C203 Main Control Board - Epson STYLUS COLOR 3000 Service Manual

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)

2 gate arrays E05B33 (IC6)
E05B45 (IC16)

P-ROM, DRAM and MROM

Drivers
Table 2-8 shows the allocated functions for major components. Figure 2-15 shows the main control circuit
block diagram.
IC
CPU
Gate Array
DRAM
SRAM
C.G. ROM
P-ROM
Optional ROM
EEPROM
Timer counter IC
Reset IC
Common driver
IC
Driver
EPSON Stylus Color 3000 Service Manual
Runs at 19.66 MHz.
Manages interfaces, motors, and printheads.
Produces common voltage for printheads.
Drives motors.
Table 2-8. Location and Functions of Major Components
Location


IC5








IC16






IC6












IC12


IC14, IC28


IC11


IC13


IC7, IC10


IC1


IC2


IC9


IC3


IC22


IC23


IC17


IC18


IC25


IC19, IC20
Function
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.
Controls the I/F for the control panel.
Controls the CR motor.
Manages the sensors.
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.
Manages buffers, work area in the CPU.
Manages input buffer.
Manages CG (Character Generator).
Manages printer control program.
For optional fonts and CG (not attached as a
standard item.)
Stores values for the default settings and other
values.
Manages timers for the ink system.
Outputs a reset signal to the logic line (+5V).
Outputs a reset signal to the power line (+42V).
Produces common voltage for the black printhead.
Produces common voltage for the color printhead.
Drives the PF motor.
Drives the pump motor.
D/A converter for CR motor control.
Drives the CR motor.
EPSON Stylus COLOR 3000
2-15