Brother FAX-270MC, Руководство по обслуживанию

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III – 32
5
R E F
4
S 0 V
R A 3 5 1 X 2
+ 2 6 V
P 1
6 0 3 3 B - 1 2 Z
S 0 V
+ 5 V
8
4
S 0 V
6 3 1
4 2 1
R E F
4
3
4
3
S 0 V
+ 2 6 V
C M L
C R 1
M Z F - 2 4 H G
o r
O U A Z - S S - 1 2 4 D
F G
2
5
+ 5 V
S 0 V
S R E F
4 2
5 3
4
3
1
2
P L S
S 0 V
+
-
2
1 4
3
S 0 V
R L 2
2 1
4 3
T E L O F F
R E F
4
5
C I
S 0 V
S 0 V
N C U S L
S 0 V
+ 2 6 V
C M L
R L 2
C I
T E L O F F
P L S
T E L R L
R L 1
T E L S L
V 1
4 - 4 P M J
T E L S L
4
3
2
S R E F
S 0 V
S 0 V
+ 5 V
C
E
B
T E L R L
1
+ 2 6 V
S 0 V
F G F G
+ 5 V
+ 5 V
R E F
R 2 4
J W
J W 9
J W 1 6
o r
B A 1 0 3 5 8
S B T 0 2 6 0 X 4
o r
F L 5 R 2 0 0 P N X 4
E C 1 0
S B T 0 2 6 0
o r
F L 5 R 2 0 0 P N
3
S B T 0 2 6 0 X 2
o r
F L 5 R 2 0 0 P N X 2
A
B
1 2 3
C
D
1 2 3 5 6
A
B
C
D
6
4
4 5
A
A
A
1 A
A
A
A
3
8
2
6
5
4
:
7
9
NCU PCB Circuit Diagram (U.S.A. versions)
1 Surge absorber
2 Line relay (CML relay)
3 Line transformer
4 Circuit related to the line transformer
5 High-impedance transformer circuit
6
Calling signal detector
7
Loop current detector
8 Dial pulse generator
9 Telephone circuit
: Reference voltage generation circuit for the operational amplifiers in 4 and 9 .
a Noise filters
7. MC: METALLIZED POLYESTER FILM CAPACITOR
6. PC: POLYESTER FILM CAPACITOR
5. CC: CERAMIC CAPACITOR
4. EC: ALUMINUM ELECTROLYTIC CAPACITOR
3. COMPONENTS IN PARENTHESES NOT TO BE MOUNTED.
2. UNLESS OTHERWISE SPECIFIED, THE VOLTAGE RESISTANCE OF CAPACITORS IS 25V OR 50V.
1. UNLESS OTHERWISE SPECIFIED, POWER CONSUMPTION OF RESISTORS IS 1/4W.
FAX-270MC/290MC/520DT/520MC/MFC370MC/390MC