Sony CDX-L550 Service Manual
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Sony CDX-L550 Service Manual

Fm/mw/lw compact disc player
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CDX-L550/L550V/L550X
SERVICE MANUAL
Ver 1.0 2001. 01
• 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
87.5 – 108.0 MHz
Aerial terminal
External aerial connector
Intermediate frequency 10.7 MHz/450 kHz
Usable sensitivity
8 dBf
Selectivity
75 dB at 400 kHz
Signal-to-noise ratio
66 dB (stereo),
72 dB (mono)
Harmonic distortion at 1 kHz
0.6% (stereo),
0.3% (mono)
Separation
35 dB at 1 kHz
Frequency response
30 – 15,000 Hz
MW/LW
Tuning range
MW: 531 – 1,602 kHz
LW: 153 – 279 kHz
Aerial terminal
External aerial connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity
MW: 30 µV
LW: 40 µV
Power amplifier section
Outputs
Speaker outputs
(sure seal connectors)
Speaker impedance
4 – 8 ohms
Maximum power output 50 W × 4 (at 4 ohms)
Sony Corporation
9-870-256-11
2001A0400-1
Audio Entertainment Group
© 2001. 1
General Engineering Dept.
Photo: CDX-L550X
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
General
Outputs
Inputs
Tone controls
Power requirements
Dimensions
Mounting dimension
Mass
Supplied accessories
Design and specifications are subject to change without
notice.
FM/MW/LW COMPACT DISC PLAYER
AEP Model
UK Model
CDX-L550/L550V/L550X
E Model
NEW
MG-393X-121//Q
KSS-720A
Audio outputs
Power aerial relay control
lead
Power amplifier control lead
Telephone ATT control lead
Remote controller input
connector
Aerial input connector
Bass ±8 dB at 100 Hz
Treble ±8 dB at 10 kHz
12 V DC car battery
(negative ground)
Approx. 178 × 50 × 177 mm
(w/h/d)
Approx. 182 × 53 × 161 mm
(w/h/d)
Approx. 1.2 kg
Parts for installation and
connections (1 set)
Front panel case (1)
CDX-L550
1

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Summary of Contents for Sony CDX-L550

  • Page 1 CDX-L550/L550V/L550X SERVICE MANUAL AEP Model UK Model Ver 1.0 2001. 01 CDX-L550/L550V/L550X E Model CDX-L550 Photo: CDX-L550X • The tuner and CD sections have no adjustments. Model Name Using Similar Mechanism CD Drive Mechanism Type MG-393X-121//Q Optical Pick-up Name KSS-720A...

  • Page 2: Table Of Contents

    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-L550/L550V/L550X SECTION 1 GENERAL This section is extracted from instruction manual.
  • Page 4 CDX-L550/L550V/L550X...
  • Page 5 CDX-L550/L550V/L550X...
  • Page 6 CDX-L550/L550V/L550X...
  • Page 7 CDX-L550/L550V/L550X...

  • Page 8: Disassembly

    CDX-L550/L550V/L550X SECTION 2 DISASSEMBLY • The equipment can be removed using the following procedure. 2-2. CD MECHANISM BLOCK 7 bracket (CD) Sub Panel Assy CD Mechanism Block Main Board Heat Sink Chassis (T.U) Assy Disc In Board, Guide (Disc) Arm Roller Assy 5 CD mechanism block 6 PTT 2.6x4...

  • Page 9: Heat Sink

    CDX-L550/L550V/L550X 2-4. HEAT SINK 4 heat sink 3 PTT 2.6x10 2 PTT 2.6x16 1 PTT 2.6x10 2-5. CHASSIS (T.U) ASSY 2 P 2x3 3 P 2x3 1 Unsolder the 4 chassis (T.U) assy lead wires. black white...

  • Page 10: Disc In Board, Guid (Disc)

    CDX-L550/L550V/L550X 2-6. DISC IN BOARD, GUIDE (DISC) 4 guide (disc) 3 tension spring (LR) 1 PS 2x3 2 DISC IN board 4 claws 2-7. SERVO BOARD 7 PS 2x4 8 PS 2x4 2 CN2 3 Removal the solders. 1 CN3...

