Brother HL-4040CN, HL-4050CDN, HL-4070CDW Service Manual page 316

Engine PCB Circuit Diagram (2/5)
1 2
U10
141
20MHz
CRNS_clk CLK
1-3D R157 TP51
127
TP120
CRNS_rst_n RST_N CPU I/F
1-3D
1k C90
(For ESD)
C101
R155
SGND 112 144 100
cpu_cs_n CPU_CS_N INTR0_N
1-1F
110 138
TP8 TP52
cpu_wr_n CPU_WR_N INTR1_N
1-1E
A 111 R156
TP16 TP53
cpu_rd_n CPU_RD_N
1-1E 100
TP42
124 137
cpu_a0 CPU_A0 CPU_D0
1-1C
123 136
TP121 TP142
cpu_a1 CPU_A1 CPU_D1
1-1C
122 135
TP122 TP143
cpu_a2 CPU_A2 CPU_D2
1-1C
121 134
TP123 TP144
cpu_a3 CPU_A3 CPU_D3
1-1C
118 133
TP124 TP145
cpu_a4 CPU_A4 CPU_D4
1-1C
117 132
TP125 TP146
cpu_a5 CPU_A5 CPU_D5
1-1C
116 129
TP126 TP147
cpu_a6 CPU_A6 CPU_D6
1-1C
115 125
TP127 TP148
cpu_a7 CPU_A7 CPU_D7
1-1C
114
TP128 TP149
cpu_a8 CPU_A8
1-1D
113
TP129
cpu_a9 CPU_A9
1-1D
TP130
69 70
belt_lock BELT_LOCK_N BELT_CLK
4-4D 74
BELT
BELT_ON
MOTOR
R210 10k 208 71
BELT_POS_SEN BELT_DIR
+3.3V
B
68
TP135
BELT_GAIN
TP67
75 76
cln_lock CLN_LOCK_N CLN_CLK
4-4B
78
Fuser/Belt CLN
CLN_ON
MOTOR
102 77
cln_rel_sen CLN_REL_SEN CLN_DIR
5-5B
205 204
dev_lock DEV_LOCK_N DEV_CLK
4-4A
202
DEV_ON
MOTOR 203
Development
Drive Motor DEV_DIR
151 152
scan_lock SCAN_LOCK_N SCAN_CLK
4-4F
150
SCAN_ON
POLYGON
MOTOR
RA10
172 88
2
opc1_sen OPC1_SEN OPC1_PHA
RA10
1-3C/5-6C 89
1
OPC1_PHB
C
RA10
84
4
OPC DRUM OPC1_IN0
RA10
87
MOTOR1 TP132
3
OPC1_IN1
RA9
90
4
OPC1_IN2
RA9
91
TP134 3
OPC1_IN3
RA8
171 95
4
opc2_sen OPC2_SEN OPC2_PHA
1-3C/5-5C RA8
98
TP133 3
OPC2_PHB
RA9
93
2
OPC2_IN0
RA9
94
1
OPC DRUM OPC2_IN1
RA8
MOTOR2 99
2
OPC2_IN2
RA8
100
1
OPC2_IN3
92
OPC_VREF_PWM
RA7
163 159
1
devrel_sen DEVREL_SEN DEVREL_PHA
D 5-5A RA7
158
TP140 2
DEVREL_PHB
161 R166 100
DEVREL_IN0
160 R164 100
TP139
DEVREL_IN1
RA7
157
TP138 3
DEVREL_IN2
Development RA7
156
Drive Motor 4
DEVREL_IN3
153
DEVREL_VREF_PWM
170 Toner Sensor 48
tnr_sen1 TNR_SEN1 TNR_LED
8C
169
TP50
tnr_sen2 TNR_SEN2
8C
168 166
tnr_sen3 TNR_SEN3 TNR_CMP_PWM
8D
167
tnr_sen4 TNR_SEN4
8E
Waste Toner Sensor
R223 10k 7 8
SGND WST_TN_SEN WST_TN_LED
TP131 TP141
Heator CTL
E 174 83
heat_lmt HEAT_LMT_N HEAT_ON
5-3E
81
