Asf Solenoid Driver Circuit - Epson Stylus COLOR 900 Service Manual

EPSON Stylus COLOR 900/900N

2.3.10 ASF Solenoid Driver Circuit

A solenoid switches the planetary gear train between the ASF and the
pumping mechanism. The figure below shows the solenoid driver circuit
block diagram.
Figure 2-23. ASF Solenoid Driver Circuit Block Diagram
The output signal from IC2 and its effect on the solenoid are shown in
the table below:
Table 2-17. Conditions for Driving the ASF Solenoid
IC2 output (pin 83)
High (5 VDC)
Low (0 VDC)
Solenoid's operation
On
Off
The solenoid's specifcations are included below:
Table 2-18. ASF Solenoid Specifications
Item
Drive voltage 42 VDC
Coil resistance 588
Induction 0.98 N (100 gf) or more
Chapter 2 Operating Principles
Specifications
±
5%
Ω ± °
10% (at 20 C)
60