SONY CFS 929SMK2 Service Manual

CFS-929SMK2

SERVICE MANUAL

Ver 1.0 2003.12

SPECIFICATIONS

Frequency range

FM: EA model: 87.5 - 107 MHz/

E15 model: 87.5 - 108 MHz

MW: EA model: 530 - 1,605 kHz/

E15 model: 530 - 1,611 kHz SW1: 2.3 - 7 MHz SW2: 7 - 22 MHz

IF

FM: 10.7 MHz MW/SW: 455 kHz

Antennas

FM/SW: T elescopic MW: Built-in ferrite bar

Recording system

4-track, 2-channel stereo

Frequency response

80 - 12,500 Hz

Speakers

Full range: 10 cm (4 inches) dia., 4 Ω cone type/ Tweeter: 5 cm (2 inches) dia.

Input

CD/TV LINE IN jacks (phono jacks), sensitivity 0.43 V, input impedance 47 kΩ

Output

Headphones jack (stereo minijack), for 16 - 68 Ω impedance headphones

Maximum Power output

24 W

E Model

Model Name Using Similar Mechanism CFS-929S Tape T ransport Mechanism T ype MF-W616-148

Battery life

FM Recording: Sony R20P: Approx. 6.5 hours/ Sony LR20 alkaline: Approx. 18 hours Playback: Sony R20P: Approx. 1 hour/ Sony LR20 alkaline: Approx. 3.5 hours

Power requirements

110 - 127 V/220 - 240 V AC selectable, 50/60 Hz 12 V DC, eight R20 (size D) batteries DC IN 12 V jack

Power consumption

AC 30 W

Dimensions

Approx. 679 × 263.5 × 239.5 mm (w/h/d) (26 6/8 × 10 3/8 × 9 4/9 inches) incl. projecting parts and controls, not incl. handle

Mass

Approx. 8.6 kg (18 lb 15 oz) incl. batteries

Supplied accessory

AC power cord (1)

Design and specifications are subject to change without notice.

•Abbreviation E15 : AC 220-240V area in E model EA : Saudi Arabia model

9-961-448-01

RADIO CASSETTE-CORDER

Sony Corporation

Personal Audio Company Published by Sony Engineering Corporation

1

CFS-929SMK2

GENERAL

Location of controls

CFS-929SMK2

This section is extracted from instruction manual.

DIRECTION

DIR MODE

FWD/REV indicators

Deck A

Deck B

VOLUME

OPR/BATT

FUNCTION FINE TUNING

BAND

TUNING

MIC

CD/TV LINE IN (rear)

PHONES

ISS (rear)

FM STEREO

SOUND SELECT

HIGH SPEED (ON$ OFF4)

MAXI BASS

DC IN 12 V (rear)

VOLTAGE SELECTOR (rear)

3

CFS-929SMK2

SECTION 2

DISASSEMBLY

• The equipment can be removed using the following procedure.

SET

2-1. FRONT CABINET ASSY,

REAR CABINET ASSY (Page 4)

2-2. POWER BOARD

(Page 5)

2-3. F/T AND TUNER BOARDS

(Page 5)

2-4. H/P, LED2, MAXI BASS,

VOL AND MAIN BOARDS (Page 6)

2-6. JOG AND LED1

BOARDS (Page 7)

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

2-1. FRONT CABINET ASSY, REAR CABINET ASSY

2-5. MECHANISM DECK

(Page 6)

2-7. REC SW BOARD, BELT AND MOTOR ASSY (W) (M301)

(Page 7)

4

three

screws

x

(+BVTP 3

16)

8

CNP311

7

CNP306

0

front cabinet assy

9

5

rear cabinet assy

6

CNP1

3

screw

(+BVTP 3

x

16)

1

battery case lid

three

2

(+BVTP 3

screws

x

16)

4

2-2. POWER BOARD

5

BATT (+) board

CFS-929SMK2

6

two

screws

(+BVTP 3

2

shield plate (T)

1

two

screws

(+BVTP 3

x

10)

2-3. F/T AND TUNER BOARDS

4

RETAINER board

3

screw

(+BVTP 3

x

10)

7

three

(+BVTP 3

screws

x

10)

2

CNP307

8

three

(+BVTP 3

screws

x

10)

7

chassis (TUNE)

9

POWER board

rear cabinet assy

6

screw

(+BVTP 3

claw

x

10)

3

two

screws

(+BVTP 3

4

F/T board

qs

knob (BAND)

1

knob (FT)

x

10)

