Epson Stylus COLOR 3000, Руководство по обслуживанию, Страница: 56 / 180

EPSON Stylus COLOR 3000
Rev. A
2-15
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