Brother International HL 1230 Service Manual - Page 54
Main PCB Block Diagram - reset
View all Brother International HL 1230 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 54 highlights
CHAPTER 3 THEORY OF OPERATION 1.2 Main PCB Block Diagram HL-1230/1440 Fig. 3-4 shows the block diagram of the main PCB of the HL-1230/1440 printer. A S I C Reset Circuit CPU Core (MB86833) BUS INT Oscillator (33.33MHz) Program + Font ROM 1.0 Mbytes Address Decoder DRAM Control RAM (2.0 Mbytes) Timer FIFO Option RAM (SIMM) (max.32Mbytes) (HL-1440 only) CDCC Parallel I/O USB I/O (HL-1440 only) To PC To PC EEPROM (128 8 bits) Soft Support EEPROM I/O Engine Control I/O To Engine PCB Fig. 3-4 3-4
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-1230/1440 printer.
Fig. 3-4
HL-1230/1440
Reset Circuit
Program + Font ROM
1.0 Mbytes
RAM
(2.0 Mbytes)
EEPROM (128
8 bits)
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
CPU Core
(MB86833)
BUS
INT
To PC
USB I/O (HL-1440 only)
To PC
Option RAM (SIMM)
(max.32Mbytes)
(HL-1440 only)