Epson STYLUS 3000 Service Manual page 56

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)


2 gate arrays E05B33 (IC6)


P-ROM, DRAM and MROM


Drivers
Table 2-8 and Figure 2-15 show the allocated functions for major components and the main control circuit
block diagram, respectively.
Table 2-8. Location and function of the Major Components
IC
CPU
Gate Array
DRAM
SRAM
C.G. ROM
P-ROM
Optional ROM
EEPROM
Timer counter IC
Reset IC
Common driver IC
Driver
Rev. A
Runs at 19.66 MHz
Manages interfaces, motors and printheads.
E05B45 (IC16)
Produces common voltage for printheads
Drives motors.
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
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 motor.
Manages the sensors.
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.
Manages buffers, work area in the
Manages input buffer.
Manages C.G. (Character Generator).
Manages printer control program.
For optional fonts and
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 (+5 ).
Outputs a reset signal to the power line (+42 ).
Produces common voltage for the black printhead.
Produces common voltage for the color printhead.
Drives the motor.
Drives the pump motor.
D/A converter for motor control
Drives the motor.
EPSON Stylus COLOR 3000
(not attached as a
2-15