Brother MFC640CW - Page 372

Main PCB
Media 1
SM/xD
/MS/SD
Media 2
CF
CN8
CN7
MJ PCB
CN20-2
La
Lb
-1
CN18-2
-1
RDPS
+30V
+30V
EXT
CN19-2
-1
VOUT2
VOUT1
Speaker
CN5
LINE
CN4
EXT
La
Lb
CN1-2
-1
FG
R-GND
G-GND
B-GND
CLK
VLED
TG VREF
VCC GND
GND/MODE AD
CN23-12
-11
-10
-9
-8 -7 -6 -5 -4
-3 -2 -1
OUT_B
-3
-2
-1
CN14-4
OUT_B OUT_A OUT_A
USB
CN24
CIS unit
ENC2
VSS2
VDD2
CNT5V
MCNT5V
ENC1
MEDIACNTL
MEDIA
THM
CN21-17
-11
-10
-9
-8 -7 -6 -5 -4 -3 -2 -1
-16
-15
-14
-13 -12
VSS2 VSS2 VSS2
VDD2
VDD2 VDD2
VSS1
VDD1
SIN57
-11
-10
-9
-8 -7 -6 -5
-4
-3
-2
-1
-16
-15
-14
-13 -12
VTEMP_CHECK
VSS1
CLK
CN22-19
-18
-17
FIRE1_6 FIRE0_6 FIRE1_5 FIRE0_5 FIRE0_4 FIRE1_4
SIN46 SIN13 SIN02
FIRE0_3 FIRE0_2 FIRE0_1 FIRE1_3 FIRE1_2 FIRE1_1
Carriage PCB
-10
-9
-8
-7
-6 -5 -4
-3
-2
-1
PIRE1_6 PIRE0_6 PIRE1_5 PIRE0_5 PIRE0_4 PIRE1_4
-11
-16
-15
-14
-13
-12
CN2-19
-18
-17
SIN57 SIN46 SIN13 SIN02
VTEMP_CHECK
VSS1
CLK
PIRE0_3 PIRE0_2 PIRE0_1 PIRE1_3 PIRE1_2 PIRE1_1
CN3-14
-11
-10
-9
-8
-7
-6
-5 -4
-3
-2
-1
-16
-15
-13
-12
-17
ENC2
VSS2
VDD2
VSS2 VSS2 VSS2
VDD2
VDD2 VDD2
VSS1
VDD1
CNT5V
ENC1
MCNT5V
MEDIACNTL
MEDIA
THM
-11
-10
-9
-8 -7 -6 -5 -4 -3 -2 -1
-16
-15
-14
-13 -12
CN1-28
-22
-21
-20
-19 -18 -17
-27
-26
-25
-24 -23
FG
FG
COM
VDD2
VDD2
VSS2
FIRE1_6
FIRE0_6 FIRE1_5 FIRE1_4
FIRE0_5
FIRE0_4
SIN57 SIN46 SIN13 SIN02
VTEMP_CHECK
FIRE1_3
FIRE1_2
FIRE1_1
FIRE0_3
FIRE0_2
FIRE0_1
CLK
VDD1
VSS1
VSS2
COM
Head PCB
-8 -7
-6 -5 -4 -3
-2
-1
CN4-9
S0V
EMP
LEDPWR
MCNT
CCNT
VCNT
BCNT
-7 -6 -5 -4 -3 -2
S0V
EMP
LEDPWR
MCNT
CCNT
YCNT
BCNT
CN1-1
Ink cartridge PCB
Maintenance
unit
SEN_PURGE
S0V
CR_OUTB
-1
CR_OUTA
CN16-2
Carriage
motor
RESI
SLP5V S0V
ENC1 ENC2
LF_OUTB
-6 -5 -4 -3
-2
-1
LF_OUTA
PF sensor
PCB
CN15-7
-1
ENC1
ENC2
GND
SLP5V
RESI
-3
-4
-5
CN1-2
Paper
feed
motor
-1
CIS motor
LAN
CN25
S0V BAT_N
BAT_P BAT CHK
CN1-4
-3
-2 -1
Backup
battery
CN13-10
-9
-8 -7 -6
-5
-4
-3 -2 -1
S0V S0V
FSEN
SLP5V
B
A_BAR
+5V
RSEN
B_BAR
A
ADF unit
Confidential
D6
D5
D4
D3
D1
D2
D0 RD
WR RS
RESET CS
CN6-18
-11
-10
-9
-8
-7 -6 -5 -4
-3 -2
-1
Color LCD
-12
-13
-14
-15
-16
-17
VSS
LCD_V
+3.3 V
VSS
LED_VSS
D7
-5 -4 -3 -2
-1
+5V
FG
SOV
DATA+
FG
DATA-
WLAN PCB
CN10-6
CN3-2
MFC820CW
+30V +30V
PGND PGND
CN9-4
-3
-2 -1
Power
supply
PCB
Center panel PCB
SDIN
S0V
CLK
+5V
SDOUT
-4
-3
-2
S0V
+5V
LED0
KIN1
KIN3
KIN4
KIN5
PIN0
KOUT5
KOUT4
KOUT3
KOUT2
KOUT1
KIN2
KOUT0
-4
-3
-2
-1
-8
-7
-6
-5
-12
-11
-10
-9
-14
-13
CN11-15
Control panel PCB L
S0V
KIN4
KIN5
PIN0
KOUT5
KOUT4
KOUT3
KOUT2
KOUT1
KOUT0
-4
-3
-2
-1
-8
-7
-6
-5
-9
CN2-10
Control panel PCB R
CN12-5
-1