Brother FAX-170 Service Manual page 37

FAX-270MC/290MC/520DT/520MC/MFC370MC/390MC
1 2
+ 5
R 9
4 . 7 K 1
A
S W 1
1 4
R 2 7
4 . 7 K
2 3
1 6 C H O O K
S W 2
1 4 2
R 1 0 3
4 . 7 K
2
3
1 3 D C O V E R
S W 3
3
4 1
B
3
2
1 3 D P E
S W - 1 6 2 x 3
4 2 F D A S N O
4 3 D D A R E C
G N D
* C 2 7 * C 8 0
0 0
C
G N D
L 4
N . C
4 2 F D A S T
L 3
0
* C 6 7
N C
G N D F G
G N D
C U T T E R
:
1
2
D
+ 5 + 5 + E 5 + E 5
P 1 2
B 2 B - P H
W H I T E
G N D E 0 V
+ 2 6 V
R 3 8
7 5 K
E
R 4 5
C 3 3
1 0 K
1 0 4
E 5 V
R 4 9
E 0 V
7 5 F
R 4 6
1 0 0 F
R 3 9
C 3 2 C 3 0
7 5 F 1 0 4
1 0 4
E 0 V
F
1 2
1 SW1, hook switch sensor (microswitch)
2 SW2, cover switch sensor (microswitch)
3 SW3, paper empty sensor (microswitch)
4 Reset IC which turns on at the powering-on sequence and at any of the reset opera-
tions.
5 Connector for the control panel
6 FAX engine (ASIC) which integrates a CPU, digital portion of a MODEM and gate array
for managing the I/Os, memories, and drivers.
7 XT2, oscillator which oscillates at 16 MHz for the CPU.
XT1, oscillator which oscillates at 32.768 kHz for the calendar clock.
8
9 XT3, oscillator which oscillates at 57.6 MHz for the MODEM.
: Connector for the cutter HP sensor
3
+ 5
5
P A N E L
R 9 7
N C
5
R 1 0 1 4 7 0
1 1 5 B
3 1 5 B
R 9 5 4 7 0
2 1 5 B
4
P 6
C 7 4
C 7 9 C 7 6 C 8 4
B 5 B - P H
1 0 4
1 0 1 1 0 1 1 0 1
W H I T E
G N D G N D
# 8
T 7 D 6 0
R 1 4 3
1 7 1 6
3 3 A L I G T M I O 0 ( P W M ) A D P D M D
R 9 6 1 0 K
1 8 1 4
M I O 1 ( P W M ) A A P D M D
R 3 4 1 0 K R 1 4 1
1 9 1 2
M I O 2 ( P W M ) D P D M D T
R 1 4 0
2 0 1 1
5 2 C C L B S Y M I O 3 D P D M C K
R 1 4 2
2 1 9
5 2 D C L R X S M I O 4 A P D M C K
R 9 4 1 0 0 K 2 2 8
+ 5 M I O 5 A P D M D T
2 3 3
4 3 B T A D H M I O 1 1 C 5
2 4 2
4 4 D T X S L M I O 1 2 C 4
2 5 1
4 5 D H A F H M I O 1 3 C 3
6
2 0 5
+ 5
M V D D C 2
5
C 3 4 C 1
4
1 0 4
C 0
2 0 8 1 3
M V S S A M U T E
2 0 4 7
M O N M D C K M U T E
G N D
1 0 3 2 0 7
L I G T ( P W M ) M E X T L
2 0 6
* R 7 8 N C
M T X L
2 0 0 ( X 4 )
8 0
4 6 E S P O N S E O N ( O D )
2 0 0 ( X 4 )
7 6 1 0 9
+ 5 D A 0
S E N 2
7 7 1 1 0
+ 5 3 7 C F R N T S E N 3 D A 1
7 8 1 1 1
4 2 F T L O F 2 S E N 4 D A 2
7 9 1 1 2
S E N 5 D A 3
R 1 0 2 3 0 1 1 3
1 2 B P E S E N 6 D A 4
1 K
3 1 1 1 5
1 2 B C O V E R S E N 7 D A 5
3 2 1 1 6
3 6 B R E A R S E N 8 D A 6
1 1 7
D A 7
1 1 8
