Brother International HL 1230 Service Manual - Page 56
Fig. 3-6 shows the block diagram of the main PCB of the HL-1470N printer.
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CHAPTER 3 THEORY OF OPERATION HL-1470N Fig. 3-6 shows the block diagram of the main PCB of the HL-1470N printer. Reset Circuit CPU Core (MB86832) BUS INT A S I C Oscillator (33.33MHz) Program + Font ROM 8.0 Mbytes Flash ROM (2.0 Mbytes) RAM (4.0 Mbytes) Address Decoder DRAM Control Timer FIFO CDCC Parallel I/O Option RAM (SIMM) (max. 32Mbytes) USB I/O Soft Support To PC To PC EEPROM (8192 x 8 bits) EEPROM I/O To PC or Hub Network Board To Engine PCB Engine Control I/O PCI Bus Control Fig. 3-6 3-6
CHAPTER 3
THEORY OF OPERATION
3-6
Fig. 3-6 shows the block diagram of the main PCB of the HL-1470N printer.
Fig. 3-6
HL-1470N
Reset Circuit
Program + Font ROM
8.0 Mbytes
RAM
(4.0 Mbytes)
Option RAM (SIMM)
(max. 32Mbytes)
EEPROM (8192 x 8 bits)
CPU Core
(MB86832)
A
S
I
C
Oscillator (33.33MHz)
Address Decoder
DRAM Control
Timer
FIFO
CDCC Parallel I/O
Soft Support
EEPROM I/O
Engine Control
I/O
To Engine PCB
BUS
INT
To PC
USB I/O
To PC
Flash ROM
(2.0 Mbytes)
PCI Bus Control
Network Board
To PC
or Hub