Color; Handset - Brother FAX1170 Service Manual

1 2
C 2 0 C C 6 8 1
1
A
R 2 3 5 6 K
N C U
S L 1 4
9
# 1 8
K I 3 2 4
R 2 2
1 / 1 0 W
1 K
M 0 V
1 1
C N T
R L 1 1 3
1
6
B
R L 2 1 2
7
0 # 1 9
4 0 5 3
2
-2
D 4 *
R 1 3 0
C
R 1 8 0
D 5 *
5 T L S L 5 1 B , 5 3 B
R 1 5 1 . 5 K
1
R 1 4 R 1 6
4 . 7 K 0
R 1 7
M 0 V
*
D
Q 3
K R C 1 0 7 S
A R E F
O T O 1 5 C
R 1 2 1 0 0 K
C 1 9
C C 1 0 4
M 0 V M 0 V
1 0 + 5 V
C 1 1 0
C C 1 0 4
+ 2 6 V
1 1 G N D
E
1 2 + 2 6 V
D 9
1 S S 1 2 0
R 5 1 K
3
8
1 3 R D P S 1 5 C
+ 5 V
1 4 E A T 1 5 B
1 6 A D L C 1 5 B
1 7 D A S T 1 1 D
R 6 R 3 7 R 4
1 K
2 2 K 2 2 K
1 8 D A S N D 1 1 C
2
1 5
4
F
C 1 2
P 1 0
C C 1 0 3 B
I M S A - 9 1 1 0 S - 1 8 L
G N D
1 2
1 Connector for the NCU
2 Analog signal selectors
2-1: Selects either input signals from the handset or those from the MODEM.
2-2: Selects either RL1 or RL2 signals inputted from the communications network.
2-3: Selects either sound signals (e.g., alarm beeps, key clicks and ringer sounds)
3 Voice switching analog selectors
3-1: Switches between the output line and input line for monitoring. When
3-2: Selects either voice signals inputted from the communications network or re-
4 Amplifier circuit for signals outputted from the MODEM.
5 Analog front end IC which processes the analog I/O signals from/to the MODEM.
6 Amplifier & shaper circuit for signals inputted from the communications network.
7 Telephone circuit for transmitting signals.
8 Speaker amplifier circuit which amplifies sounds issued from the above analog signal
selector 2-3 and feeds them to the speaker.
3 4
2
-1
T E L L 1 5 C
1 0
C N T
R 3 1 1 0 K C 2 7 C C 1 0 4 0 2
C T S L 5 3 B
1 3 1 5
C
-
1
R 2 1 1 0 K
# 1 9 1
1 2
4 0 5 3 R 3 3 1 . 5 K
+ + 5 V
+ 2 6 V
R 2 0
*
D 8
C 2 3
*
C M L H 1 5 C
M 0 V
T A D H 1 2 C
R 2 8
1 0
C 5 7 R 7 1
C N T
1 4 2
C 0 C C 1 0 4 2 7 K
1 5 2
C
-
1
# 1 7
1
3
4 0 5 3
+
R 7 4
1 0 0 K
A R E F
5 3 B C T S L
D 7 1 S S 1 2 0
7
D 6 1 S S 1 2 0
C 2 1 C C 6 8 1
R 2 4 1 5 0 K
R 2 5 2 0 0 K
9
- T L R L 5 3 A
8
C 2 2 C C 1 0 3 B
1 0
+
# 1 8
K I 3 2 4
A R E F
R 1 9 *
D A R E C 1 1 C
Q 4 *
R 7 2 1 . 5 K
R 7 3 1 . 5 K
3
-1
P L S 1 5 C
C M L L 3 6 E
+ 5 V
T L O F 1 5 C
T L O F 2 1 2 D 1 6
C I 1 5 C
# 1 9
C 2 6
C C 1 0 4
4 0 5 3
6 7 8
M 0 V
G N D M 0 V
3 4
Main PCB Circuit Diagram 4/5
generated by the FAX engine or signals selected by 2-2.
switched to the output line, this selector allows FAX sending operation to be
monitored; when switched to the input line, it allows received voices to be
monitored.
corded voice signals inputted from the microphone or handset through the
MODEM.
5
4
R 2 6 7 5 K
C 2 5 C C 2 2 1
7
R 3 0
# 1 8
4 . 7 K
I 3 2 4
M 0 V
*
4 3 K
R 6 3 1 K
1
R 2 7
# 1 8
4 . 7 K
K I 3 2 4
6
C 4 6
D 2
C C 1 0 3 B
M O V H Z S 5 C
M 0 V
2
-3
C T R L 5 1 A , 5 3 B
T X S L 1 2 C
1 1 H A F H 1 2 C
9 R N G L
C N T
1 3 1 C N T 9
1 4 5
C 0 C N T
1 2 4 3
C 1
0 # 1 7 3 C 4
# 1 7 5
4 0 5 3 1
4 0 5 3 0 # 1 9
R 7 5 4 0 5 3
3
-2
1 . 5 K
5 5 D H F R L
R 3 2
1 0 0 K
1 5 C R N G O
: 1 5 B V O L 1
-1
1 5 E V O L 2
:
-2
1 5 C V O L 3
:
-3
1 2 D S P O N
+ 5 V + 2 6 v
1 6 4
# 1 7 # 1 8
C 5 6 C 2 4
C C 1 0 4 5 0 V
4 0 5 3 K I 3 2 4
C 1 1
C C 1 0 4
6 7 8 1 1 3 5 V 1 0
M 0 V M 0 V
5
III – 24
6 7
5
# 1 5
T C 3 5 1 3 3 F
R 6 5
5 6 K
R 2 9 5 6 K
6
3 6 D M K
- T X O U T D P D M C K
7 D M T
D P D M D T
5
C 4 9
+ 9 A M K
C C 1 0 2 B A P D M C K
1 0 A M T
A P D M D T
A R E F
1 1 C 3
C 3
1 2 C 4
A R E F C 4
1 3 C 5
C 5
5 M U T
M U T E
8
- P D R S T L
+ 5 V
1
V D D
C 4 5
C C 1 0 4
1 5
R X I N A
C 4 7
R 6 2
C 4 4
C C 1 0 4
1 0 0 K
C C 2 2 1
1 6 4
R X I N B V S S
2 1 4
V B I A S V S S
C 9
C 4 8
M O V
1 6 V 1 0
C C 1 0 4
A R E F
+ 9 V
C 1 1 1
C C 1 0 4
8
G N D
# 2
N J M 3 8 6 M
1 5 C
6
C 2
2 7
1 0 V 1 0 0
-
C 2 8
5
C C 1 0 5 ( 2 1 2 5 C H I P )
3
1
+
8
4
R 1 1 5
R 3 5 C 9 2
1 2 K 3 3 K
C C 1 0 3 B
R 8 9
3 . 3 K
R 3 6 R 3 4
1 K 3 0 0
M 0 V G N D
D 1 0
:
1 S S 1 2 0
Q 5 K R C 1 0 7 S
R 1 3 4
1 K
C 1 1 3
1 6 V 1 0 ( 5 m m )
M 0 V
G N D
6 7
8
A
T B U S 1 4 D
1 4 A
B
C
9
D
S P
1
2
G N D
P 4
B 2 B - P H
W H I T E
E
F
8