Service manual

EPSON Stylus CX3500/CX3600/CX3650/CX4500/CX4600 Revision A
OPERATING PRINCIPLES Electrical Circuit Operating Principles 78
The block diagram for the sensor circuit is shown below.
:
Figure 2-22. Sensor Circuit Diagram
CN4
Scanner HP
Sensor
CN7
• CR
Encroacher
Sensor
• PW Sensor
• CSIC
CVDD
CO
CCLK
CDIO
CXRST
AN20
EA_CR
EB_CR
EA_PF
EB_PF
A12
A10
B12
B11
A11
B5
B10
A9
A16
B16
CPU
(IC8)
PF Encoder
(P1)
PE
PG
SCNHP
AN1
D5
C5
F20
A5
5
1
6
2
3
13
10
15
11
9
CVDD
COI
CSCK
CSDA
CRST
PW
ENDD
LEDON
ENCA
ENCB
PEV
GND
PE
3
2
1
1
2
3
2
1
10
CN5
THM
CN4
PG Sensor
CN3
PE Sensor
VOA
VOB
VCC
GND
VOA
VOB
VCC
GND
A
A
+3.3V_SN
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V_SN
+3.3V+3.3V +3.3V
+3.3V_SN