Epson Stylus CX4905 - Page 89

EPSON Stylus CX4900/CX4905/CX5000/DX5000/DX5050/CX5900/CX6000/DX6000/DX6050 Revision A
OPERATING PRINCIPLES Electrical Circuit Operating Principles 89
The block diagram for the sensor circuit is shown below.
Figure 2-21. Sensor Circuit Diagram
AIN2
EA_CR
EB_CR
EA_PF
EB_PF
B9
B6
A5
A17
B17
CPU
(IC8)
PF Encoder
(P1)
PE
PG
SCNHP
AIN1
D17
D6
D18
C9
1
7
3
8
6
4
5
2
PW
EVDD
LEDON
ENCA
ENCB
NC
GND
GND
PEV
GND
PE
PG
GND
PEV
GND
SCN_HP
XHOT/
THM
3
2
1
1
2
3
2
1
1
VOA
VOB
VCC
GND
A
A
+3.3V_SN
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V_SN
+3.3V
+3.3V_SN
+3.3V_SN
CN7
• PW Sensor
• CR Encoder
Sensor
CN13
Scanner HP
Sensor
CN5
THM
CN4
PG Sensor
CN3
PE Sensor