EPSON FX-2180 Service Manual

Chapter 2 Operating Principles

 

 

The table below identifies and describes the main components of the control circuit on the C244 MAIN board.

Table 2-3. Main Components of the Control Circuit

Component

 

IC

 

 

Function(s)

 

 

 

 

 

 

Gate array

 

IC1

 

System control

(E05B50**)

 

 

 

Peripheral device control

CPU

 

IC2

 

Receives data from the host

(TMP96C141BF)

 

 

 

 

computer and sends it to the input

 

 

 

 

 

buffer in RAM

 

 

 

 

Extends the input data held in the

 

 

 

 

 

buffer to create image data

 

 

 

 

Loads image data to the image data

 

 

 

 

 

buffer

 

 

 

 

Transfers image data to the print

 

 

 

 

 

head

1 Mbit / 4 Mbit

 

IC3

 

Contains the buffer and the working

PS-RAM

 

 

 

area

2 Mbit PROM

 

IC5

 

Contains the character tables and the

 

 

 

 

program that runs the CPU

Serial EEPROM

 

IC8

 

Contains data including:

(AT93C46)

 

 

 

Default setting values

 

 

 

 

Market data

 

 

 

 

Mechanism and print head

 

 

 

 

 

parameters

SLA7024M

 

IC9

 

Driver circuit for the CR motor

A2917SEB

 

IC12

 

Driver circuit for the PF motor

Reset IC

 

IC15

 

Generates the reset signal at power on

(BH6150F)

 

 

 

and power down, and resets the CPU

 

 

 

 

and the gate array

2-4

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Epson TM-FX2180 manual Component Functions, CPU IC2