Sony CDX-L280 Service Manual
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Sony CDX-L280 Service Manual

Sony CDX-L280 Service Manual

Fm/am compact disc player
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SERVICE MANUAL
Ver 1.0 2002. 11
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 MHz
Aerial terminal
External aerial connector
Intermediate frequency 10.7 MHz
Usable sensitivity
11 dBf
Selectivity
75 dB at 400 kHz
Signal-to-noise ratio
65 dB (stereo),
68 dB (mono)
Harmonic distortion at 1 kHz
0.7% (stereo),
0.5% (mono)
Separation
33 dB at 1 kHz
Frequency response
30 – 15,000 Hz
AM
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)
Sony Corporation
9-874-228-01
2002K0400-1
e Vehicle Company
© 2002. 11
Published by Sony Engineering Corporation
CDX-L280
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
General
Outputs
Tone controls
Power requirements
Dimensions
Mounting dimensions
Mass
Supplied accessories
Note
This unit cannot be connected to a digital
preamplifier or an equalizer.
Design and specifications are subject to change without
notice.
FM/AM COMPACT DISC PLAYER
AEP Model
UK Model
NEW
MG-393XC-121//K
KSS-721A
Audio outputs (rear)
Power amplifier control terminal
Power aerial relay control terminal
Bass ±9 dB at 100 Hz
Treble ±9 dB at 10 kHz
12 V DC car battery
(negative ground)
Approx. 178 × 50 × 176 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)
1

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  • Page 1 Speaker outputs (sure seal connectors) Speaker impedance 4 – 8 ohms Maximum power output 45 W × 4 (at 4 ohms) FM/AM COMPACT DISC PLAYER Sony Corporation 9-874-228-01 2002K0400-1 e Vehicle Company © 2002. 11 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-L280 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 •...

  • Page 4: Table Of Contents

    CDX-L280 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) Sub Assy ............9 2-6.
  • Page 5 CDX-L280 SECTION 1 GENERAL This section is extracted from instruction manual.
  • Page 6 CDX-L280...

  • Page 7: Disassembly

    CDX-L280 SECTION 2 DISASSEMBLY Note : This set can be disassemble according to the following sequence. 2-5. CHASSIS (T) SUB ASSY (Page 9) 2-1. SUB PANEL ASSY 2-6. LEVER SECTION 2-7. SERVO BOARD (Page 7) (Page 10) (Page 10) 2-2.

  • Page 8: Cd Mechanism Block

    CDX-L280 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-L280 2-4. HEAT SINK 6 heat sink 5 PTT 2.6x8 4 PTT 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 1 Unsolder the 4 chassis (T) sub assy lead wires.

  • Page 10: Lever Section

    CDX-L280 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 4 claws 2-7. SERVO BOARD 8 SERVO board 7 special screw 6 special screws 2 Removal the solders.

  • Page 11: Shaft Roller Assy

    CDX-L280 2-8. SHAFT ROLLER ASSY • When installing, take note of the positions arm (roller) and washers. (Fig. 1) 3 retaing ring (RA) shaft retainer (roller) washer 4 shaft retainer (roller) washer shaft retainer retaing ring (roller) (RA) Fig. 1...

  • Page 12: Optical Pick-Up Block

    CDX-L280 2-10. OPTICAL PICK-UP BLOCK 4 screw 1 P 2x3 5 plate spring (feed) 2 sled motor assy 3 optical pick-up block 6 shaft (feed) assy...

  • Page 13: Diagrams

    CDX-L280 SECTION 3 DIAGRAMS 3-1. IC PIN DESCRIPTION • IC801 µPD780024AGK-C08-9ET (SYSTEM CONTROLLER) Pin No. Pin Name Pin Description D SW Down switch detection input IN SW Disc in switch detection input PH3 detection input (Not used in this set)
  • Page 14 CDX-L280 Pin No. Pin Name Pin Description P.ON System power supply control output X SO CD DSP IC serial data output X SI CD DSP IC serial data input X SCK CD DSP IC serial clock output RFOK CD servo IC RFOK signal input...

