Brother HL-1230 - Page 56

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
Download Free Service Manual and Resetter Printer at http://printer1.blogspot.com