Fig. 3-4; Main PCB Block Diagram- Page 46

CHAPTER 3  THEORY OF OPERATION

3-4

1.2

Main PCB Block Diagram

Fig. 3-4 shows the block diagram of the main PCB of the HL-1030/1240 printer.

Reset Circuit

Program + Font ROM

1.0 Mbytes

RAM

(2.0 Mbytes)

EEPROM (128    8 bits)

A  S  I  C

Oscillator (32.7MHz)

Address Decoder

DRAM Control

Timer

FIFO

CDCC Parallel I/O

Soft Support

EEPROM I/O

Engine Control  I/O

To Engine PCB

CPU Core

(MB86833)

BUS

INT

To PC

USB I/O (HL-1240 only)

To PC

Fig. 3-4

HL-1030/1240