Sony CFMS-1 Service manual

CFM-S1

SERVICE MANUAL

Ver 1.0 2001.02

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/

type (1)

• Outputs Earphones jack

For 8 Ωimpedance earphones

inches) dia., 6Ω, cone

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.

9-873-068-11

2001B0200-1

RADIO CASSETTE-CORDER

Sony Corporation

Audio Entertainment Group

General Engineering Dept.

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

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.

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

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

SECTION 2

)

DISASSEMBLY

• The equipment can be removed using the following procedure.

Cabinet (front) ASSY

Record/playback head (HRP101),

Set

Reel/capstan motor (M101), Belt

CFM-S1

Cabi, rear

MD ASSY

Jack board, Main board, Fine tune board

Note : Follow the disassembly procedure in the numerical order given.

2-1. CABINET (FRONT) ASSY, “CABI, REAR”

Screws + BVTP 3X14

Battery terminal board, Power board

Lid, BATT

Screws + BVTP 3X1

Cabi, rear

2-2. MD ASSY

Chassis(B)

Screws + BVTP 3X10

Cabinet(front) ASSY

Remove solder (two places)

pointer

MD ASSY

Cabi, rear

2-3. RECORD/PLAYBACK HEAD (HRP101), REEL/CAPSTAN MOTOR (M101), BELT

Lug (T), plate

Record/playback head (HRP101)

Guide, tape

Screws Tapping+B

Screws + P2X 5

MD ASSY

Belt

Reel/capstan motor (M101

Screws + PTT 2X 5

CFM-S1

2-4. JACK BOARD, MAIN BOARD, FINE TUNE BOARD

Jack board

Knob(sound)

Knob(vol)

Knob(function)

Knob(band)

Screw +BVTP 3X10

Bracket(PWB)

Chassis(A)

Main board

Claw

Screws + BVTP 3X10

Fine tune board

2-5. BATTERY TERMINAL BOARD, POWER BOARD

Screw +BVTP 3X10

Cabi, rear

Knob(FT)

Knob(tune)

Claw

Remove solder

Battery terminal board

Screws + BVTP 3X10

Power board

Cabi, rear

4Remove Solde

2-6. NOTE ON INSTALATION

)

Dress the lead wires as shown in figure.

CFM-S1

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)

Fit the pointer to the chassis(B).

Set the left side of the pointer to the convex portion (a) on the chassis(B).

Screw + BVTP 3X14

Pointer

Chassis(B)

Pointer

Chassis(B)

(a)

Chassis(B)

Bracket(P)

Pointer

Chassis(A)

Turn the knob(tune) fully counterclockwise.

6 Hold the left side of pointer, then insert the gear section of pointer to groove of chassis(A).

CFM-S1

)

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

Torque 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

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

Tape Speed Adjustment

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-S1

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

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

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.

< > : 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

CT8 : SW2 Tracking Adjustment

L8 : SW2 Tracking Adjustment

L7 : SW1 Frequency Coverage Adjustment

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

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

+ 16 hidden pages