  • Page 11: Arm Roller Assy

    CDX-L550/L550V/L550X 2-8. ARM ROLLER ASSY • When installing, take note of the positions bearing (roller) retaining ring (roller) arm (roller) and washers. (Fig. 1) bearing (roller) washer(RA) washer(RA) Fig. 1 2 arm roller assy 3 PS 2x3 4 LOAD board 1 tension spring (RA3) 2-9.

  • Page 12: Optical Pick-Up Block

    CDX-L550/L550V/L550X 2-10. OPTICAL PICK-UP BLOCK 1 P 2x3 2 sled motor assy (M902) 3 optical pick-up block...

  • Page 13: Diagrams

    Telephone attenuator detection input NCO (VCC) Not used. (Fixed at H in this set) UNISO SONY-BUS data output (Not used in this set) UNISI SONY-BUS data input (Not used in this set) UNICKO SONY-BUS clock output (Not used in this set)
  • Page 14 Not used. (Open) Key illumination 1 color/2 color select initial setting input COLSW (L: 1 COLOR, H: 2 COLOR) (Fixed at L: CDX-L550, H: CDX-L550V/L550X) COLSEL 1 color initial setting input (L: amber, H: green) (Fixed at L in this set)

  • Page 15: Block Diagram -Cd Section

    CDX-L550/L550V/L550X 3-2. BLOCK DIAGRAM — CD SECTION — RF AMP,DIGITAL SERVO DIGITAL SIGNAL PROCESSOR OPTICAL PICK-UP KSS-720A (Page 16) TUNER SECTION LOUT SYSTEM CONTROL ROUT IC501(1/3) CONV R-CH DEMOD PACK CD PACK DSUB CODE TSTB PROCESS TSTB CONV. CD TSO...

  • Page 16: Block Diagram -Tuner Section

    CDX-L550/L550V/L550X 3-3. BLOCK DIAGRAM — TUNER SECTION — PJ401–1, –2 PJ401–3, –4 AUDIO OUT REAR AUDIO OUT FRONT –1 –2 –3 –4 POWER AMP ELECTRONIC VOLUME IC404 (Page 15) IC401 CNP601 OUT FL FL– TUNER UNIT TU10 MD LCH SECTION...

  • Page 17: Block Diagram -Display Section

    CDX-L550/L550V/L550X 3-4. BLOCK DIAGRAM — DISPLAY SECTION — 3-5. CIRCUIT BOARDS LOCATION SYSTEM CONTROL LCD DRIVE IC501 (3/3) IC900 SUB board DISC IN board KEY MATRIX KEY IN0 LSW901-907,909-911 LCD SO DATA LCD901 LSW914-919, LCD CKO S902-907, KEY IN1 LCD CE...

  • Page 18: Printed Wiring Boards -Cd Mechanism Section

    CDX-L550/L550V/L550X 3-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION — THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) for schematic diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
  • Page 19 CDX-L550/L550V/L550X • Semiconductor Location Ref. No. Location (Page 21)

  • Page 20: Schematic Diagram -Cd Mechanism Section

    CDX-L550/L550V/L550X • Refer to page 17 for Waveforms. 3-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 29 for IC Block Diagrams. IC B/D (Page 22) IC B/D Note: • Voltage is dc with respect to ground under no-signal conditions.

  • Page 21: Printed Wiring Board -Main Section

    CDX-L550/L550V/L550X 3-8. PRINTED WIRING BOARD — MAIN SECTION — • Semiconductor Location Ref. No. Location Ref. No. Location D720 IC20 D331 H-13 IC51 D332 H-13 IC401 D341 IC404 D471 IC501 D472 IC601 F-13 D473 IC602 J-10 D474 D475 D476 A-10...

  • Page 22: Schematic Diagram -Main Section (1/2)

    CDX-L550/L550V/L550X • Refer to page 17 for Waveforms. 3-9. SCHEMATIC DIAGRAM — MAIN SECTION (1/2) — • Refer to page 29 for IC Block Diagrams. IC B/D IC B/D (Page 20) (Page 23) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition.

