Brother MFC-9420CN Service Manual page 395

A. NCU PCB: MFC-9420CN (U.S.A. model)
L7
L8
MJ-66J-RD315(LF)
L4
NC
S
1 RA-242M-C6
Ta SBT
2
AL2
La
3 @AL3
Lb P3100
4
Tb
L3
5
JW1
NC
E
6
SBT
NC FG
FG
7
FG
8
J2
A @PH2
C
E
K
PS2533-1
GND
L2
SBT
MJ-62J-RD315(LF)
XX L1
3
XX
4
SBT
NC
FG
7
NC
FG
8
J1
+5V
U1
@R25
BA10358
620
-
6
+
5
C17
C6
@R24
6.3V C104
620
C470
GND
+24V
@SW1
11 12
2
7
1
D3
CML
JW9
6C
1SS120
@CR1
1 12
5
4
3
NC
NC 8 100 1/4W
9
NC
10
@R8
@D4 1SS120 JW6
@CR2
1 12
5
JW3
4
3
NC
NC 8
9
NC
10
@SW2
11 12
2
7
1
0
1/4W
@R1
@Q3
C
RDPS
B
6D
E
DTC123EK
GND
@C1
C474
24k 1/4W
250V
@C25
C100 10V
@ZD2
@ZD1
@C24
JW
JW
C105
AK2
AK1
PH1
TELOFF
E C
6C
TLP320(F)
GND
R20
REF
7
JW12
0
JW13
R21
0 GND GND
100 2W
@R9
@C20 @C18
C153 C473
@T1 BT-17
@C21 @C19
NC
C153 C682
@L5 @L6
@C3
JW5
@T2
@C7
BT-6A
+
C2.2
C10
NC
16V
GND
@DB2 +5V
A2
S1ZB60
-
+
A1
@D5
@PH5 A
ERA15-04 C
E
K
TLP421 @Q2
@Q1
C
JW8
C
CHRG
B
JW7
B 6D
E
E
KTD1411
JW2
DTC123EK
GND
@R4
@R3
PH3
A JW4
C
1/4W 24k
CI
6C
TLP421
E
K
GND
@PH4
AK1
C
POL
6D
E
AK2 TLP620
GND
@C12
C103
@C5
16V C10
+
SL
@R19 910 6C
@R23
0
@C15
TP6
C224
C8 C561
@C14
C822
@R22
TP7 @R13 68k
4.7k
+5V
8
R30 0
R12 100k
- U1 JW11
2
BA10358
C9 1
+
C101 3
R17 R31 0 @R14
C16
TP5
4 2k
100k C104
@R16
2k
GND
GND
TP4
C13
@R15
@R18
C561
@C11 68k
9.1k
C103 GND
REF
REF @R26
0
GND
B53K812-2
RL1
6C
US:0V
EUR:0.5V
ASA:1.0V
OCE:1.5V
P1
JPN:2.0V
13 MODEL
12 +24V
+24V
11 CML
CML
2A
10 CI
CI
4C
9 GND
GND
8 TELOFF
TELOFF
3D
7 +5V
+5V
6 SL
SL
6B
5 RL1
RL1
6B
4 PLS
PLS
1B
3 POL
POL
4C
2 RDPS
RDPS
2C
1 CHRG
CHRG
4B
B13B-PASK-1(LF)
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