Brother HL-4040CN Service Manual page 315

Engine PCB Circuit Diagram (5/5)
1
2
Photo-sensor LED VCC
+3.3V
R37
22k
Q9
R38 2SB1197K (RANK:R)
A 560
Q11
TP308 TP296
4.7k C
400mA 0.4
sen_led_on1
B 2E/4D/4B/4A/4C/5B/5C/5A
1-1B/4-1B/4-1E TP292 C13 TP500
E
47k C101
DTC143ZE
(1608)
SGND SGND
Waste Toner box Sensor
+3.3V
B
R346
22k
R345
TP294 Q38
820
B E
2SB1197K (RANK:R)
Q39
C
4.7k C TP300
wst_tn_led
B
2-1F
TP293 TP301
E
10k
DTC143ZE
(1608)
SGND
WST TN
+3.3V
CN27
R337 100
1 R302
WST_TN_LED
18k R319
C237 (1/10W,1608)
0
C103 (1.5V) +3.3V
2
0V SGND
TP137
R293
+3.3V C215
15k
C102 R291
4.7k
R301
R292
22k 10
100 U18
3 SGND 2-1F
WST_TN_SEN 13
11 TP233
C
C214 TP298 BA10339FV
C101
SGND
+3.3V
R338 100
4
WST_TN_LED
C238 (1/10W,1608) R315
C103 18k R316
0
5 (1.5V)
0V SGND +3.3V
+3.3V R307 TP136
15k C218
C102
R300
4.7k
R303
R294
22k
100 8
SGND U18
6 14 2-1F
WST_TN_SEN2
9 TP261
BA10339FV
C216 TP299
B6B-PH-K-Y(LF)(SN)
C101
(YELLOW)
SGND
D
Fuser Thermister/Heater off control
Eject sensor
+3.3V
R218
CN32
22k
1
EJECT_SEN
1-1F
R217 C141
TP307
100
C102
2
0V SGND
SGND
R212
3
LED_ON
R214 2A/4D/4B/4A/4C/5B/5C/5A
120
(1608) 100
1-4E
TP369
Thermister(Center)
4 ANALOG
FUSER_THM1
1-4E
+3.3V
R204
18k C135
E
1%(F) C102
R209
680
1%(F)
SGND (3.125V)
C132
R213
18k
L3
1%(F) C102
5
+3.3V +3.3V
BLM15AG601SN1D
C126
SGND
C104
R206
SGND C131
10k
C102
SGND
ANALOG Thermister(Edge)
FUSER_THM2 6
1-4E
R192
18k C120
B6B-PH-K-E(LF)(SN) +3.3V
1%(F) C102
(BLUE)
R178
SGND 680
1%(F)
F +5V
TP306
U11 8 R179
C111
18k
V+
1%(F) C102
V-
LM393PT 4
SGND
SGND
R180
10k C112
TP302
C102
SGND
1 2
3 4
Development-Release sensor
Thermister for Temperature in the machine
T1 Paper empty/Paper edge sensor
+3.3V
DEVREL SEN
T1PE/PEDG CN34
CN10
R28
39k
DEVREL_SEN
R29
1
T1_PE_SEN t1_pe_sen
2-1E
100
TP314
C11 (Paper empty
C102 sensor)
2
0V SGND
SGND LED VCC
led_vcc L1
3
LED VCC led_vcc
BLM15AG601SN1D 2E/2A/4D/4B/4C/5B/5C/5A
+3.3V
R27
39k
R26
T1_PEDG_SEN 4
t1_pedg_sen
2-1E TH3_SEN
100
TP315
C10
C102 B5B-PH-K-R(LF)(SN)
B4B-PH-K-R(LF)(SN) (RED)
SGND
MP tray PE-sensor/MP regist-front sensor
Clenner Release
sensor
+3.3V
CLN REL SEN
MP-REGF/PE
CN11
CN7
R20
39k R21
CLN_REL_SEN
1
