Sony CFM-S1MK2 User manual

CFM-S1MK2
SERVICE MANUAL
RADIO CASSETTE-CORDER
SPECIFICATIONS
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 3/4inches) dia., 6Ω, cone
type (1)
• Outputs Earphones jack
For 8 Ωimpedance earphones
• 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 X147 X110 mm (w/h/d)
(11 3/8X5 7/8X4 4/8inches) (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.
Ver 1.1 2003.05
9-874-212-02
2003E0200-1
© 2003.05
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation

2
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
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
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.
TUNING
PAUSE STOP/EJECT FF REW PLAY REC
BAND
VOLUMEOPR/BATT
MIC
FINE TUNINGFUNCTION
@DPB
This section is extracted from
instruction manual.
Location and Function of Controls

3
CFM-S1MK2
Chassis(B)
1
4
2
Screws
+ BVTP 3X10
pointer
Lug
MD ASSY
Rear assy, cabinet
3
Connector
(CNP102)
Connecto
r
(CNP101)
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (FRONT) ASSY
2-2. MD ASSY
• The equipment can be removed using the following procedure.
Set Cabinet (front) assy JACK board, MAIN board,
FINE TUNE board
BATTERY TERMINAL board,
POWER board
MD assy
Record/playback head (HRP101),
Reel/capstan motor (M101), Belt
4
1
6
Remove solder (two places)
2
Screws + BVTP 3X14
2
Screws + BVTP 3X1
4
Lid, Battery case
Cabinet(front) ASSY
Rear assy, Cabinet
Claws
5
Press the STOP/EJECT button 3
Microphone
2-3. RECORD/PLAYBACK HEAD (HRP101),
REEL/CAPSTAN MOTOR (M101), BELT
1
Screws Tapping+B
MD ASSY
4
Record/playback
head (HRP101)
7
Reel/capstan
motor (M101
)
3
Screws
+ PTT 2X 5
6
Screws + P2X 5
8
Belt
5
Lug (T), plate
2
Guide, tape

4
CFM-S1MK2
2-4. JACK BOARD, MAIN BOARD, FINE TUNE BOARD
2-5. BATTERY TERMINAL BOARD, POWER BOARD
0
8
4
4
4
Chassis(A)
MAIN board
9
Screws + BVTP 3X10
3
Screw +BVTP 3X10
7
Claw
Rear assy, Cabinet
FINE TUNE board
1
Knob(FT)
1
Knob(band)
1
Knob(function)
1
Knob(vol)
1
Knob(sound)
6
Screw +BVTP 3X10
JACK board
1
Knob(tune)
Bracket(PWB)
5
Connector (CNP1)
2
Connector (CNP901)
6
2
4 Remove Solder
Rear assy, Cabine
t
POWER board
3 Remove solder
BATTERY TERMINAR board
5 Screws + BVTP 3X10
1 Claw

5
CFM-S1MK2
2-6. NOTE ON INSTALATION
To jack board
Power board (CN901)
Fine tune board (KH2)
Main board (KH1)
Main board (KH101)
Main board (KH102)
To battery terminal board
To speaker
(SP1)
MIC (ECM101) Power board (KH901)
2-7. DIAL POINTER SETTING
Dress the lead wires as shown in figure.
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)

6
CFM-S1MK2
TAPE RECORDER SECTION
FUNOTION switch : TAPE (RADIO OFF)
SOUND switch : OFF
VOLUME : MIN
Standard Output Level
Output terminal Earphone Speaker
load impedance 8Ω6Ω
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
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 :
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-102C
Forward
CQ-102C
Back Tension
Fast Forward CQ-201B
Rewind CQ-201B
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-403A more than 100g
(more than 3.53 oz)
0dB=0.775V
Head azimuth adjustent screw
set
test tape
P-4-A100
(10kHz, -10dB) 8
Ω
level meter
J101 (Earphone jack
)
+

7
CFM-S1MK2
SW Section
BAND switch : SW1, SW2
FINE TUNING control : mechanical center
FM Section
Function switch : FM
Volume : MIN
Tape Speed Adjustment
Procedure :
Mode : Playback
Adjustment Value :3,000Hz
Standard Value :2,990 to 3,010Hz
set
test tape
WS-48B
(3kHz, 0dB) 8Ω
digital frequenc
y
counter
J101 (Earphone jack)
+
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
Put the lead-wire
antenna close to
the set.
set
8Ω
+
J101 (Earphone jack)
level mete
r
AM RF signal
generator
30% amplitude
modulation by 400Hz signal
output level : as low as possible
telescopi
c
antenna
terminal
12pF
set
8Ω
+
J101 (Earphone jack)
level mete
r
FM RF signal
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
telescopi
c
antenna
terminal
0.01 F
µ
TUNER SECTION
MW Section
Function switch : MW
Volume : MIN
set
8Ω
+
J101 (Earphone jack)
level mete
r
0dB=1µV

8
CFM-S1MK2
•Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
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 FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 86.50MHz <87.35MHz>
CT2 109.50MHz <107.80MHz>
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 86.50MHz <87.35MHz>
CT1 109.50MHz <107.80MHz>
< > : Saudi Arabia model
[MAIN BOARD]
(Component side)
CT1 : FM Tracking Adjustment
CT3 : MW Tracking Adjustment
CT6 : SW1 Tracking Adjustment
L6 : SW1 Tracking Adjustment
L3: MW Tracking Adjustment
T1 : AM (MW/SW) IF Adjustmen
t
L5 : FM IF Adjustment
L2 : FM Frequency
Coverage Adjustment
CT4: MW Frequency
Coverage Adjustment
CT2 : FM Frequency
Coverage Adjustment
L4 : MW Frequency
Coverage Adjustment
CT7 : SW1 Frequency
Coverage Adjustment
L7 : SW1 Frequency
Coverage Adjustment
CT8 : SW2 Tracking Adjustment
L8 : SW2 Tracking Adjustment
CT9 : SW2 Frequency
Coverage Adjustment
L9 : SW2 Frequency
Coverage Adjustment
L1 : FM Tracking Adjustment
Adjustment Location : MAIN board (Component side)
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
L5 10.7MHz

9
CFM-S1MK2
• Circuit Board Location.
SECTION 4
DIAGRAMS
Battery terminal board
Jack board
Main board
Power board
Fine tune boar
d

10
CFM-S1MK2
•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.
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.
•Voltages are dc with respect to ground in playback mode.
no mark : FM
(): SW1, SW2, MW (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
E: PB
a: REC
•Abbreviation
EA : Saudi Arabia
SP : Singapore
UAE : United Arab Emirates
Note on schematic Diagram: MAIN SECTION (1/2), (2/2)
Ver 1.1 2003.05