SONY CDXC4750 - Service Manual Immediate Download

Model Name Using Similar Mechanism

CDX-C480/C580

CD Drive Mechanism Type

MG-363X-121

Optical Pick-up Name

KSS-521A

SERVICE MANUAL

US Model

CDX-C4750

E Model

CDX-C6600

CDX-C4750/C6600

FM/AM COMPACT DISC PLAYER

AUDIO POWER SPECIFICATIONS (US Model)

POWER OUTPUT AND TOTAL HARMONIC DISTORTION

17 watts per channel minimum continuous average power into

4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more

than 1% total harmonic distortion.

Other Specifications

CD player section

System

Compact disc digital audio

system

Signal-to-noise ratio

90 dB

Frequency response

10 20,000 Hz

Wow and flutter

Below measurable limit

Laser Diode Properties

Material

GaAlAs

Wavelength

780 nm

Emission Duration

Continuous

Laser output power

Less than 44.6 µW*

* This output is the value measured at a distance

of 200 mm from the objective lens surface on the

Optical Pick-up Block.

Tuner section

Tuning range

US model:

87.5 107.9 MHz

E model:

FM tuning interval:

50 kHz/200 kHz switchable

87.5 108.0 MHz

(at 50 kHz step)

87.5 107.9 MHz

(at 200 kHz step)

Antenna terminal

External antenna connector

Intermediate frequency 10.7 MHz

Usable sensitivity

12 dBf

Selectivity

75 dB at 400 kHz

Signal-to-noise ratio

65 dB (stereo),

68 dB (mono)

Harmonic distortion at 1 kHz

0.7% (stereo),

0.5% (mono)

Separation

35 dB at 1 kHz

Frequency response

30 15,000 Hz

SPECIFICATIONS

Photo: CDX-C4750

Tuning range

US model:

530 1,710 kHz

E model:

AM tuning interval:

9 kHz/10 kHz switchable

531 1,602 kHz

(at 9 kHz step)

530 1,710 kHz

(at 10 kHz step)

Antenna terminal

External antenna connector

Intermediate frequency 10.7 MHz/450 kHz

Sensitivity

30 µV

Power amplifier section

Outputs

Speaker outputs

(sure seal connectors)

Speaker impedance

4 8 ohms

Maximum power output 40 W

× 4 (at 4 ohms)

Continued on next page

Ver 1.1 2001. 02

9-926-441-12

2001B0400-1

Sony Corporation

Audio Entertainment Group

General Engineering Dept.

TABLE OF CONTENTS

1. GENERAL

Location of controls ................................................................ 3

Getting Started ........................................................................ 3

Setting the clock ..................................................................... 3

CD Player ................................................................................ 3

Radio ....................................................................................... 4

Other Functions ...................................................................... 4

CD/MD Unit ........................................................................... 5

TV/Video ................................................................................ 7

Connections ............................................................................ 8

2. DISASSEMBLY

2-1. Cover Assy ........................................................................ 10

2-2. Front Panel Assy ............................................................... 10

2-3. Sub Panel (1) Assy ............................................................ 11

2-4. CD Mechanism Block ....................................................... 11

2-5. Main Board ....................................................................... 12

2-6. Heat Sink ........................................................................... 12

2-7. Chassis (T) Sub Assy ........................................................ 13

2-8. Lever Assy ......................................................................... 13

2-9. Servo Board ....................................................................... 14

2-10. Roller Assy ........................................................................ 14

2-11. Chassis (OP) (O/S) Assy ................................................... 15

2-12. Optical Pick-up Block ....................................................... 15

3. ELECTRICAL ADJUSTMENTS

Tuner Section ........................................................................ 16

CD Section ............................................................................ 18

4. DIAGRAMS

4-1. Block Diagram CD Section ........................................... 19

4-2. Block Diagram Main Section ........................................ 21

4-3. Circuit Boards Location .................................................... 23

4-4. Printed Wiring Boards CD Mechanism Section ........... 25

4-5. Schematic Diagram CD Mechanism Section ................ 27

4-6. Printed Wiring Board Main Section .............................. 29

4-7. Schematic Diagram Main Section (1/2) ........................ 33

4-8. Schematic Diagram Main Section (2/2) ........................ 35

4-9. Printed Wiring Board Display Section .......................... 37

4-10. Schematic Diagram Display Section ............................. 39

4-11. IC Pin Description ............................................................. 45

5. EXPLODED VIEWS

5-1. Chassis Section ................................................................. 48

5-2. Front Panel Section ........................................................... 49

5-3. CD Mechanism Section (1) ............................................... 50

5-4. CD Mechanism Section (2) ............................................... 51

5-5. CD Mechanism Section (3) ............................................... 52

6. ELECTRICAL PARTS LIST ......................................... 53

SERVICE NOTE

CAUTION

Use of controls or adjustments or performance of proce-

dures other than those specified herein may result in haz-

ardous 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 HANDLINGTHE 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 pick-up

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 pick-up

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 pick-up

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 PARTS WHOSE

PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR

IN SUPPLEMENTS PUBLISHED BY SONY.

General

Outputs

Line outputs (2)

Power antenna relay

control lead

Power amplifier control

lead

Telephone ATT control

lead

Tone controls

Bass

±8 dB at 100 Hz

Treble

±8 dB at 10 kHz

Power requirements

12 V DC car battery

(negative ground)

Dimensions

Approx. 178

× 50 × 185 mm

(7 1/8

× 2 × 7 3/8 in.)

(w/h/d)

Mounting dimensions

Approx. 182

× 53 × 162 mm

(7 1/4

× 2 1/8 × 6 1/2 in.)

(w/h/d)

Mass

Approx. 1.2 kg (2 lb. 10 oz.)

Supplied accessories

Parts for installation and

connections (1 set)

Front panel case (1)

Design and specifications are subject to change without

notice.

SECTION 1

GENERAL

This section is extracted from

CDX-C4750's instruction manual.