Sony CFM-20 User manual

Ver 1.1 2002.10
CFM-20
SERVICE MANUAL
RADIO CASSETTE-CORDER
SPECIFICATIONS
AEP Model
UK Model
E Model
9-873-105-22
2002J0200-1
© 2002.10
Model Name Using Similar Machanism CFM-S1
Tape Transport Mechanism Type MF-M20-117
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation

2
CFM-20
TABLE OF CONTENTS
Specifications ........................................................................... 1
1. GENERAL
Location and Function of Controls .................................... 2
2. DISASSEMBLY
2-1. Cabinet (Front) Sub ASSY, Cabinet (Rear) ASSY .... 3
2-2. MD ASSY ................................................................... 3
2-3. Record/Playback Head (HRP101),
Reel/Capstan Motor (M101),Belt ............................... 4
2-4. Jack Board (AEP, UK, IT, CET, HK, SP, AR model)
Main Board ................................................................. 4
2-5. Batt (+) Board, Power Board
(AEP, UK, IT, CET, HK, SP, AR model) .................... 5
2-6. Batt (+) Board, Power Board
(C&SA, MX, TW model) ........................................... 5
3. ADJUSTMENTS
3-1. Mechanical Adjustments ............................................. 7
3-2. Electrical Adjustments ................................................ 7
4. DIAGRAMS
4-1. Block Diagrams ......................................................... 11
4-2. Printed Wiring Boards .............................................. 12
4-3. Schematic Diagrams -Main Section (1/2) - ............. 13
4-4. Schematic Diagrams -Main Section (2/2) - ............. 14
5. EXPLODED VIEWS
5-1. Front Cabinet Section ............................................... 17
5-2. Rear Cabinet Section ................................................ 18
5-3. Mechanism Deck Section-1(MF-M20-117) ............. 19
5-4. Mechanism Deck Section-2(MF-M20-117) ............. 20
6. ELECTRICAL PARTS LIST ........................................ 21
SECTION 1
GENERAL
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINE WITH
MARK !ONTHE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST
ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
This section is extracted from
instruction manual.
Location and Function of Controls
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice than the minus side of a tantalum capactior may be
damaged by heat.

3
CFM-20
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-2. MD ASSY
• The equipment can be removed using the following procedure.
Set
Cabinet (front) sub ASSY
Cabinet (rear) ASSY Jack board, Main board Batt(+) board, Power board
MD ASSY
Record/playback head (HRP101),
Reel/capstan motor (M101), Belt
3
1
2
Screws (+ BVTP 3X14)
2
Screws
(+ BVTP 3X14
)
4
Remove solder (two place)
5
CNP103
6 Cabinet (front) sub ASSY
Lid, BATT
Cabinet (rear) ASSY
White
White/red
3
4
CNP102
1
Screw (+ BVTP 3X10)
2
CNP101
5 MD ASSY
Bracket (VOL)
Cabinet (rear) ASS
Y
• Abbreviation
SP : Singapore AR :Argentina
HK : Hong Kong MX :Mexican
IT : Italian TW :Taiwan
C&SA : Central and South America
CET : East European & Russian
2-1. CABINET (FRONT) SUB ASSY, CABINET (REAR) ASSY

4
CFM-20
2-3. RECORD/PLAYBACK HEAD (HRP101), REEL/CAPSTAN MOTOR (M101), BELT
2-4. JACK BOARD (AEP, UK, IT, CET, HK, SP, AR model), MAIN BOARD
1
Screws Tapping+B
(+PTT 2X5(s))
MD ASSY
4 Record/playback
head (HRP101)
8 Reel/capstan
motor (M101)
MD ASSY M101
Belt
Flywheel ASS
Y
• Attaching belt
6 Spring, Compr
3
Screws
+ PTT 2X 5
7
Screws + P2.6X 5
9 Belt
5
Lug (T), plate
2 Guide, tape
78
6
1
2
0
4
Screw
(+ BVTP 3X10)
3
Screw
(+ BVTP 3X10)
Jack board
9 CNP901
Main board
MCabinet (rear)
knob (VOL)
knob (FUN)
Chasis
5
Screw
(+ BVTP 3X10)

