Brother International HL-1070 Service Manual - Page 18
Main PCB Block Diagram, Fig. 2.2, Fig. 2.2 shows the block diagram of the main PCB. - drivers
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1.2 Main PCB Block Diagram Fig. 2.2 shows the block diagram of the main PCB. A S I C Reset Circuit CPU Core MB86831PFV BUS INT Oscillator (33.333333MHz) Program + Font ROM (8Mbytes) Flash Memory (1Mbytes) RAM (4Mbytes) Address Decoder DRAM Control Timer FIFO DATA EXTENSION Option RAM (SIMM) (Max. 32Mbytes) Option Serial I/O (RS232C & RS422A) Parallel I/O USB I/O Software Support To PC To PC EEPROM (512 x 8bits) EEPROM I/O Motor Driver Engine Control I/O To Panel Sensor PCB Fig. 2.2 II-2
II-2
1.2
Main PCB Block Diagram
Fig. 2.2 shows the block diagram of the main PCB.
Reset Circuit
Program + Font ROM
(8Mbytes)
RAM
(4Mbytes)
Option RAM (SIMM)
(Max.
32Mbytes)
Flash Memory
(1Mbytes)
Option Serial I/O
(RS232C & RS422A)
EEPROM (512 x 8bits)
CPU Core
MB86831PFV
A
S
I
C
Oscillator (33.333333MHz)
Address Decoder
DRAM Control
Timer
FIFO
DATA EXTENSION
Software Support
EEPROM I/O
Engine Control
I/O
Motor Driver
To Panel Sensor PCB
BUS
INT
Parallel I/O
To PC
USB I/O
To PC
Fig. 2.2