C211 Main Control Board - Epson Stylus COLOR 1520 Service Manual

EPSON Stylus COLOR 1520

2.3.2 C211 MAIN Control Board

This printer uses C211 MAIN for the main control circuit board. It consists of the following:

16-bit CPU C90A02CB (IC7)

2 gate arrays E05B33 (IC6)

P-ROM, DRAM and MROM

Drivers
Table 2-8 and Figure 2-19 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
Gate Array
DRAM
DRAM
MROM
P-ROM
P-ROM
EEPROM
Timer counter IC
Common driver
IC
Common driver
IC
Driver
Driver
2-18
:Running at 19.66 MHz
:Controls interfaces, motors and printheads.
E05B34 (IC5)
:Produces common voltage for the motors and printheads.
Location






IC7




IC5




IC6












IC9


IC10


IC13




IC11


IC14






IC2


IC3


IC18


IC19


IC16


IC17
Function
16-bit CPU
Run at 19.66 MHz
Controls the printer at the gate arrays IC5 and
IC6 according to the program in P-ROM.
Controls the I/F for the control panel.
Controls the CR motor.
Detects the signals from the PE sensor, cover
open sensor and REL (Release) sensor.
Controls the parallel I/F.
Controls the serial I/F.
Controls Type-B I/F.
Controls the PF motor.
Controls black and color heads.
Controls the HP sensor and DE sensor.
Manages buffers, work area in the CPU, and
stuck area.
For image buffer. Expansion
24 Mbit
Manages C.G. (Character Generator).
Equipped only for the European version.
8Mbit
Printer control program
Manages C.G. (Character Generator).
Stores values for the default settings and other
values.
Manages timers for the ink system.
Produces common voltage for the black head.
Produces common voltage f or the color head.
Drives the PF motor.
Drives the CR motor.
Rev. A