  • Page 15: Block Diagram -Cd Section

    CDX-L280 3-2. BLOCK DIAGRAM — CD SECTION — RF AMP,DIGITAL SERVO DIGITAL SIGNAL PROCESSOR OPTICAL PICK-UP KSS-721A (Page 16) MAIN SECTION LOUT SYSTEM CONTROL ROUT IC801(1/3) CONV R-CH DEMOD PACK TSTB DSUB CODE TSCK PROCESS CONV. X_SO FORCUS X_SI ERROR...

  • Page 16: Block Diagram -Tuner Section

    CDX-L280 3-3. BLOCK DIAGRAM — TUNER SECTION — PJ401 AUDIO OUT REAR R-CH POWER AMP ELECTRONIC VOLUME (Page 15) IC101 IC401 CNP501 LF OUT TUNER UNIT TU601 SECTION CNJ601 FM_ANT L-CH LR OUT (ANTENNA) R-CH R-CH Q102 Q101 16 AUX-IN...

  • Page 17: Block Diagram -Display Section

    CDX-L280 3-4. BLOCK DIAGRAM — DISPLAY SECTION — 3-5. CIRCUIT BOARDS LOCATION IN SELF SW board SYSTEM CONTROL LCD DRIVE SL SW board IC801 (3/3) IC551 KEY 0 KEY 0 KEY MATRIX SPEAKER board LCD DO DATA DATA S501-511, SEG1...

  • Page 18: Printed Wiring Boards -Cd Mechanism Section

    CDX-L280 3-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION — • Refer to page 17 for Circuit Boards Location. 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: •...
  • Page 19 CDX-L280 TP77 TP78 TP62 TP63 TP82 TP84 TP48 TP66 TP80 TP83 TP81 TP11 TP50 TP47 TP12 TP64 TP10 C9 C10 TP51 TP89 TP59 TP52 TP70 TP71 (Page 21) TP56 TP72 TP22 TP23 TP58 TP24 TP25 TP61 TP76 TP88 TP74 TP69...

  • Page 20: Schematic Diagram -Cd Mechanism Section

    CDX-L280 • Refer to page 17 for Waveforms. 3-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 26 for IC Block Diagrams. TP77 TP78 TP89 TP79 TP80 TP81 TP45 TP82 TP10 TP83 TP44 TP84 TP43 TP42 TP41...

  • Page 21: Printed Wiring Board -Main Section

    CDX-L280 3-8. PRINTED WIRING BOARD — MAIN SECTION — • Refer to page 17 for Circuit Boards Location. (12) C633 C615 (Page 19) • Semiconductor Location Ref. No. Location Ref. No. Location Ref. No. Location D401 D921 Q606 D402 D922...

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

    CDX-L280 3-9. SCHEMATIC DIAGRAM — MAIN SECTION (1/2) — • Refer to page 26 for IC Block Diagrams. PJ401 C105 C205 C401 D444 IC101 R105 R401 D922 R109 Q101 C201 C103 R107 R444 D921 D920 R108 C202 R206 C104 Q102...

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

    CDX-L280 3-10. SCHEMATIC DIAGRAM — MAIN SECTION (2/2) — • Refer to page 17 for Waveforms. (Page 22) L703 (Page C701 C847 C702 L701 C703 Q903 Q902 C704 L702 D906 R908 R704 R910 R705 R706 D907 C904 Q904 R909 R907...

  • Page 24: Printed Wiring Board -Display Section

    CDX-L280 3-11. PRINTED WIRING BOARD — DISPLAY SECTION — • Refer to page 17 for Circuit Boards Location. D570 D569 D568 D567 D574 D573 D572 D571 D578 D579 R568 R567 D575 R566 R570 D580 R569 D564 D561 R565 R571 R572...

