SONY CDX-L470 Service Manual

CDX-L350/L450X/L470X

SERVICE MANUAL

Ver 1.1 2001. 08

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 –

9-870-257-12

FM/AM COMPACT DISC PLAYER

Sony Corporation

e Vehicle Company Shinagawa Tec Service Manual Production Group

CDX-L350/L450X/L470X

General

Outputs Audio output

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

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

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

Power requirements 12 V DC car battery

(negative ground)

Dimensions Approx. 178 × 50 × 176 mm

(7 1/8 × 2 × 7 in.) (w/h/d)

Mounting dimensions Approx. 182 × 53 × 161 mm

(7 1/4 × 2 1/8 × 6 3/8 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)

Card remote commander

RM-X115 (CDX-L350/L470X)

Note (L450X/L470X)

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

Design and specifications are subject to change without notice.

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 bloc

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.

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 2.6x

2-3. MAIN BOARD

4 screws (+BTT)

5 MAIN board

1 PTT 2.6x6

4 CNP701

3 screw (+BTT)

2 PTT 2.6x

1 PTT 2.6x8

6 heat sink

1 PTT 2.6x8

2 PTT 2.6x8

4 PTT 2.6x8

3 PTT 2.6x12

5 PTT 2.6x8

2-4. HEAT SINK

CDX-L350/L450X/L470X

2-5. CHASSIS (T) SUB ASSY

1 Unsolder the lead wires.

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

SECTION 3

ELECTRICAL ADJUSTMENTS

CDX-L350/L450X/L470X

TEST MODE

This set have the test mode function. In the test mode, FM Auto Scan/Stop Level and AM Auto Scan/Stop Level check can be performed easier than it in ordinary procedure.

1. Turn ON the regulated power supply to ACC and BATT terminals is “OFF” position (display 1:00).

2. Push the preset 4 button.

3. Push the preset 5 button.

4. Press the preset 1 button for more than two seconds.

5. Then the display and LED on the front panel indicates all lights, the test mode is set.

1. Push the OFF button.

TUNER SECTION

Cautions during repair

When the tuner unit is defective, replace it by a new one because its internal block is difficult to repair.

Note on Adjustment

The adjustments of tuner section, should be performed according to the following sequence.

1. FM Auto Scan/Stop Level Adjustment

2. FM Stereo Separation Adjustment

3. AM Auto Scan/Stop Level Adjustment

FM Auto Scan/Stop Level Adjustment

Setting :

SOURCE button : FM FREQUENCY SELECT switch (L450X/L470X): FM 50k

FM RF signal

generator

Carrier frequency : 97.9 MHz (L350) Output level : 22 dB (12.6 µV)

Mode : mono Modulation : 1 kHz, 22.5 kHz deviation (30%)

0 dB = 1 µV

antenna

0.01 µF

: 98.0 MHz (L450X/L470X)

terminal

set

Procedure :

1. Set to the test mode.

2. Push the SRC button and set to FM.

Display

3. Adjust with the volume RV2 on TU601 so that the “FM” indication turns to “FM0” indication on the display window. But, in case of already indicated “FM0”, turn the RV2 so that put out light “0” indication and adjustment.

FM0Z

*1: L450X/L470X are indicates “98.00”.

Adjustment Location : See page 16.

97.90

Display

97.90

SHUF

CDX-L350/L450X/L470X

FM Stereo Separation Adjustment

Setting :

SOURCE button : FM FREQUENCY SELECT switch (L450X/L470X): FM 50k

FM RF signal

generator

0.01 µF

Carrier frequency : 97.9 MHz (L350)

: 98.0 MHz (L450X/L470X) Output level : 70 dB (3.2 mV) Mode : stereo Modulation : main :1 kHz, 33.75 kHz deviation (45%)

sub :1 kHz, 33.75 kHz deviation (45%)

19 kHz pilot : 7.5 kHz deviation (10%)

Procedure :

FM stereo

signal generator

output channel

L-CH L-CH A

R-CH L-CH Adjust RV1 on TU601

R-CH R-CH C

L-CH R-CH Adjust RV1 on TU601

L-CH stereo separation : A – B R-CH stereo separation : C – D The separations of both channels should be equal.

