EPSON Stylus COLOR 3000
Rev. A
2-1
2.3.2
MAIN Control Board
This printer uses MAIN for the main control circuit board. It consists of the following:
16-bit H8S/2655 (IC5) Runs at 19.66 MHz
2 gate arrays E05B33 (IC6) Manages interfaces, motors and printheads.
E05B45 (IC16)
P-ROM, DRAM and MROM
Drivers Produces common voltage for printheads
Drives motors.
Table 2-8 and Figure 2-15 show the allocated functions for major components and the main control circuit
block diagram, respectively.
IC Location Function
CPU IC5
16-bit
Runs at 19.66 MHz
Controls the printer at the gate arrays IC5 and IC6
according to the program in P-ROM.
Monitors the printhead temperature.
Gate Array IC16 Controls the I/F for the control panel.
Controls the motor.
Manages the sensors.
IC6 Controls the parallel I/F.
Controls the serial I/F.
Controls Type- I/F.
Controls the motor.
Controls the pump motor.
Controls black and color printheads.
DRAM IC12
Manages buffers, work area in the
SRAM IC14, IC28 Manages input buffer.
C.G. ROM IC11 Manages C.G. (Character Generator).
P-ROM IC13 Manages printer control program.
Optional ROM
IC7, IC10
For optional fonts and (not attached as a
standard item.)
EEPROM IC1 Stores values for the default settings and other
values.
Timer counter IC IC2 Manages timers for the ink system.
Reset IC IC9
Outputs a reset signal to the logic line (+5 ).
IC3
Outputs a reset signal to the power line (+42 ).
Common driver IC IC22 Produces common voltage for the black printhead.
IC23 Produces common voltage for the color printhead.
Driver IC17
Drives the motor.
IC18 Drives the pump motor.
IC25
D/A converter for motor control
IC19, IC20
Drives the motor.
Table 2-8. Location and function of the Major Components