  • Page 23: Schematic Diagram -Main Section (2/2)

    CDX-L550/L550V/L550X 3-10. SCHEMATIC DIAGRAM — MAIN SECTION (2/2) — • Refer to page 29 for IC Block Diagrams. IC B/D (Page 22) (Page 25) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM...

  • Page 24: Printed Wiring Board -Sub (Cd) Section

    CDX-L550/L550V/L550X 3-11. PRINTED WIRING BOARD — SUB (CD) SECTION — (Page 21) (Page 27)

  • Page 25: Schematic Diagram -Sub (Cd) Section

    CDX-L550/L550V/L550X 3-12. SCHEMATIC DIAGRAM — SUB (CD) SECTION — (Page 26) (Page 23)

  • Page 26: Schematic Diagram -Key Section

    CDX-L550/L550V/L550X 3-13. SCHEMATIC DIAGRAM — KEY SECTION — (Page 25) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM...

  • Page 27: Printed Wiring Board -Key Section (L550/L550X)

    CDX-L550/L550V/L550X 3-14. PRINTED WIRING BOARD — KEY SECTION (L550/L550X) — • Semiconductor Location Ref. No. Location Ref. No. Location (D901) C-10 LED902 (D902) C-11 LED903 (D903) C-11 LED905 (Page 24) (D904) C-11 LED906 A-10 (D906) C-11 LED909 B-10 (D908) C-10...

  • Page 28: Printed Wiring Board -Key Section (L550V)

    CDX-L550/L550V/L550X 3-15. PRINTED WIRING BOARD — KEY SECTION (L550V) — • Semiconductor Location Ref. No. Location Ref. No. Location (D901) B-10 LED901 (D902) C-11 LED902 (Page 24) (D903) C-11 LED903 (D904) C-11 LED905 (D906) C-11 LED906 A-10 (D908) C-10 LED913...

  • Page 29: Ic Block Diagrams

    CDX-L550/L550V/L550X • IC Block Diagrams IC1 µPD63711GC-8EB 71 70 MICROCOMPUTER INTERFACE AGCI 50 C2D3 COMPARATOR 49 C2D2 CD-TEXT DECODER 48 C2D1 SUB-CODE PROCESSOR MEMORY 47 C1D2 SRAM PROCESSOR AUTO GAIN FD/TD/SD/MD 46 C1D1 CONTROLLER CONTROLLER AGND 45 DGND DIGITAL PLL...
  • Page 30 CDX-L550/L550V/L550X IC2 BA5810FP BIAS LOADING PRE OPIN4+ FWD REV – OPIN4– LDCONT POWER OPOUT4 SAVE OPIN3+ – OPIN3– PREVCC (PRE.LOADING) OPOUT3 PREVCC POWVCC12 (CH1.CH2) CH1-4 MUTE POWVCC MUTE POWVCC34 (CH3,CH4) VOL– POWVCC VOL+ – – VO2– VO3– LEVEL LEVEL SHIFT...
  • Page 31 CDX-L550/L550V/L550X IC401 TDA7406T 32 31 30 29 28 27 26 25 MIXER SOFT STEP SOFT STEP SOFT STEP MONO FADER FADER FADER FADER CREF SUPPLY SACLK WOOFER FILTER OUTPUT SELECTOR SWIN ACINR 17 ATT ACOUTR SWACOUT C-BUS QUAL. QUAL AC OUTL...

  • Page 32: Exploded Views

    CDX-L550/L550V/L550X SECTION 4 EXPLODED VIEWS NOTE: • The mechanical parts with no reference • Color Indication of Appearance Parts The components identified by number in the exploded views are not supplied. mark 0 or dotted line with mark. Example : •...

  • Page 33: Front Panel Section

    CDX-L550/L550V/L550X 4-2. FRONT PANEL SECTION LCD901 not supplied (KEY board) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-223-791-01 BUTTON (MENU/SOUND) 3-223-753-01 BUTTON (SOURCE/MODE) 3-223-789-11 BUTTON (DSPL/SCRL) 3-223-750-01 BUTTON (1-3) 3-223-792-01 BUTTON (AF/TA/OFF) 3-223-752-11 BUTTON (DSO/EQ7)

  • Page 34: Cd Mechanism Section (1)

    CDX-L550/L550V/L550X 4-3. CD MECHANISM SECTION (1) (MG-393X-121//Q) M903 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3315-247-A CHASSIS (T.U) ASSY * 107 A-3283-047-A SERVO BOARD, COMPLETE 3-931-909-01 SPRING (LR), TENSION 3-225-784-01 SPRING (RA3), TENSION * 103...

