SERVICE MANUAL
Published by Sony Techno Create Corporation
Sony Corporation
Audio Business Group
SPECIFICATIONS
FM/MW/SW COMPACT DISC PLAYER
CDX-GT470U/GT470US
9-887-917-02
2008A04-1
©
2008.01
US Model
CDX-GT420U
AEP Model
UK Model
CDX-GT420U/GT424U
E Model
CDX-GT470U/GT470US
Russian Model
CDX-GT420U/GT427UE
Ver. 1.1 2008.01
Model Name Using Similar Mechanism NEW
CD Drive Mechanism Type MG-101I-188//Q
Optical Pick-up Name DAX-25A
• The tuner and CD sections have no adjustments.
CDX-GT420U/GT424U/GT427UE
GT470U/GT470US
(Photo: CDX-GT424U)
FM/MW/LW COMPACT DISC PLAYER
CDX-GT420U: AEP, UK, Russian model/GT424U/GT427UE
FM/AM COMPACT DISC PLAYER
CDX-GT420U: US model
CD Player section
Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and fl utter: Below measurable limit
Tuner section
FM
Tuning range:
CDX-GT420U: US model:
87.5 – 107.9 MHz
CDX-GT420U: AEP, UK, Russian model/
GT424U:
87.5 – 108.0 MHz
CDX-GT470U: E, indian model/GT470US:
87.5 – 108.0 MHz (at 50 kHz step)
87.5 – 107.9 MHz (at 200 kHz step)
CDX-GT470U: Saudi Arabian model:
87.5 – 108.0 MHz (at 50 kHz step)
CDX-GT427UE:
FM1/FM2: 87.5 – 108.0 MHz (at 50 kHz
step)
FM3: 65 – 74 MHz (at 30 kHz step)
FM tuning interval:
CDX-GT470U: E, indian model/GT470US:
50 kHz/200 kHz switchable
Antenna (aerial) terminal:
External antenna (aerial) 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
AM
CDX-GT420U: US model:
Tuning range: 530 – 1,710 kHz
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity: 30 μV
MW/LW
CDX-GT420U: AEP, UK, Russian model/
GT424U/GT427UE:
Tuning range:
MW: 531 – 1,602 kHz
LW: 153 – 279 kHz
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency:
10.7 MHz/450 kHz
Sensitivity:
MW: 30 μV, LW: 40 μV
– Continued on next page –
AUDIO POWER SPECIFICATIONS
(CDX-GT420U: 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.
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