Sony SERVICE MANUAL Service Manual

Ver. 1.0 1998.07

MICROFILM

CFS-515L

SERVICE MANUAL

RADIO CASSETTE-CORDER

SPECIFICATIONS

East European Model

Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MF-W495-117

Frequency range FM : 65 – 108MHz

MW : 531 – 1,602kHz
LW : 153 – 279kHz
SW : 5.95 – 18MHz

IF FM : 10.7MHz

MW/LW/SW : 455kHz

Aerials FM/SW : Telescope

MW/LW : Built-in ferrite bar
Recording system 4-track, 2-channel stereo
Frequency response 70 – 13,000Hz
Speakers Full range : 10cm (4 inches) dia., 6ohms,

cone type/Tweeter : 2cm (13/16 inches) dia.
Output Headphones jack (stereo minijack), for

16 – 68 ohms impedance headphones
Maximum Power output

5W+5W
Battery life FM Recording : Sony R20P : Approx. 10hours/

Sony LR20 alkaline : Approx. 20hours

Playback : Sony R20P : Approx. 3.5hours/

Sony LR20 alkaline : Approx. 8hours
Power requirements 230V AC, 50Hz

9V DC, six R20 (size D) batteries
Power consumption AC 18 W
Dimensions Approx. 697 x 211 x 201.5 mm (w/h/d)

(27 1/2 x 8 3/8 x 8 inches) incl. projecting parts and

controls, not incl. handle
Mass Approx. 6.2 kg (13 lb 10 oz) incl. batteries
Supplied accessories

AC power cord (1)

Design and specifications are subject to change without notice.

– 2 –

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

1. GENERAL

Looking at the Controls ..................................................... 3

2. DISASSEMBLY

2-1. Cabinet (Front) Section,

Cabinet (Rear) Section ................................................ 4

2-2. BATT (–) Board, BATT (+) Board ............................. 4

2-3. Power (AC) Board, Power (DC) Board...................... 4

2-4. Mechanism Deck, REC SW Board............................. 5

2-5. Chassis Sub Assy, Belt................................................ 5

2-6. VOL Board, Main Board, ECM Board....................... 6

2-7. Tuner Board ................................................................ 6

3. DIAL POINTER INSTALLATION ............................7

4. ADJUSTMENTS

4-1. Mechanical Adjustments ............................................ 8

4-2. Electrical Adjustments................................................ 8

5. DIAGRAMS

5-1. Block Diagram...........................................................11

5-2. Printed Wiring Boards – Main Section –.................. 14

5-3. Schematic Diagram – Main Section – ...................... 17

5-4. Printed Wiring Boards – Tuner Section –................. 20

5-5. Schematic Diagram – Tuner Section – ..................... 21

6. EXPLODED VIEWS

6-1. Cabinet (Rear) Section.............................................. 25

6-2. Cabinet (Front) Section ............................................ 26

6-3. Mechanism Deck Section -1..................................... 27

6-4. Mechanism Deck Section -2..................................... 28

6-5. Speaker Section ........................................................ 29

7. ELECTRICAL PARTS LIST.................................... 30

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.

TABLE OF CONTENTS

• HOW TO CHANGED THE CERAMIC FILTERS

This model is used two ceramic filters of CF1 and CF2.
You must used same type of color marked ceramic filters in
order to meet same specifications.
Therefore, the ceramic filter must changed two pieces together
since it’s supply two pieces in one package as a spare parts.

Mark Center fequency

red

blue

orange

10.70MHz

10.67MHz

10.73MHz

mark

CF1, 2

– 3 –

SECTION 1

GENERAL

LOOKING AT THE CONTROLS

FRONT PANEL

REAR PANEL

5

67

1

2

3

4

!£

!¡89!º

!™

5

67

1234

1Cassette compartments
2 MIC (microphone)
3 PHONES (headphones) jack (stereo mini-jack)
4 VOLUME control
5 OPR/BATT (operation/battery) indicators
6 FUNCTION selector

RADIO
DUBBING HIGH
DUBBING NORM
TAPE/RADIO OFF

7 BALANCE control
8 5 BAND GRAPHIC EQUALIZER controls

9 PRESET MODE selector
!º BAND selector
!¡ TUNING control
!™ FINE TUNING control
!£ Tape operating buttons

r REC (record) button : Deck B only
( PLAY (playback) button
0 REW (rewind) button
) FF (fast-forward) button
p6 STOP/EJECT button
P PAUSE button

1 LOCK tab (right side)
2 FM MODE switch
3 Telescopic aerial
4 SPEAKER terminals
5 LOCK tab (Left side)
6 ⁄ AC IN (AC power input) socket
7 Battery compartment

– 4 –

SECTION 2

DISASSEMBLY

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

2-1. CABINET (FRONT) SECTION, CABINET (REAR) SECTION

2-2. BATT (–) BOARD, BATT (+) BOARD

r

The equipment can be removed using the following procedure.

