Sony WXC-570-R Service manual

WX-C570R

SERVICE MANUAL

Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation.

CD Section

TC Section

AEP Model

UK Model

Model Name Using Similar Mechanism CDX-3180 CD Drive Mechanism Type MG-363X-121 Optical Pick-up Name KSS-521A Model Name Using Similar Mechanism XR-2800 Tape Transport Mechanism Type MG-25E-136

CD player section

Signal-to-noise ratio 96 dB Frequency response 10 - 20,000 Hz Wow and flutter Below measurable limit

Cassette player section

Tape track 4-track 2-channel stereo Wow and flutter 0.08 % (WRMS) Frequency response 30 - 18,000 Hz Signal-to-noise ratio

Cassette type Dolby B NR Dolby NR off

TYPE II, IV 67 dB 58 dB TYPE I 64 dB 55 dB

T uner section

Tuning range 87.5 - 108.0 MHz Antenna terminal External antenna connector Intermediate frequency 10.7 MHz Usable sensitivity 9 dBf Selectivity 75 dB at 400 kHz Signal-to-noise ratio 65 dB (stereo),

Harmonic distortion at 1 kHz

Separation 35 dB at 1 kHz Frequency response 30 - 15,000 Hz

68 dB (mono)

0.7% (stereo),

0.4% (mono)

SPECIFICATIONS

MW/LW

Tuning range MW : 531 - 1,602 kHz

LW : 153 - 281 kHz Antenna terminal External antenna connector Intermediate frequency 10.71 MHz/450 kHz Sensitivity MW: 30 µV

LW : 50 µV

Power amplifier section

Outputs Speaker outputs

(sure seal connectors) Speaker impedance 4 - 8 ohms Maximum power output 35 W × 4 (at 4 ohms)

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MICROFILM

CHANGER CONTROL AUDIO MASTER

– 1 –

General

Outputs Line outputs (2)

Power antenna relay control lead Power amplifier control lead Telephone ATT control lead

Tone controls Bass ± 10 dB at 100 Hz

Treble ± 10 dB at 10 kHz

Power requirements 12 V DC car battery

(negative ground)

Dimensions Approx. 178 × 100 × 173 mm

(w/h/d)

Mounting dimension Approx. 178 × 100 × 155 mm

(w/h/d) Mass Approx. 2.2 kg Supplied accessories Parts for installation and

connections (1 set)

Decoy cover (1)

Labels for optional rotary

commander (2)

Design and specifications are subject to change without notice.

SERVICE NOTE

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Notes on Chip Component Replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

NOTES ON PICK-UP FLEXIBLE BOARD

The pick-up flexible board in this set is secured to the optical pickup with an adhesive tape. Once the tape is removed, an adhering force becomes weak, and it cannot be reused. Therefore, if the optical pick-up is replaced, replace also the pickup flexible board with a new one.

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 PAR TS WHOSE P ART NUMBERS APPEAR AS SHOWN IN THIS MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.

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TABLE OF CONTENTS

1. GENERAL

Location of Controls............................................................... 4

Getting Started........................................................................ 5

Setting the Clock .................................................................... 5

CD Player ............................................................................... 5

Cassette Player ....................................................................... 6

Radio ...................................................................................... 7

RDS ........................................................................................ 8

Other Functions .................................................................... 11

CD/MD Changer .................................................................. 12

Connections .......................................................................... 15

2. DISASSEMBLY

2-1. Front Panel Assy .............................................................. 17

2-2. Key Board ........................................................................ 17

2-3. CD Mechanism Block ...................................................... 18

2-4. Heat Sink .......................................................................... 18

2-5. CD Board ......................................................................... 19

2-6. Tape Mechanism Block .................................................... 19

2-7. Main Board ...................................................................... 20

2-8. Chassis (T) Sub Assy ....................................................... 20

2-9. Lever Assy ........................................................................ 21

2-10. Servo Board...................................................................... 21

2-11. Roller Assy ....................................................................... 22

2-12. Chassis (OP) (O/S) Assy .................................................. 22

2-13. Optical Pick-up Block ...................................................... 23

3. ASSEMBLY OF MECHANISM DECK

Housing ................................................................................ 24

Arm (Suction)....................................................................... 24

Lever (LDG-A)/(LDG-B)..................................................... 25

Gear (Loading FT)................................................................ 25

Guide (C), Guide .................................................................. 26

Mounting Position of Main Motor Assy (M904) ................. 26

4. MECHANICAL ADJUSTMENTS.............................. 27

5. ELECTRICAL ADJUSTMENTS

Tape Section ......................................................................... 27

Tuner Section........................................................................ 28

CD Section ........................................................................... 32

6. DIAGRAMS

6-1. Block Diagram –CD Section–.......................................... 33

6-2. Block Diagram –Tape Section– ....................................... 35

6-3. Block Diagram –Main Section–....................................... 37

6-4. IC Pin Descriptions .......................................................... 39

6-5. Circuit Boards Location ................................................... 44

6-6. Printed Wiring Boards –CD Mechanism Section–........... 45

6-7. Schematic Diagram –CD Mechanism Section– ............... 47

6-8. Schematic Diagram –CD Section–................................... 50

6-9. Printed Wiring Board –CD Section–................................ 53

6-10. Schematic Diagram –Control Section– ............................ 55

6-11. Printed Wiring Board –Control Section– ......................... 57

6-12. Printed Wiring Board –Main Section–............................. 61

6-13. Schematic Diagram –Main Section–................................ 65

7. EXPLODED VIEWS

7-1. Cover Section ................................................................... 73

7-2. Front Panel Section .......................................................... 74

7-3. Chassis Section ................................................................ 75

7-4. CD Mechanism Section (1) .............................................. 76

7-5. CD Mechanism Section (2) .............................................. 77

7-6. CD Mechanism Section (3) .............................................. 78

7-7. Tape Mechanism Section ................................................. 79

8. ELECTRICAL PARTS LIST ................................... 80

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SECTION 1

GENERAL

This section extracted from instruction manual.

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SECTION 2

DISASSEMBLY

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

2-1. FRONT PANEL ASSY

PTT 2.6x6

claws

cover

PTT 2.6x10

PTT 2.6x6

PTT 2.6x1

2-2. KEY BOARD

front panel assy

claws

PTT 2.6x6

P 2x8

knob (VOL)

– 17 –

knob (D-BASS)

KEY boar

2-3. CD MECHANISM BLOCK

CD mechanism block

PTT 2.6x6

bracket (CD)

PTT 2.6x10

PTT 2.6x

2-4. HEAT SINK

heat sink

CN401

PTT 2.6x10

PTT 2.6x1

– 18 –

2-5. CD BOARD

PTT 2.6x10

CN404

CN403

ground point screw

(PTT 2.6x6)

claw

CD board

CN802

2-6. TAPE MECHANISM BLOCK

CN321

tape mechanism block

PTT 2.6x6

– 19 –

CN301

2-7. MAIN BOARD

(PTT 2.6x6)

ground point screws

MAIN board

insulating shee

2-8. CHASSIS (T) SUB ASSY

Unsolder the

lead wires.

red

white

black

P 2x3

chassis (T) sub assy

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2-9. LEVER ASSY

lever (R) assy

tension spring (LR)

lever (L) assy

guide (disc)

PS 2x4

DISC IN SW board

2-10. SERVO BOARD

claws

PS 2x4

P 2x3

loading motor assy

CN3

PS 2x4

CN2

SERVO board

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