Main Pcb Block Diagram - Brother HL-730Plus Service Manual

1.2

Main PCB Block Diagram

Fig. 2.2 shows a block diagram of the main PCB.
Reset Circuit
Program + Font ROM
4 Mbytes
RAM
(1.0 Mbytes)
Option RAM (SIMM)
(max.32 Mbytes)
Option Serial I/O
(RS232C & RS422A)
EEPROM (512 x8 bits)
Motor Driver
CPU Core
(R3041)
BUS
INT
To Panel Sensor PCB
Fig. 2.2
II-2
A S I C
Oscillator (4MHz)
Address Decoder
DRAM Control
Timer
FIFO
DATA EXTENSION
CDCC Parallel I/O
Soft Support
EEPROM I/O
Engine Control I/O
To PC