Cabinet (Front) section

BATT (–) board, BATT (+) board

Cabinet (Rear) section

Set

Power (AC) board, Power (DC) board
Mechanism deck, REC SW board Chassis sub assy, Belt

VOL board, Main board ECM board
Tuner board

2-3. POWER (AC) BOARD, POWER (DC) BOARD

Cabinet (Rear) section

Bracket (AC)

5

Screws (+BTP 3x10)

3

Screws

(+BTP 3x10)

1

Screw

(+BTP 3x10)

2

4

6

Power (AC) board

Shield plate (T)

Power (DC) board

3

Screws

(+BTP 3x10)

Cabinet (Rear) section

1

Screws (+BTP 3x10)

3

4

2

BATT (+) board

BATT (–) board

Cabinet (Rear) section

1

Screws

(+BTP 3x14)

2

Cabinet (Front) section

– 5 –

2-4. MECHANISM DECK, REC SW BOARD

2-5. CHASSIS SUB ASSY, BELT

2

Screw (+PTT 2x5)

1

3

Deck B

2

Screws (+PTT 2x5)

4

Belt

4

Belt

2

Screws (+PTT 2x5)

Deck A

Flywheel ass

y

Chassis sub assy

Flywheel assy

3

Screws

(+BTP 3x10)

3

Screws

(+BTP 3x10)

5

Screw

(+PTT 2x6)

6

4

1

2

1

Button (ST/EJ)

Cassette lid (L)

REC SW board

Cassette lid (R)

Mechanism deck section

Button (ST/EJ)

Cabinet (Front) section

2

– 6 –

2-6. VOL BOARD, MAIN BOARD, ECM BOARD

2-7. TUNER BOARD

5

3

6

4

Screws (+BVTP 3x10)

1

Screw (+BTP 3x10)

1

Screw (+BTP 3x10

)

2

Knob (F/T)

Chassis (Tune)

Tuner board

Tuner board

Claw

7

1

3

3

4

8

5

Screw (+BTP 3x10)

6

Screw (+BVTP 3x6)

2

Screw

(+BTP 3x10)

Knob (VOL)

VOL board

Main board

ECM board

– 7 –

SECTION 3

DIAL POINTER INSTALLATION

Cabinet (Front)

Cabinet (Front)

Knob (Tune)

1

Pointer

a

c

b

Pointer

Marked line

2

– 1

2

– 2

6

Screw (+BTP 3x10

)

6

Screw (+BTP 3x10)

5

Screws (+BVTP 3x10)

Cabinet (Front)

4

Gear (Midway)

3

Gear (VC)

Chassis (Tune)

Tuner board

1 Set the pointer into the grooves of the cabinet

(Front) in the order of a, b and c.

2 Turn the knob (Tune) in the direction of the arrow,

then set the pointer by aligning it with the marked
line of the cabinet (Front).

3 Turn the gear (VC) fully counterclockwise.
4 Turn the gear (Midway) fully clockwise.
5 Mount the tuner board to the chassis and tighten

with screws.

6 Mount the chassis (Tune) to the cabinet (Front) and

tighten with screws.

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

– 8 –

SECTION 4

ADJUSTMENTS

4-1. MECHANICAL ADJUSTMENTS

PRECAUTION

1. Clean the following parts with a denatured-alcohol-moistened
swab :

record/playback head playback head
pinch roller erase head
rubber belt 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 adjustments.

4. After the adjustments, apply suitable locking compound to the
parts adjusted.

5. The adjustments should be performed with the rated power sup­ply voltage unless otherwise noted.

Torque Measurement

Torque Torque Meter Meter Reading

Playback CQ-102C

18 – 60 g • cm

(0.25 – 0.83 oz• inch)

Back Tension CQ-102C

1 – 5 g • cm

(0.014 – 0.069 oz• inch)

Rewind

CQ-201B

45 – 95 g • cm

Fast Forward (0.63 – 1.31 oz• inch)

Tape T ension Measurement

Mode Tension Meter Meter Reading

FWD CQ-403A more than 60g (2.12 oz)

4-2. ELECTRICAL ADJUSTMENTS

TAPE SECTION

1. The adjustments should be performed in the order give in the
service manual. (As a general rule, playbak circuit adjustment
should be completed before performing recording circuit adjust­ment.)

2. The adjustments should be performed for both L-CH and R-CH
unless otherwise indicated.

• Switch location

FUNCTION switch • • • • • • • • • • • • • • • • • TAPE (RADIO OFF)
PRESET MODE • • • • • • • • • • • • • • • • • • • • • MANUAL
GRAPHIC EQUALIZER • • • • • • • • center click
BALANCE • • • • • • • • • • • • • • • • • • • • • • • • • • • • • center click
VOLUME• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • MAX
MEGA BASS • • • • • • • • • • • • • • • • • • • • • • • • • mechanical center

Standard Output Level

Output terminal PHONES SP (FRONT) OUT

Load impedance 32Ω 6Ω

Output signal level 0.25V (–10dB) 0.775V (0dB)

Test T ape

Type Signal Used for

WS-48A 3kHz, 0dB Tape Speed Adjustment

0dB=0.775V

Tape Speed Adjustment

Procedure :

Mode : Playback

(Normal speed)

1. Deck A to playback mode.

2. Adjust the RV303 for 2,985 – 3,015Hz reading on digital fre­quency counter.

3. Frequency difference between the beginning and the end of the
tape should be within 1% (30Hz).

(High speed)

4. Deck B to record mode.

5. Deck A to high speed playback mode.

6. Confirm that the reading of the digital voltmeter becomes 5,500
– 6,500Hz.

7. Frequency difference between the beginning and the end of the
tape should be within 1% (30Hz).

Adjustment Location :

set

test tape
WS-48A
(3kHz, 0dB)

32

Ω

digital frequency

counter

phones jack

IC201

RV303 : Tape Speed Adjustment

[ MAIN BOARD ]

(Component side)