Brother MFC-8540DN Service Manual

6-3
Confidential
 TT
2 KS_CLU T2_KS_CLU
1 24V
VM7
2 SD_CLU VM8
1 24V HU+
HU+
16 16
HU+
24V 8724V MTRDRV_RSTN RESETn HU-
HU-
15 15
HU-
SEN_JAM 33SEN_JAM KS_CLU 76KS_CLU MTR_SLEEP SL EEPn HV+
HV+
14 14
HV+
Hall IC
S0V 22S0V SD_CLU 65SEN_JAM HV-
HV-
13 13
HV-
VCC_LED 11VCC_LED SEN_JAM 54SEN_PE T2_SEN_JAM MTR_SCS SCS HW+
HW+
12 12
HW+
SEN_PE 43SEN_EDGE T 2_SEN_PE MTR_SCLK
SCLK
HW-
HW-
11 11
HW-
SEN_PE 33SEN_PE SEN_EDGE 32S0V T2_SEN_EDGE MTR_SDATAI SDATAI
SGND
10 10
SGND
Hal l IC
S0V 22S0V S0V 21VCC_LED SDATAO
+5.0V
99
+5.0V
VCC_LED 11VCC_LED VCC_LED 1 U
U
88
U
MTR_ENB
ENBL
U
77
U
SEN_EDGE 33SEN_EDGE V
V
66
V
S0V 22S0V MTR_CLK CLKIN /PWN IN
V
55
V
VCC_LED 11VCC_LED W
W
44
W
MTR_FGS FGOUT /LOCKn
W
33
W
Hal l IC
MTR_FGHALL FGHALL FG+
FG+
22
FG+
MTR_FAULTN
FAULTN
FG-
FG-
11
FG-
FGFB
T3_KS_CLU
2 KS_CLU
1 24V
2 SD_CLU T3_SD_CLU
1 24V 9 24V
24V 88KS_CLU
SEN_JAM 33SEN_JAM KS_CLU 77SD_CLU
S0V 22S0V SD_CLU 66NC
VCC_LED 11VCC_LED 55SEN_JAM T3_SEN_JAM
SEN_PE 44SEN_PE T3_SEN_PE DCDC_ENABLE
SEN_PE 33SEN_PE SEN_EDGE 33SEN_EDGE T3_SEN_EDGE DCDC
S0V 22S0V S0V 22S0V
VCC_LED 11VCC_LED VCC_LED 11VCC_LED
SEN_EDGE 33SEN_EDGE
S0V 22S0V
VCC_LED 11VCC_LED
VCC_FAN 3
GND 2
FAN_LOCK 1
FAN_FULL
2 KS_CLU T4_KS_CLU
1 24V
2 SD_CLU
1 24V T4_SD_CLU
24V 8824V
SEN_JAM 33SEN_JAM KS_CLU 77KS_CLU FAN_LOW
S0V 22S0V SD_CLU 66SD_CLU
VCC_LED 11VCC_LED SEN_JAM 55SEN_JAM T4_SEN _JAM
SEN_PE 44SEN_PE
T4_SEN_PE
SEN_PE 33SEN_PE SEN_EDGE 33SEN_EDGE T4_SEN_EDGE
S0V 22S0V S0V 22S0V FAN_LOCK
VCC_LED 11VCC_LED VCC_LED 11VCC_LED
SEN_EDGE 33SEN_EDGE
S0V 22S0V
VCC_LED 11VCC_LED
2 KS_CLU T5_KS_CLU
1 24V
2 SD_CLU
1 24V T5_SD_CLU
24V 8824V
SEN_JAM 33SEN_JAM KS_CLU 77KS_CLU
LED_VCC_CTL
S0V 22S0V SD_CLU 66SD_CLU
VCC_LED 11VCC_LED SEN_JAM 55SEN_JAM T5_SEN _JAM
SEN_PE 44SEN_PE T5_SEN_PE
SEN_PE 33SEN_PE SEN_EDGE 33SEN_EDGE T5_SEN_EDGE
S0V 22S0V S0V 22S0V
NC
112
NC
VCC_LED 11VCC_LED VCC_LED 11VCC_LED
NC
211
NC
S0V 1
310
7 VDD3
SEN_EDGE 33SEN_EDGE TT_Timing TT_Timing 2
48
6 LT_Timing
S0V 22S0V TT_RxD TT_RxD 3
57
5 LT_RxD
VCC_LED 11VCC_LED RST TT_RST 4
65
4 LT_RST
TT_TxD TT_TxD 5
76
3 LT_TxD
TT_TxEN VDD3 6
85
2 S0V
NC
94
1VDD24
NC
10-12 1-3
NC
EEPROM
24V
9
9 SCL SCL
P0V 8
8 SDA SDA
24V
7
7
P0V
6
6
DSLEEP
5
5 DSLEEP DSLEEPN
HEAT_ON
4
4
RL_DRIVE
3
3
INLET _OUTLET OFF_MODE 2
2 LVPS_OFF_PLS S0V 2
L1
AC_DIRECT_VDD
1
1 KT_SW1 KT_SW1 1
FG
N
L1 L1
S0V 2
FG
KT_SW0 KT_SW0 1
NN
VDD24_DETN
MT/TT
OFF_MODE
AC_DIRECT
24V
P0V
24V
P0V
HEA T_ON
RL_DRIVE
VDD24
M
+
5.0V
+5.0V
+5.0V
Paper feed motor
AC direct
inpit circuit
Low-voltage
AC/DC
Power IC
24V control circuit
200V model
T5TT relay PCB
MAIN PCB
V DD24
VDD3_LED1
MCU
Motor driver
VDD24_
VDD5
VDD2
VDD2
T4TT relay PCB
VDD3_LED1
VDD3_LED2
VDD3_LED2
VDD24
VDD3
VDD3
VDD3_LED1
VDD3
VDD3_LED2
VDD2 4 _M
VDD3
VDD3
VDD3
VDD24
VDD5
VDD3
TXD Buffer
TT:PullDow
TT Connector
Main bodyMain body
Power supply PCB
24V
P0V
8
24V
7
P0V
6
5
HEAT_ON
4
RL_DRIVE
3
OFF_MODE 2
AC_DIRECT_VDD
1
100V model
T3TT relay PCB
T2TT relay PCB
VDD24
VDD24
T2 paper empty sensor
T2 jam sensor
T2 paper feed sensor
T3 paper empty sensor
T3 jam sensor
T3T2 paper empty sensor
T4 paper empty sensor
T4 jam sensor
T4 paper feed sensor
T5 paper empty sensor
T5 jam sensor
T5 paper feed sensor
T5TT release clutch
T5TT pickup clutch
T4TT release clutch
T4TT pickup clutch
T3TT release clutch
T3TT pickup clutch
T2TT pickup clutch
MAIN fan
TT Balance sensor L
TT Balance sensor R

Brother MFC-8540DN Specifications

General

Brand	Brother
Model	MFC-8540DN
Category	All in One Printer
Language	English