5
CFM-20
2-5. BATT (+) BOARD, POWER BOARD
(AEP, UK, IT, CET, HK, SP, AR model)
2-6. BATT (+) BOARD, POWER BOARD
(C&SA, MX, TW model)
Note on attaching power cord
On attaching power cord, first,
turn it around the projection on
"Cabi, rear" as shown in the
figure and secure it with "PWB,
cord retainer".
2
4
6
8
3
Screw
(+ BVTP 3X10)
1
Claw
Power board
Cord, powe
r
Batt (+) board
PWB, Cord retainer
White
Red
57
Screws
(+ BVTP 3X10)
Remove solder
(two places)
Cabinet (rear)
1
2
4
Claw
3
Screws
(+ BVTP 3X10)
Power board
Batt (+) board
Red
White
Cabinet (rear
)

6
CFM-20
•DIAL POINTER SETTING
12
5
7
Cabinet (front) Pointer
Cabinet (front)
ECM101
Set the leads from microphone(ECM101)
as shown in the figure.
Set Pointer to "Cabinet
(front)" as shown in the
figure.
4 Set the right side edge
of Pointer to the center
of three scratched lines
on Back plate.
3
Screws
6
Turn knob (tuner) fully in the
direction of the arrow as shown
in the figure.
Cabinet (rear) ASS
Y
Cabinet (front)
(+BVTP 3X10)
Pointer
Back plate
Note : Follow the installation procedure in the numerical order given.

7
CFM-20
TAPE RECORDER SECTION
FUNOTION switch (S101) : TAPE (RADIO OFF)
VOLUME (RV101) : MIN
Standard Output Level
Output terminal Earphone Speaker
load impedance 8Ω12Ω
output signal level 0.25V (–10dB) 0.775V (0dB)
Test Tape
Type Signal Used for
WS-48A 3kHz, 0dB Tape Speed Adjustment
P-4-A063 6.3kHz Record/Playback Head
Azimuth Adjustment
Record/Playback Head Azimuth Adjustment
Procedure :
1.Playback Mode
2.Rotate the screw to adjust level meter reading to the maximum.
Note : Adjust to the maximum peak though there may be two or
three peakes
3.After the adjustment, lock the adjustment screws with suitable
locking compound.
• Abbreviation
SP : Singapore AR :Argentina
HK : Hong Kong MX :Mexican
IT : Italian TW :Taiwan
C&SA : Central and South America
CET : East European & Russian
Adjustment Location :
SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1.Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head pinch roller
erase head rubber belts
capstan
2.Demagnetize the record/playback head with a head demagnetizer.
(Do not bring the head demagnetizer close to the erase head.)
3.Do not use a magnetized screwdriver for the adjustments.
4.After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power sup
ply voltage unless otherwise noted.
Torque Measurement
Forward CQ-102AS
Forward
CQ-102AS
Back Tension
Fast Forward CQ-201WS
Rewind CQ-201WS
Tape Tension Measurement
Torque Meter Meter Reading
Torque Torque Meter Meter Reading
1.77 to 5.88 mN•m
(18 to 60 g•cm)
(0.25 to 0.83 oz•inch)
0.01 to 0.49 mN•m
(1 to 5 g•cm)
(0.014 to 0.069 oz•inch)
4.42 to 9.31 mN•m
(45 to 95 g•cm)
(0.63 to 1.31 oz•inch)
4.42 to 9.31 mN•m
(45 to 95 g•cm)
(0.63 to 1.31 oz•inch)
3-2. ELECTRICAL ADJUSTMENTS
CQ-405AS more than 60g
(more than 2.12 oz)
0dB=0.775V
Head azimuth adjustment screw
set
test tape
P-4-A063J
(6.3kHz, -10dB) Speaker output:12
Ω
Earphone jack:8 Ω
level meter
J101 (Earphone jack)AEP, UK, CET, IT, AR, HK, SP model
t
C&SA, MX, TW model t
KH102 (Speaker output)
+

