Brother HL-4040CN Service Manual page 309

Main PCB Circuit Diagram (5/6)
1
2
Engine I/F, Power supply, Reset IC, Panel I/F
CN5
POWER
1 3.0A
+3.3V
+3.3V
A
2 TP7 TP19 TP37
+3.3V C12
C121 10CE101FS
3
+3.3V
10V C100
C103
4 ( 6.3)
SGND
5
SGND
6
SGND SGND
06/10/13
2.0A
7
+6.8V +6.8V
TP29TP1
C223
B07B-PASK-1(LF)(SN)
C100
10V
10CE101FS
SGND
+3.3V
Engine
R11
CN4
47k
1
BD0n LASER_BD0_N
1-3D
+3.3V
R10
B 47k
2
BD1n
LASER_BD1_N
1-3D
3
GND
SGND
R9
33
4 19200bps
STATUS ENG_STATUS
1-4C
(For EMI) C8
TP18
C101
(For EMI)
SGND
R8 33
5 19200bps
COMMAND ENG_COMMAND
C7 1-5C
(For EMI)
TP17
C101
(For EMI)
SGND
R7
33
6
STSREQn ENG_STSREQ_N
1-5C
(For EMI)
C6 TP16
C101
(For EMI)
C
SGND
7
IREADYn ENG_TOP_N
1-3D
TP28
R6
33
8
CMDREQn ENG_CMDREQ_N
1-4C
(For EMI) TP15
C5
C101
R5 SGND
33
9
CMDRDYn ENG_CMDRDY_N
1-4C
(For EMI)
C4 TP14
C101
SGND
R4
33
10
E_RSTn ENG_RST_N
1-5C
(For EMI)
TP13
C3
R12
B10B-CZHK-B-1(LF)(V)
C101 10k
(For EMI)
SGND
SGND
D
FG
R88
TP9
TP485 0
SGND SGND
(1608) R94
0
FG1 FG3
(1608)
E
R221
TP487 TP5
0 (1608)
SGND SGND
R3 0
(1608)
F
FG2 FG4
1 2
3 4
D3
RB751V-40
Q3
(SOT-223)
300mA
+6.8V IN OUT +5.0V
0.7
GND LD1117S50TR C31 (TO CDCC,Panel,Super Cap.)
C122 TP49
(FCT)
10CE101FS
C104
10V C100
C123
( 6.3)
C104
SGND SGND
@D1
RB751V-40
@Q1
1608 (TO-252) 1608
500mA
+6.8V +5.0V_WLLAN
IN OUT
1.0
GND MM1665AT (TO Wireless LAN)
TP36
(FCT)
C105
C105 @C17
@C119
C104 @C220 10CE101FS
@C219 @C16 10V C100
C104 ( 6.3)
SGND SGND
D2
RB751V-40
(Vour>Vin )
Q2
(TO-252)
1608
1608 500mA
+6.8V IN
OUT
1.0
GND MM1665AT C18
TP38
(FCT)
C105 C105
C120 10CE101FS
C104
C221 C100
C222
10V
C14
( 6.3)
C104
SGND
D4
RB751V-40
Q4
(TO-252)
800mA
+3.3V
IN OUT 1.5
1608 ADJ FAN1086DX 1608
TP448
(FCT)
R218
C111 C218
C86
TP463 820 10CE101FS
10CE101FS C217 1%(F)
C202 10V C100
10V C100 C176 C105
C206 ( 6.3)
C104
( 6.3) C104
C105
C106
SGND
VOUT=1.25V*(1+200/820)
=1.56V
+5.0V
D5
1SS355
U17
2 3
0.5
VDD VOUT
C203
TP430
R220 C104 C108
(FCT)
1k
C104
C0.22F 4 1
C104
CE GND
Cap. 5.5V
RQ5RW33BA-TR-F Spec Vdiff=55mV(min)
EM0H224Z
SGND
U15
2
SGND
VDD
C103
C104
4
CE
MM3031FU
U16
(Io(max)=50mA)
2 4
VDD OUT
3
CD
C103
C197
TP428