D A 8
R 1 4 5
9 2 1 2 0
3 2 E S T 1 S T 1 D A 9
C 8 2 R 1 4 6
9 1
3 2 E S T 2 S T 2
1 0 2 B
9 3 1 2 7
3 2 E H D C H D C D 0 0
9 4 1 2 8
3 2 E D I N D I N D 0 1
R 7 4 0
9 0 1 2 9
3 2 E D O U T D O U T D 0 2
G N D
1 3 0
D 0 3
1 3 1
D 0 4
1 0 6 1 3 3
3 4 C E 1 C S E 1 C S D 0 5
1 0 7 1 3 4
3 4 C S M C S P S L ( S M C ) D 0 6
1 0 2 1 3 5
3 6 C R D A T R D A T D 0 7
9 5 1 0
C L 2 V D D
9 8 4 3
C L 1 V D D
9 9 9 7
C L B V D D
1 0 0 1 1 4
3 2 A R B R B V D D
1 0 1 1 3 2
3 6 D S E O N D I F V D D
1 0 4 1 4 7
3 4 C , 3 2 A T G T G V D D
1 6 5
V D D
5 2 1 9 0
4 7 E V O L 3 R D A 6 1 V D D
5 6 2 0 1
3 3 B V I D C P 1 I V D D
5 5
3 3 D C P 3 I C P 3 I
5 4 1 5
C P 4 I V S S
5 3 3 8
C P N N V S S
6 0
V S S
5 0 8 1
R D A 6 V S S
5 1 9 6
+ E 5 A V D D V S S C 6 2
5 8 1 0 5
1 0 4
A V D D
V S S
4 9 1 1 9
R E F H V S S
4 8 1 4 2
R E F L V S S
4 7 1 5 6
A G N D V S S
C 3 6 C 3 9
5 9 1 6 4
A G N D V S S
1 0 4 1 0 4
2 0 0
V S S
E 0 V
3
Main PCB Circuit Diagram 1/5
4 5
4
+ 5 V
R 5 1
1 0 0
Q 6
R H 5 V A 4 3
R 5 3
1 . 5 K
2
V C C
R S T L 1 6 A , 3 6 D , 4 7 B , 1 4 B , 5 7 E
1
O U T
3
G N D
C 5 1
P C L K 1 0 4
( R 8 2
S D O T
N O P A T T R N )
S D I N
2 5 D
( R 8 5
P A T T R N
2 5 D
3 1
G N D
S H O R T )
B A R M W E
B A R M R D
2 X T 2
C S T 1 6 . 0 0 M X
7 G N D
R 6 0
2 2 K
R 6 5 N C
1 0 0
A D M D
1 4 A R S T L
A A M D
1 0 0
D M T
2 0 0
D M K
+ 5 B
2 0 0
A M K
A M T
C 5 0
C 4 9
C 3 1 0 2 B
1 0 4
C 4
C 5
C 0
G N D
C 1
C 2
A M U T
M U T
M O D E M T B U S
4 8 A , 5 8 D
L 1 6
# 9 T C 7 4 V H C U 0 4 F S
3 0 0
8 9 1 2 1 3
9
D A 0
R A 2
D A 1
R A 2 R 4 7 4 . 7 K
D A 2
R A 3
D A 3
R A 3
R 5 0
R A 2 D A 4 X T 3
2 2 0
5 7 . 6 M H z
R A 2 D A 5
R A 3 D A 6
R A 3 D A 7
C 4 3 C 4 3
D A 8
5 P 5 P
2 0 0
D A 9
M X 0 V
2 0 0
D A B U S
2 6 B , 2 6 E
D 0 L 1 3
M M Z R 6 0 1 A
D 1
D 2
D 3
D 4
D 5
G N D
D 6
D 7
+ 5
D B U S 2 5 E , 3 6 D
L 1 5
M M Z R 6 0 1 A
+ 5 M
C 4 5 C 5 3 C 5 7 C 1 1 7
C 3 7 C 4 8
1 0 4 1 0 4 1 0 4 1 0 4 N C 1 0 4
G N D
# 9
T C 7 4 V H C U 0 4 F S
4 5 3 1 1
4 5
III – 24
6 7
# 8
C 3 5
T 7 D 6 0
1 0 1
4 4 6 4
R S T R T C C O N R S T L 1 4 A
6 1
G N D
R V D D
1 4 3 6 2
E X T L R E X T
1 4 1 6 3
X T L R X T
2 0 0 ( X 4 )
R A 1 7 0
R A S 0 R A S 0
R A 1 7 5 2 0 2 C R X D
C A S C A S C R X D
R A 1 7 1 1 9 9 C K S
B A R M W E C K S
R A 1 7 2 1 9 6 T X D
B A R M R D T X D
1 9 7 R X D
R X D
