Sony CDX-MP50 Service Manual
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Sony CDX-MP50 Service Manual

Fm/am compact disc player
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SERVICE MANUAL
Ver 1.0 2003. 02
• The tuner and CD sections have no adjustments.
CD player section
Signal-to-noise ratio
90 dB
Frequency response
10 – 20,000 Hz
Wow and flutter
Below measurable limit
Tuner section
FM
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
AM
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
Sony Corporation
9-877-091-01
2003B0400-1
e Vehicle Company
© 2003. 02
Published by Sony Engineering Corporation
CDX-MP50
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
Power amplifier section
Outputs
Speaker impedance
Maximum power output 52 W × 4 (at 4 ohms)
General
Outputs
Inputs
Tone controls
FM/AM COMPACT DISC PLAYER
E Model
CDX-MP40
MG-393MC-121
KSS-721A
Speaker outputs
(sure seal connectors)
4 – 8 ohms
Audio outputs (front/rear)
Power antenna relay control terminal
Power amplifier control terminal
Telephone ATT control terminal
BUS control input terminal
BUS audio input terminal
Remote controller input terminal
Antenna input terminal
Low: ±10 dB at 60 Hz (XPLOD)
Mid: ±10 dB at 1 kHz (XPLOD)
High: ±10 dB at 10 kHz (XPLOD)
– Continued on next page –
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  • Page 1 530 – 1,710 kHz (at 10 kHz step) Antenna terminal External antenna connector Intermediate frequency 10.7 MHz/450 kHz Sensitivity 30 µV FM/AM COMPACT DISC PLAYER Sony Corporation 9-877-091-01 2003B0400-1 e Vehicle Company © 2003. 02 Published by Sony Engineering Corporation...
  • Page 2 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 PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
  • Page 3 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.

  • Page 4: Table Of Contents

    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.

  • Page 5: General

    CDX-MP50 SECTION 1 GENERAL This section is extracted from instruction manual. Connections...
  • Page 6 CDX-MP50...

  • Page 7: Disassembly

    CDX-MP50 SECTION 2 DISASSEMBLY Note : This set can be disassemble according to the following sequence. 2-5. CHASSIS (T) SUB ASSY 2-1. SUB PANEL ASSY (CD) (Page 9) (Page 7) 2-6. LEVER SECTION 2-7. SERVO BOARD 2-2. CD MECHANISM BLOCK...

  • Page 8: Cd Mechanism Block

    CDX-MP50 2-2. CD MECHANISM BLOCK 7 bracket (CD) 5 CD mechanism block 6 PTT 2.6x6 2 PTT 2.6x6 1 PTT 2.6x6 4 CNP701 2-3. MAIN BOARD 3 screw (+BTT) 5 MAIN board 4 screws (+BTT) 2 PTT 2.6x8 1 PTT 2.6x8...

  • Page 9: Heat Sink

    CDX-MP50 2-4. HEAT SINK 6 heat sink 5 PTT 2.6x8 4 P 2.6x8 3 PTT 2.6x12 2 PTT 2.6x8 1 PTT 2.6x8 2-5. CHASSIS (T) SUB ASSY 2 P 2x3 3 P 2x3 4 chassis (T) sub assy 1 Unsoldering three lead wires.

  • Page 10: Lever Section

    CDX-MP50 2-6. LEVER SECTION 5 guide (disc) 6 lever (R) 3 tension spring (LR) 7 lever (L) 1 special screw 2 DISC IN SW board 4 two claws 2-7. SERVO BOARD 9 SERVO board 8 special screw 7 special screws 3 Removal the solders.

  • Page 11: Shaft Roller Assy, Load Sw Board

    CDX-MP50 2-8. SHAFT ROLLER ASSY, LOAD SW BOARD • When installing, take note of the positions arm (roller) and washers. (Fig. 1) 3 retaining ring (RA) shaft retainer (roller) shaft retainer (roller) 4 shaft retainer (roller) washer washer retaining ring (RA) arm Fig.

  • Page 12: Floating Block Assy

    CDX-MP50 2-9. FLOATING BLOCK ASSY 6 floating block assy 7 compression spring (FL) 1 tension spring (KF1) 8 compression spring (FL) 5 Turn loading ring in the direction of the arrow. 4 Fit lever (D) in the direction of the arrow.