HEAT_RELAY_ON
Sensor Density TP54
Sensor
105
t1_pe_sen T1_PE_SEN
5-4A
106 207
t1_pedg_sen T1_PEDG_SEN DENS_LED_PWM
5-4A 109
t1_reg_f_sen T1_REG_F_SEN
5-4C
146 5
mp_reg_f_sen MP_REG_F_SEN DENS_SOL
5-4B
147
mp_pe_sen MP_PE_SEN
5-4B EL CTL
+3.3V 104
EL_ON
Reserved IO
R229 R221
47k 47k 4
REVIO0 Sol
R230 47 6 149
ctl_bd0_n REVIO1 REG_SOL
1-7C
R222 47 103
TP45
ctl_bd4_n T1_SOL
1-7C
9
TP46
wst_tn_sen1 REVIO2
5-2C
79 148
wst_tn_sen2 REVIO3 MP_SOL
5-2D
80
reg_mark_sen1 REVIO4
5-7B
82 67
F
reg_mark_sen2 REVIO5 LT1_SOL
5-7B 145 66
reg_mark_pwm REVIO6 LT1_LIFT_DRV
5-7C
162
wst_tn_led REVIO7
5-1B R182 10k
179 173
REVIO8 DX_SOL
R187 10k 185
TP47
SGND REVIO9
R197 100 199 1
TP48
debug_log_txd REVIOA CLN_REL_SOL
1-5E
206 101
TP49
tnr_led REVIOB CLN_HLT_SOL
3-1D
MB87L8670
1 2
3 4
R177
47 175
bd1_n
3-7A 178
TP150
bd4_n
3-7A
R181
TP151
47
C113 C106
CRNS_intr0_n
1-3C
C101 C101
CRNS_intr1_n
(For ESD)
1-3C
SGND
cpu_d0
1-1A
cpu_d1
1-1A
cpu_d2
1-1A
cpu_d3
1-1B
cpu_d4
1-1B
cpu_d5
1-1B
cpu_d6
1-1B
cpu_d7
1-1B
55
grid_dcdet_n
3-3C
C137
C102
belt_clk
4-4D
SGND
belt_on
4-4E
belt_dir
4-4D
cln_clk
4-4C
cln_on
4-4C
cln_dir
4-4C
dev_clk
4-4A
dev_on
4-4B
dev_dir
4-4A
scan_clk
4-4F
scan_on
4-4F
7
opc1_pha
100 4-1B
8
opc1_phb
100 4-1B
27
A3.3V
5 C144
opc1_in0
100 4-1B C103
28
6
opc1_in1
100 4-1B SGND
5
opc1_in2
100 4-1B
6 25
opc1_in3
100 4-1B A3.3V
5 26
opc2_pha
100 4-1D SGND
6 RA13
opc2_phb
100
100 4-1D
Analog 4 5 14
ad_pd1
3-7D
7 Analog 3 6 39
opc2_in0 ad_pd2 TP55
100 4-1C 3-7D
8 Analog 2 7
opc2_in1 ad_pd3 TP56
3-7D
100 4-1D
7 Analog 1 8
opc2_in2 ad_pd4
100 4-1D 3-7D
8 18
opc2_in3
100 4-1D
17
TP370
16
opc_vref_pwm TP379
4-1C
15
TP377
SGND
8
devrel_pha TP378
100 4-1E
7
devrel_phb RA12
100 4-1E 100
Analog 35
3 6
hv_grid_fb1
3-3E
38
devrel_in0 Analog 4 5 TP351
4-1E hv_grid_fb2
3-3F
34
devrel_in1 Analog 2 7 TP376
4-1E hv_grid_fb3
3-3E
6 30
devrel_in2 Analog 1 8 TP374
100 4-1E hv_grid_fb4
3-3D
5
devrel_in3 TP375
100 4-1E
33
37
devrel_vref_pwm TP352
4-1F
SGND 36
TP373
RA11
32
100 TP372
Analog 2 7
hv_dev_fb1
3-3E TP371
Analog
4 5
hv_dev_fb2 21
tnr_cmp_pwm 3-3F
6B
