Sony CDX-MP50 Bedienungsanleitung

Ver 1.0 2003. 02

Model Name Using Similar Mechanism CDX-MP40

CD Drive Mechanism Type MG-393MC-121

Optical Pick-up Name KSS-721A

SERVICE MANUAL

E Model

CDX-MP50

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 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/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 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

SPECIFICATIONS

Power amplifier section

Outputs Speaker outputs

(sure seal connectors)

Speaker impedance 4 – 8 ohms

Maximum power output 52 W ×4 (at 4 ohms)

General

Outputs Audio outputs (front/rear)

Power antenna relay control terminal

Power amplifier control terminal

Inputs TelephoneATT control terminal

BUS control input terminal

BUS audio input terminal

Remote controller input terminal

Antenna input terminal

Tone controls Low: ±10 dB at 60 Hz (XPLOD)

Mid: ±10 dB at 1 kHz (XPLOD)

High: ±10 dB at 10 kHz (XPLOD)

• The tuner and CD sections have no adjustments.

Sony Corporation

e Vehicle Company

Published by Sony Engineering Corporation

9-877-091-01

2003B0400-1

– Continued on next page –

FM/AM COMPACT DISC PLAYER

CDX-MP50

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.

Power requirements 12 V DC car battery

(negative earth)

Dimensions Approx. 178 ×50 ×180 mm

(w/h/d)

Mounting dimensions Approx. 182 ×53 ×161 mm

(w/h/d)

Mass Approx. 1.2 kg

Supplied accessories Parts for installation and connections

Front panel case (1)

Card remote commander RM-X115

Note

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

which is Sony BUS system compatible.

Design and specifications are subject to change without

notice.

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.

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)

SERVICE NOTES

This label is located on the bottom of the chassis.

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

CDX-MP50

Notes on CD-Rs (recordable CDs)/CD-RWs (rewritable

CDs)

This unit can play the following discs:

Type of discs Label on the disc

Audio CD

MP3 files

•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/CD-RW that is not finalized∗.

•You can play MP3 files recorded on CD-ROMs, CD-Rs, and

CD-RWs.

•A CD-R/CD-RW to which a session can be added can be played.

∗A process necessary for a recorded CD-R/CD-RW disc to be

played on the audio CD player.

EXTENSION CABLE AND SERVICE POSITION

Whenrepairingorservicingthisset,connectthejig(extensioncable)

as shown below.

•Connect the MAIN board (CNP701) and the SERVO board (CN1)

with the extension cable (Part No. J-2502-062-1).

•Connect the RELAY board (CNP902) and the DISPLAY board

(CN901) with the extension cable (Part No. J-2502-071-1).

MAIN BOARD CNP701

J-2502-071-1

SERVO BOARD CN1

RELAY BOARD CNP902

DISPLAY BOARD CN901

CDX-MP50

TABLE OF CONTENTS

1. GENERAL

Location of Controls................................................................ 5

Connections ............................................................................. 5

2. DISASSEMBLY

2-1. Sub Panel Assy (CD)........................................................... 7

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

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

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

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

2-6. Lever Section..................................................................... 10

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

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

2-9. Floating Block Assy .......................................................... 12

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

3. DIAGRAMS

3-1. IC Pin Descriptions ...........................................................13

3-2. Circuit Boards Location .................................................... 18

3-3. Block Diagram –CD Section–........................................... 19

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

3-5. Block Diagram –Display Section–.................................... 21

3-6. Printed Wiring Boards –CD Mechanism Section–............ 22

3-7. Schematic Diagram –CD Mechanism Section (1/2)– ....... 24

3-8. Schematic Diagram –CD Mechanism Section (2/2)– ....... 25

3-9. Printed Wiring Boards –Main Section– ............................ 26

3-10. Schematic Diagram –Main Section (1/2)– ........................ 27

3-11. Schematic Diagram –Main Section (2/2)– ........................ 28

3-12. Printed Wiring Board –Relay Section– ............................. 29

3-13. Printed Wiring Board –Display Section– .......................... 30

3-14. Schematic Diagram –Display Section–............................. 31

3-15. IC Block Diagrams............................................................ 32

4. EXPLODED VIEWS

4-1. Chassis Section ................................................................. 34

4-2. Front Panel Section ........................................................... 35

4-3. CD Mechanism Section (1) ............................................... 36

4-4. CD Mechanism Section (2) ............................................... 37

4-5. CD Mechanism Section (3) ............................................... 38

5. ELECTRICAL PARTS LIST ........................................ 39

CDX-MP50

SECTION 1

GENERAL This section is extracted

from instruction manual.

Connections

CDX-MP50

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 (CD)

(Page 7)

2-2. CD MECHANISM BLOCK

(Page 8)

2-5. CHASSIS (T) SUB ASSY

(Page 9)

2-6. LEVER SECTION

(Page 10)

2-8. SHAFT ROLLER ASSY,

LOAD SW BOARD

(Page 11)

2-9. FLOATING BLOCK ASSY

(Page 12)

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)

CN802

sub panel assy (CD)

claws

PTT 2.6x6

CDX-MP50

2-2. CD MECHANISM BLOCK

2-3. MAIN BOARD

PTT 2.6x6

PTT 2.6x

bracket (CD)

PTT 2.6x6

CD mechanism block

CNP701

PTT 2.6x8

PTT 2.6x

screw (+BTT)

screws (+BTT)

MAIN board

CDX-MP50

2-5. CHASSIS (T) SUB ASSY

2-4. HEAT SINK

PTT 2.6x8

PTT 2.6x

P 2.6x8

PTT 2.6x12

heat sink

Unsoldering three lead wires.

chassis (T) sub ass

black

SERVO board

(SIDE A)

red

white

P 2x3

CDX-MP50

2-6. LEVER SECTION

2-7. SERVO BOARD

two claws

special screw

lever (L)

lever (R)

tension spring (LR)

DISC IN SW board

guide (disc)

CN3

Removal the solders.

special screws

special screw

CN2

optical pick-up block

SERVO board

P2x3

loading motor assy

Unsolder the

lead wires.

black

yellow

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