Brother MFC 1870MC, Service Manual, Page: 174 / 217

+ 2 5 V
+ 5 V
R B 1 2 E
L A T C 1 5 C
H R L Y 3 6 E
C P 3 I 1 2 F
H D C 1 2 D
G N D
+ 5 V
C I S
P 9
B 7 B - P H
1
2
9
4
3
S T 1 1 2 D
R I B O N 1 2 D
T M
1
4
1 0
P 5
B 1 1 B - P H
R 1 0 7
3 3 K F
R 1 0 8
1 0 0 K F
R 1 0 5
1 0 K
T G 1 2 E
+ 5 V
G N D
R 5 V
7
V I D 1 2 E
Q 8
2 S C 3 0 5 2
G N D
Q 1 0
K R C 1 0 7 S
R 0 V
Q 1
2 S D 1 8 5 8
R 3
1 W
3 0
C P W M 1 5 D
R 1 0 2
1 0 K
R 1 0 0
2 . 2 K
R 0 V
R 0 V
R 5 V
R 1 0 1
1 0 K
R 5 V
L I G T 1 1 C
R 5 V
R 0 V 6
5
C 8 2
C C 1 0 4
G N D
C 8 5
C C 1 0 1
C 8 6
*
1 1
6
C 8 7
*
S T 2 1 2 D
D O U T 1 2 E
D I N 1 2 E
8
C 8 3
*
R 1 0 6 1 0 0
R 1 0 4 2 0 0
C 8 8
C C 1 0 1
C 8 4
C C 1 0 1
C 8 9
C C 1 0 1
7
2
3
5
G N D
R 0 V
R 1 0 9
1 0 K F
Q 9
2 S K 1 3 9 9
Q 7
2 S C 3 0 5 2
C 8 1 6 V / 1 0
R 9 7 4 7 0
R 9 8 2 7 0
R 5 V
C L M P 1 5 D
R 1 0 3 1 K
R 9 9 2 2 K
C 8 0
C C 1 0 4
R 0 V
R S T H V D D
V D D
V D D
T E M P
A T A P
P O R T 2
P O R T 3
T R I G
D G N D
M T P
S D / P D 7
P D 6
P D 5
P D 1
D 0
D 1
D 2
D 3
D 4
D 5
D 6
D 7
A 0
A 2
A 3
A 4
A G N D
A G N D
A V D D
4 2
4 0
4 1
3 5
3 4
3 1
4 3
1 0
2 4
5 6
9
1 7
2 6
4 9
6 4
4 7
4 8
5 0
5 4
5 9
3 6
4 6
2 0
1 8
1 6
1 5
8
7
6
5
4
3
2
1
R 0 V
R 5 V
R 0 V
# 1 0
L C 8 2 1 0 2 W
D B U S 1 4 E
1 1
1 2
A 5
A 6
A 7
A 8
1 4
1 3
1 9
A 1
P D 4
P D 3
P D 2
5 1
5 2
5 3
S A M P
R S
3 3
6 2
S H
C L K 1
6 3
6 1
C L K 2
6 0
P D 0
5 5
D A C K
5 7
D R E Q
5 8
R D A T 1 2 E
+ 5 V
3 0
2 9
2 8
2 7
2 3
2 2
2 1
2 5
3 2
I C L K
I O C S
M C S
I O E
M E
R D
W R
C L K I N
R E S E T
1 5 D S R A M
3 9
R S T L
A I N
3 8
4 5
4 4
P O R T 0
P O R T 1
3 7
A D R E F L
R 0 V
C 9 9
C C 1 0 4
C 9 8
C C 1 0 4
C 1 0 1
C C 1 0 4
C 8 1
C C 1 0 4
C 7
1 6 v
1 0
R 1 2 3
3 0 0
R 1 2 1
0
R 1 2 2
2 0 0
C 1 0 2
C C 1 0 4
C 1 0 0
*
A 8
R D
W R
C K 1 6
D 7
D 0
D 1
D 2
D 3
D 4
D 5
D 6
D G N D
D G N D
D G N D
D G N D
G N D
M R E Q
I O R Q
R 5 V
1 6 D A B U S
G N D
A 5
A 6
A 7
A 4
A 0
A 2
A 3
A 1
1 4 A R S T L
1 6 B R B U S
1 2 E T G
1 2 E S M C
1 2 E E 1 C S
3 3 F H R L Y
+ 5 V
F R N T 1 2 D
P W O N 1 5 D
C M L H 1 5 B
P H 1
S G - 1 0 5 F 3 0 8
+ 2 5 V
R E A R 1 2 D
P H 2
S G - 1 0 5 F 3 0 8
# 1 3
U M G 5 N
1
3
6
4
2
R 1 2 4
1 0 0 K
R 1 2 8
1 0 0 K
G N D
P 1
B 5 B - P H
B L A C K
1
S E N S O R
3
4
2
G N D
1 2 D F S E N
1 2 D R S E N
4 2 E C M L L
R 1 2 9
1 0 0 K
+ 5 V
G N D
C 1 0 3
C C 1 0 2 B
C 1 0 4
C C 1 0 2 B
R 1 2 6
1 0 0 K
+ 5 V
G N D
C 1 0 9
C C 1 0 2
5
1 2 E S E O N
G N D
Q 1 3
K R C 1 0 7 S
C 1 1 2
*
1 2 3 4 5 6 7 8
2 1 3 4 5 6 7 8
A
B
C
D
E
F
A
B
C
D
E
F
(Mounted on the FAX1170/1270/
MFC1770/1870MC)
(Mounted on the FAX1570MC/MFC1970MC)
1. Electronic devices marked with an asterisk (*) are not mounted.
A
MAIN 3/5
(FAX1570MC/1030/MFC1870MC/
1970MC)