1
SGND VSS
C101
C102 S-80920CLNB-G6YT2G
(CMOS output)
System RESET
U20
2 4 (Io(max)=50mA)
VDD OUT
+3.3V
3
TP369
CD
(FCT)
C103
C186 TP415
*Main ASIC(RSTICN )
1
VSS
SGND
C89
C473 S-80928CLNB-G6YT2G
4 3
10%(B) (CMOS output)
Reset time(td)=(3.8 6.4)*Cd(nF)
SC-82AB
td(min)=3.8*42.3nF=161ms
td(max)=6.4*51.7nF=331ms
1 2
3 4
6-5
5
6 7
LVDS
VIDEO0_N
1-5D
TP491
LVDS
VIDEO0_P
1-5D
TP492
LVDS
VIDEO1_N
1-5D
TP493 LVDS
VIDEO1_P
1-5D
TP494
LVDS
LVDS
VIDEO2_N
1-5D
TP495 LVDS
VIDEO2_P
1-5D
TP496
LVDS
VIDEO3_N
1-5D
TP497 LVDS
VIDEO3_P
1-5D
TP498
+3.3V
GND
R96
R92
4.7k
100
1005
MM1665AT (For EMC)
LD_EEROM_DATA
1-3C
C10
TP21
R234
+3.3V C22P
Vin Vout
+5.0V_USBHOST (for EMI) 47k
(TO USB HOST)
R97
SGND
R233 10k
R93
100
1k SGND
(For EMC)
LD_EEROM_CLK
1-3C
SGND TP22 C11
C101
(for EMI)
SGND
+1.5V
+3.3V
R44
Vout 10k
PANEL_CLK
FAN1086DX 1-6C
TP347
+3.3V
GND Vin
R38
10k
SGND
PANEL_COMMAND
1-6C
TP318
RTC3.3V
PANEL_RESPONSE
(to ASHURA RTC) 1-4C
TP451
TP292 C73
(FCT)
C101
SGND
3
0.5
VOUT RTC1.5V
(to ASHURA RTC)
TP412
(FCT)
C190
1 C104
GND
SGND
RTC_RESET_N
1-6B
TP387
(FCT)
4 3 +5.0V +5.0V +5.0V +5.0V
SC-82AB
R1 R2 R45 R83
4.7 4.7 4.7 4.7
1 2
TP4 TP3 TP354 TP479
C1 C2 C80 C114
C104 C104 C104 C104
SGND SGND SGND SGND
+3.3V +3.3V +3.3V +3.3V
RESET_N
3-1A/1-1A/1-6B
R87 R62 R20 R13
4.7 4.7 4.7 4.7
TP484 TP436 TP136 TP20
C115 C98 C41 C13
C104 C104 C104 C104
SGND SGND SGND SGND
5 6 7
8
LVDS
CN1
A
1
SGND GND
2
VIDEO0_N
LD PCB:
3
VIDEO0_P VIDEO2
4
SGND GND
5
VIDEO1_N
LD PCB:
6
VIDEO1_P VIDEO1
7
SGND GND
8
VIDEO2_N
LD PCB:
VIDEO4
9
VIDEO2_P
10 GND
SGND
11
VIDEO3_N
LD PCB:
12 VIDEO3
VIDEO3_P
13
SGND GND
14 B
E2P_SDA
TP499
15
E2P_SCL
TP500
15FMN-BMTTN-A-TF(LF)
PANEL
CN11
5
SGND GND
R43
100
(For EMC)
4 C
PCLK
C78
C101
(for EMI)
R37
SGND
100
(For EMC)
3
COMMAND
C75
C101
(For EMI)
+5.0V
SGND
R36
R35 10k
100
2
RESPONSE
1
+5.0V +5V
C67
C103
292161-5
SGND
D
C128 C117
C101 C101
+3.3V +1.5V +5.0V +3.3V
C116
C101
E
+5.0V +3.3V
+3.3V +3.3V +3.3V +3.3V
C113 C29 C27 C19
C104 C104 C104 C104
SGND SGND SGND SGND
F
CODE LM9444-001
NAME CIR B512246 (5/6)
8
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