Sony CDX-C4840R Service Manual
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Sony CDX-C4840R Service Manual

Sony CDX-C4840R Service Manual

Fm/mw/lw compact disc player
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CDX-C4840R/C4850R
SERVICE MANUAL
CD player section
System
Compact disc digital audio
system
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
Usable sensitivity
12 dBf
Selectivity
75 dB at 400 kHz
Signal-to-noise ratio
65 dB (stereo),
68 dB (mono)
Harmonic distortion at 1 kHz
0.8% (stereo),
0.6% (mono)
Separation
35 dB at 1 kHz
Frequency response
30 – 15,000 Hz
MW/LW
Tuning range
MW: 531 – 1,602 kHz
LW: 153 – 281 kHz
Aerial terminal
External aerial connector
Intermediate frequency 10.7 MHz / 450 kHz
MW: 30 µV
Sensitivity
LW: 50 µV
MICROFILM
Photo: CDX-C4850R
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
Power amplifier section
Outputs
Speaker impedance
Maximum power output 40 W × 4 (at 4 ohms)
General
Outputs
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
– 1 –
AEP Model
UK Model
CDX-C570R/C580R
MG-363T-121
KSS-521A
Speaker outputs
(sure seal connectors)
4 – 8 ohms
Line outputs (2) (CDX-C4850R)
Line output (1) (CDX-C4840R)
Power aerial relay control
lead
Power amplifier control
lead
Telephone ATT control
lead (CDX-C4850R)
Bass ±8 dB at 100 Hz
Treble ±8 dB at 10 kHz
12 V DC car battery
(negative ground)
Approx. 178 × 50 × 185 mm
(w/h/d)
Approx. 182 × 53 × 162 mm
(w/h/d)
Approx. 1.2 kg
Parts for installation and
connections (1 set)
Front panel case (1)

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  • Page 1 10 – 20,000 Hz Wow and flutter Below measurable limit General Tuner section Outputs Line outputs (2) (CDX-C4850R) Line output (1) (CDX-C4840R) Tuning range 87.5 – 108.0 MHz Power aerial relay control Aerial terminal External aerial connector lead Intermediate frequency 10.7 MHz...
  • Page 2 COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! 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: Table Of Contents

    TABLE OF CONTENTS 1. GENERAL Location of controls ..............4 Getting Started ................. 4 Setting the clock ..............4 CD Player ................4 Radio ..................5 RDS ..................5 Other Functions ............... 7 CD/MD Unit ................8 Connections ................10 2.
  • Page 4 SECTION 1 GENERAL This section is extracted from instruction manual. – 4 –...
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  • Page 12: Cover

    SECTION 2 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 2-1. COVER 1 claw 4 cover 3 claws 2 claw 2-2. FRONT PANEL ASSY 2 front panel assy 1 button (release) – 12 –...

  • Page 13: Sub Panel (1) Assy

    2-3. SUB PANEL (1) ASSY 5 claw 6 sub panel (1) assy 1 PTT 2.6x6 4 claw 2 PTT 2.6x6 3 PTT 2.6x6 2-4. CD MECHANISM BLOCK 2 PTT 2.6x6 7 PTT 2.6x6 8 bracket (M/D) 3 PTT 2.6x6 5 CD mechanism block 6 PTT 2.6x6 4 CNP700 1 PTT 2.6x6...

  • Page 14: Main Board

    2-5. MAIN BOARD 6 MAIN board 4 ground point screws (PTT 2.6x6) 5 ground point screw (PTT 2.6x6) 3 PTT 2.6x8 2 PTT 2.6x8 1 PTT 2.6x8 2-6. HEAT SINK 5 heat sink 4 PTT 2.6x8 3 PTT 2.6x8 (C4850R) 2 PTT 2.6x12 1 PTT 2.6x8 –...

