Sony CDX-M620 - Fm/am Compact Disc Player Manuale utente

Ver 1.0 2001. 03

Model Name Using Similar Mechanism CDX-M700R/M750

CD Drive Mechanism Type MG-383Z-121//K

Optical Pick-up Name KSS-720A

SERVICE MANUAL

US Model

CDX-M620/M670

AEP Model

UK Model

E Model

CDX-M670

CDX-M620

• The tuner and CD sections have no adjustments.

AUDIO POWER SPECIFICATIONS (US MODEL)

POWER OUTPUTAND TOTAL HARMONIC DISTORTION

23.2 watts per channel minimum continuous average power into

4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more

than 5% total harmonic distortion.

CD player section

Signal-to-noise ratio 90 dB

Frequency response 10 – 20,000 Hz

Wow and flutter Below measurable limit

Laser Diode Properties (US model)

Material GaAlAs

Wavelength 780 nm

Emission Duration Continuous

Laser output power Less than 44.6 µW*

*This output is the value measured at a distance

of 200 mm from the objective lens surface on the

Optical Pick-up Block.

Tuner section

Tuning range 87.5 – 107.9 MHz (US model)

87.5 – 108.0 MHz (AEP, UK, E model)

Antenna terminal External antenna 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

AM (US model)

Tuning range 530 – 1,710 kHz

Antenna terminal External antenna connector

Intermediate frequency 10.7 MHz/450 kHz

Sensitivity 30 µV

SPECIFICATIONS

MW/LW (AEP, UK, E model)

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 52 W ×4 (at 4 ohms)

General

Outputs Audio outputs (front/rear)

Subwoofer output (mono)

Power antenna relay

control lead (US model)

Power aerial relay

control lead (AEP, UK, E model)

Power amplifier control

lead

FM/AM COMPACT DISC PLAYER

CDX-M620/M670

FM/MW/LW COMPACT DISC PLAYER

CDX-M670

– Continued on next page –

Sony Corporation

Audio Entertainment Group

General Engineering Dept.

9-873-505-11

2001C0400-1

4040

CDX-M620/M670

IC B/D

• Refer to page 37 for Waveforms.

4-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (1/2) — • Refer to page 54 for IC Block Diagrams.

(Page 46)

Note:

• Voltage is dc with respect to

ground under no-signal conditions.

no mark : CD PLAY

(Page 41)

41 41

CDX-M620/M670

IC B/D

• Refer to page 37 for Waveforms.

4-8. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (2/2) — • Refer to page 54 for IC Block Diagrams.

(Page 40)

Note:

• Voltage is dc with respect to

ground under no-signal conditions.

no mark : CD PLAY

4444

CDX-M620/M670

IC B/D

• Refer to page 37 for Waveforms.

4-10. SCHEMATIC DIAGRAM — MAIN SECTION (1/4) — • Refer to page 54 for IC Block Diagrams.

(Page 45)

Note:

• Voltage is dc with respect to ground under

no-signal (detuned) condition.

no mark : FM

(Page 46)

45 45

CDX-M620/M670

IC B/D

4-11. SCHEMATIC DIAGRAM — MAIN SECTION (2/4) — • Refer to page 54 for IC Block Diagrams.

(Page 46)

Note:

• Voltage is dc with respect to ground under

no-signal (detuned) condition.

no mark : FM

(Page

44)

4646

CDX-M620/M670

IC B/D

• Refer to page 37 for Waveforms.

4-12. SCHEMATIC DIAGRAM — MAIN SECTION (3/4) — • Refer to page 54 for IC Block Diagrams.

Note:

• Voltage is dc with respect to ground under

no-signal (detuned) condition.

no mark : FM

( ) : AM/MW/LW

< > : CD PLAY

(Page 40)

(Page 44) (Page 45)

(Page 47)

47 47

CDX-M620/M670

IC B/D

Note:

• Voltage is dc with respect to ground under

no-signal (detuned) condition.

no mark : FM

(Page

46)

(Page 51)

• Refer to page 37 for Waveforms.

4-13. SCHEMATIC DIAGRAM — MAIN SECTION (4/4) — • Refer to page 54 for IC Block Diagrams.

(Page 49)

49 49

CDX-M620/M670

IC B/D

4-15. SCHEMATIC DIAGRAM — SUB (CD) SECTION — • Refer to page 55 for IC Block Diagram.

(Page 47)

Note:

• Voltage is dc with respect to ground under

no-signal (detuned) condition.

no mark : FM

51 51

CDX-M620/M670

Note:

• Voltage is dc with respect to ground under no-signal

(detuned) condition.

no mark : FM

4-17. SCHEMATIC DIAGRAM — KEY SECTION —

(Page

47)

(Page 53)

53 53

CDX-M620/M670

Note:

• Voltage is dc with respect to ground under no-signal

(detuned) condition.

no mark : FM

4-19. SCHEMATIC DIAGRAM — DISPLAY SECTION — • Refer to page 55 for IC Block Diagrams.

IC B/D

(Page

51)

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