Brother MFC-9420CN Service Manual page 397

(Japanese model)
A. NCU PCB: MFC-9420CN
+24V
D6
1SS120
J2 AL1,2,3
3mm
SW1
11
L3
7
AL1
R41-4910-A KU10S31N
AL2
A5X-G-24E-908
La
3
Lb
4
RA-351M-V6-2
LINE
NC L4
FG
7
AL3
NC
FG
8
J2
RA-242M-C6
FG2
C
E
6B
TELOFF
GND
FTR-C2CA024G
L1
C1
R41-4910-A
11
XX C100 10V
3
XX
4 6
L2
EXT.
16
-
CR1
NC
FG
7
NC
FG
8
J1
Q3
C
RDPS 1SS120
6B B
E
DTC114YUA
GND
+5V
R34
1k
C17
C19
R33
C104
1k
C470
6.3V
GND
U1
6A
CML
12
100 2W
2
R7
1
C4
C333
400V
T3
MTZJ2.0-A B
R12 1/4W R23
1 6
15k 0
NC
ZD3
A R14
5
PH2
3
4
15k
ZD2 10k
BT-28
1/4W
R10
0
MTZJ2.0-A B R25
K
PS2533-1 REF
C5
C474
24k
GND 250V
R11 R13 PH3
A
C
6B
1/4W 24k1/4W
TLP421
E
K
+24V
GND
13
9
4
8
1
+
CIO
6C
D5
U1
BA10358
R35
6 -
REF
7
+ 0
5
R36
0
C6 12.5mm x 20mm
1 -2 GND
C11 C12 C563
C21
C10
50V C2.2
T1 35V
+ +
6
1
R26
510
NC
1/10W
5
R27
TP7
3 4
2.7k
BT-17
GND
C10
R38
C184
4.3k
RL2
6B
R21 100k
R22 100k
R37
TP1
C20
4.7k
C222
CI
REF
+24V
TP3
E
Q6
C
Q8
R18
B1641
22k B
CHRG
E C
6B B
DTC114YUA
GND
D1NL20U
C
Q7
B C3328
GND
E
ZD1
L5
RD9.1E-L
L6
(B53K785-T )
( )
0.25mm
1 -2 3mm
SL
6B
C15 C221
R31 100k
+5V
8
BA10358
-
2 GND
RL1
1
+ 6B
3
U1
R32
4 C18
3.3k
C104
GND
GND
R30 C14
C221
100k
REF
C2
C221
D2
ERA15-04
D4 C6 12.5x20mm
ERA15-04
T2
R2
1k
+24V
GND
D9
TP2
Q4
Q5
C2551-O(TPE2) C
R15
GIJI
B
B
6B 10k
E
DTC114YUA
GND
GND
C7
R19
620
C103
1/4W
US:0V
EUR:0.5V
ASA:1.0V
OCE:1.5V
P1
JPN:2.0V
14 MODEL
13 +24V
+24V
R28 12 CML
CML
15k
2A
11 CI
CI
3B
10 GND
GND
9 TELOFF
TELOFF
1B
8 +5V
+5V
7 SL
SL
5A
6 RL1
RL1
5B
5 PLS
PLS
2A
3A
4 RL2
RL2
3 RDPS
RDPS
1C
2 CHRG
CHRG
3C
1 GIJI
GIJI
5C
B14B-PASK-1(LF)
CIO
3C
C
R6
Q2
C2551-O(TPE2)
22k B
C
E
E
GND
Confidential