8
CFM-20
FM Section
Function switch (S101) : FM
Volume : MIN
Tape Speed Adjustment
Procedure :
Mode : Playback
Adjustment Value :3,000Hz
Standard Value :2,960 to 3,040Hz
Frequency difference between the beginning and the end of the tape
should be within 1.0% (30Hz).
Adjustment Location :
TUNER SECTION
AM Section
Function switch (S101) : AM
Volume : MIN
0dB=1µV
set
test tape
WS-48B
(3kHz, 0dB)
digital frequency
counter
J101 (Earphone jack)AEP, UK, CET, IT, AR, HK, SP modelt
C&SA, MX, TW model tKH102 (Speaker output)
Speaker output:12Ω
Earphone jack:8Ω
+
tape speed adjustment
control inside motor
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
set
+
level meter
J101 (Earphone jack)AEP, UK, CET, IT, AR, HK, SP modelt
C&SA, MX, TW model tKH102 (Speaker output)
Speaker output:12Ω
Earphone jack:8Ω
set
+
level meter
J101 (Earphone jack)AEP, UK, CET, IT, AR, HK, SP modelt
C&SA, MX, TW model tKH102 (Speaker output)
Speaker output:12Ω
Earphone jack:8Ω
FM RF signal
generator
75kHz frequency deviation by
1kHz signal.
Output level : as low as possible
telescopi
c
antenna
terminal
0.01 F
µ

9
CFM-20
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 455kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 520kHz<516kHz>
CT3 1,680kHz (1780kHz) <1,630kHz>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 600kHz
CT4 1,400kHz (1500kHz)
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 87.00MHz (86.50MHz) <87.35MHz>
CT1 108.30MHz (109.50MHz) <108.25MHz>
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 87.00MHz (86.50MHz) <87.35MHz>
CT2 108.30MHz (109.50MHz) <108.25MHz>
( ) : C&SA, MX, TW model
< > : IT model
Adjustment Location : MAIN board
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
L5 10.7MHz
( ) : C&SA, MX, TW model
< > : IT model
[MAIN BOARD]
(Conductor side)
CT3 : AM Frequency Coverage Adjustment
CT4 : AM Tracking Adjustment
CT2: FM Tracking Adjustment
CT1 : FM Frequency
Coverage Adjustmen
t
[MAIN BOARD]
(Component side)
L5 : FM IF Adjustment
T1: AM IF Adjustment
L1: FM Tracking Adjustment
L3: AM Tracking Adjustment
L4 : AM Frequency
Coverage Adjustment
L2: FM Frequency
Coverage Adjustment
• Abbreviation
MX : Mexican
IT : Italian
TW : Taiwan
C&SA : Central and South America