R 1 3 9 1 0 0
1 2 4 1 9 8 C T S
R M R D R M R D C T S
1 2 3
R M W E
1 2 2 8 4 M M 1
R O M C R O M C M M 1
1 6 6 8 5 M M 2
I O R D M M 2
1 6 7 8 6 M M 3
I O W E M M 3
8 7 M M 4
M M 4
1 7 7
1 2 B P C L K P C L K
+ 5 B
1 7 6
1 2 B S D O U T
S D O U T
1 7 5 4 5
1 2 B S D I N S D I N T S T A + 5
4 6
T S T B
1 2 5 I O R Q
I O R Q
R 1 4 4
6 7 1 2 6 M R E Q
C K 3 2 O N M R E Q
6 6 1 4 0 C K 1 6
C K 3 2 C K 1 6
1 4 4
R 5 5 1 0 0 R 9 2
C K 8 M C 1 1 8
2 0 0
6 8 1 4 5 R D
N C
B A K C L K R D
7 3 1 4 6 W R
4 2 F R S T L B A E N B W R
7 4 1 6 8
B A V D D N M I
6 5 1 6 9
B A K S E L I N T
5 7 1 7 0
4 2 F A D L C L N C R ( C O M P ) B S A K
8 3 1 7 1
4 6 E V O L 1 S O L ( O D ) B S R Q
8 2 1 7 2
4 2 F E A T P W O N W A I T
1 8 7 1 7 3
C M L H
C M L R F S H
1 8 8 1 7 4
4 2 E R D P S D P S M 1
1 8 9
4 3 E P L S P L S
1 9 1 1 3 6 A 0
4 3 A T E L L T E L A 0
1 9 2 1 3 7 A 1
1 7 C H O O K H O O K A 1
1 9 3 1 3 8 A 2
4 2 F C I
C I A 2
1 9 4 1 3 9 A 3
4 2 F T L O F T L O F A 3
1 9 5 1 4 8 A 4
+ 5 S T D A 4
1 4 9 A 5
3 9
4 5 E R N G O R I N G A 5
4 0 1 5 0 A 6
5 4 A C T S E L S P O N A 6
1 8 4 1 5 1 A 7
4 6 D R N G L E 2 C S A 7
2 0 3 1 5 2 A 8
4 2 D O T O C T X D A 8
1 5 3 A 9
6
A 9
1 5 4 A 1 0
A 1 0
8 9 1 5 5 A 1 1
P O 1 A 1 1
1 8 5 1 5 7
3 3 C C L A M P P O 2 A 1 2
1 8 6 1 5 8
3 3 C C L P W M P 0 3 ( O D ) A 1 3
1 5 9
A 1 4
1 6 0
A 1 5
2 6 1 6 1
5 3 B C L S E L R M 1 M A 1 6
2 7 1 6 2
2 5 B L O N R M 2 M A 1 7
2 8 1 6 3
2 3 F S O L R M 3 M A 1 8
2 9 G N D
3 8 E P W O N R M 4
1 7 8 C L R S T
O D P I O 0
1 7 9 C L C I
O D P I O 1
R 6 6 N C
1 8 2 1 8 0 C L T X S
P I O 1 O D P I O 2
R 6 3 N C
1 8 3 1 8 1 C L C K
P I O 2 O D P I O 3
1 0 8 4 2
3 4 C S R A M P I O 3 ( S R A M ) O D P I O 4 V O L 2 4 6 E
4 1
G N D 2 5 B E P D O P I O 4 ( O D )
1 2 1 3 3
E P C L K
P I O 5 F D C L K
6 9 3 4
+ 5
P I O 6 F D O U T
3 5
F D I N
3 6
F C S 1
R 6 9 1 0 K
1 6 B P B U S
8 8 3 7
+ 5 E I T 1 F C S 2
P 5
N C
G N D
+ 5
L 2 0
0
1 4
C 3 8
1 0 4
1 7
M X 0 V
6 7
8
8
R V D D
C 4 0
A
1 0 4
G N D
R 5 2
X T 1
0
3 2 . 7 6 8 k H z
C 4 7 C 4 2
1 0 P 1 2 P
P B U S
1 7 B
G N D
B
M B U S 2 3 C
1 0 K
+ 5
Not mounted.
G N D
S B U S 3 4 D
C
A B U S 2 6 B , 3 4 D
D
P C I
+ 5
* L 1 1
1
* L 8
C R X D
8
* L 6
C K S
6 E
* L 9
T X D
3
* L 2
R X D
5
* L 5
C T S
7
* L 1 0
2
* L 7
4
0 X 8
* P 1 3
G N D
8 7 1 8 0 - X 8 8
F
8