8

three

(+BVTP 3

screws

0

screw

(+P 2.6

qa

x

10)

x

4)

gear (VC)

9

TUNER board

5

two

screws

(+BVTP 3

x

10)

5

CFS-929SMK2

)

2-4. H/P, LED2, MAXI BASS, VOL AND MAIN BOARDS

9

screw

(+BVTP 3

qf

(+BVTP 3

10)

two claws

qj

two claws

8

knob (VOL)

qa

H/P board

0

RETAINER board

qs

screw

(+BVTP 3

qd

LED2 board

wg

CNP308

fiber washer

VOL board

x

screw

wf

CNP417

x

10)

x

12)

screw

qg

(+BVTP 3

ql

w;

MAIN board

wa

RETAINER board

1

CNP310

x

10)

2

3

CNP303

fiber washer

CNP309

5

CNP301

4

CNP302

6

CNP304

7

CNP305

qh

screw

(+BVTP 3

x

12)

qk

two claws

2-5. MECHANISM DECK

ws

wd

button (M.B)

MAXI BASS board

3

three

(+BVTP 3

screws

x

4

(+BVTP 3

10)

three

screws

x

10)

5

two

(+BVTP 3

screws

x

10

6

mechanism deck

2

1

6

2-6. JOG AND LED1 BOARDS

d

3

JOG board

2

two

screws

(+BVTP 3

x

10)

6

window (LED)

4

(+BVTP 3

5

LED1 board

two

CFS-929SMK2

screws

x

10)

1

jog dial

2-7. REC SW BOARD, BELT AND MOTOR ASSY (W) (M301)

deck A

qa

belt

8

4

shield plate (MD)

chassis (joint)

9

three motor

screws

deck B

2

REC SW boar

3

screw

(+PTT 2

x

3)

6

5

three

(+PTT 2

screws

bracket

x

5)

0

motor assy (M301)

7

two

screws

(+PTT 2

x

1

screw

(+PTT 2

5)

qs

belt

x

6)

7

CFS-929SMK2

pointer

2

knob (TUN) assy

SECTION 3

DIAL POINTER SETTING

3

midway gear

knob (TUN) assy

midway gear

4

screw

(+BVTP 3

x

1

10)

pointer

UP

5

screw

8

F/T board

3

9

two

screws

(+BVTP 3

x

10)

2

7

screw

(+BVTP 3

x

10)

(+BVTP 3

1

4

TUNER board

x

gear (VC)

6

(+BVTP 3

10)

screw

x

10)

8

SECTION 4

PHONES jack (J301)

set

32

Ω

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

digital frequency counter

MECHANICAL ADJUSTMENTS

CFS-929SMK2

SECTION 5

ELECTRICAL ADJUSTMENTS

PRECAUTION

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

record/playback head pinch roller erase head rubber belts capstan idlers

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 supply voltage unless otherwise noted.

6. Power supply voltage: 12 V dc.

Torque Measurement DECK A DECK B

Mode Torque meter Meter reading

2.21 to 5.39 mN • m

Forward CQ-102C 22.5 to 55 g • cm

(0.31 to 0.76 oz • inch)

Forward back tension

Fast Forward 5.89 to 11.76 mN • m and CQ-201B 60 to 120 g • cm Rewind (0.83 to 1.67 oz • inch)

Tape Tension Measurement DECK A DECK B

Mode Tension meter Meter reading

Forward CQ-403A

CQ-102C 2 to 5 g • cm

0.20 to 0.49 mN • m

(0.03 to 0.07 oz • inch)

more than 150 g

(more than 5.29 oz)

TAPE SECTION 0 dB = 0.775 V

Standard Output Level

Output terminal SP OUT PHONES OUT

load impedance 4 Ω 32 Ω

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

Test T ape

Tape Signal Used for

WS-48A 3 kHz, 0 dB tape speed adjustment

Tape Speed Adjustment DECK A DECK B

Procedure:

• Perform normal speed adjustment before high speed check. Mode: playback (deck A)

record (deck B)

Adjust RV301 so that reading on digital frequency counter becomes 3,000 Hz.

Specification V alue:

Deck

A Normal (playback) RV302 3,000 to 3,030 Hz A HI-SPEED DUBBING

B HI-SPEED DUBBING

Tape Adjustment Frequency

speed point counter

(playback)

(record)

(confirmation)

——— ———

5,300 to 6,300 Hz

Frequency difference between the beginning and the end of the tape should be within ± 1.0% (both Normal and Hi-speed).

