Sony CDX-A251C Service Manual

SERVICE MANUAL
Ver. 1.0 2006. 01
• The tuner and CD sections have no adjustments.
AUDIO POWER SPECIFICATIONS (US Model)
POWER OUTPUT AND 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: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and flutter: Below measurable limit
Tuner section
FM
Tuning range: US, CND model:
87.5 – 107.9 MHz
AEP, UK model:
87.5 – 108.0 MHz
E, MX model:
87.5 – 108.0 MHz (at 50 kHz step)
87.5 – 107.9 MHz (at 200 kHz step)
FM tuning interval: E, MX model:
50 kHz/200 kHz switchable
Antenna terminal: External antenna connector
Intermediate frequency: 10.7 MHz/450 kHz
Usable sensitivity: 9 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 67 dB (stereo), 69 dB (mono)
Harmonic distortion at 1 kHz:
0.5 % (stereo), 0.3 % (mono)
Separation: 35 dB at 1 kHz
Frequency response: 30 – 15,000 Hz
Sony Corporation
9-887-047-01
2006A04-1 eVehicle Division
© 2006. 01 Published by Sony Techno Create Corporation
CDX-A251C
Photo: AEP, UK model
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
AM (US, CND, E, MX)
Tuning range:
AM tuning interval:
Antenna terminal:
Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity:
MW/LW (AEP, UK)
Tuning range:
Aerial terminal:
Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity:
FM/AM COMPACT DISC PLAYER
FM/MW/LW COMPACT DISC PLAYER
US Model
Canadian Model
AEP Model
UK Model
E Model
CDX-GT50W/GT500/GT550
MG-611WA-186//Q
KSS1000E
US, CND model:
530 – 1,710 kHz
E, MX model:
531 – 1,602 kHz (at 9 kHz step)
530 – 1,710 kHz (at 10 kHz step)
E, MX model:
9 kHz/10 kHz switchable
External antenna connector
30 µV
MW: 531 – 1,602 kHz
LW: 153 – 279 kHz
External aerial connector
MW: 30 µV, LW: 40 µV
– Continued on next page –
US, Canadian, E, Mexican MODEL
AEP,UK MODEL
1