  • Page 13: Diagrams

    CDX-MP50 SECTION 3 DIAGRAMS 3-1. IC PIN DESCRIPTIONS • IC3 HD6432238RWN35TEI (CD MASTER CONTROL) (SERVO BOARD) Pin No. Pin Name Pin Description TEST Test mode selection pin Not used. (Open) DECXRST Reset signal output to the DSP IC “L”: reset DECSTBY Standby mode control signal output to the DSP IC “H”: standby...
  • Page 14 LED clock output for the jig LEDLAT LED latch signal output for the jig 89, 90 Not used. (Open) BUSON Sony-Bus BUS ON signal input from the bus interface BUCHK Back up power supply detection signal input A-ATT Audio muting control signal output CDON Power control signal output for the CD servo “H”: servo on, “L”: during loading...
  • Page 15 CDX-MP50 • IC5 CXD9684R-005 (DSP) (SERVO BOARD) Pin No. Pin Name Pin Description /RESET Reset input pin “L”: reset MIMD Microcomputer interface mode selection input “H”: I2C, “L”: TSB 3, 4 AD0, AD1 External SRAM address signal output MIDIO (I2C_SDA)
  • Page 16 CDX-MP50 • IC801 MN101C49KSJ (SYSTEM CONTROL) (MAIN BOARD) Pin No. Pin Name Pin Description VREF– — Power supply pin for A/D converter S-meter voltage detection signal input from the tuner unit (TUX501) Not used. (Connected to ground.) KEYIN1 Key signal input...
  • Page 17 CDX-MP50 Pin No. Pin Name Pin Description TU ON Tuner power supply control signal output VOLATT Electronic volume ATT control signal output to the electronic volume Not used. (Open) AMPON Power amplifier standby control signal output to the power amplifier Not used.

  • Page 18: Circuit Boards Location

    CDX-MP50 3-2. CIRCUIT BOARDS LOCATION SERVO board LIMIT SW board DISC IN SW board SPEAKER board LOAD SW board tuner unit (TUX501) MAIN board DISPLAY board RELAY board...

  • Page 19: Block Diagram -Cd Section

    CDX-MP50 3-3. BLOCK DIAGRAM — CD SECTION — RF AMP,DIGITAL SERVO OPTICAL PICK-UP DIGITAL SIGNAL PROCESSOR KSS-721A (Page 20) MAIN SECTION LOUT ROUT CD MASTER CONTROL CONV R-CH DEMOD 5V 3.3V PACK 38 PACK TSTB 34 TSTB DSUB CODE TSCK PROCESS CONV.

  • Page 20: Block Diagram -Main Section

    CDX-MP50 3-4. BLOCK DIAGRAM — MAIN SECTION — PJ401 BUS AUDIO IN R-CH AUDIO OUT FRONT R-CH IC401 AUDIO OUT REAR INPUT SELECTOR, ELECTRONIC VOLUME, R-CH SIGNAL PROCESSOR IC501 POWER AMP CNP901 AUX L R-CH 8 CD R OUT LF...

  • Page 21: Block Diagram -Display Section

    CDX-MP50 • Waveforms 3-5. BLOCK DIAGRAM — DISPLAY SECTION — THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. — SERVO Board — (In addition to this, the necessary note is MAIN Board (MODE: CD PLAY) — —...

  • Page 22: Printed Wiring Boards -Cd Mechanism Section

    CDX-MP50 3-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION — • Refer to page 18 for Circuit Boards Location. • Semiconductor Location Ref. No. Location (IC6) (IC12) (Q1) ): SIDE B R114 R121 R105 R107 IC12 R130 JR14...
  • Page 23 CDX-MP50 R118 R111 R109 R100 R117 (Page 26) R148 R102 R128 R124 C113 R136 R132 R153 R131 JR15 R143 R145 R144 JR12 R142 R146...

  • Page 24: Schematic Diagram -Cd Mechanism Section (1/2)

    CDX-MP50 • Refer to page 21 for Waveforms. 3-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (1/2) — • Refer to page 32 for IC Block Diagram. Note: • Voltage is dc with respect to ground under no-signal conditions. no mark : CD PLAY M902 ∗...

  • Page 25: Schematic Diagram -Cd Mechanism Section (2/2)

    CDX-MP50 • Refer to page 21 for Waveform. 3-8. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (2/2) — • Refer to page 32 for IC Block Diagrams. (Page 24) R105 (Page 24) C114 TP92 IC B/D TP31 TP33 R109 R111 TP30...

