
III –
26
Main PCB Circuit Diagram 5/5
1
Connector for the microphone
2
Voice signal amplifier circuit
These are provided on the FAX1570MC/
3
Analog portion of MODEM
1030/MFC1870MC/1970MC.
+ 5 V
+ 5 V
M 0 V
4 0 5 3
# 1 1
+ 5 V
M 0 V
B A 1 0 3 5 8 F
# 1 4
6
7
8
1 6
8
4
# 1 4
B A 1 0 3 5 8 F
R 4 3
1 0 K
C 3 2
C C 1 0 4
R 5 7
1 0 0 K
T X O U T
R X I N B
V B I A S
3
1 6
2
H R E F
C 1 0
1 6 V 1 0
R 5 3
*
C 5 2
C C 1 0 4
R 5 4
1 0 0 K
C 3 3
C C 6 8 1 B
1 5
R X I N A
A P D M D T
D P D M C K
D P D M D T
A P D M C K
5
6
7
9
1 0
1 1
1 2
1 3
# 1 6
T C 3 5 1 3 3 F
C 3
C 4
C 5
M U T E
T B U S
1 4 D
V D D
V S S
V S S
- P D
8
1
4
1 4
M O V
R S T L
1 4 A
A M U T
D M K
A D M D
A M K
A A M D
C 0
C 1
C 2
-
+
C 3 7
6 8 1 B
C 2 9
C C 1 0 4
C 3 4
C C 1 0 4
+ 5 V
R 4 5
8 . 2 K
C 5 4
C C 1 0 4
-
+
# 1 4
B A 1 0 3 5 8 F
R 5 5
7 5 K
C 3 5
C C 2 2 1
R 5 6
5 6 K
R 4 7
4 . 7 K
M 0 V
R 4 8
5 6 K
C 3 6
C C 1 0 2 B
H R E F
H R E F
H R E F
T L S L
5 1 B , 5 3 B
R L 1
6
7
C 3 1
C C 1 0 4
R 4 4
8 . 2 K
M O V
R 4 6
1 0 K
R 5 8
4 . 7 K
M O V
M 0 V
C 5 5
C C 1 0 4
C 5 3
C C 2 2 1
R 6 9
1 0 0 K
R L 2
P 1 2
B 2 B - P H
R E D
4 4 D
H F R L
M I C
7
6
5
3
2
1
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
1
3
2
Содержание MFC 1870MC
Страница 1: ...FACSIMILE EQUIPMENT SERVICE MANUAL MODEL FAX1170 1270 1570MC FAX1010 1020 1030 MFC1770 1870MC 1970MC ...
Страница 4: ...CHAPTER I GENERAL DESCRIPTION ...
Страница 10: ...CHAPTER II INSTALLATION ...
Страница 11: ...CHAPTER III THEORY OF OPERATION ...
Страница 43: ...CHAPTER IV DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Страница 94: ...CHAPTER V MAINTENANCE MODE ...
Страница 101: ...V 6 Scanning Compensation Data List MFC1970MC Scanning Compensation Data List Other models ...
Страница 148: ...CHAPTER VI ERROR INDICATION AND TROUBLESHOOTING ...
Страница 191: ...D Power Supply 100 120V U S A CANADA TAIWAN ...
Страница 192: ...D Power Supply 200 240V EUROPE SOUTH AMERICA ...
Страница 193: ...D Power Supply 200 240V GULF ASIA CHINA ...
Страница 197: ......
Страница 203: ......
Страница 206: ......