C301Main Board - Epson Stylus Photo 720 Service Manual

EPSON Stylus Photo 720 / EPSON Stylus Photo EX3

2.2.2 C301MAIN Board

The printer mechanism is controlled by C301MAIN. The 3.3V regulator IC 16 is
mounted on the MAIN board and generates +3.3V from 5V. +3.3V is to drive the main
elements on the logic circuit.
See Figure 2-13 for the C301MAIN board block diagram.
Power
CN10
Operating Principles
CR Sensors
Head
P-ROM
(IC3)
D-RAM
CN1 Parallel
(IC17)
Parallel I/F
3.3V
Receiver IC
Regulator
74LV161284
IC (IC16)
(IC9)
ASIC
CPU
Address
E05B70**
HD64F2328
Data
(IC2)
F (IC1)
USB I/F
Receiver IC
(IC10)
CR1
CN3
Figure 2-13. Block Diagram for the C301MAIN Board
Electrical Circuit Operating Principles
CN9 HD FFC
CN8 HD FFC
Q2 & Q3
Batt1
Common
Timer & Driver
Reset IC (IC15)
(IC5)
EEPROM
(IC6)
CN11
CN6
CN4
CN5
HP Sensor
PE Sensor
CR Motor
PF Motor
CN12
CN7
Motor
Driver
(IC13)
Motor Driver
(IC14)
C209 PNL (Stylus Photo 720)
C366 PNL (Stylus Photo EX3)
ASF HP Sensor
Revision A
44