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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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Summary of Contents for Sony CDX-C4840R

  • 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: Ic Pin Description

    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 3 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 4 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 5 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 6 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 7 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 8: 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 9: 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 10 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 11 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 12 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...

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Cdx-c4850r