10
CFM-20

1111
CFM-20
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAMS
• Signal path.
F: FM
f: AM
E: PB
a: REC
N: MIC
•Abbreviation
SP : Singapore
HK : Hong Kong
AR : Argentina
MX : Mexican
IT : Italian
TW : Taiwan
C&SA : Central and South America
CET : East European & Russian
ANT1
CT2
CT1 CV1
CV2
CF1
CF2
ECM101
M101
SP101
J101
F901
HRP101
HE101
RV101
T1
L5
L1
L2
J901
CT4
CT3 CV3
CV4
D903
D104
D101 D103
S501
SP101
L4
FM
TELESCOPIC
ANTENNA
SPRAKER
SPRAKER
QUAD
AM RF IN
FM RF OUT
BAND SEL
FM OSC
AM OSC
DET OUT
FM RF IN MIX OUT FM IF IN
AM IF IN
IF AMP,DET,FM MPX
RADIO
+B
REEL/CAPSTAN
MOTOR
(TAPE POWER)
MIC
S102
PB/REC
REC/PB
HEAD
ERASE
HEAD
TRANSFORMER
POWER
T901
IN
MIC
IN
PRE/POWER
AMP
POWER
ON/OFF
AUX
TAPE
AUX
HEAD IN
(+)
HEAD IN
(-)
BTL1
BTL2
REC/PB
DRY BATTERY
SIZE"D"
(IEC DESIGNATION R20)
4PCS,6V
D901,902
RECT
+B
REG
+B
VOLUME
BIAS
BIAS
LINE
OUT
IN
POWER
IC1 IC101
AC IN
AM
ANTENNA
L3
FM/AM FRONT-END
RADIO
+B
TRANSFORMER
POWER
T901
D901,902
RECT
REG
Q101
RIPPLE
FILTER
FERRITE-BAR
TRACKING
COVERAGE
FREQUENCY
MW
FM
COVERAGE
FREQUENCY
TRACKING
FM
AM IF
CT3,L4
CT4,L3
AM
CT2,L1
CT1,L2
FM DET
AC IN
OPR/BATT
+B
+B
RADIO +B
FUNCTION
TAPE/
RADIO OFF
AM
FM
FUNCTION
TAPE/
RADIO OFF
AM
FM
S101-1
S101-2
AEP,UK,CET,IT,AR,HK,SP
MX,C&SA,TW
AEP,UK,CET,IT,AR,HK,SP
AEP,UK,CET,IT,AR,HK,SP
MX,C&SA,TW
AM OSC

1212
CFM-20
JACK BOARD
POWR BOARD
POWR BOARD
BATT(+) BOARD
MAIN BOARD
1-680-974- 11
(11)
1-680-976- 11
(11)
1-680-977- 11
(11)
1-680-978- 11
(11)
1-680-979- 11
(11)
CV1
CV3
CV2
CV4
CT2
CT4
CT1
CT3
S501
(TAPE POWER)
M101
REEL/CAPSTAN
MOTOR
M
vSP101
SPEAKER
SP101
SPEAKER
(C&SA,MX,TW)
L3
AM
FERRITE-BAR
ANTENNA
ANT1
FM
TELESCOPIC ANTENNA
DRY BATTERY
SIZE "D"
(IEC DESIGNATION R20)
4PCS, 6V
(AEP,UK,CET,IT,AR,HK,SP)
T901
POWER TRANSFORMER
AC IN
(C&SA,MX,TW)
AC IN
T901
POWER TRANSFORMER
(AEP,UK,CET,IT,AR,HK,SP)
23 4 5 6 7 89 10 11
A
1
B
C
D
E
F
G
H
R118
C901
C902
J101
KH103
D901
D902
KH901
CNP901
D903
JW901
JW902
D902
D901
C901 C902
F901
J901
CNP901
KH901
JW901
JW902
JW903
R101
R102
R103
R104
R105
15
R106
R107
R108
R111
R112
10
R114 16
C101
C103
C108
C109 C113
C114
C115
30
C116
C118
C120 20
C123
C130
C105
R4
C13
R116 R117
S102
(REC/PB)
JC101
C106
R110
R115
R109
525
IC1
R121
R122
C134
C7
C2
C3
R2
JC3
IT EXCEPT
IT
C1
C122
C132
R3
C18
JC1
JC2
C19
C20
R1
C15
C9
JC4
C136
C125
C135
C102
C104
C107
C110 C111
C117
D1
D2
L2
L2
L5
JW1
JW2
JW4
JW5
JW7
JW101
JW102
JW103
JW104
JW105
JW106
JW107
JW108
JW109
JW110
JW111
JW113
C119
D104
OPR/BATT
L1
IC101
D106
C11
L4
C4
C5
CNP101
R120
CNP102
KH101
KH102
C121 R113
C112
C124
Q101
C131
R132
R131
C133
S101
CNP103
-2 -1
C16
CF1
CF2
T1
C17
C16
JW3
JW6
RV101
VOLUME
D101
D102
D103
C21
L10
B C E
S101
FUNCTION
FM
AM
TAPE/RADIO OFF
-2 -1
ECM101
MIC
HRP101
REC/PB
HEAD
HE101
ERASE
HEAD
C126
D108
D107
4-2. PRINTED WIRING BOARDS
Ref. No. Location
zSemiconductor
Location
MAIN BOARD
Note:
•X: parts extracted from the component side.
•: Pattern on the side which is seen.
•f: internal component.
• Abbreviation
SP : Singapore
HK : Hong Kong
AR : Argentina
MX : Mexican
IT : Italian
TW : Taiwan
C&SA : Central and South America
CET : East European & Russian
D1 A-4
D2 A-4
D101 B-5
D102 C-8
D103 B-7
D104 B-8
D106 B-5
D107 A-7
D108 A-8
IC1 B-3
IC101 B-7
Q101 B-5
Ref. No. Location
POWER BOARD
(AEP, UK, CET, IT, AR,
HK, SP)
D901 E-4
D902 E-4
Ref. No. Location
POWER BOARD
(C&SA,MX,TW)
D901 G-8
D902 G-8
D903 G-8

