Epson 440 - Manual (Page 62)

EPSON Stylus Color 440/640/740 Revision A
Chapter 2 Operating Principles 62
2.2.3 C256 Main (for Stylus Color 640)
Various DC voltage generated on the C206 PSB/PSE board is added
various signals in order to drive the printer function on the C256 main
board, and the drive of CR/PF (Pump) motor and printing head is
performed. Following figure shows the circuit diagram for Stylus Color
640.
Figure 2-18. C256 Main Board Block for Stylus Color 640
TPM95C061
(IC1)
Address
Data
Address
Data
Reset IC
(IC9)
CR1
Timer
Counter
(IC10)
Batt1
EEPROM
(IC11)
CN1 Parallel
Common
Driver
(IC7)
Q7&Q9
Head CN8 HD FFC
Motor
Driver
(IC14) Motor
Driver
(IC15)
PF Motor
CR Motor
CN6
CN7
C206 PNL
CN3
CN11
ASF Sensor
CN5
HP Sensor
CN4
PE Sensor
E05B43
(IC2)
Transceiver
(IC16)
CN2 Serial
P-ROM
(IC3) D-RAM
(IC5)
M-ROM
(IC6)