SONY CFM S1MK2 Service Manual
CFM-S1MK2
SERVICE MANUAL
Ver 1.1 2003.05
E Model
Model Name Using Similar Machanism NEW
Tape Transport Mechanism Type MF-M20-117
• Frequency range
FM: Saudi Arabia: 87.6 - 107 MHz
Other models: 87.6 - 108 MHz
MW: 530 - 1 605 kHz
SW1: 2.3 - 7 MHz
SW2: 7 - 22 MHz
• Aerials FM/SW: Telescopic aerial
MW: Built-in ferrite bar aerial
• Recording system 2-track 1 channel mono
• Frequency response 80 - 8 000 Hz
• Speaker Full range: 12 cm (4 3/4 inches) dia., 6Ω, cone
type (1)
• Outputs Earphones jack
For 8 Ωimpedance earphones
SPECIFICATIONS
• Maximum power output 1.4 W
• Power requirements 110 - 120, 220 - 240 V AC
selectable, 50/60 Hz
6 V DC, 4 R20 (size D) batteries
• Power consumption AC 8 W
• Battery life
FM recording: Sony R20P: approx. 18 h
Sony alkaline LR20: approx. 50 h
Tape playback: Sony R20P: approx. 12 h
Sony alkaline LR20: approx. 30 h
• Dimensions Approx. 287 X 147 X 110 mm (w/h/d)
(11 3/8 X 5 7/8 X 4 4/8 inches) (incl. projecting parts)
• Mass (incl. batteries) Approx. 2 kg (4 lb. 7 oz)
• Supplied accessory Mains lead (1)
Design and specifications are subject to change without
notice.
9-874-212-02
2003E0200-1
© 2003.05
RADIO CASSETTE-CORDER
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
CFM-S1MK2
TABLE OF CONTENTS
Specifications ........................................................................... 1
1. GENERAL
Location and Function of Controls .................................... 2
2. DISASSEMBLY
2-1. Cabinet (Front) ASSY................................................. 3
2-2. MD ASSY................................................................... 3
2-3. Record/Playback Head (HRP101),
Reel/Capstan Motor (M101),Belt ............................... 3
2-4. Jack Board, Main Board, Fine Tune Board ................ 4
2-5. Battery Terminal Board, Power Board, ...................... 4
2-6. Note on Instalation ...................................................... 5
2-7. Dial Pointer Setting .................................................... 5
3. ADJUSTMENTS
3-1. Mechanical Adjustments............................................. 6
3-2. Electrical Adjustments ................................................ 6
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH
MARK !ON THE SCHEMATIC DIAGRAMS AND IN THE 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.
4. DIAGRAMS ...................................................................... 9
4-1. Block Diagrams ......................................................... 11
4-2. Schematic Diagrams -Main Section (1/2) - ............. 12
4-3. Schematic Diagrams -Main Section (2/2) - ............. 13
4-4. Printed Wiring Boards .............................................. 14
5. EXPLODED VIEWS
5-1. Front Cabinet Section ............................................... 16
5-2. Rear Cabinet Section ................................................ 17
5-3. Mechanism Deck Section-1(MF-M20-117) ............. 18
5-4. Mechanism Deck Section-2(MF-M20-117) ............. 19
6. ELECTRICAL PARTS LIST ........................................ 20
Location and Function of Controls
@
PAUSE
STOP/EJECT
SECTION 1
GENERAL
VOLUMEOPR/BATT
DPB
FF REW PLAY REC
BAND
This section is extracted from
instruction manual.
TUNING
FINE TUNINGFUNCTION
MIC
2
r
SECTION 2
4
)
DISASSEMBLY
• The equipment can be removed using the following procedure.
CFM-S1MK2
Record/playback head (HRP101),
Reel/capstan motor (M101), Belt
Set
Cabinet (front) assy
MD assy
JACK board, MAIN board,
FINE TUNE board
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (FRONT) ASSY
Press the STOP/EJECT button
3
4
2
Screws + BVTP 3X14
1
BATTERY TERMINAL board,
POWER board
Lid, Battery case
2
Rear assy, Cabinet
Screws + BVTP 3X1
2-2. MD ASSY
MD ASSY
Chassis(B)
1
Screws
+ BVTP 3X10
Cabinet(front) ASSY
Rear assy, cabinet
pointer
Lug
6
Remove solder (two places)
3
4
Connector
(CNP102)
Connecto
2
(CNP101)
Microphone
Claws
5
2-3. RECORD/PLAYBACK HEAD (HRP101), REEL/CAPSTAN MOTOR (M101), BELT
8
5
4
Record/playback
head (HRP101)
2
Guide, tape
1
Screws Tapping+B
Lug (T), plate
6
Screws + P2X 5
MD ASSY
Belt
Reel/capstan
7
motor (M101
3
Screws
+ PTT 2X 5
3
CFM-S1MK2
t
2-4. JACK BOARD, MAIN BOARD, FINE TUNE BOARD
JACK board
Knob(sound)
1
1
Knob(vol)
Knob(function)
1
Knob(band)
1
3
Screw +BVTP 3X10
Bracket(PWB)
Chassis(A)
9
4
MAIN board
7
Claw
Screws + BVTP 3X10
8
4
4
0
2-5. BATTERY TERMINAL BOARD, POWER BOARD
5
6
FINE TUNE board
2
Connector (CNP901)
Connector (CNP1)
Screw +BVTP 3X10
Rear assy, Cabinet
1
Knob(FT)
1
Knob(tune)
1
Claw
3
Remove solder
BATTERY TERMINAR board
5
Screws + BVTP 3X10
2
6
POWER board
Rear assy, Cabine
4Remove Solder
4
2-6. NOTE ON INSTALATION
1
Turn the knob(tune)
fully counterclockwise.