1313
CFM-20
zRefer to page 14 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
C3
L1
C4
R4
R2
R1
C19
C20
C21
L10
0.47µH
JW7
JW3
C17
C16
C18
R3
L4 C11
C7
JW4
JW5
C13
JW6
JC4
JC1
JC2
JW1
C5
C9
L2
L2
JC3
FM
TELESCOPIC
ANTENNA
1SS133 1SS133
10p
100p
0.047 10k
10
0.022
0.047
100p
100
10V
4.7
50V
0.01
330
3p
22p
0
GND
+B
SIG
GND
BAND
***
*
*
AFC
QUAD
AM RF IN
FM RF OUT
BAND SEL
FM OSC
AM OSC
DET OUT
AGC
VCC
GND
FM RF IN
RF GND
MIX OUT
FM IF IN
AM IF IN
IF AMP,DET,FM MPX
IC1
AM
ANTENNA
L3
FERRITE-BAR
TA2132AF
FM/AM FRONT-END
C&SA,AR,HK,MX,SP,TW
*C3
7p
10p
FM RF
CT1
CV1
CV2
CT2
FM OSC
C&SA,AR,HK,MX,SP,TW
*C4
15p
18p
AEP,UK,CET,IT
*R2
6.8k
4.7k
IT,C&SA,AR,HK,MX,SP,TW
AEP,UK,CET
CT4 CV4
CT3 CV3
AM OSC
*C11
3.3p
6.8p
C&SA,MX,TW
AEP,UK,CET,IT,AR,HK,SP
AM
FREQUENCY
COVERAGE
CT3,L4
TRACKING
AM
CT4,L3
TRACKING
FREQUENCY
COVERAGE
CT2,L1
FM
FM
CT1,L2
*C5
6.8p EXCEPT IT
IT 10p IT
AEP,UK,CET
15p
IT MODEL
EXCEPT
IT MODEL
(2/2)
BOARD
MAIN