Analog 3 6
hv_dev_fb3 19
3-3E TP353
Analog 1 8
hv_dev_fb4 20
3-3D TP380
22
TP381
TP382
29
heat_on
1-6B SGND
23
RA14
100
Analog 2 7
hv_trcc_fb1
3-5D
31
Analog 4 5
hv_trcc_fb2
3-5E
dens_led_pwm Analog 3 6
hv_trcc_fb3
5-7C 3-5E
24
Analog 1 8
hv_trcc_fb4
3-5D
dens_sol
4-5D
el_on
4-5F
SGND
R241 100
reg_sol
hv_bcln1_fb Analog
4-5B
3-5C
R242 100
t1_sol Analog TP354
4-5A hv_bcln2_fb
3-5D
R239 100
TP362
Analog
hv_dcln_fb
3-3D
R240 100
mp_sol Analog TP363
4-5C hv_fuser_fb
3-5D
12
TP364
+3.3V
41
lt1_sol
5-4E
lt1_lift_drv
5-4E
186
SGND
+3.3V
187
dx_sol
4-5E
10
11
cln_rel_sol
4-5D
195
cln_hlt_sol
4-5B SGND
3 4
6-8
5 6
U10
197
LD_PWR_PWM1 ld_pwr_pwm1
3-7C
193
BD1_N LD_PWR_PWM2 ld_pwr_pwm2
3-7C
188
BD4_N LD_PWR_PWM3 ld_pwr_pwm3
3-7B
182
LD_PWR_PWM4 ld_pwr_pwm4
3-7B
198
LD_MOD_PWM1 Toner empty detect & New Toner cartridge detect
194
TP36
LD_MOD_PWM2
191
TP102
LD_MOD_PWM3
183
TP161
LD_MOD_PWM4
TP162
180
LD_ENA_PWM ld_ena
3-7A
LD CTL
196
LD_ON1 ld_on1
3-7C
192
LD_ON2 ld_on2
3-7C
184
sen_led_on2
LD_ON3 ld_on3 1-1B
3-7B
181 TP152
LD_ON4 ld_on4
3-7B
+3.3V
45
HV_GRID_PWM1 hv_grid_pwm1
3-3B
44
R66
HV_DCDET_N HV_GRID_PWM2 hv_grid_pwm2
3-3B R70
47 4.7k
10k
HV_GRID_PWM3 hv_grid_pwm3
3-3B f=32kHz
52 tnr_cmp_pwm
2E
HV_GRID_PWM4 hv_grid_pwm4
3-3C TP57 C46
C104
42
HV_DEV_PWM1 hv_dev_pwm1
3-3B SGND
46
HV_DEV_PWM2 hv_dev_pwm2
3-3B
49
HV_DEV_PWM3 hv_dev_pwm3 +3.3V
3-3C
53
HV_DEV_PWM4 hv_dev_pwm4
3-3C TNR_SEN1
CN41 R53
57 39k
HV_TRCC_PWM1 hv_trcc_pwm1
HVPS CTL
3-5C 1
59 PNEW_SEN1
HV_TRCC_PWM2 hv_trcc_pwm2
3-5B
63
HV_TRCC_PWM3 hv_trcc_pwm3
3-5B
65 2
0V SGND
HV_TRCC_PWM4 hv_trcc_pwm4
+3.3V
3-5A
62
HV_BCLN_PWM1 hv_bcln1_pwm
R52
3-5B
58
470k
HV_BCLN_PWM2 hv_bcln2_pwm
3-5B 3
TNR_SEN1
ANALOG
54
HV_DCLN_PWM hv_dcln_pwm
3-3C
64
HV_FUSER_PWM hv_fuser_pwm
3-5A
56 4
LED_VCC
HV_DCLN_PLUS hv_dcln_on
+3.3V
3-3D
B4B-PH-K-K(LF)(SN)
ANALOG POWER
3
TNR_SEN2
AVD
VDD_3 +3.3V R63
CN40
C148 39k
C103
1
2 PNEW_SEN2
AVS VSS_2 SGND
13
VSS_13
43 0V 2
SGND
VR1 VDD_43 +3.3V
C145 +3.3V
C103
40
VR2 VSS_40 SGND
51 R62
470k
VDD_51 +3.3V
C142 3
TNR_SEN2
N.C._14 C103
ANALOG
50
N.C._39 VSS_50 SGND
