Brother MFC640CW Service Manual page 372

Head PCB
Carriage PCB
CN8
Media 1
SM/xD
/MS/SD
CN7
Media 2
CF
CN24
USB
CN25
LAN
CIS motor
CIS unit
Main PCB
Paper
Carriage
Backup
feed
motor PF sensor
battery
motor
PCB
Ink cartridge PCB Maintenance ADF unit
unit
Power
Color LCD
supply
PCB
WLAN PCB
CN5
LINE
CN20-2 -1
La La
-1 CN1-2
Lb Lb
MJ PCB
CN4
CN18-2 CN3-2
+30V +30V
-1 -1
EXT
RDPS EXT
CN19-2
VOUT2
Speaker
-1
VOUT1
CN12-5 CN11-15
SDIN
S0V
-4
-14
S0V
+5V
-3
-13
CLK LED0
-2
-12
+5V KIN1
-1
-11
KIN3
SDOUT
-10
KIN4
-9
KIN5
-8
PIN0
-7
KOUT5
-6
KOUT4
-5
KOUT3
-4
KOUT2
-3
KOUT1
-2
KIN2
-1
KOUT0
CN2-10
PIN0
-9
KOUT5
-8
KOUT0
-7
KOUT1
-6
KOUT2
-5
KOUT3
-4
KOUT4
-3
KIN5
-2
KIN4
-1
S0V
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