  • Page 25: Schematic Diagram -Display Section

    CDX-L280 3-12. SCHEMATIC DIAGRAM — DISPLAY SECTION — R552 R553 D551 C552 C551 R551 R554 CNP551 D552 C555 C553 R555 D561 D564 D573 D575 D579 D572 PL551 CNP552 IC552 D562 D566 D574 D580 D571 R565 R571 D555 R566 JR502 R572...
  • Page 26 CDX-L280 • IC Block Diagrams IC1 µPD63711GC-8EU IC2 BA5810FP-E2 BIAS 71 70 LOADING PRE OPIN4+ FWD REV – OPIN4– MICROCOMPUTER INTERFACE AGCI 50 C2D3 LDCONT COMPARATOR 49 C2D2 POWER CD-TEXT DECODER OPOUT4 SAVE 48 C2D1 SUB-CODE PROCESSOR OPIN3+ MEMORY 47 C1D2 –...
  • Page 27 CDX-L280 IC401 LC75421M-TLM LROUT RROUT LFOUT RFOUT INTERFACE LFIN 32 RFIN ROUT LOUT LBASS2 RBASS2 CONTROL LOGIC CONTROL CIRCUIT CIRCUIT CIRCUIT LBASS1 10 RBASS1 LVREF RVREF LTRE 11 RTRE 26 RIN LSELO RSELO – – VREF...

  • Page 28: Exploded Views

    CDX-L280 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 29: Front Panel Section

    CDX-L280 4-2. FRONT PANEL SECTION not supplied (DISPLAY board) LCD501 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3382-770-1 PANEL SUB ASSY, FRONT * 61 3-224-609-03 PLATE (LCD), GROUND 3-224-605-21 BUTTON (SEEK/AMS) * 62 3-224-610-02 SHEET (LCD), DIFFUSION...

  • Page 30: Cd Mechanism Section (1)

    CDX-L280 4-3. CD MECHANISM SECTION (1) (MG-393CX-121//K) M903 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-040-050-01 LEVER (L) 3-040-040-03 ARM (ROLLER) 3-040-038-01 SPRING (LR), TENSION A-3283-233-A SERVO BOARD, COMPLETE 3-040-039-03 CHASSIS (T) 1-685-337-11 LOAD SW BOARD...

  • Page 31: Cd Mechanism Section (2)

    CDX-L280 4-4. CD MECHANISM SECTION (2) (MG-393CX-121//K) 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 32: Cd Mechanism Section (3)

    CDX-L280 4-5. CD MECHANISM SECTION (3) (MG-393CX-121//K) M901 (Supplied with 201) 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.

  • Page 33: Electrical Parts List

    CDX-L280 SECTION 5 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 34 CDX-L280 DISPLAY IN SELF SW LOAD SW MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R561 1-216-806-11 METAL CHIP 1/10W A-3274-620-A MAIN BOARD, COMPLETE (including R562 1-216-806-11 METAL CHIP 1/10W SPEAKER BOARD) R563 1-216-817-11 METAL CHIP...
  • Page 35 CDX-L280 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C618 1-162-964-11 CERAMIC CHIP 0.001uF < SURGE PROTECTOR > C619 1-162-964-11 CERAMIC CHIP 0.001uF C620 1-104-665-11 ELECT 100uF CP601 1-803-902-21 PROTECTOR CHIP, SURGE C621 1-104-396-11 ELECT...
  • Page 36 CDX-L280 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark L701 1-410-513-11 INDUCTOR 22uH R404 1-249-417-11 CARBON 1/4W L702 1-410-513-11 INDUCTOR 22uH R407 1-216-841-11 METAL CHIP 1/10W L703 1-410-513-11 INDUCTOR 22uH R408 1-218-867-11 METAL CHIP 6.8K...
  • Page 37 CDX-L280 MAIN SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R906 1-249-417-11 CARBON 1/4W 1-125-837-11 CERAMIC CHIP 6.3V R907 1-216-841-11 METAL CHIP 1/10W 1-162-970-11 CERAMIC CHIP 0.01uF R908 1-216-841-11 METAL CHIP 1/10W 1-162-970-11 CERAMIC CHIP 0.01uF...
  • Page 38 CDX-L280 SERVO SL SW SPEAKER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-797-11 METAL CHIP 1/10W PARTS FOR INSTALLATION AND CONNECTIONS 1-216-833-11 METAL CHIP 1/10W ************************************** 1-216-833-11 METAL CHIP 1/10W 3-014-370-22 FRAME, FITTING < VIBRATOR >...
  • Page 39 CDX-L280 MEMO...
  • Page 40 CDX-L280 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper on the revised page allows you to jump to the next revised page. Ver. Date Description of Revision 2002. 11...

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