Sony CDX-GT637UI User Manual

SERVICE MANUAL
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
USB Player section
Interface: USB (Full-speed)
Maximum current: 500mA
Power amplifi er section
Outputs: Speaker outputs (sure seal connectors)
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W × 4 (at 4 ohms)
CDX-GT63UIW/GT630UI/
GT637UI
CDX-GT63UIW: US, Canadian model/GT630UI: US model
FM/AM COMPACT DISC PLAYER
CDX-GT630UI: AEP, UK, Italian model/GT637UI
FM/MW/LW COMPACT DISC PLAYER
9-889-255-02
2008K04-1
©
2008.11
US Model
CDX-GT63UIW/GT630UI
Canadian Model
CDX-GT63UIW
AEP Model
UK Model
CDX-GT630UI
Russian Model
CDX-GT637UI
Ver. 1.1 2008.11
SPECIFICATIONS
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:
US, Canadian model: 87.5 – 107.9 MHz
AEP, UK, Italian model:87.5 – 108.0 MHz
Russian model:
FM1/FM2: 87.5 – 108.0 MHz (at 50 kHz step)
FM3: 65 – 74 MHz (at 30 kHz step)
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 150 kHz
Usable sensitivity: 10 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 70 dB (mono)
Separation: 40 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
AM (US, Canadian model)
Tuning range: 530 – 1,710 kHz
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Sensitivity: 26 μV
MW/LW (AEP, UK, Italian, Russian model)
Tuning range:
MW: 531 – 1,602 kHz
LW: 153 – 279 kHz
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Sensitivity: MW: 26 μV, LW: 45 μV
Model Name Using Similar Mechanism NEW
CD Drive Mechanism Type MG-101Z-188//Q
Optical Pick-up Name DAX-25A
• The tuner and CD sections have no adjustments.
AUDIO POWER SPECIFICATIONS
(US, Canadian model)
CEA2006 Standard
Power Output: 17 Watts RMS × 4 at
4 Ohms <1 % THD + N
SN Ratio: 82 dBA
(reference: 1 Watt into 4 Ohms)
Photo: CDX-GT630UI: AEP, UK model
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Sony CDX-GT637UI Specifications

General

Type	CD Receiver
Channels	4
Peak Power Output	52 Watts
Tuner Bands	AM/FM
CD Playback	Yes
Audio D/A Converter (DAC)	24-bit
USB Port	Yes
AUX Input	Yes
Bluetooth	No
Display	LCD
Equalizer	Yes
Equalizer bands quantity	5
Subwoofer out	Yes
USB direct playback	Yes
iPod control	Yes
Remote Control	Yes
Preset Stations Quantity	18
Pre out port(s)	1

Summary

Sony CDX-GT63UIW/GT630UI/GT637UI Service Manual Content

Product Specifications

Details on audio output, CD player performance, tuner ranges, and amplifier specs.

General Information, Controls, and Connections

Product handling, safety notes, control locations for various models, and connection diagrams.

Service Notes and Disassembly Procedures

Critical service notes, component replacement guidance, and step-by-step disassembly instructions.

Diagrams, Schematics, and IC Information

Block diagrams, schematics, PWB layouts, IC block diagrams, and pin function descriptions.

Exploded Views and Electrical Parts List

Visual breakdowns of unit assemblies and comprehensive lists of electrical components.

Supplement-1: Key Board Update

Details on key board changes, including PWB and schematic updates.

Revision History

Log of updates, versions, and changes made to the service manual.