Epson SEIJ98006 ASF Solenoid Driver Circuit, 21. ASF Solenoid Specifications, EPSON Stylus Color

EPSON Stylus Color 900 Revision C

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	Specifications
1	Type	Single-phase DC solenoid
2	Drive voltage	42 VDC ± 5%
3	Coil resistance	588 Ω ± 10% (at 20 °C)
4	Induction	0.98 N (100 gf) or more

Table 2-22 shows the ASIC’s (IC2) conditions for driving the ASF solenoid.

Table 2-22. Conditions for Driving the ASF Solenoid

E 0 5 B 5 9 ( I C 2 )

8 3	Q 8
A S F _ S O L

+ 4 2

F 4

C o o lin g

Q 9	C N 1 6
	2 G N D
	1 V B B

ASIC’s (IC2, 83-pin) condition	Solenoid’s condition
High (5 VDC)	Inducting
Low (0 VDC)	Non-inducting

Figure 2-21. ASF Solenoid Control Circuit Block Diagram

Operating Principles Electrical Circuit Operation Principles 76