  • Page 26: Printed Wiring Boards -Main Section

    CDX-MP50 • Refer to page 18 for Circuit Boards Location. 3-9. PRINTED WIRING BOARDS — MAIN SECTION — • Refer to page 28 for Semiconductor Location. PJ401 CNP801 PJ601 JW133 JR401 CNP901 JW202 JW201 D907 JW203 JW204 C415 D906 JW206...

  • Page 27: Schematic Diagram -Main Section (1/2)

    CDX-MP50 3-10. SCHEMATIC DIAGRAM — MAIN SECTION (1/2) — • Refer to page 33 for IC Block Diagram. PJ401 C421 C717 C420 PJ601 IC401 IC B/D C629 C419 C215 R103 C418 C106 R102 C213 C429 R416 R415 C417 R112 JR116...

  • Page 28: Schematic Diagram -Main Section (2/2)

    CDX-MP50 • Refer to page 21 for Waveforms. 3-11. SCHEMATIC DIAGRAM — MAIN SECTION (2/2) — • Refer to page 32 for IC Block Diagram. (Page 27) R707 R706 R801 R802 D801 D802 R705 IC701 D808 C716 IC902 Q804 Q801...

  • Page 29: Printed Wiring Board -Relay Section

    CDX-MP50 3-12. PRINTED WIRING BOARD — RELAY SECTION — • Refer to page 18 for Circuit Boards Location. (Page 30) LED931 R932 CNP902 R931 R930 LED930 S931 FMA3 (Page 26)

  • Page 30: Printed Wiring Board -Display Section

    CDX-MP50 3-13. PRINTED WIRING BOARD — DISPLAY SECTION — • Refer to page 18 for Circuit Boards Location. LSW913 S901 LSW903 LSW904 LSW911 LED911 LED902 LED903 LED905 LED904 LED906 LCD901 S902 LED910 LSW906 IC951 S903 LSW912 LSW905 LSW902 LSW901 LSW917...

  • Page 31: Schematic Diagram -Display Section

    CDX-MP50 3-14. SCHEMATIC DIAGRAM — DISPLAY SECTION — R951 R972 R974 R976 R978 R980 R982 R966 R967 R940 R941 LSW901(2/2) LSW914(2/2) LSW910(2/2) LSW905(2/2) LSW902(2/2) C951 IC951 LED910 LED911 LED906 LSW915(2/2) LSW912(2/2) LSW909(2/2) LSW906(2/2) LED904 R952 C954 R958 IC901 C956 R962...

  • Page 32: Ic Block Diagrams

    CDX-MP50 3-15. IC BLOCK DIAGRAMS IC1 µPD63711GC-8EU (SERVO Board) IC2 BA5810FP-E2 (SERVO Board) IC12 TC7SH08FU-TE85R (SERVO Board) BIAS 71 70 IN B LOADING PRE OPIN4+ IN A FWD REV – OPIN4– MICROCOMPUTER INTERFACE AGCI 50 C2D3 LDCONT COMPARATOR 49 C2D2...
  • Page 33 CDX-MP50 IC401 BD3802F (MAIN Board) OUT- OUT- OUT- OUT- D-GND MUTE DS32 DS22 DS12 FADER FADER FADER FADER (0~-58, (0~-58, (0~-58, (0~-58, C BUS -∞dB) -∞dB) -∞dB) -∞dB) LOGIC EFFECT (OFF,6dB, EFFECT (OFF,6dB, 10dB,14dB) 10dB,14dB) TONE TONE PASS PASS BASS,TREBLE, MIDDLE...

  • Page 34: Exploded Views

    CDX-MP50 SECTION 4 EXPLODED VIEWS NOTE: • The mechanical parts with no reference • Color Indication of Appearance Parts The components identified by mark 0 or dotted line with mark number in the exploded views are not supplied. Example : 0 are critical for safety.

  • Page 35: Front Panel Section

    CDX-MP50 4-2. FRONT PANEL SECTION not supplied (DISPLAY board) not supplied not supplied LCD901 not supplied not supplied not supplied not supplied supplied supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3337-671-A OVERALL ASSY, FRONT PANEL...

