Brother FAX-2840 Service Manual page 265

1. WIRING DIAGRAM
Wiring diagram
REG_F
ADF COVER SENSOR
LCD
HVPS
CN1
CN2
1 FUSER_FAN_VCC
PGND
FUSER_FAN_SEN
3 FUSER_FAN_SEN
FAN
SW
COVER OPEN SW
DX
SW
sensor
Fuser Thermistor
(Center)
Unit
Thermostat
TAB TAB
Thermistor
(Edge)
TAB
Halogen
heater
TAB
TAB TAB
UL1061
AWG#28
Relay
Triac
+3.3V
F2,3
F1
(LIVE)
(NEUTRAL)
PANEL PCB
CN4
CN
+5V 1 1
RESPONSE
COMMAND
PNL_CLK
GND
+3.3V
REG_R
SEN_REAR
SEN_FRONT 8 8
CN24
1
2
THERMISTOR CN25
1
2
CN17
TNRLED_ON 1
1
+24V
+24V
FUSER_FAN
DISCHG-PRE
HV_ENABLE
GRIDC
FB_GRID
FB_DEV
FB_TRCCV
FB_TRCC
+3.3V
PWM_CHG
PWM_DEV
PWM_TRCC
PWM_TRCV
PGND
GND
+3VI 20 20
Eject-sensor
CN4
CN3 CN13
LED_VCC 1
2 DX_SEN 1
1 GND GND
EJECT_SEN
DX_SEN
THM_FUSER_C
EJECT
+3.3V
THM_FUSER_E
+3.3V 8 8
CN2
2 THM_C
1 +3.3V
CN1
2 THM_E
1 +3.3V
CN1
REG_F REG_R
4 GND
REG_R_SEN
LED VCC
Regist
1 REG_F_SEN
F/R sensor
B512315
CN102 CN14
UL1061
AWG#28
1
AC_ZEROX 1
HEAT_ON
HEAT_ON
RELAY1
RELAY2
REG_R_SEN
LED VCC
REG_F_SEN 7
VDD_CTRL_LV0 8 8
UL1061
CN15
CN101
AWG#22
1
S0V 1
+3.3V
P0V
+24V
+24V
+24V
+8V P0V
+8V 7 7
HEAT_ON
LVPS
CN6
/B 4
B
/A
A 1
+5V
PNL_CLK CN5
COMMAND
FG 12
RESPONSE
R-GND
GND
G-GND
+3.3V
B-GND
SEN_REAR
VLED
+5V(VDD_RHS)
CLK
TG
VREF
R3V
GND
MODE
AO 1
ADF COVER
GND
CN3
2
VOUT1
1
VOUT2
+3.3V
STHM
CN20
GIJI 1
TELOFF
MDM_MONI
CSn
RIn
RESETn
IRQ
GND
SPICLK
GND
SPIDO
+ 3 . 3 V
SPIDI
GND
+24V 15
TNRLED_ON
+24V
CN22
+24V
2
GND
FUSER_FAN 1
HOOK
FUSER_FAN_SEN
DISCHG-PRE
HV_ENABLE
CN11
GRIDC
+24V 2
FB_GRID
REG_CLU 1
FB_DEV
FB_TRCCV
FB_TRCC
CN10
+3.3V
2
+24V
PWM_CHG
T1_CLU
1
PWM_DEV
PWM_TRCC
PWM_TRCV
CN9
PGND
GND HU+ 1
HU-
HV+
+3VI
HV-
HW+
HW-
GND
+3.3V
U
U
U
LED_VCC
V
V
GND
V
EJECT_SEN
W
W
DX_SEN
W
THM_FUSER_C
FG+
19
+3.3V FG-
THM_FUSER_E
CN12
+3.3V
18
CENTER TAP
COIL U
COIL U
COIL V
COIL V
COIL W
COIL W
FG 11
BDN 10
+3.3V
LD_OFF
ENABLE
LD_REF
GND
VdoData_P
VdoData_N
GND
AC_ZEROX
+3VI 1
HEAT_ON
RELAY1
CN16
RELAY2 GND 1
TNR_SEN
REG_F_SEN
LED_VCC
LED VCC
PNEW_SEN
(26ppm model only) PEDGE_SEN 5
REG_R_SEN
VDD_CTRL_LV0
CN19
Ethernet
(NETWORK MODEL
S0V
ONLY)
+3.3V
+3.3V
CN18
P0V
+24V +24V USB
Function
+24V
+8V
P0V
+8V
MAIN PCB
6-1
ADF MOTOR
CIS
SPEAKER
MODEM PCB
1 GIJI
TELOFF
MDM_MONITOR
RESETn
CSn
RIn
IRQ
GND
SCK
GND
SDO
+ 3 . 3 V
SDI
GND
15 +24V
HOOK PCB
2 GND
(H/S MODEL ONLY)
1 HOOK
Regist
CLUTCH
Paper Feed
CLUTCH
HU+
1 Main
HU-
Motor Unit
HV+
HV-
HW+
HW-
GND
VCC3
U
U
U
V
V
V
W
W
W
FG+
19
FG-
1
CENTER TAP
Polygon
COIL U
Motor Unit
COIL U
COIL V
COIL V
COIL W
COIL W
8 FG
9 BDN
+3.3V
LD_OFF
ENABLE
LD_REF
GND
LVDS
VdoData_P
LVDS
VdoData_N
GND
18 +3VI
LD CTRL PCB
PE NEW SENSOR PCB
1 GND CN2
LED VCC 1
TNR_SEN
GND
LED_VCC
PEDE_SEN 3
PNEW_SEN
PEDGE_SEN
5
Confidential
LINE
EXTERNAL
TELPHONE
H/S