SONY CDX-L350, CDX-450X, CDX- 470X Service Manual

CDX-L350/L450X/L470X

SERVICE MANUAL

Ver 1.0 2001. 01

Photo: CDX-L470X

• The CD sections have no adjustments.

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS (US Model)

POWER OUTPUT AND TOTAL HARMONIC DISTORTION 23 watts per channel minimum continuous average power into 4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more than 5% total harmonic distortion.

CD player section

Signal-to-noise ratio 90 dB Frequency response 10 – 20,000 Hz Wow and flutter Below measurable limit Laser Diode Properties (CDX-L350)

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 CDX-L350:

Antenna terminal External antenna connector Intermediate frequency 10.7 MHz Usable sensitivity 11 dBf Selectivity 75 dB at 400 kHz Signal-to-noise ratio 65 dB (stereo),

87.5 – 107.9 MHz CDX-L450X/L470X: FM tuning interval: 50 kHz/200 kHz switchable

87.5 – 108 MHz (at 50 kHz step)

87.5 – 107.9 MHz (at 200 kHz step)

68 dB (mono)

US Model

Canadian Model

CDX-L350

AEP Model

CDX-L450X

E Model

CDX-L450X/L470X

Model Name Using Similar Mechanism NEW CD Drive Mechanism Type MG-393X-121//K Optical Pick-up Name KSS-720A

Harmonic distortion at 1 kHz

0.7% (stereo),

0.5% (mono) Separation 33 dB at 1 kHz Frequency response 30 – 15,000 Hz

Tuning range CDX-L350:

530 – 1,710 kHz CDX-L450X/L470X: 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 50 W × 4 (at 4 ohms)

– Continued on next page –

9-870-257-11

FM/AM COMPACT DISC PLAYER

Sony Corporation

Audio Entertainment Group General Engineering Dept.

CDX-L350/L450X/L470X

General

Outputs Audio output

Tone controls Bass ±10 dB at 20 Hz (CDX-L350)

Power requirements 12 V DC car battery

Dimensions Approx. 178 × 50 × 176 mm

Mounting dimensions Approx. 182 × 53 × 161 mm

Mass Approx. 1.2 kg (2 lb. 10 oz.) Supplied accessories Parts for installation and

Note (L450X/L470X)

This unit cannot be connected to a digital preamplifier or an equalizer.

Design and specifications are subject to change without notice.

Power amplifier control lead (CDX-L350) Power antenna relay control lead (CDX-L350) Power aerial relay control lead (CDX-L450X/L470X)

Treble ±10 dB at 20 kHz (CDX-L350) Bass ±9 dB at 100 Hz (L450X/L470X) Treble ±9 dB at 10 kHz (L450X/L470X)

(negative ground)

1/8 × 2 × 7 in.)

(w/h/d)

1/4 × 2 1/8 × 6 3/8 in.)

(w/h/d)

connections (1 set) Front panel case (1) Card remote commander RM-X115 (CDX-L350/L470X)

US/Canadian/E model:

CAUTION

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

If the optical pick-up block is defective, please replace the whole optical pick-up block. Never turn the semi-fixed resistor located at the side of optical pick-up block.

optical pick-up block

semi-fixed resistor

SERVICE NOTES

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 Chip Component Replacement

• Never reuse a disconnected chip component.

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

aged by heat.

AEP model:

This product is classified as a CLASS 1 LASER PRODUCT. This label is located on the bottom of the chassis.

This label is located on the drive unit's internal chassis.

When replacing the chassis (T) of mechanism deck which have the “CAUTION LABEL” attached, please be sure to put a new CAUTION LABEL (3-223-913-11) to the chassis (T).

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY P ARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!!

LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

TABLE OF CONTENTS

1. GENERAL

Location of controls................................................................. 4

Getting Started......................................................................... 4

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

Radio ....................................................................................... 5

Other Functions ....................................................................... 6

Connections ............................................................................. 7

2. DISASSEMBLY

2-1. Sub Panel Assy.................................................................... 9

2-2. CD Mechanism Block ....................................................... 10

2-3. Main Board ....................................................................... 10

2-4. Heat Sink ........................................................................... 11

2-5. Chassis (T) Sub Assy ........................................................ 11

2-6. Lever Section .................................................................... 12

2-7. Servo Board....................................................................... 12

2-8. Shaft Roller Assy .............................................................. 13

2-9. Floating Block Assy .......................................................... 13

2-10. Optical Pick-up Block ....................................................... 14

CDX-L350/L450X/L470X

3. ELECTRICAL ADJUSTMENTS.................................15

4. DIAGRAMS

4-1. IC Pin Description............................................................. 17

4-2. Block Diagram –CD Section–........................................... 19

4-3. Block Diagram –Tuner Section–....................................... 20

4-4. Block Diagram –Display Section–.................................... 21

4-5. Circuit Boards Location .................................................... 21

4-6. Printed Wiring Boards –CD Mechanism Section–............ 22

4-7. Schematic Diagram –CD Mechanism Section– ................ 24

4-8. Printed Wiring Board –Main Section–.............................. 25

4-9. Schematic Diagram –Main Section (1/2)– ........................ 26

4-10. Schematic Diagram –Main Section (2/2)– ........................ 27

4-11. Printed Wiring Board –Display Section– .......................... 28

4-12. Schematic Diagram –Display Section–............................. 29

5. EXPLODED VIEWS

5-1. Chassis Section ................................................................. 32

5-2. Front Panel Section ........................................................... 33

5-3. CD Mechanism Section (1) ............................................... 34

5-4. CD Mechanism Section (2) ............................................... 35

5-5. CD Mechanism Section (3) ............................................... 36

6. ELECTRICAL PARTS LIST ........................................ 37

CDX-L350/L450X/L470X

SECTION 1

GENERAL

This section is extracted from instruction manual.

CDX-L350/L450X/L470X

Connections

CDX-L350/L450X/L470X

SECTION 2

DISASSEMBLY

Note : This set can be disassemble according to the following sequence.

CDX-L350/L450X/L470X

Set Sub Panel Assy CD Mechanism Block

Chassis (T) Sub Assy Lever Section

Servo Board

Floating Block Assy Optical Pick-up Block

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

2-1. SUB PANEL ASSY

3 claw

2 PTT 2.6x6

Main Board Heat Sink

Shaft Roller Assy

three claws

1 PTT 2.6x6

4 claws

5 sub panel assy

CDX-L350/L450X/L470X

2-2. CD MECHANISM BLOCK

5 CD mechanism block

2 PTT 2.6x6

7 bracket (CD)

6 PTT 2.6x6

2-3. MAIN BOARD

4 screws (+BTT)

5 MAIN board

1 PTT 2.6x6

4 CNP701

3 screw (+BTT)

2 PTT 2.6x8

1 PTT 2.6x8

2-4. HEAT SINK

CDX-L350/L450X/L470X

6 heat sink

5 PTT 2.6x8

4 PTT 2.6x8

2-5. CHASSIS (T) SUB ASSY

1 Unsolder the lead wires.

3 PTT 2.6x12

2 PTT 2.6x8

1 PTT 2.6x8

2 P 2x3

3 P 2x3

4 chassis (T) sub assy

black red white

CDX-L350/L450X/L470X

2-6. LEVER SECTION

5 guide (disc)

6 lever (R)

3 tension spring (LR)

7 lever (L)

1 special screw

2 IN SELF SW board

2-7. SERVO BOARD

4 claws

6 special screws

3 Removal the solders.

1 CN3

4 P 2x3

5 loading motor assy

7 special screw

2 CN2

8 SERVO board

Fig. 1

1 tension spring (RA)

2 arm (roller)

3 retaing ring (RA)

4 shaft retainer

5 shaft roller assy

retaing ring (RA)

arm

washer

shaft retainer

2-8. SHAFT ROLLER ASSY

• When installing, take note of the positions

arm (roller) and washers. (Fig. 1)

CDX-L350/L450X/L470X

2-9. FLOATING BLOCK ASSY

7 compression spring (FL)

1 tension spring (KF1)

5 Turn loading ring in the

direction of the arrow.

6 floating block assy

8 compression spring (FL)

4 Fit lever (D) in the

direction of the arrow.

3 damper (T)

2 damper (T)

CDX-L350/L450X/L470X

2-10. OPTICAL PICK-UP BLOCK

1 P 2x3

2 sled motor assy

3 optical pick-up block

+ 30 hidden pages