Brother 8250P - FAX B/W Laser Printer Service Manual page 181

1
A
R I N G
+ 5 V 7 4 C
7 3 B
7 1 C
R 1 4 0
7 2 B
2 2 K
7 3 C
A D L C
7 1 C
7 2 D
7 2 C
7 2 D
C 1
7 2 A
C 6 3 T L O F
7 2 A
C C 1 0 4
7 2 D
D P S
7 2 D
P L S
7 1 A
S 0 V
C M L H
7 2 A , 7 3 C
M I N T
4 4 C
R 1 3 8
U C A S
2 4 A , 2 4 A , 2 4 C
F A N C N T
5 6 D
E S D
2 3 D
B
R 1 3 7
R A M R D
2 4 A , 2 4 B , 2 4 C
C A S R 1 3 9 6 8
2 4 A , 2 4 A , 2 4 C
R A S 3
2 4 A
R A S 2 R A S 2
2 4 A
R A S 1
2 4 A , 2 4 B
R A S 0
2 4 A
2 1 B , 2 1 D
R 1 3 6
R M W R
2 4 A , 2 4 A , 2 4 C
X T 2
C - 0 0 1 R
C 9 5
C C 8 P
+ 5 V
S 0 V
C 1 2 3 R 1 5 4
1 6 A , 2 6 A
C C C 1 5 4
Q 1 1 . 5 K
2 3 4 C , 6 5 D
( 2 1 2 5 ) 5
R S
1
C 1 2 4
S 8 0 9 4 2
C C 1 0 4
R 1 5 7
4 C 1 2 2
2 2 0
C C 1 0 2
3
S 0 V
S 0 V
X T 1
C 1 2 6
C C 1 5 p
S 0 V
D
1
2
A S I C M F C 2
7 6 9 3 F A N 1
R I N G S E N 5 5 5 D
T E L
7 4 7 5 S P O N
T E L S P O N 7 5 B
M U T E R N G
9 1 1 2 2
S E N 3 P 7 1 7 5 C
T L S W
9 0
S E N 2
D A R E C
6 8 2 0 8
P W M 3 D 1 5
8 2 2 0 7
A N 0
D 1 4
D A S T
6 7 2 0 6
P W M 2 D 1 3
D A S E N D
6 6 2 0 5
P W M 1 D 1 2
P O L
8 8 2 0 4
S E N 0 D 1 1
C L K 2 4
7 7 2 0 3
C 1
D 1 0
3 5 C
8 9 2 0 2 R 1 1 4
S E N 1 D 9
E A T
9 5 1 9 9
S E N 7 D 8
7 2
D P S
7 3 1 9 8
P L S D 7
7 1 1 9 7
C M L D 6
4 0 1 9 6
M I N T D 5
1 9 5
D 4
6 8
6 1 9 4
U C A S D 3
1 2 4 1 9 3
P 7 3 D 2
1 3 3 1 9 2
E E D A T D 1
D B U S
1 0
7 1 9 1
R A M R D D 0
R 1 3 4 1 0 R D
5 1 6 7
# 5
2 2 B , 2 2 D , 2 6 A
L C A S R D
4 1 6 3 3 5 C , 4 4 C
R A S 3 H W R
R 1 3 5 1 0
L W R
3 1 6 6
R A S 2 W R 2 2 B , 2 6 A
2 1 1 1 V O L 2
3 5 C , 4 3 B
R A S 1 7 5 D
S E N 8
1 1 6 8
R A S 0 A 2 0
R O M 1 1 6 2 1 6 9 4 5
R O M 1 A 1 9
1 0
8 1 7 0 3 6
R A M W R A 1 8
9 1 7 1 2 7 R A 1
N C
R A M U W E A 1 7
1 7 1 7 2 1 8 6 8 x 4
R X T A 1 6
1 6 1 7 3
4 4 5 5 5
R E X T A 1 5
3 3 6 6 6
1 7 4
A 1 4
1 7 5 2 2 R A 2
7 7 7
A 1 3
6 8 X 4
1 7 6
1 1 8 8 8
A 1 2 + 5 V
1 7 7 4 4 5 5
D A 1 1
C 9 6
6 6
1 7 8 3 3
C C 1 2 P D A 1 0
1 7 9 2 2 R A 3