MP_PE_SEN mp_pe_sen
2-1E
100 TP317
(MP Paper empty
C7
sensor)
C102
L2 SGND
2
LED_VCC led_vcc
BLM15AG601SN1D 2E/2A/4D/4A/4C/5B/5C/5A LED VCC
+3.3V
292161-3
R19
39k
R18
3
MP_REG_F_SEN
mp_reg_f_sen
2-1E
100 OPC gear origin
TP318
C6
4 sensor
0V C102
SGND
OPC1 SEN
SGND CN36
B04B-CZHK-B-1(LF)(SN)(V)
OPC1_SEN
Regist-front Sensor
+3.3V
C508
REG-F
C103
CN8
1 LED VCC
0V
SGND SGND
wst_tn_sen1 R30
2
LED VCC led_vcc
B3B-PH-K-R(LF)(SN)
120 2E/2A/4D/4B/4A/5B/5C/5A
+3.3V
(1608)
OPC2 SEN
CN33
R23
39k
R22 OPC2_SEN
3
T1_REG_F_SEN t1_reg_f_sen
2-1E
100 TP313
C8
B3B-PH-K-M(LF)(SN) (GREEN)
C102
SGND
Regist-rear Sensor LED VCC
+3.3V
B3B-PH-K-K(LF)(SN)
REG-R
wst_tn_sen2
CN9
R25
39k
R24
1 Rear Cover Sensor(Switch)
REG_R_SEN
reg_r_sen
1-1F
100 TP316
C9
C102
2
0V SGND
SGND
CN26
R31
3
LED VCC led_vcc REAR_COV_SEN
120 2E/2A/4B/4A/4C/5B/5C/5A
(1608)
B3B-PH-K-P(LF)(SN) (PURPLE)
292161-2
LT Relay
LT
eject_sen
CN19
C110
50VDC F7
C103
TF16AT2.00TTD
1 (1608)
VCC24LPS +24V
(1608)
2
24RET PGND
led_vcc
+3.3V
fuser_det
R175
R174
heat_thm1 100k
100
3
LT1_LIFT_DRV
lt1_lift_drv
2-2F
C107 TP325
C102
R173
SGND 100
4
LT1_SOL lt1_sol
2-2F
C104
TP309 +3.3V TP324
LT-SOL ON/OFF
+3.3V
C102 0V
+3.3V:ON
SGND
R169
U11
R207 2.2k R170
100
4.7k
5
LT1_CAS_SEN
5 7 heat_lmt 1-1E
2-1E
+3.3V C103 TP326
TP312
6
C102
TP310 LM393PT
R165 SGND
68k R167
100
6
LT1_LIFT_SEN
1-1E
heat_thm2 +3.3V C100
TP327
C102
SGND
R162
68k R163
100
LT1_PE_SEN 7
1-1E
+3.3V C99 TP328
C102
R161 SGND
68k
R160
100
8
LT1_REG_SEN
1-1E
U11 C98
TP329
B08B-CZHK-B-1(LF)(V)
C102
3
1
SGND
2
LM393PT
3 4
6-11
5
6
+3.3V
R171
39k
R172
1
devrel_sen
2-1D
100 TP319
C105 REG-MARK sensor/Density sensor/
2
0V C102
SGND Thermister for ambient temperature with belt)
R168 SGND
3
led_vcc
2E/2A/4D/4B/4A/4C/5B/5C
120
(1608) +3.3V
+3.3V
R158 C518
150k C103
TP295
1%(F)
4
3.3V Q21
4.7k C
SGND
sen_led_on3
B
5 ANALOG 1-1C
th3_sen
1-4F TP270
R159
10k
C97
(RED) 3.3k
C102 DTC143ZE
CN29
1%(F) (1608)
SGND
SGND R289 220
1
LED_VCC
+3.3V 2
0V SGND R288 220
pl0
R16 8B
39k
R15
1 R283
cln_rel_sen
2-1B 100
3
100 TP320 REG_MARK_SEN1
C5 6
(Clener sensor)
U18
C102 C208 TP359
C101 7 BA10339FV
2
0V SGND
SGND R274
100k
R17
3
led_vcc SGND
