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

E Model

Model Name Using Similar Machanism

NEW

Tape Transport Mechanism Type

MF-M20-117

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.

2005C02-1

© 2005.03

2

Specifications ...........................................................................  1

GENERAL
Location and Function of Controls .................................... 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

TEST MODE
3-1. Mechanical Adjustments ............................................. 6
3-2. Electrical Adjustments ................................................ 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

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

ELECTRICAL PARTS LIST ........................................ 20

! OR DOTTED LINE WITH

!ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST

PAUSE

STOP/EJECT

FF

REW

PLAY

REC

@

This section is extracted from
instruction manual.

3

1

2

Screws 
+ BVTP 3X10

Chassis(B)

MD ASSY

pointer

Cabi, rear

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

• 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

1Screws Tapping+B

4Record/playback

7

3Screws

6Screws + P2X 5

8Belt

5Lug (T), plate

2Guide, tape

4

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