Brother HL-2400C - Main PCB (Video Controller PCB; Outline

IV-46
2.3 Main PCB (Video Controller PCB)
2.3.1 Outline
The Main PCB consists of the circuits which perform the following functions;
• Receive the printing data from the computer.
• Convert the received data to the bitmap data such as characters or graphics.
• Control the engine and send the generated bitmap data as a video signal.
The control panel is controlled by communicating with the engine CPU to display LCD
messages, light the LEDs and display the button status, etc.
The power for the Main PCB is supplied from the engine through the engine interface
connector.
<Main PCB Block Diagram>
MIO
BOARD
MIO RELAY
(CONNECTOR)
PCB
Flash ROM
8M x2(2MB) x2Banks
MASK ROM
32M mask x2(8MB)
EDO DRAM
16M x8(16MB)
EEPROM
X24C04
4kbit
SIMM(72pin) 3Slots
(EDO or Fast Page)
96MB max.
CDCC I/F
RS-232C I/F
PCMCIA x2
ENGINE I/F
Main PCB
MB86832
(SPARC lite)
Address
Data
MA,RAS,CAS
F245
SN75C1168
LS07
F245
LS245
LS245
LS245
ADM202
Video
HSync
Command, PrReq
VSync, Status,
IReady, KeyStatus
CPU
MB87F1610
ASIC
+5V
GND
Regurator+5V
+3.3V
Fig.4-37