CFM-S1 - Sony Audio Service Manual (repair manual)

Model
CFM-S1
Pages
23
Size
1.7 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cfm-s1.pdf
Date

View Sony CFM-S1 Service Manual online

CFM-S1
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
/
4
 inches) dia., 6
Ω, 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 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.
Ver. 1.1  2005.03
Sony Corporation
Personal Audio Group
Published by Sony Engineering Corporation
9-873-068-12
2005C02-1
© 2005.03
2
CFM-S1
TABLE OF CONTENTS
Specifications ...........................................................................  1
1.
GENERAL
Location and Function of Controls .................................... 2
2.
DISASSEMBLY
2-1. Cabinet (Front) ASSY,  “Cabi, rear” ........................... 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.
TEST MODE
3-1. Mechanical Adjustments ............................................. 6
3-2. Electrical Adjustments ................................................ 6
6.
DIAGRAMS ...................................................................... 9
4-1. Block Diagrams ........................................................ 10
4-2. Printed Wiring Boards .............................................. 11
4-3. Schematic Diagrams  -Main Section (1/2) - ............. 12
4-4. Schematic Diagrams  -Main Section (2/2) - ............. 13
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 
!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.
TUNING
PAUSE
STOP/EJECT
FF
REW
PLAY
REC
BAND
VOLUME
OPR/BATT
MIC
FINE TUNING
FUNCTION
@
DPB
This section is extracted from
instruction manual.
Location and Function of Controls
3
CFM-S1
1
2
Screws 
+ BVTP 3X10
Chassis(B)
MD ASSY
pointer
Cabi, rear
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (FRONT) ASSY, “CABI, REAR”
2-2. MD ASSY
• The equipment can be removed using the following procedure.
Set
Cabinet (front) ASSY
Cabi, rear
Jack board, Main board,
Fine tune board
Battery terminal board, Power board
MD ASSY
Record/playback head (HRP101),
Reel/capstan motor (M101), Belt
3
1
4
Remove solder (two places)
2
Screws + BVTP 3X14
2
Screws + BVTP 3X14
Lid, BATT
Cabinet(front) ASSY
Cabi, rear
2-3. RECORD/PLAYBACK HEAD (HRP101),
       REEL/CAPSTAN MOTOR (M101), BELT
1Screws Tapping+B
MD ASSY
4Record/playback
head (HRP101)
7
Reel/capstan
motor (M101)
3Screws
 + PTT 2X 5
6Screws + P2X 5
8Belt
5Lug (T), plate
2Guide, tape
4
CFM-S1
2-4. JACK BOARD, MAIN BOARD, FINE TUNE BOARD
2-5. BATTERY TERMINAL BOARD, POWER BOARD
8
6
3
3
3
Chassis(A)
Main board
7
Screws + BVTP 3X10
2
Screw +BVTP 3X10
5
Claw
Cabi, rear
Fine tune board
1
Knob(FT)
1
Knob(band)
1
Knob(function)
1
Knob(vol)
1
Knob(sound)
4
Screw +BVTP 3X10
Jack board
1
Knob(tune)
Bracket(PWB)
6
2
 
4
Remove Solder
Cabi, rear
Power board
3
 Remove solder
Battery terminal board
5
 Screws + BVTP 3X10
1
 Claw
5
CFM-S1
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.
Turn the knob(tune)
    fully counterclockwise.
Fit the pointer to the 
chassis(B).
Set the left side of the 
pointer to the convex 
portion (a) on the 
chassis(B).
Pointer
Chassis(A)
Chassis(B)
Chassis(B)
6
6
3
6
 Hold the left side of pointer, 
    then insert the gear section 
    of pointer to groove of  chassis(A).
7Bracket(P)
Screw + BVTP 3X14
Pointer
Chassis(B)
Pointer
(a)
6
CFM-S1
  TAPE RECORDER SECTION
FUNOTION switch
: TAPE (RADIO OFF)
SOUND switch
: OFF
VOLUME
: MIN
Standard Output Level
Output terminal
Earphone
Speaker
load impedance
8
6
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
TEST MODE
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
level meter
J101 (Earphone jack)
+
7
CFM-S1
 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)
8
digital frequency
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
8
+
J101 (Earphone jack)
level meter
AM RF signal
generator
30% amplitude 
modulation by 400Hz signal
output level : as low as possible
telescopic
antenna
terminal
12pF
set
8
+
J101 (Earphone jack)
level meter
FM RF signal
generator
22.5kHz frequency deviation by 
400Hz signal.
Output level : as low as possible
telescopic
antenna
terminal
0.01  F
µ
 TUNER SECTION
 
MW Section
Function switch : MW
Volume
: MIN
set
8
+
J101 (Earphone jack)
level meter
0dB=1
µ
V
8
CFM-S1
• 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 Adjustment
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
9
9
9
CFM-S1
 • Circuit Board Location.
SECTION 4
DIAGRAMS
Battery terminal board
Jack board
Main board
Power board
Fine tune board
10
10
CFM-S1
4-1. BLOCK DIAGRAMS
• Signal path.
F
: FM
E
: PB
a
: REC

Download Sony CFM-S1 Service Manual (Repair Manual)

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