  • Page 15: Chassis (T) Sub Assy

    2-7. CHASSIS (T) SUB ASSY 5 chassis (T) sub assy 1 P 2x3 2 P 2x3 3 P 2x3 4 claw 2-8. LEVER ASSY 5 guide (disc) 6 lever (R) assy 3 tension spring (LR) 7 lever (L) assy 1 PS 2x4 2 DISC IN SW board 4 claws –...

  • Page 16: Servo Board

    2-9. SERVO BOARD 6 PS 2x4 5 PS 2x4 2 CN2 1 CN3 3 P 2x3 7 SERVO board 4 loading motor assy 2-10. ROLLER ASSY • When installing, take note of the positions arm (roller) and washers. (Fig. 1) washer arm washer washers Fig.

  • Page 17: Chassis (Op) (O/S) Assy

    2-11. CHASSIS (OP) (O/S) ASSY 7 chassis (OP) (O/S) assy 8 compression spring (FL) 1 tension spring (angle) 9 compression spring (FL) 2 tension spring (KR1) 5 Fit lever (D) in the direction of the arrow. 6 Turn loading ring in the direction of the arrow.

  • Page 18: Electrical Adjustments

    SECTION 3 ELECTRICAL ADJUSTMENTS 0 dB = 1 µV FM Auto Scan/Stop Level Adjustment TUNER SECTION Setting : D-BASS switch : OFF Cautions during repair SOURCE button : FM When the tuner unit is defective, replace it by a new one because its internal block is difficult to repair.
  • Page 19 FM Stereo Separation Adjustment FM RDS S-Meter Adjustment Setting : Setting : D-BASS switch : OFF D-BASS switch : OFF SOURCE button : FM SOURCE button : FM FM RF signal FM RF signal generator generator level meter antenna antenna terminal 10 k Ω...
  • Page 20 MW Auto Scan/Stop Level Adjustment Adjustment Location : tuner unit (TU601) Setting : D-BASS switch : OFF SOURCE n MODE button : MW 30 Ω 15 pF 65 pF AM RF signal generator AM dummy antenna (50 Ω ) TU601 antenna Carrier frequency : 999 kHz terminal...

  • Page 21: Cd Section

    Focus Gain Adjustment (Coarse adjustment) CD SECTION This adjustment is not required unless the following parts are replaced: • Optical pick-up Note: • 1. CD Block basically constructed to operate without adjustment. Therefore, check each item in order given. Procedure: 2.

  • Page 22: Diagrams

    SECTION 4 DIAGRAMS 4-1. IC PIN DESCRIPTION • IC801 MB90574APMT-G-199-BND (SYSTEM CONTROL) Pin No. Pin Name Pin Description LD ON Laser ON/OFF control output Focus OK signal detection input XLAT25 CD signal processing latch output DATA25 CD signal serial data output XRST Reset output to CD signal processor IC.
  • Page 23 Pin No. Pin Name Pin Description Pin No. Pin Name Pin Description AMP ON Power amplifier power control output ANT REM ANT REMOTE power control output TXT ON Reset output to CD-TEXT decoder IC. — Not used. (Open) VOL ATT Electric volume mute control output CTL2 —...

  • Page 24: Block Diagram -Cd Section

    CDX-C4840R/C4850R 4-2. BLOCK DIAGRAM — CD SECTION — OPTICAL PICK-UP RF AMP, SERVO CONTROL DIGITAL SIGNAL PROESSOR D/A CONVERTER KSS-521A IC702 RF 0 PCMD V OUTL CD L-CH TUNER SECTION BCKIN R-CH CLKO V OUTR (Page 27) XLTO LRCK LRCIN...

  • Page 25: Block Diagram -Tuner Section

    CDX-C4840R/C4850R 4-3. BLOCK DIAGRAM — TUNER SECTION — PJ400 –1 ELECTRONIC R-CH BUS AUDIO IN (Page 26) VOLUME CDX-C4850R IC401 –2 PJ400 –3 SECTION OUT FL FRONT –4 TUNER UNIT R-CH CD L-CH MUTE TU601 Q110 LINE OUT CNJ600 ANT AM (ANTENNA) –5...

