CFM-S1MK2 - 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 ................................................. 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

ADJUSTMENTS
3-1. Mechanical Adjustments ............................................. 6
3-2. Electrical Adjustments ................................................ 6

. 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

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

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.

PAUSE

STOP/EJECT

FF

REW

PLAY

REC

@

This section is extracted from
instruction manual.

3

Chassis(B)

1

4

2

Screws 
+ BVTP 3X10

pointer

Lug

MD ASSY

Rear assy, cabinet

3

Connector
(CNP102)

Connector
(CNP101)

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

• 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 3X14

Lid, Battery case

Cabinet(front) ASSY

Rear assy, Cabinet

Claws

5

Press the STOP/EJECT button

3

Microphone

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

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, Cabinet

POWER board

3

 Remove solder

BATTERY TERMINAR board

5

 Screws + BVTP 3X10

1

 Claw