7 7
D A 9
1 8 1 6 8 x 4
1 1 8 8
D A 8
1 8 2 4 4 4 5 5 5
D A 7
1 8 3 3 3 3 6 6 6
D A 6
R 1 5 5
R A 4
1 8 4 2 2 2 7 7 7
D A 5
1 K
1 3 0
1 8 5 1 1 1 8 8 8 6 8 x 4
R S T D A 4
1 8 6 4 4 4
5 5 5
D A 3
1 8 7 3 3 3 6 6 6
1 1 8 D A 2
E X T L
R A 5
1 8 8 2 2 2 7 7 7
D A 1
R 1 5 8
1 8 9 1 1 1 8 8 8 6 8 x 4
A B U S
D A 0
1 M
1 1 7
E X T L
2 4 . 5 7 M H z
C 1 2 7
C C 1 5 p
R A 1 2
1 5 0 x 4
D 7 R D 7
4 4 4
5 5 5
D 6 R D 6
3 3 3 6 6 6
D 5 R D 5
2 2 2 7 7 7
D 4 R D 4
1 1 1 8 8 8
D 3 R D 3
4 4 4 5 5 5
D 2 R D 2
3 3 3 6 6 6
D 1 R D 1
2 2 2
7 7 7
D 0 R D 0
D R B U S 1 1 1 8 8 8
R A 1 3
1 5 0 x 4
2
3 4
M S I L
H A I S I 9 4 6 5
5 1 C S E N 6 P A 3
M C E
3 9 2 9 P M 1
4 4 B M C E P M 1
M R S T 4 1 3 0 P M 2
4 5 C M R S T P M 2
P C L K
4 4 3 1 P M 3
3 3 C P C L K P M 3
S D O U T 4 6 3 2 P M 4
3 3 D S D O U T P M 4
S D I N 4 5 3 3 H O O K
3 3 D S D I N C M P P A
C I S C L K 5 6 3 4 R S E N
C M P P B
3 4 C S M P C
C M P R A 3 5 3 7 S O L
5 3 C S O L
C M P R A
C M P R B 3 6 S C N 1 0 1 S C C K
5 3 C C M P R B
C L K
L 7 L L 2 4 1 4 2 D R I V
1 0 2
C L K 2 4 D R I V E
2 0 0 C S I P 5 5 9 8 S C D T
V D O
3 4 C C S I P
L D O N
P D 4 7 9 9
3 6 C I P D 0 L D O N
T E N H
4 8 1 0 3
I P D 1 H V T P
T E N L
4 9 1 0 4
H V T N
I P D 2
T A I D
5 0 1 0 5
I P D 3 H V C H
G E N Z
5 1 1 0 6
I P D 4 H V G Z
V C L N
5 2 1 0 7
I P D 5 H V C L
E L
5 3 1 0 9
I P D 6 E R A S E
H T O
5 4 1 0 8
I P D 7 H T O
5 8
R B
# 5
X V D O
5 7 2 4
S H E X V D
1 4 1
5 9
C L 2
C B S O N
6 2 1 6 0 H B U Y
C L 1 H B U S Y
T G 6 3 1 5 9 S E L I N
S E L I N
3 2 B , 3 5 C T R G
P R M I N T
L E D 6 4 1 5 8
P R M I N T
3 2 A P A 2
2 0 1 F L T
1 5 7
V D D F L T
1 9 0 S L C T
1 5 6
V D D S L C T
1 6 5 P P E
1 5 5
V D D P P E
1 4 7 1 5 3 B U S Y
V D D B U S Y
1 1 4 1 5 2 A C K
V D D A C K
9 7 1 6 1 S T B
V D D S T B
6 1 1 4 3
V D D D C 7
4 3
1 4 4
V D D
D C 6
5 1 B
C C 1 0 4 x 6
2 1
1 4 5
V D D D C 5
1 4 6
D C 4
1 4 8
D C 3
1 5 1 4 9
G N D D C 2
3 8 1 5 0
G N D D C 1
6 0 D C B U S
