Sony CDX-L495EE Manuel utilisateur

Ver 1.0 2003. 10

Model Name Using Similar Mechanism CDX-L490EE

CD Drive Mechanism Type MG-393XC-121//Q

Optical Pick-up Name KSS-721A

SERVICE MANUAL

East European Model

CDX-L495EE

FM/AM COMPACT DISC PLAYER

CD player section

Signal-to-noise ratio 90 dB

Frequency response 10 – 20,000 Hz

Wow and flutter Below measurable limit

Tuner section

Tuning range FM1/FM2:

87.5 – 108 MHz (at 50 kHz step)

FM3:

65 – 74 MHz (at 30 kHz step)

Aerial terminal External aerial connector

Intermediate frequency 10.7 MHz/450 kHz

Usable sensitivity 9 dBf

Selectivity 75 dB at 400 kHz

Signal-to-noise ratio 67 dB (stereo),

69 dB (mono)

Harmonic distortion at 1 kHz

0.5% (stereo),

0.3% (mono)

Separation 35 dB at 1 kHz

Frequency response 30 – 15,000 Hz

Tuning range 531 – 1,602 kHz

Aerial terminal External aerial 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 45 W ×4 (at 4 ohms)

SPECIFICATIONS

General

Outputs Audio outputs (rear)

Power aerial relay control

terminal

Inputs Telephone ATT control

terminal

Tone controls Low:

±10 dB at 60 Hz (XPLOD)

Mid:

±10 dB at 1 kHz (XPLOD)

High:

±10 dB at 10 kHz (XPLOD)

Power requirements 12 V DC car battery

(negative earth)

Dimensions Approx. 178 ×50 ×176 mm

(w/h/d)

Mounting dimension Approx. 182 ×53 ×161 mm

(w/h/d)

Mass Approx. 1.2 kg

Supplied accessories Parts for installation and

connections

Front panel case (1)

Design and specifications are subject to change without

notice.

• The tuner and CD sections have no adjustments.

Sony Corporation

e Vehicle Company

Published by Sony Engineering Corporation

9-961-293-01

2003J04-1

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE

WITH MARK 0ON 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.

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 pick-

up block. Therefore, when checking the laser diode emission, ob-

serve 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.

SERVICE NOTES

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.U) of mechanism deck which have

the “CAUTION LABEL” attached, please be sure to put a new

LABEL (OP CAUTION) (3-223-913-01) to the chassis (T.U).

CDX-L495EE

TEST DISCS

This set can playback CD-R and CD-ROM discs. The following

test discs should be used to check the capability:

CD-R test disc TCD-R082LMT (Part No. J-2502-063-1)

CD-RW test disc TCD-W082L (Part No. J-2502-063-2)

Notes on CD-R/CD-RW discs

•You can play CD-Rs (recordable CDs)/CD-RWs (rewritable CDs)

designed for audio use on this unit.

Look for these marks to distinguish CD-Rs/CD-RWs for audio

use.

These marks denote that a disc is not for audio use.

•Some CD-Rs/CD-RWs (depending on the equipment used for

its recording or the condition of the disc) may not play on this

unit.

•You cannot play a CD-R/a CD-RW that is not finalized*.

*Aprocess necessary for a recorded CD-R/CD-RW disc to be

played on the audio CD player.

CAUTION – INVISIBLE LASER RADIATION WHEN OPEN

VIEW DIRECTLYWITH OPTICAL INSTRUMENTS

DO NOT STARE INTO BEAM OR

zUNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead

free mark (LF) indicating the solder contains no lead.

(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size.)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40°C higher than

ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to

about 350°C.

Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

•Strong viscosity

Unleaded solder is more viscous (sticky, less prone to flow)

than ordinary solder so use caution not to let solder bridges

occur such as on IC pins, etc.

•Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may

also be added to ordinary solder.

EXTENSION CABLE AND SERVICE POSITION

Whenrepairing orservicing thisset, connectthe jig(extensioncable)

as shown below.

•Connect the MAIN board (CNP301) and the SERVO board (CN1)

with the extension cable (Part No. J-2502-011-1).