  • Page 26: Block Diagram -Display Section

    CDX-C4840R/C4850R 4-4. BLOCK DIAGRAM — DISPLAY SECTION — SYSTEM CONTROL LCD DRIVE IC801 (3/3) IC501 RESET BU5V RESET IC902 LCD501 S900 RESET COLOR GREEN 2 SELECT Q504 LED501-505, LSW511-529 COLOR AMBER 3 SELECT Q503 D910 BACK-UP BATT CHECK Q906 BUS INTERFACE...
  • Page 27 • Waveforms (MODE:PLAY) 4-5. 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: • All capacitors are in µF unless otherwise noted. pF: µµF SUB board Approx.

  • Page 28: Printed Wiring Boards -Cd Mechanism Section

    CDX-C4840R/C4850R 4-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION — • Semiconductor Location Ref. No. Location (Page 39) M902 M901 (SLED) (SPINDLE) – 33 – – 34 –...

  • Page 29: Schematic Diagram -Cd Mechanism Section

    CDX-C4840R/C4850R 4-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 32 for Waveforms. • Refer to page 51 for IC Block Diagrams. Note: • Voltage and waveforms are dc with respect to ground under no-signal conditions. no mark : CD PLAY ∗...

  • Page 30: Printed Wiring Board -Main Section

    CDX-C4840R/C4850R 4-8. PRINTED WIRING BOARD — MAIN SECTION — • Semiconductor Location Ref. No. Location Ref. No. Location (D402) IC401 D403 IC601 (D404) IC602 (D405) IC603 (D406) (IC702) F-11 (D407) IC703 IC801 (D408) (D409) IC803 D-14 (D410) (IC901) F-13 (IC902)
  • Page 31 CDX-C4840R/C4850R C4850R (Page 50) (Page 33) – 39 – – 40 –...

  • Page 32: Schematic Diagram -Main Section (1/3)

    CDX-C4840R/C4850R 4-9. SCHEMATIC DIAGRAM — MAIN SECTION (1/3) — • Refer to page 53 for IC Block Diagrams. C4850R (Page 44) (Page 46) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ) : MW <...

  • Page 33: Schematic Diagram -Main Section (2/3)

    CDX-C4840R/C4850R 4-10. SCHEMATIC DIAGRAM — MAIN SECTION (2/3) — • Refer to page 51 for IC Block Diagrams. (Page 41) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ) : MW <...

  • Page 34: Schematic Diagram -Main Section (3/3)

    CDX-C4840R/C4850R 4-11. SCHEMATIC DIAGRAM — MAIN SECTION (3/3) — • Refer to page 53 for IC Block Diagrams. (Page 42) (Page 47) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ) : MW <...

  • Page 35: Schematic Diagram -Display Section

    CDX-C4840R/C4850R 4-12. SCHEMATIC DIAGRAM — DISPLAY SECTION — (Page 46) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM – 47 – – 48 –...

  • Page 36: Printed Wiring Board -Display Section

    CDX-C4840R/C4850R 4-13. PRINTED WIRING BOARD — DISPLAY SECTION — • Semiconductor Location Ref. No. Location Ref. No. Location (D501) B-10 LED502 (D502) B-12 LED503 (D503) B-10 LED504 (D506) B-11 LED505 (D507) C-10 (D508) C-10 (Q502) B-13 (Q503) (IC501) (Q504) (Q505)

