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