Adjustment Location: – main board (component side) –

– MAIN board (component side) –

RV302

9

CFS-929SMK2

e

)

TUNER SECTION 0 dB = 1 µV

Common Setting:

SOUND SELECT control: FLAT VOLUME control: MAX MAXI BASS switch: OFF

• MW Section

BAND switch: MW FINE TUNING (RV2): mechanical center

AM RF signal generator

400Hz, 30% AM modulation Output level: as low as possible

• FM Section

BAND switch: FM

FM RF signal generator

75kHz frequency deviation by 1kHz signal Output level: as low as possible

• SW1/SW2 Section

BAND switch: SW1 or SW2 FINE TUNING (RV2): mechanical center

AM RF signal generator

400Hz, 30% AM modulation Output level: as low as possible

• Common Connecting Level Meter

set

Put the lead-wir antenna close to the set.

telescopic antenna terminal

0.01µF

telescopic antenna terminal

12pF

level meter (range: 0.5–5 V ac

32 Ω

set

MW IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T1 455 kHz

MW FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L4

CT4

516 kHz (EA model) 520 kHz (E15 model)

1,635 kHz (EA model) 1,680 kHz (E15 model)

MW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3 600 kHz

CT3 1,400 kHz

FM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

L9 10.7 MHz

FM FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L2

CT2

87.35 MHz (EA model)

86.5 MHz (E15 model)

107.8 MHz (EA model)

109.5 MHz (E15 model)

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L1

CT1

87.35 MHz (EA model)

86.5 MHz (E15 model)

107.8 MHz (EA model)

109.5 MHz (E15 model)

SW1 FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L6 2.2 MHz

CT6 7.3 MHz

SW1 TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L5 2.2 MHz

< confirmation > 7.3 MHz

SW2 FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L8 6.8 MHz

CT8 22.5 MHz

PHONES jack (J301)

•Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.

10

SW2 TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L7 6.8 MHz

< confirmation > 22.5 MHz

Adjustment Location: See page 11

FM VCO Adjustment

y

Y

Setting:

BAND switch: FM

FM RF signal generator

98MHz frequency deviation by 1kHz signal Output level: 0.1V (100dB)

CFS-929SMK2

telescopic antenna terminal

0.01µF set

digital frequenc counter

TUNER board

4

IC1 pin

7

33k

1µF

Ω

Procedure:

1. Connect the frequency counter to pins 4 and 7 of IC1 as shown the figure.

2. Tune the set to 98 MHz.

3. Adjust RV1 for 76 kHz reading on the frequency counter.

Specification Value: 75.95 to 76.05 kHz.

Adjustment Location: – tuner board (component side) –

•Abbreviation

E15 : AC 220-240V area in E model EA : Saudi Arabia model

– TUNER board (component side) –

L3

E15 model

L2

L9

FM IF

ADJUSTMENT

RV1

FM VCO

ADJUSTMENT

CT2, L2

FM FREQUENCY

COVERAGE

ADJUSTMENT

T1

MW IF

ADJUSTMENT

L9

30

1

IC1

1615

T1

CT1, L1

FM

TRACKING

ADJUSTMENT

RV1

EA model

L2

CT2

CT1

CT3

L1

CT4

CT6

L6

L8

L7

CT8

L5

L7

SW2

TRACKING

ADJUSTMENT

ANT1

FM/SW

TELESCOPIC

ANTENNA

CNP1

L4

CT6, L6 SW1 FREQUENCY COVERAGE ADJUSTMENT

CT4, L4 MW FREQUENCY COVERAGE ADJUSTMENT

CT8, L8 SW2 FREQUENC COVERAGE ADJUSTMENT

L5 SW1 TRACKING ADJUSTMENT

CT3, L3 MW TRACKING ADJUSTMENT

11

CFS-929SMK2

d

6-1. CIRCUIT BOARDS LOCATION

SECTION 6

DIAGRAMS

RETAINER2 board

VOL board

MAIN board

PIN JACK board

TUNER board

BATT (+) board

RETAINER board (not supplied)

POWER board

BATT (–) board

H/P board

RETAINER board (not supplied)

JOG board

RETAINER board (not supplied)

TRANSLATION (HEAD) board

LED2 board

LED1 board

F/T board

REC SW boar

MAXI BASS board

12

SONY CFS 929SMK2 Service Manual

TABLE OF CONTENTS

GENERAL

DISASSEMBLY

POWER board

mechanism deck

DIAL POINTER SETTING

MECHANICAL ADJUSTMENTS

ELECTRICAL ADJUSTMENTS

DIAGRAMS