Principles
Figure 2-21. ASF Solenoid Control Circuit Block Diagram
Revision C
76