CDX-L495EE

MAIN BOARD

CNP301

J-2502-011-1

SERVO BOARD

CN1

TABLE OF CONTENTS

1. GENERAL

Location of controls.................................................................5

Connections ............................................................................. 6

2. DISASSEMBLY

2-1. Sub Panel Assy .................................................................... 7

2-2. CD Mechanism Block ......................................................... 8

2-3. Main Board ......................................................................... 8

2-4. Heat Sink ............................................................................. 9

2-5. Chassis (T.U) Assy .............................................................. 9

2-6. Disc in Board .................................................................... 10

2-7. Servo Board....................................................................... 10

2-8. Shaft Roller Assy, Load Board .......................................... 11

2-9. Floating Block Assy .......................................................... 11

2-10. Optical Pick-up Block .......................................................12

3. DIAGRAMS

3-1. IC Pin Description............................................................. 13

3-2. Block Diagram –CD Section–........................................... 14

3-3. Block Diagram –Tuner Section– ....................................... 15

3-4. Block Diagram –Display Section–.................................... 16

3-5. Circuit Boards Location .................................................... 17

3-6. Printed Wiring Boards –CD Mechanism Section–............ 18

3-7. Schematic Diagram –CD Mechanism Section– ................ 20

3-8. Printed Wiring Board –Main Section– .............................. 21

3-9. Schematic Diagram –Main Section (1/2)– ........................ 22

3-10. Schematic Diagram –Main Section (2/2)– ........................ 23

3-11. Printed Wiring Board –Key Section– ................................ 24

3-12. Schematic Diagram –Key Section–................................... 25

3-13. IC Block Diagrams............................................................ 26

4. EXPLODED VIEWS

4-1. Chassis Section ................................................................. 29

4-2. Front Panel Section ........................................................... 30

4-3. CD Mechanism Section (1) ............................................... 31

4-4. CD Mechanism Section (2) ............................................... 32

4-5. CD Mechanism Section (3) ............................................... 33

5. ELECTRICAL PARTS LIST ........................................ 34

CDX-L495EE

SECTION 1

GENERAL This section is extracted

from instruction manual.

CDX-L495EE

Connections

CDX-L495EE

SECTION 2

DISASSEMBLY

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

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

2-1. SUB PANEL ASSY

(Page 7)

2-2. CD MECHANISM BLOCK

(Page 8)

2-5. CHASSIS (T.U) ASSY

(Page 9)

2-6. DISC IN BOARD

(Page 10)

2-8. SHAFT ROLLER ASSY,

LOAD BOARD

(Page 11)

2-9. FLOATING BLOCK ASSY

(Page 11)

2-10. OPTICAL PICK-UP BLOCK

(Page 12)

SET

2-7. SERVO BOARD

(Page 10)

2-3. MAIN BOARD

(Page 8)

2-4. HEAT SINK

(Page 9)

claws

sub panel assy

two screws

(PTT 2.6x6)

CDX-L495EE

2-2. CD MECHANISM BLOCK

2-3. MAIN BOARD

screw

(PTT 2.6x6)

two screws

(PTT 2.6x4

)

bracket (CD)

screw

(PTT 2.6x6)

CD mechanism block

CNP301

two screws

(PTT 2.6x6

)

screw

(PTT 2.6x6)

(ground point)

two screws

(PTT 2.6x6)

(ground point)

MAIN board

two screws

(PTT 2.6x6)

CDX-L495EE

2-4. HEAT SINK

2-5. CHASSIS (T.U) ASSY

screw

(PTT 2.6x8)

screw

(PTT 2.6x8

)

heat sink

two screws

(PTT 2.6x12)

chassis (T.U) assy

two screws

(P 2x3)

two screws

(P 2x3)

Unsolder the

lead wires.

black

red

white

CDX-L495EE

2-6. DISC IN BOARD

2-7. SERVO BOARD

claws

DISC IN board

guide (disc)

screw

(PS 2x3)

two screws

(PTT 2x4)

screw

(PTT 2x4)

CN3

Removal the solders.

screw

(P 2x3)

loading motor assy

SERVO board

PICK-UP FLEXIBLE board

optical pick-up block

Unsolder the

lead wires.

black

yellow

Table des matières

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