EPSON Stylus Color 900 Revision C
Operating Principles Electrical Circuit Operation Principles 76
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
Table 2-22 shows the ASIC’s (IC2) conditions for driving the ASF
solenoid.
Table 2-22. Conditions for Driving the ASF Solenoid
Figure 2-21. ASF Solenoid Control Circuit Block Diagram
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
ASIC’s (IC2, 83-pin) condition Solenoid’s condition
High (5 VDC) Inducting
Low (0 VDC) Non-inducting
CN16
GND
2
1
VBB
+42
F4
E05B59(IC2)
ASF_SOL
83
Q9
Q8
Cooling fan
