Sony CFM-20L Service Manual ▷ View online
11
11
CFM-20L
z
Refer to page 13 for Notes.
z
Refer to page 14 for IC Block Diagrams.
4-3. SCHEMATIC DIAGRAM – MAIN SECTION (1/2) –
ANT1
CF2
CF1
D1
D2
C2
L5
C1
C15
T1
L1
R4
R1
C19
C20
C21
L10
0.47
µH
JW7
JW3
C16
C18
R3
L4
C7
JW4
JW5
C13
JW6
JC4
JC1
JC2
JW1
L2
JC3
C3
C11
C9
C10
C12
C5
C4
R2
C17
FM
TELESCOPIC
ANTENNA
1SS133
1SS133
10p
100p
0.047
10k
10
0.022
0.047
100p
4.7
50V
0.01
330
3p
22p
10p
47p
0.001
470p
47p
6.8p
18p
6.8k
470
6.3V
GND
+B
SIG
GND
BAND
AFC
QUAD
FM RF OUT
BAND SEL
FM OSC
DET OUT
AGC
VCC
GND
FM RF IN
RF GND
MIX OUT
FM IF IN
IF AMP,DET,FM MPX
IC1
ANTENNA
L3
FERRITE-BAR
TA2132AF
LW
FM/LW FRONT-END
LW OSC
LW RF IN
LW IF IN
FM RF
CT1
CV1
CV2
CT2
CT4
CV4
CT3
CV3
CT5
CT6
LW OSC
(2/2)
BOARD
MAIN
FREQUENCY
COVERAGE
FM
CT1,L2
TRACKING
CT2,L1
FM
TRACKING
CT5,L3
LW
FREQUENCY
COVERAGE
CT6,L4
LW
12
12
CFM-20L
4-4. SCHEMATIC DIAGRAM – MAIN SECTION (2/2) –
z
Refer to page 13 for Notes.
z
Refer to page 14 for IC Block Diagrams.
D901
D902
CNP901
HE101
M101
R108
R109
R110
R111
R114
C121
C122
C123
C119
C120
C115
C117
C101
R101
R102
C102
R103
C104
C107
C108
C109
C110
C112
C113
C111
R105
R104
C103
R106
R107
C116
CNP102
R113
CNP101
R112
C114
HRP101
SP101
J101
ECM101
J901
D102
D103
D106
C130
C131
C132
C133
C134
C135
D101
JW116
R115
JW107
JW108
C125
RV101
R118
C901
C902
F901
JW106
C105
C106
C124
R122
C136
S501
KH101
R116
R117
D104
R132
R131
R120
CNP103
R121
KH103
KH102
KH901
D107
D108
C126
Q101
JC101
C118
1N4002B
1N4002B
1k
22k
15k
1k
10
2200
16V
0.01
0.1
47
10V
4700p
0.01
1
50V
2200p
15k
22k
2.2
50V
220
22
25V
220
10V
0.01
0.01
0.47
50V
100
10V
0.1
470
16V
10
220
0.022
1k
2.2k
0.047
150
3P
470k
100p
SPRAKER
1SS133
1SS133
1SS133
0.1
470
6.3V
0.01
220
10V
10V
1000p
0.01
MTZJ3.9B
680
100p
20k
100
0.1
0.1
T630mAL
250V
1000p
1000p
0.47
50V
10k
100p
1k
4.7k
L-34HD
220
220
1k
2P
6.8k
1SS133
1SS133
4700p
KTC3198BL
REG
0.022
+B
SIG
GND
BAND
GND
TRANSFORMER
POWER
T901
MIC
N.F
NF
EQ
BIAS
BIAS
SIG
GND
LINE
OUT
POWER
GND
SIG
VCC
POWER
GND
ALC
NC
IN
MIC
IN
IN
TAPE
TAPE
POP
DEL
PRE/POWER
DRY BATTERY
SIZE"D"
(IEC DESIGNATION R20)
4PCS,6V
REC/PB
HEAD
ERASE
HEAD
REEL/CAPSTAN
MOTOR
(TAPE POWER)
REC
POWER
ON/OFF
LPF
DEL
P.VCC
P.VCC
AUX
TAPE
AUX
HEA
D IN
(+)
HEA
D IN
(-)
RIPPLE
FILTER
POWER
RIPPLE
FILTER
BTL1
BTL2
S102
IC101
MM1315BD
1
3
MIC
PB/REC
REC
/PB
MIX
ON/OFF
-1
-2
1
2
1
2
AC IN
1
2
S101
FUNCTION
TAPE/
RADIO OFF
FM
S101
FUNCTION
TAPE/
RADIO OFF
FM
VOLUME
OPR/BATT
LW
LW
AMP
BOARD
MAIN
(1/2)
13
CFM-20L
• All capacitors are in
µF unless otherwise noted. pF: µµF 50 WV or
less are not indicated except for electrolytics and tantalums.
• All resistors are in
Ω and
1
/
4
W or less unless otherwise specified.
•
f
: internal component.
• C : panel designation.
Note: The components identified by mark 0 or dotted line with
mark 0 are critical for safety.
Replace only with part number specified.
Replace only with part number specified.
• A : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 6V and fed with regulated dc power supply
• H : adjustment for repair.
• Power voltage is dc 6V and fed with regulated dc power supply
from external power voltage jack.
• Voltages are dc with respect to ground under no-signal (detuned)
conditions.
no mark : FM
(
no mark : FM
(
) : AM (RADIO SECTION), PLAY (TAPE SECTION)
<
> : MIC REC
[
] : RADIO REC
• Voltages are taken with a VOM (Input impedance 10 M
Ω).
Voltage variations may be noted due to normal production toler-
ances.
ances.
• Signal path.
F
: FM
f
: LW
E
: PB
a
: REC
N
: MIC
Note on schematic Diagram: MAIN SECTION (1/2), (2/2)
14
CFM-20L
• IC BLOCK DIAGRAMS
IC1 TA2132AF (EL)
IC101 MM1315BD
16
15
14
13
FM
OSC
FM RF
OUT
AM/FM
SW
AM RF
IN
12
11
10
9
QUAD
AFC
DET
OUT
AM
OSC
16
15
14
13
FM/AM
FM
OSC
AM
OSC
FM
OSC
FM RF
OUT
AM/FM
SW
AM RF
IN
12
11
10
9
AFC
DET
OUT
AM
OSC
AM
DET
FM
DET
FM
MIX
AM
MIX
AGC
1
2
3
4
AGC
RF
GND
MIX
OUT
FM RF
IN
5
6
7
8
GND
FM IF
IN
AM IF
IN
VCC
AM
RF
FM RF
AF
BUFF
FM
IF
AM
IF
TAPE/AUX
REC/PLAY
MIX/ECM
NC
REC
POWER ON/OFF
AUX-IN
LPF
ALC DEL
P.VCC
P.VCC
POWER GND
PBTL2
POP DEL
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
B+
B+
B+
B+
B+
B+
B+
B+
B+
B+
B+
B+
B+
B+
MIC-IN
POWER GND
POWER IN
LIN-OUT
RIPPLE
FILTER
RIPPLE
FILTER
SIG VCC
SIG-GND
BIAS
VBIAS
TAPE EQ
TAPE NF
HEAD-IN(
–
)
HEAD-IN(+)
MIC N.F
BTL1
21
22
23
24
25
26
27
28
29
30
2
3
5
4
6
7
8
9
10
1
17
18
19
20
11
12
13
14
15
16
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