Brother MFC640CW - 3.3 Control Electronics

3-40 Confidential
3.3 CONTROL ELECTRONICS
3.3.1 Components
The following illustrations show the hardware components for MFC820CW, MFC640CW and
DCP340CW. The corresponding wiring diagrams appear in Appendix 5.
MFC820CW
Main PCB
4-pin
ROM MODEM
SDRAM
MJ PCB
2-pin (MJ-line)
2-pin (MJ 1)
2-pin
Speaker
Center panel PCB
5-pin
Scanner open sensor
Carriage PCB
CR encoder sensor
Head thermistor
17-pin (Head 1)
19-pin (Head 2)
Head/
carriage
unit
Paper width sensor
2-pin
Carriage motor
Paper feed motor
12-pin
CIS unit
4-pin
CIS motor
SCANNING
INK JET PRINTING & PAPER FEEDING
18-pin
Color LCD
Media 1
(SM/XD/SD/MS
card)
Media 2
(CF card)
Line
External telephone
LAN
PC
Ink refill ASSY
9-pin
EEPROM
DC motor driver
Stepping motor driver
Ink cartridge PCB
Ink cartridge
sensors
Purge cam switch
Maintenance unit
10-pin
ADF motor
ADF unit
Document rear sensor
Stepping motor driver
7-pin
5-pin
PF sensor PCB
PF encoder sensor
Registration sensor
7-pin
2-pin
2-pin
4-pin
Backup battery
16MB
LAN I/F
USB
Power supply
PCB
AC line
SDAA
Main
ASIC
MEDIA
GA
8MB
Document front sensor
WLAN PCB
Control panel PCB
15-pin
WLAN
6-pin