Pointer
Chassis(A)
6
6
Hold the left side of pointer,
then insert the gear section
of pointer to groove of chassis(A).
2
Fit the pointer to the
chassis(B).
5
Set the left side of the
pointer to the convex
portion (a) on the
chassis(B).
Chassis(B)
6
3
7
Bracket(P)
4
Screw + BVTP 3X14
Pointer
Chassis(B)
Pointer
(a)
Chassis(B)
Dress the lead wires as shown in figure.
CFM-S1MK2
Main board (KH102)
To jack board
To battery terminal board
To speaker
(SP1)
2-7. DIAL POINTER SETTING
MIC (ECM101)
Power board (CN901)
Main board (KH101)
Main board (KH1)
Fine tune board (KH2)
Power board (KH901)
5
CFM-S1MK2
)
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
Tor que Torque Meter Meter Reading
Forward CQ-102C
Forward
Back Tension
CQ-102C
Fast Forward CQ-201B
Rewind CQ-201B
Tape Tension Measurement
Torque Meter Meter Reading
CQ-403A
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
more than 100g
(more than 3.53 oz)
)
3-2. ELECTRICAL ADJUSTMENTS
TAPE RECORDER SECTION
FUNOTION switch : TAPE (RADIO OFF)
SOUND switch : OFF
VOLUME : MIN
Standard Output Level
Output terminal Earphone Speaker
load impedance 8Ω 6Ω
output signal level 0.25V (–10dB) 0.775V (0dB)
Test Tape
Type Signal Used for
WS-48A 3kHz, 0dB Tape Speed Adjustment
Record/Playback Head Azimuth Adjustment
Procedure :
1.Playback Mode
test tape
P-4-A100
(10kHz, -10dB)
set
8
Ω
J101 (Earphone jack
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.
Adjustment Location :
0dB=0.775V
level meter
+
Head azimuth adjustent screw
6
Tape Speed Adjustment
y
r
c
r
c
r
Procedure :
Mode : Playback
test tape
WS-48B
(3kHz, 0dB)
set
digital frequenc
counter
8Ω
+
J101 (Earphone jack)
level mete
8Ω
set
J101 (Earphone jack)
SW Section
BAND switch : SW1, SW2
FINE TUNING control : mechanical center
CFM-S1MK2
+
Adjustment Value :3,000Hz
Standard Value :2,990 to 3,010Hz
Frequency difference between the beginning and the end of the tape
should be within 1.0% (30Hz).
Adjustment Location :
tape speed adjustment
control inside motor
AM RF signal
generator
30% amplitude
modulation by 400Hz signal
output level : as low as possible
set
FM Section
Function switch : FM
Volume : MIN
FM RF signal
generator
12pF
level mete
8Ω
J101 (Earphone jack)
telescopi
antenna
terminal
+
TUNER SECTION
MW Section
Function switch : MW
Volume : MIN
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
µ
0.01 F
0dB=1µV
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
8Ω
set
J101 (Earphone jack)
telescopi
antenna
terminal
level mete
+
7
CFM-S1MK2
t
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
< > : Saudi Arabia model
AM(MW/SW) IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 455kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 520kHz <516kHz>
CT4 1,680kHz <1,630kHz>
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 600kHz
CT3 1,400kHz
SW1 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L7 2.2MHz
CT7 7.3MHz
SW1 TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L6 2.2MHz
CT6 7.3MHz
SW2 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L9 6.8MHz
CT9 22.5MHz
SW2 TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L8 6.8MHz
CT8 22.5MHz
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
L5 10.7MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 86.50MHz <87.35MHz>
CT2 109.50MHz <107.80MHz>
Adjustment Location : MAIN board (Component side)
L3: MW Tracking Adjustment
[MAIN BOARD]
(Component side)
CT3 : MW Tracking Adjustment
CT6 : SW1 Tracking Adjustment
L6 : SW1 Tracking Adjustment
CT4: MW Frequency
Coverage Adjustment
CT9 : SW2 Frequency
Coverage Adjustment
CT7 : SW1 Frequency
Coverage Adjustment
Adjust for a maximum reading on level meter.
CT8 : SW2 Tracking Adjustment
L8 : SW2 Tracking Adjustment
L7 : SW1 Frequency
Coverage Adjustment
FM TRACKING ADJUSTMENT
L1 86.50MHz <87.35MHz>
CT1 109.50MHz <107.80MHz>
L1 : FM Tracking Adjustment
CT1 : FM Tracking Adjustment
CT2 : FM Frequency
Coverage Adjustment
T1 : AM (MW/SW) IF Adjustmen
L2 : FM Frequency
Coverage Adjustment
L5 : FM IF Adjustment
L4 : MW Frequency
Coverage Adjustment
L9 : SW2 Frequency
Coverage Adjustment
8
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