  • Page 35: Cd Mechanism Section (2)

    CDX-L550/L550V/L550X 4-4. CD MECHANISM SECTION (2) (MG-393X-121//Q) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3378-956-1 ARM ASSY, CHUCKING 3-220-180-01 SPRING (TR2), TENSION 3-931-897-61 DAMPER (T) 3-931-881-01 LEVER (LOCK) 3-039-627-01 LEVER (D) 3-931-882-02 GEAR (MDL) 3-040-165-01 RETAINER (DISC)

  • Page 36: Cd Mechanism Section (3)

    CDX-L550/L550V/L550X 4-5. CD MECHANISM SECTION (3) (MG-393X-121//Q) M901 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. Part No.

  • Page 37: Electrical Parts List

    CDX-L550/L550V/L550X SECTION 5 DISC IN 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 38 CDX-L550/L550V/L550X Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark LSW904 1-786-112-11 SWITCH, KEYBOARD (WITH LED) (MODE) R907 1-216-823-11 METAL CHIP 1.5K 1/16W (L550) R908 1-216-825-11 METAL CHIP 2.2K 1/16W LSW905 1-771-476-11 SWITCH, KEYBOARD (WITH LED) (SOUND)
  • Page 39 CDX-L550/L550V/L550X LIMIT LOAD MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R945 1-216-029-00 METAL CHIP 1/10W < ROTARY ENCODER > R946 1-216-029-00 METAL CHIP 1/10W (L550) RE901 1-476-507-11 ENCODER, ROTARY R946 1-216-031-00 METAL CHIP 1/10W (L550V/L550X) <...
  • Page 40 CDX-L550/L550V/L550X MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-107-823-11 CERAMIC CHIP 0.47uF C454 1-164-161-11 CERAMIC CHIP 0.0022uF 10% 100V 1-163-809-11 CERAMIC CHIP 0.047uF C455 1-163-251-11 CERAMIC CHIP 100PF 1-163-038-11 CERAMIC CHIP 0.1uF C460 1-163-251-11 CERAMIC CHIP...
  • Page 41 CDX-L550/L550V/L550X MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D474 8-719-081-83 DIODE CRG01(TE85L) < JACK > D475 8-719-081-83 DIODE CRG01(TE85L) D476 8-719-081-83 DIODE CRG01(TE85L) PJ401 1-774-699-12 JACK, PIN 4P (AUDIO OUT FRONT/REAR) D477 8-719-081-83 DIODE CRG01(TE85L)
  • Page 42 CDX-L550/L550V/L550X MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R431 1-216-033-00 METAL CHIP 1/10W R541 1-216-097-11 RES-CHIP 100K 1/10W R432 1-216-089-11 RES-CHIP 1/10W R544 1-216-097-11 RES-CHIP 100K 1/10W R433 1-216-025-11 RES-CHIP 1/10W R551 1-216-049-11 RES-CHIP...
  • Page 43 CDX-L550/L550V/L550X MAIN SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < VIBRATOR > 1-770-347-21 CONNECTOR, FPC 6P 1-579-242-41 VIBRATOR, CRYSTAL (4.332MHz) < JUMPER RESISTOR > X501 1-795-165-11 VIBRATOR, CERAMIC (18.43MHz) X502 1-567-098-41 VIBRATOR, CRYSTAL (32.768kHz)
  • Page 44 CDX-L550/L550V/L550X SUB (CD) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-680-762-11 SUB (CD) BOARD ************** HARDWARE LIST ************** ************** 3-039-443-11 SHEET (CONNECTOR) 7-685-790-01 SCREW +PTT 2.6X4 (S) < CONNECTOR > 7-685-792-09 SCREW +PTT 2.6X6 (S)
  • Page 45 CDX-L550/L550V/L550X 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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