C301Main Board - Epson Stylus COLOR 670 Service Manual

EPSON Stylus COLOR 670

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.
Power
CN10
Operating Principles
CR Sensors
Head
P-ROM
(IC3)
Batt1
D-RAM
CN1 Parallel
(IC17)
Parallel I/F
3.3V
Receiver IC
Regulator
74LV161284
IC (IC16)
(IC9)
ASIC
CPU
Address
E05B70**
HD64F232
Data
(IC2)
8F (IC1)
USB I/F
Receiver
IC (IC10)
CR1
CN3
Figure 2-13. Block Diagram for the C301MAIN Board
Electrical Circuit Operating Principles
See Figure 2-13 for the C301MAIN board block diagram.
CN9 HD FFC
CN8 HD FFC
Q2 & Q3
Common
Timer & Driver
Reset IC (IC15)
(IC5)
Motor
Driver
EEPROM
(IC13)
(IC6)
CN11
C209 PNL (Stylus Photo 720)
CN6
CN4
CN5
ASF HP Sensor
HP Sensor
PE Sensor
CR Motor
PF Motor
CN12
CN7
Motor
Driver
(IC14)
Revision A
45