Sony CDX-M620 - Fm/am Compact Disc Player User manual

1
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
FM
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
© 2001. 3

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)
(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)
(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
IC B/D
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)