1414
CFM-20
4-4. SCHEMATIC DIAGRAM – MAIN SECTION (2/2) – zRefer to page 14 for Notes. z Refer to page 14 for IC Block Diagrams.
D901
D902
CNP901
HE101
M101
R108
R109 R110
R111
R114
C121 C122
C123
C118 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
SP101
C901
C902
CNP901
D901
D902
D903
C901
C902
F901
JW106
C105
C106
C124
R122
C136
S501
KH101
R116
R117
D104
R132
R131
R120
CNP103
R121
KH103
KH102
KH901
KH901
D107 D108
C126
Q101
JC101
1N4002B
1N4002B
1k
22k 15k
1k
10
2200
16V 0.01
0.1
0.01 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
1000p
0.01
MTZJ3.9B
680
100p
20k
100
SPRAKER
0.1
0.1
1N4002B
1N4002B
1N4002B
0.01
0.01
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
+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
AMP
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
HEAD IN (+) HEAD 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
TRANSFORMER
POWER
T901
1
2
AC IN
1
2
S101
FUNCTION
TAPE/
RADIO OFF
AM
FM
S101
FUNCTION
TAPE/
RADIO OFF
AM
FM
VOLUME
AEP,UK,CET,IT,AR,HK,SP
AEP,UK,CET,IT,AR,HK,SP
OPR/BATT
MX,C&SA,TW
AEP,UK,CET,IT,AR,HK,SP
MX,C&SA,TW
AEP,UK,CET,IT,AR,HK,SP

15
CFM-20
• 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 Ωand 1/4 W or less unless otherwise specified.
•f: internal component.
•C: panel designation.
Note: The components identified by mark 0or dotted line with
mark 0are critical for safety.
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
from external power voltage jack.
• Voltages are dc with respect to ground under no-signal (detuned)
conditions.
no mark : FM
( ) : AM (RADIO SECTION), PLAY (TAPE SECTION)
< > : MIC REC
[ ] : RADIO REC
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production toler-
ances.
• Signal path.
F: FM
f: AM
E: PB
a: REC
N: MIC
•Abbreviation
SP : Singapore
HK : Hong Kong
AR : Argentina
MX : Mexican
IT : Italian
TW : Taiwan
C&SA : Central and South America
CET : East European & Russian
Note on schematic Diagram: MAIN SECTION (1/2), (2/2)

16
CFM-20
• 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
1234
AGC
RF
GND
MIX
OUT
FM RF
IN
5 678
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
2223
24
25
26
27
28
2930
235
4678910
1
17
1819
20
11 12 13 14 15
16

CFM-20
17
The components identified by mark 0
or dotted line with mark 0are critical
for safety.
Replace only with part number specified.
SECTION 5
EXPLODED VIEWS
NOTE :
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
• Color indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE) ••• (RED)
↑↑
Parts color Cabinet's color
• Items marked “ * ”are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference
number in the exploded views are not
supplied.
• Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
5-1. FRONT CABINET SECTION
• Abbreviation
SP :Singapore
HK :Hong Kong
AR :Argentina
MX :Mexican
IT :Italian
TW :Taiwan
C&SA :Central and South America
CET :East European & Russian
#2
#1
#1
#1
2
ECM101
3
5
4
1
1 X-3380-636-1 LID, CSSETTE SUB ASSY...(BLACK)
(C&SA,SP,MX,AR,TW)
1 X-3380-637-1 LID, CSSETTE SUB ASSY...(SILVER)
(AEP,UK,IT,CET,HK)
2 X-3380-915-1 CABINET (FRONT) SUB ASSY
(INCLUDING SP101)...(BLACK)(C&SA,MX,TW)
2 X-3380-916-1 CABINET (FRONT) SUB ASSY
(INCLUDING SP101)...(SILVER)(AEP,UK,CET)
2 X-3380-917-1 CABINET (FRONT) SUB ASSY
(INCLUDING SP101)...(BLACK)(AR,SP)
2 X-3380-918-1 CABINET (FRONT) SUB ASSY
(INCLUDING SP101)...(SILVER)(IT)
2 X-3380-919-1 CABINET (FRONT) SUB ASSY
(INCLUDING SP101)...(SILVER)(HK)
3 3-226-062-01 SPRING (CAS)
4 3-922-112-21 DAMPER
5 3-226-026-01 LID, BATT...(BLACK)(C&SA,MX,TW)
5 3-226-026-11 LID, BATT...(BLACK)(AR,SP)
5 3-226-026-31 LID, BATT...(SILVER)(AEP,UK,IT,CET,HK)
ECM101 1-542-118-11 MICROPHONE, ELECTRET CONDENSER