  • Page 36: Cd Mechanism Section (1)

    CDX-MP50 4-3. CD MECHANISM SECTION (1) (MG-393MC-121) M903 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3274-253-A DISC IN SW BOARD, COMPLETE 3-221-779-02 BRACKET (MOTOR) 3-040-039-03 CHASSIS (T) 3-040-034-01 SPRING (RA), TENSION 3-040-038-01 SPRING (LR), TENSION...

  • Page 37: Cd Mechanism Section (2)

    CDX-MP50 4-4. CD MECHANISM SECTION (2) (MG-393MC-121) not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-040-025-02 ARM, CHUCKING 3-040-033-01 SPRING (KF1), TENSION 3-040-031-01 DAMPER (T) A-3307-422-A CHASSIS (M) COMPLETE ASSY 3-040-056-01 LEVER (D) 3-040-059-01 SPRING (TR), TENSION...

  • Page 38: Cd Mechanism Section (3)

    CDX-MP50 4-5. CD MECHANISM SECTION (3) (MG-393MC-121) not supplied M902 The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No.

  • Page 39: Electrical Parts List

    CDX-MP50 SECTION 5 DISC IN SW DISPLAY ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in • Items marked “*” are not stocked since The components identified by mark 0 or dotted line with mark the parts list may be different from the they are seldom required for routine service.
  • Page 40 CDX-MP50 DISPLAY LIMIT SW LOAD SW MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R943 1-216-817-11 METAL CHIP 1/10W C201 1-136-154-00 FILM 0.012uF R951 1-216-815-11 METAL CHIP 1/10W C202 1-162-965-11 CERAMIC CHIP 0.0015uF 10% R952 1-216-825-11 METAL CHIP 2.2K...
  • Page 41 CDX-MP50 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C803 1-162-970-11 CERAMIC CHIP 0.01uF D813 8-719-978-33 DIODE DTZ-TT11-6.8B C804 1-126-940-11 ELECT 330uF D814 8-719-978-33 DIODE DTZ-TT11-6.8B C805 1-162-970-11 CERAMIC CHIP 0.01uF D815 8-719-978-33 DIODE DTZ-TT11-6.8B C806 1-128-647-11 DOUBLE LAYERS 0.1F...
  • Page 42 CDX-MP50 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark JR909 1-216-864-11 METAL CHIP 1/10W R202 1-216-833-11 METAL CHIP 1/10W L701 1-216-864-11 METAL CHIP 1/10W R203 1-216-825-11 METAL CHIP 2.2K 1/10W R204 1-216-825-11 METAL CHIP 2.2K 1/10W <...
  • Page 43 CDX-MP50 MAIN RELAY SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R830 1-216-809-11 METAL CHIP 1/10W RELAY BOARD R831 1-216-845-11 METAL CHIP 100K 1/10W ************ R832 1-216-845-11 METAL CHIP 100K 1/10W R833 1-216-821-11 METAL CHIP...
  • Page 44 CDX-MP50 SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-125-837-11 CERAMIC CHIP 6.3V 8-759-491-50 IC TC74VHCT244AFT(EL) 1-162-964-11 CERAMIC CHIP 0.001uF IC12 8-759-196-96 IC TC7SH08FU-TE85R 1-162-970-11 CERAMIC CHIP 0.01uF 1-125-837-11 CERAMIC CHIP 6.3V < JUMPER RESISTOR >...
  • Page 45 CDX-MP50 SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-809-11 METAL CHIP 1/10W R148 1-216-809-11 METAL CHIP 1/10W 1-216-809-11 METAL CHIP 1/10W R149 1-216-814-11 METAL CHIP 1/10W 1-216-809-11 METAL CHIP 1/10W R150 1-216-821-11 METAL CHIP...
  • Page 46 CDX-MP50 Ref. No. Part No. Description Remark PARTS FOR INSTALLATION AND CONNECTIONS *************************************** X-3382-647-1 FRAME ASSY, FITTING X-3366-405-1 SCREW ASSY (EXP), FITTING 3-246-035-01 COLLAR 3-934-325-01 SCREW (+K 5X8 TP) 1-776-207-82 CORD (WITH CONNECTOR) (POWER) 3-246-471-01 KEY (FRAME)
  • Page 47 CDX-MP50 MEMO...
  • Page 48 CDX-MP50 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. Date Description of Revision...

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