1 5 1
G N D
D C 0
9 6
G N D
1 1 9 1 3 5
G N D P 8 4
1 4 2 1 3 8
G N D C T S
1 5 4 1 3 7
G N D R T S
1 3 9
1 6 4
G N D R X D
1 8 0
1 4 0
G N D T X D
2 0 0 1 3 6 O P O N
G N D
P 8 3
S 0 V
D B U S
3 4
5
L O C K
1 1 3
P B 5
5 3 B
5 5 A R 1 4 1 0 1 0 0
B D
5 5 C B D
5 5 A R O M 2 1 3 1
2 2 B , 2 2 D E R O M 2
5 5 A R E S I
1 2 1
5 1 C P 7 0
5 5 A 1 2 5
T C S
5 1 C P 7 4
5 5 A C O V E R 1 2 6
P 7 5
5 1 C
5 5 C 1 2 7
T N O R
P 7 6
5 3 A
3 3 D
S O T H R 8 3
5 1 D A N 1
5 6 C H E T H 8 5
5 1 B A N 3
5 3 B
8 4
A N 2
5 3 B 1 1 0
L A S P
5 5 B R M 1 2 5
R M 1
5 3 C
5 1 A R M 2 2 6
R M 2
5 3 C
5 1 A R M 3 2 7
5 3 C R M 3
5 1 A R M 4 2 8
5 3 C R M 4
5 1 A
M T I 0 1 1 5
5 3 C P A 0
5 1 A M T I 1 7 8
5 3 D P A 1
5 1 B X S E N 1 3 4
P 8 5
2 6 B
5 3 B
+ 5 V
5 1 D E X C S R 1 2 4 2 2 K 2 2
2 6 A E X C S 1
+ 5 V
2 6 A # 5
E X I N T R 1 1 3 2 2 K 2 3
2 6 A E I N T 1
C 1 0 1
R 1 5 6 C C 1 0 1
6 5 B
+ 5 V
S 0 V
6 5 B S R A M 2 2 K 1 2 3
3 4 C P 7 2
6 5 B E E C K 1 3 2
E E C K
2 3 D
6 5 B 7 0
S 0 V A M 8 1 6
6 5 B
6 9
P W M 4
6 5 B
6 5 A V O L 3
1 2 8
7 6 C P 7 7
+ 5 V
6 5 A V O L 1 1 2 0
P B 6
7 5 C
Q 2 5
6 5 B 1 2 9
2 S C 3 9 2 8 A C L K
H V C R
R 1 4 4
9 2
M T D I 1
5 5 A
1 0 K S E N 4
S A M P 1 1 2
R 1 4 5 C 1 1 5
C 1 4 1 3 6 C
S E N 9
1 0 K C C 1 0 4
C C 1 0 4
S 0 V S 0 V S 0 V
+ 5 V + 5 V
P 2
+ 5 V
B 6 B - P H
6 5 C
R 1 8 1
R 1 8 0
1
2 2 K
2 2 K
C T S
4
R T S
3
R X
5
T X
6
2
P C B C H
S 0 V
A
Main PCB 1/8
5
6
1 8 1 8 R V D D R V D D
A
6 6 B
R V D D R V D D
C 9 9
C C 1 0 4
S 0 V
R S
1 9
R T C C O N 1 1 C
1 0
B A V D D + 5 B
C 9 8
C C 1 0 4
S 0 V
R 1 1 0 1 0 0
1 3
C K 3 2
C 9 7
C C 1 0 2
S 0 V
1 1
B A C L K
1 2
B A E N B
* R 1 2 3
+ 5 B
0
)
(
* R 1 2 2
V D D
2 2 K
B
Q 2 3
O U T
R H 5 V A
1 4
C K 3 2 0 N
+ 5 B
G N D
S 0 V
R 1 1 2
2 0
B K S L
R 1 1 1
0
M 5 V
S 0 V
8 1
A V D D
C 1 1 4
C C 1 0 4
8 0
A G N D
M 0 V
1 1 6
T S T 1
C
7 9
T S T 2
8 6
T S T 3
8 7
T S T 4
S 0 V
S 0 V
S 0 V S 0 V
S 0 V
R 7
R 1 0 R 1 6 5
0
0
F G F G
F G
D
6