Epson Stylus COLOR 3000

EPSON Stylus COLOR 3000
EPSON Stylus Color 3000 Service Manual
2
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C203 Main Control Board
This printer uses C203 Main for the main control circuit board. It consists of the following:
 16-bit CPU 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 shows the allocated functions for major components. Figure 2-15 shows the main control circuit
block diagram.
IC Location Function
CPU IC5  16-bit CPU.
 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 CR motor.
 Manages the sensors.
IC6  Controls the parallel I/F.
 Controls the serial I/F.
 Controls Type-B I/F.
 Controls the PF motor.
 Controls the pump motor.
 Controls black and color printheads.
DRAM IC12  Manages buffers, work area in the CPU.
SRAM IC14, IC28  Manages input buffer.
C.G. ROM IC11  Manages CG (Character Generator).
P-ROM IC13  Manages printer control program.
Optional ROM
IC7, IC10
 For optional fonts and CG (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 (+5V).
IC3  Outputs a reset signal to the power line (+42V).
Common driver
IC
IC22  Produces common voltage for the black printhead.
IC23  Produces common voltage for the color printhead.
Driver IC17  Drives the PF motor.
IC18  Drives the pump motor.
IC25  D/A converter for CR motor control.
IC19, IC20  Drives the CR motor.
Table 2-8. Location and Functions of Major Components