  • Page 37: Ic Block Diagrams

    • IC Block Diagrams IC1 CXD2507AQ IC602 SAA6588T-118 IIC-BUS PSWN SLAVE TRANSCEIVER SERVO AUTO SIGNAL SEQUENCER DATA PAUSE INTERFACE QUALITY DETECTOR REGISTER XRST AFIN DETECTOR SENS SUB CODE MUTE PROCESSOR INTERFACE DAVN CLOCKED RDS/RDBS RDS/RDBS SQCK DIGITAL COMPARATOR DEMODULATOR DECODER VDDA VDDD SQSO...
  • Page 38 IC2 CXA1782BQ 27 26 25 LEVEL S MIRR SENS RF IV AMP1 DFCT C.OUT XRST RF IV AMP2 FE BIAS IIL DATA REGISTER INPUT SHIFT REGISTER DATA ADDRESS DECODER OUTPUT DECODER TOG1-3 FS1-4 TG1-2 TM1-7 PS1-4 F IV AMP BAL1-3 FZC COMP E IV AMP TE AMP...
  • Page 39 IC401 TDA7462 SE3L SE3R MUTE PAUSE PAUSE DETECT FRONT INPUT TREBLE/ OUT FL LOUDNESS VOICE BANDPASS VOLUME FADER GAIN & SOFT BASS CONTROL CONTROL SE1L AUTO MUTE CONTROL CIRCUIT CIRCUIT SE1R ZERO CIRCUIT FRONT MD– OUT FR FADER CDL+ CDL– COMPANDER CDR–...
  • Page 40 IC601 TDA7427AD1TR LPOUT VDD1 VDD2 LP FM SWITCH CHARGE PHASE 11 BIT PROG LP1/LP2 GND AM PUMP COMP COUNTER LP HC LP AM SWITCH SWITCH SWM/DIR SWM/DIR V REF AM IN SWITCH AM/FM INLOCK 6 BIT PROG PRE COUNTER DETECTOR COUNTER :32/33 FM IN...

  • Page 41: Exploded Views

    SECTION 5 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. Example : mark ! or dotted line with mark. • Items marked “*” are not stocked since ! are critical for safety.

  • Page 42: Front Panel Section

    5-2. FRONT PANEL SECTION not supplied (DISPLAY board) LCD501 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-030-999-01 BUTTON (RELEASE) 3-030-852-01 RING 3-935-119-01 SPRING (RELEASE) * 62 3-030-994-01 BRACKET (LCD) 3-030-854-01 LEVER (SEEK/AMS) (C4850R) * 63 3-032-289-01 SHEET (DIFFUSION 5) 3-030-854-11 LEVER (SEEK/AMS) (C4840R) * 64...

  • Page 43: Cd Mechanism Section (1)

    5-3. CD MECHANISM SECTION (1) (MG-363T-121) M903 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 101 1-659-836-11 DISC IN SW BOARD 3-931-902-04 ARM (ROLLER) * 102 A-3291-816-B CHASSIS (T) SUB ASSY 3-936-756-01 ROLLER (D) 3-931-909-01 SPRING (LR), TENSION 3-321-393-01 WASHER, STOPPER X-3371-501-1 LEVER (L) ASSY * 113...

  • Page 44: Cd Mechanism Section (2)

    5-4. CD MECHANISM SECTION (2) (MG-363T-121) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-931-893-01 ARM, CHUCKING A-3277-802-C CHASSIS (M) ASSY 3-931-897-01 DAMPER (T) 3-939-883-01 SPRING (TR), TENSION 3-931-879-02 LEVER (D) 3-931-881-01 LEVER (LOCK) * 154 3-913-404-11 RETAINER (DISC) 3-931-882-02 GEAR (MDL) 3-931-894-01 BRACKET (CP)

  • Page 45: Cd Mechanism Section (3)

    5-5. CD MECHANISM SECTION (3) (MG-363T-121) M901 M902 The components identified by mark ! or dotted line with mark. ! are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 201...