Specification : Separation more than 24 dB

Adjustment Location :

RV2

FM Auto Scan/Stop

Level Adjustment

antenna terminal

set

AUDIO OUT REAR

Level meter Level meter

connection reading (dB)

for maximum reading.

level mete

10 kΩ

AM Auto Scan/Stop Level Check

Note : This adjustment should be performed after the FM Auto

Scan / Stop Level Adjustment is done.

Setting :

SOURCE t MODE button : AM FREQUENCY SELECT switch (L450X/L470X): AM 9k

15 pF

30 Ω

65 pF

AM RF signal

generator

Carrier frequency : 1000 kHz (L350) Output level : 30 dB (44.7 µV)

Mode : mono Modulation : 1 kHz, 22.5 kHz deviation (30%)

Procedure :

1. Set to the test mode. (See page 15)

2. Push the SRC button.

3. Push the MODE button and set to AM.

4. Check that the “AM” indication turns to “AM0” indication on the display window.

AM0Z

*2: L450X/L470X are indicates “999”.

AM dummy antenna (50 Ω)

: 999 kHz (L450X/L470X)

Display

1 00ZZZ

Display

1 00ZZZ

SHUF

set

antenna terminal

TU601(Component Side)

RV1

FM Stereo Separation

Adjustment

SECTION 4

DIAGRAMS

4-1. IC PIN DESCRIPTION

• IC801 µPD780024AGK-B26-9ET (SYSTEM CONTROLLER)

Pin No. Pin Name I/O Pin Description

1 D SW I Down switch detection input 2 IN SW I Disc in switch detection input 3 PH3 I PH3 detection input (Not used in this set) 4 LM LD O Loading motor drive output (Loading) 5 LM EJ O Loading motor drive output (Eject) 6 A ATT O Power amplifier mute control output 7 ATT O Line out mute control output 8 BEEP O BEEP output

9 VSSO — Ground 10 VDDO — Power supply pin (+5 V) 11 VOL CLK O Electric volume clock output 12 VOL DO O Electric volume data out output 13 VOL CE O Electric volume chip enable output 14 AM ON O Tuner AM power supply control output 15 FM ON O Tuner FM power supply control output 16 NOSE I Front panel attachment detection input 17 PLL DI I PLL IC data input 18 LCD DO O LCD data output 19 LCD CE O LCD chip enable output 20 LCD CLK O LCD clock output 21 PLL CLK O PLL IC clock output 22 PLL DO O PLL IC data output 23 PLL CE O PLL IC chip enable output 24 VDD1 — Power supply pin (+5 V) 25 AVSS — Ground 26 ST IND I FM STEREO detection input 27 FUN SEL I Function select input 28 S METER I S meter signal input

29, 30 KEY0, 1 I A/D key input 0, 1

31 TEL ATT I Attenuator signal input 32 DST SEL I Destination select input 33 TEST I Force test mode input 34 AVREF — A/D converter power supply pin (+5 V) 35 AVDD — A/D converter power supply pin (+5 V) 36 RESET I Reset input 37 XT2 O Sub clock output (32.768 kHz) 38 XT1 I Sub clock input (32.768 kHz) 39 IC — Connect to Ground in this set. 40 X2 O Master clock output (8.38 MHz) 41 X1 I Master clock input (8.38 MHz) 42 VSS1 — Ground 43 KEY ACK I Key acknowledge detection input 44 SIRCS I SIRCS input 45 SELF SW I Self switch detection input 46 BU IN I Backup power supply detection input 47 AD ON O Key power supply control output 48 ILL ON O Illumination power supply control output 49 AMP ON O Amplifier remote power supply control output 50 CDM ON O CD mechanism deck power supply control output 51 XCD ON O CD DSP IC 16 MHz X’tal ON/OFF control output 52 TU ON O Tuner power supply control output

CDX-L350/L450X/L470X

+ 39 hidden pages

SONY CDX-L470 Service Manual

SERVICE NOTES

TABLE OF CONTENTS

GENERAL

DISASSEMBLY

5 sub panel assy

5 CD mechanism block

5 MAIN board

6 heat sink

4 chassis (T) sub assy

8 SERVO board

5 shaft roller assy

6 floating block assy

3 optical pick-up block

DIAGRAMS