120 2E/2A/4D/4B/4A/4C/5C/5A R306 220
4
(1608) LED_VCC2
R314 220
pl1
8B
R284
+3.3V 100
5
REG_MARK_SEN2
4
C211 TP358 U18
5
C101 BA10339FV
R144
R280
39k
R143 100k
1-3C/2-1C SGND
1
opc1_sen
6
3.3V +3.3V R279
100 TP321
(OPC sensor1) 10k
C85 +3.3V
C102
2 TP343 R277
0V SGND
SGND 10k
R322
150k
R140
3 1%(F) TP344
led_vcc
2E/2A/4D/4B/4A/4C/5B/5C/5A
120 7 ANALOG
TH2_SEN
(1608)
(RED) R321
+3.3V
C220
3.3k
C102
1%(F)
R183 SGND
39k SGND
R186
1 1-3C/2-1C
opc2_sen
R324
100 22
TP322 (OPC sensor2) 5%(J) D2114K-W
C116 8
LED_CUR Q35
C102 C
(1/8W/2012)
TP216
2 B
0V SGND
SGND TP332
E
C226
TP289
R176 R323
3
led_vcc 36 5%(J)
120 2E/2A/4D/4B/4A/4C/5B/5C/5A
(1/4W/3216) SGND
(1608)
(BLACK)
SGND
R325
9
VO1
470
R327
+3.3V 10
VO2
470
R347
C223 C224
2.2k R348
C101 C101
1
rear_cov_sen
1-3F
100 TP323
C239 SGND
2
0V SGND C102
11
0V SGND
SGND
C225
C104
12
5V +5V
B12B-CZHK-B-1(LF)(SN)(V)
Temperature and Humidity sensor of outside air
TH/HU SEN +3.3V
CN35
1
+5V D9
+5V
RB751V-40
2
HU1_SEN hu1_sen
1-4E
C88
C102
SGND
3
0V SGND
:OFF
+3.3V +3.3V
D8
R152
RB751V-40
lt1_cas_sen 10k 1%(F)
TH1_SEN 4
th1_sen
1-4E
C87
292161-4
C102
lt1_lift_sen
SGND
lt1_pe_sen
lt1_reg_sen
5 6
7 8
A
+3.3V
R276
22k +3.3V
R278
Q22
820
B E
2SB1197K (RANK:R) R320
C
4.7k U17
TP297
23 7
dp_scl SCL Vcc +3.3V
1-3F
TP303
E
C209
+3.3V
C103
SGND 12 18
WP GND SGND
+3.3V
2
A0
11 9
A1 RH0
+3.3V
14 10
TP345
A2 RW0
24 8
A3 RL0 pl0
SGND
6B
R282
10k
1 16
reg_mark_sen1
1
2-1F NC1 RH1
B
3 17
TP337 TP360
NC3 RW1
4 15
NC4 RL1 pl1
6B
5
NC5
+3.3V
6
NC6 R305
19 13
+3.3V 4.7k
NC19 SDA
20 dp_sda
1-3F
NC20
21
R281
NC21
10k
22
reg_mark_sen2 NC22
2 SGND
2-1F
TP338
DP7269YI50
R275
560
+5V
reg_mark_pwm U18 3
2-1F
TP331 TP335 V+
C207
C105
10% V-
(1608) BA10339FV 12
SGND
SGND
th2_sen
1-4E
C
R329 R330
150 150
dens_led_pwm
2-2E
TP333 TP341
C227
C104 C104
10%(B) 10%(B)
SGND
ANALOG
dens_sen2
1%(F) 1-4E
TP340
ANALOG
dens_sen1
1-4E
1%(F)
TP339
D
SGND
E
Waste Toner sensor
Development Release sensor
Cleaner Release sensor
Tray sensor
Regist sensor
Eject sensor
OPC origin sensor
Rear cover switch
REG-MARK sensor
Density sensor
Thermistor
Humidity sensor
F
CODE LM9474-001
CIR B512250 (5/5)
NAME
7 8
Confidential