18
CFM-20
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
5-2. REAR CABINET SECTION
51 3-226-023-01 KNOB (TUNER)...(BLACK)(C&SA,MX,AR,SP,TW)
51 3-226-023-21 KNOB (TUNER)...(SILVER)(AEP,UK,IT,CET,HK)
*52 A-3021-411-A MAIN BOARD, COMPLETE (C&SA,MX,TW)
*52 A-3021-413-A MAIN BOARD, COMPLETE (AEP,UK,CET)
*52 A-3021-414-A MAIN BOARD, COMPLETE (IT)
*52 A-3021-494-A MAIN BOARD, COMPLETE (AR,HK,SP)
53 3-226-052-11 BUTTON (PAUSE)...(BLACK)
(C&SA,MX,AR,SP,TW)
53 3-226-052-21 BUTTON (PAUSE)...(SILVER)
(AEP,UK,IT,CET,HK)
54 3-226-051-11 BUTTON (STOP)...(BLACK)
(C&SA,MX,AR,SP,TW)
54 3-226-051-21 BUTTON (STOP)...(SILVER)(AEP,UK,IT,CET,HK)
55 3-226-050-11 BUTTON (FF)...(BLACK)(C&SA,MX,AR,SP,TW)
55 3-226-050-21 BUTTON (FF)...(SILVER)(AEP,UK,IT,CET,HK)
56 3-226-049-11 BUTTON (REW)...(BLACK)(C&SA,MX,AR,SP,TW)
56 3-226-049-21 BUTTON (REW)...(SILVER)(AEP,UK,IT,CET,HK)
57 3-226-048-11 BUTTON (PLAY)...(BLACK)
(C&SA,MX,AR,SP,TW)
57 3-226-048-21 BUTTON (PLAY)...(SILVER)(AEP,UK,IT,CET,HK)
58 3-226-047-11 BUTTON (REC)...(BLACK)(C&SA,MX,AR,SP,TW)
58 3-226-047-21 BUTTON (REC)...(SILVER)(AEP,UK,IT,CET,HK)
59 3-223-488-01 MARKER (REC)
60 1-680-978-11 JACK BOARD (AEP,UK,IT,CET,HK,SP,AR)
The components identified by mark 0
or dotted line with mark 0are critical
for safety.
Replace only with part number specified.
61 3-226-018-01 BRACKET (PWB)
62 1-680-977-11 BATT (+) BOARD
63 3-226-027-01 HANDLE...(BLACK)(C&SA,MX,AR,SP,TW)
63 3-226-027-21 HANDLE...(SILVER)(AEP,UK,IT,CET,HK)
64 3-226-054-11 KNOB (VOL)...(BLACK)(C&SA,MX,AR,SP,TW)
64 3-226-054-21 KNOB (VOL)...(SILVER)(AEP,UK,IT,CET,HK)
65 3-226-025-01 KNOB (FUN)...(BLACK)(C&SA,MX,AR,SP,TW)
65 3-226-025-21 KNOB (FUN)...(SILVER)(AEP,UK,IT,CET,HK)
66 3-226-065-01 TERMINAL, BATT (+-)
67 3-226-064-01 TERMINAL, BATT (-)
068 1-757-642-11 CORD, POWER (C&SA,MX,TW)
69 3-226-016-11 CABINET (REAR)...(BLACK) (TW)
69 3-226-016-31 CABINET (REAR)...(BLACK) (E92)
69 3-226-016-41 CABINET (REAR)...(BLACK) (MX)
69 3-226-016-51 CABINET (REAR)...(BLACK) (AR,SP)
69 3-228-555-01 CABINET (REAR)...(SILVER) (AEP,IT,UK)
69 3-228-555-11 CABINET (REAR)...(SILVER) (CET,HK)
70 3-226-031-01 TERMINAL, ANT
71 3-226-022-01 GEAR (VC)
73 1-680-979-11 POWER BOARD (AEP,UK,IT,CET,HK,SP,AR)
ANT1 1-754-160-11 ANTENNA, TELESCOPIC
#2 7-685-647-79 SCREW +BVTP 3X10 TYPE2 N-S
#3 7-682-148-13 SCREW +P 3X8
not supplied
not supplied C&SA, MX, TW
C&SA, MX, TW
ANT1
AEP, UK, IT, CET
HK, SP, AR
not
supplied
not
supplied
#2
#2
#2
#3
#2
#2
#2
#2
#4
#2
53
52
51
62
5455
56
57
58
59
60
61
63
64
65
66
67
69
71
70
73
68
C&SA, MX, TW
Ver 1.1 2002.10