  • Page 46: Electrical Parts List

    SECTION 6 DISC IN SW DISPLAY ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in • Items marked “*” are not stocked since The components identified by the parts list may be different from the they are seldom required for routine service. mark ! or dotted line with mark.
  • Page 47 DISPLAY LIMIT SW LOAD SW MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R512 1-216-043-00 METAL CHIP 1/10W 1-659-835-12 LIMIT SW BOARD R513 1-216-045-00 METAL CHIP 1/10W *************** R514 1-216-049-11 RES,CHIP 1/10W R515 1-216-053-00 METAL CHIP 1.5K 1/10W <...
  • Page 48 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C404 1-163-809-11 CERAMIC CHIP 0.047uF C651 1-163-009-11 CERAMIC CHIP 0.001uF C406 1-124-234-00 ELECT 22uF C653 1-163-251-11 CERAMIC CHIP 100PF C407 1-164-346-11 CERAMIC CHIP C654 1-163-251-11 CERAMIC CHIP 100PF C408 1-164-346-11 CERAMIC CHIP...
  • Page 49 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C923 1-124-465-00 ELECT 0.47uF D901 8-719-200-82 DIODE 11ES2 C926 1-163-038-00 CERAMIC CHIP 0.1uF D902 8-719-200-82 DIODE 11ES2 C930 1-164-004-11 CERAMIC CHIP 0.1uF D903 8-719-049-38 DIODE 1N5404TU C931 1-164-004-11 CERAMIC CHIP 0.1uF D904...
  • Page 50 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark JR765 1-216-295-00 SHORT Q925 8-729-901-00 TRANSISTOR DTC124EK JR855 1-216-295-00 SHORT Q940 8-729-620-06 TRANSISTOR 2SC3052-EF JR857 1-216-295-00 SHORT < RESISTOR > < COIL > R101 1-216-057-00 METAL CHIP 2.2K 1/10W L601...
  • Page 51 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R606 1-216-073-00 METAL CHIP 1/10W R806 1-216-049-11 RES,CHIP 1/10W R607 1-216-097-00 RES,CHIP 100K 1/10W R807 1-216-049-11 RES,CHIP 1/10W R608 1-216-025-00 RES,CHIP 1/10W R808 1-216-049-11 RES,CHIP 1/10W R609 1-216-081-00 METAL CHIP 1/10W R809...
  • Page 52 MAIN SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R911 1-216-041-00 METAL CHIP 1/10W 1-164-004-11 CERAMIC CHIP 0.1uF R915 1-216-079-00 METAL CHIP 1/10W 1-164-004-11 CERAMIC CHIP 0.1uF R917 1-216-085-00 METAL CHIP 1/10W 1-163-037-11 CERAMIC CHIP 0.022uF R918 1-216-073-00 METAL CHIP...
  • Page 53 SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark JR19 1-216-296-00 SHORT < COIL > JR20 1-216-296-00 SHORT JR21 1-216-296-00 SHORT 1-412-058-11 INDUCTOR CHIP 10uH JR22 1-216-296-00 SHORT 1-412-058-11 INDUCTOR CHIP 10uH JR23 1-216-296-00 SHORT 1-412-058-11 INDUCTOR CHIP 10uH JR24 1-216-296-00 SHORT <...
  • Page 54 SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-085-00 METAL CHIP 1/10W ACCESSORIES & PACKING MATERIALS 1-216-081-00 METAL CHIP 1/10W ******************************** 1-216-097-00 RES,CHIP 100K 1/10W 1-216-105-00 RES,CHIP 220K 1/10W 3-865-874-11 MANUAL, INSTRUCTION (ENGLISH,SPANISH, 1-216-073-00 METAL CHIP 1/10W PORTUGUESE,SWEDISH)(AEP,UK) 3-865-874-21 MANUAL, INSTRUCTION (FRENCH,GERMAN,...
  • Page 55 Ref. No. Part No. Description Remark PARTS FOR INSTALLATION AND CONNECTIONS *************************************** 3-011-653-01 FRAME X-3374-928-1 COLLAR ASSY 3-034-262-01 SCREW, FITTING * 254 3-358-697-01 BUSHING 3-909-731-01 KEY 1-776-527-51 CORD (WITH CONNECTOR) (ISO) (POWER) (C4840R) 1-776-527-61 CORD (WITH CONNECTOR) (ISO) (POWER) (C4850R) 1-465-459-11 ADAPTOR, ANTENNA –...
  • Page 56 CDX-C4840R/C4850R Sony Corporation 99C047542-1 9-926-458-11 Personal & Mobile Communication Company Printed in Hungary C1999. 3 – 70 – Published by Quality Assurance Dept.

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