61
VDD_61
+3.3V
LED_VCC 4
C130
C103
60 +3.3V
B4B-PH-K-Y(LF)(SN)
AD_PD1 VSS_60 SGND
73
TNR_SEN3
AD_PD2 VDD_73 +3.3V
C117 CN39 R81
39k
AD_PD3 C103
72 1
PNEW_SEN3
AD_PD4 VSS_72 SGND
86
VDD_86 +3.3V
C108
2
0V
C103 SGND
+3.3V
85
HV_GRID_FB1 VSS_85 SGND
HV_GRID_FB2
97 R78
HV_GRID_FB3 VDD_97 +3.3V 470k
C101
3
TNR_SEN3
HV_GRID_FB4 C103 ANALOG
96
VSS_96 SGND
108
HV_DEV_FB1 VDD_108 +3.3V
C96 4
LED_VCC
HV_DEV_FB2 C103
107
HV_DEV_FB3 VSS_107 SGND B4B-PH-K-R(LF)(SN)
+3.3V
120
HV_DEV_FB4 VDD_120 +3.3V
C95
TNR_SEN4
C103 R115
CN38
119 39k
HV_TRCC_FB1 VSS_119 SGND
1
128 PNEW_SEN4
HV_TRCC_FB2 VDD_128 +3.3V
C89
HV_TRCC_FB3 C103
126
0V 2
SGND
HV_TRCC_FB4 VSS_126 SGND +3.3V
131
VDD_131
+3.3V
C93
HV_BCLN_FB1 C103
R111
130
470k
HV_BCLN_FB2
VSS_130 SGND
3
139 TNR_SEN4
ANALOG
VDD_139 +3.3V
C92
HV_DCLN_FB C103
140
VSS_140 SGND
4
LED_VCC
143
HV_FUSER_FB VDD_143 +3.3V
C91
B4B-PH-K-E(LF)(SN)
C103
142
VSS_142 SGND
155
VDD_155 +3.3V
C94
C103
154
VSS_154 SGND
165
VDD_165
+3.3V
C102
C103
164
Test VSS_164 SGND
177
VDD_177 +3.3V
C109
BR_TSTMODEN C103
176
BR_TSTCLK VSS_176 SGND
190
VDD_190 +3.3V
C119
XTST C103
189
XSM VSS_189 SGND
201
SMCK VDD_201 +3.3V
C129
MST C103
200
VPDT VSS_200 SGND
MB87L8670
5 6
7 8
A
Q14 2SB1197K (RANK:R)
+3.3V
TP305
R72
22k
TP64
R73
1k
Q15 TP355
4.7k C
B +5V
E
10k
DTC143ZE
SGND
(1608)
U6 3
V+
C54
R71
C104
10k V-
BA10339FV 12
TP58 C47 TP63
C103
SGND
B
SGND
R54
100
pnew_sen1
1-1B
C35
TP71
C102
SGND +3.3V
R80
U6
4.7k
11
TP62 tnr_sen1
13 1E
10
BA10339FV TP72
R51 C31
10k C102
SGND
R50
120
(1608)
C
R68
100
pnew_sen2
C44 1-1B
TP69
C102
SGND +3.3V
R82
U6
4.7k
9
TP61
tnr_sen2
14 1E
8 TP70
C39 BA10339FV
R59
10k C102
R56
SGND
120
(1608)
R83
100
pnew_sen3
C53 1-1B
TP201
C102
D
+3.3V
SGND
R77
U6
4.7k
5
TP60
2 tnr_sen3
1E
4 BA10339FV TP68
C51
R75
C102
10k
SGND
R74
120
(1608)
R116
100
pnew_sen4
C77 1-1B
TP65
C102
+3.3V
SGND
E
R79
U6
4.7k
7
TP59
1 tnr_sen4
1E
6 BA10339FV TP66
C72
R108
C102
10k
SGND
R99
120
(1608)
Engine ASIC (CHRONOS)
Toner empty detect
New Toner cartridge detect
F
CODE LM9474-001
CIR B512250 (2/5)
NAME
7 8
Confidential