CFM-20
19
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
5-3. MECHANISM DECK SECTION-1
(MF-M20-117)
101 3-933-010-01 SPRING (S/P), TORSION
102 3-933-025-01 SPRING (P), TORSION
103 3-040-857-01 LEVER (P)
104 3-934-024-01 ROLLER, PINCH
105 3-933-019-01 SPRING (F/R), TORSION
106 3-933-028-01 SPRING (FWD), TORSION
107 3-933-016-01 GEAR (S REEL)
*108 3-933-023-11 SLIDER (REC)
109 3-933-022-01 BASE, HEAD
*110 3-933-017-11 SLIDER (REW)
*111 3-933-018-11 SLIDER (FF)
*112 3-933-009-11 SLIDER (STOP)
*113 3-933-008-11 SLIDER (PAUSE)
114 3-933-004-01 CLAW, REEL
*115 3-933-021-01 SLIDER (FRP)
*116 3-933-006-01 SLIDER (EJECT)
117 3-934-833-01 SPRING (FRP)
118 3-022-794-02 SPRING (BT)
119 3-933-007-01 PLATE, LOCK
*120 3-009-076-01 CHASSIS (HEAD)
121 3-010-625-01 GUIDE, TAPE
122 3-342-917-01 SCREW (IT3-C), TAPPING, + B
123 3-936-265-01 LUG (T), PLATE
124 4-936-201-01 SPRING, COMPRESSION
HE101 1-500-680-11 HEAD, MAGNETIC (ERASE)
HRP101 1-500-679-11 HEAD,MAGNETIC(RECORD/PLAYBACK)
HE101
HRP101
101
102
103
104
105
106
107
108
112
110
111
123
109
124
120
121
122
113
114
115
116
117
118
119
#5
#5

20
CFM-20
5-4. MECHANISM DECK SECTION-2
(MF-M20-117)
151 3-933-029-01 LEVER, ERASING PREVENTION
152 3-933-182-01 SPRING, CASSETTE
153 3-932-995-01 GEAR (MID)
154 X-3371-667-1 CLUTCH ASSY
155 3-932-997-01 GEAR (CAM)
*156 3-932-999-01 SLIDER (SW)
157 3-932-998-01 SPRING (GROUND), TORSION
158 3-009-648-01 LEVER (S.OFF)
159 3-009-650-02 SPRING (K), COMPRESSION
160 X-3373-572-1 REEL ASSY (N), T
161 3-933-020-01 BELT
162 X-3377-877-2 FLYWHEEL ASSY
163 3-932-993-01 CHASSIS, OUTSERT
164 3-343-358-01 RING, RETAINING
165 3-223-156-01 SPRING (CAM), COMPRESSION
166 3-934-336-01 BEARING
167 3-939-383-02 SPRING, COMPRESSION
168 3-936-438-01 LEVER (K)
M101 A-3052-373-A MOTOR ASSY (REEL/CAPSTAN)
(INCLUDING PULLEY)
S501 1-762-679-11 SWITCH, LEAF (TAPE POWER)
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
M101
S501
151
152
153
154
155
156
157
158
159
160
168
161
162
163
164
165
166
167
#4