Epson STYLUS CX3500 Service Manual page 78

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