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SERVICE MANUAL
Ver. 1.0 2009.11
• The tuner and CD sections have no adjustments.
AUDIO POWER SPECIFICATIONS
(US 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)
Tuner section
FM
Tuning range:
CDX-GT440U: US model:
87.5 – 107.9 MHz
CDX-GT440U: AEP, UK, RU model/GT444U:
87.5 – 108.0 MHz
CDX-GT447UE:
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
Sony Corporation
9-889-701-01
2009K0400-1
Audio&Video Business Group
©
2009.11
Published by Sony Techno Create Corporation
CDX-GT440U/GT444U/
Photo: CDX-GT440U: AEP, UK model
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
AM (US model)
Tuning range: 530 – 1,710 kHz
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Sensitivity: 26 V
MW/LW (AEP, UK, RU 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 V, LW: 45V
CD player section
Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and fl utter: Below measurable limit
FM/AM COMPACT DISC PLAYER
FM/MW/LW COMPACT DISC PLAYER
GT447UE
US Model
CDX-GT440U
AEP Model
UK Model
CDX-GT440U/GT444U
Russian Model
CDX-GT440U/GT447UE
CDX-GT33U
MG-101Y-188//Q
DAX-25A
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)
– Continued on next page –
AEP, UK, Russian model
US model
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Table of Contents
Related Manuals for Sony CDX-GT447UE
Summarization of Contents
Specifications
Audio Power Specifications
Details power output and SN ratio for US model according to CEA2006 standard.
Tuner Section Specifications
Specifies tuning ranges, sensitivity, selectivity, and frequency response for FM and AM/MW/LW.
CD Player Specifications
Lists signal-to-noise ratio and frequency response for the CD player section.
USB Player Specifications
Details USB interface and maximum current for playback.
Power Amplifier Specifications
Outlines speaker outputs, impedance, and maximum power ratings.
General Unit Information
Unit Output Terminals
Lists various output terminals like audio, power antenna, and power amplifier control.
Unit Input Terminals
Lists input terminals like telephone ATT, remote controller, antenna, AUX, and USB.
Tone Control Adjustments
Details the equalization ranges for low, mid, and high frequencies.
Unit Dimensions and Power
Specifies power source, voltage, physical dimensions and mounting.
Supplied Accessories List
Lists items included with the unit.
Handling and Safety Precautions
Optical Pick-up Block Handling
Provides guidance on handling the optical pick-up block to prevent electrostatic breakdown.
Laser Diode Emission Check Safety
Explains safe procedures for checking laser diode emission.
Chip Component Replacement Notes
Offers tips for replacing chip components, especially tantalum capacitors.
Test Discs for CD Section
Lists specific test discs recommended for CD section checks.
Critical Component Replacement Warning
Alerts users about critical safety components requiring specific replacement parts.
Product Classification and Soldering
Class 1 Laser Product Classification
States the unit is classified as a Class 1 Laser product.
Unleaded Solder Information
Discusses characteristics and handling of unleaded solder for PCB assembly.
Service Notes
Extension Cable and Service Position
Details how to connect an extension cable for servicing the unit.
USB Connector Replacement Procedure
Provides step-by-step instructions for replacing the USB connector.
Servo Board Replacement Guidance
Advises replacing the entire servo board as it cannot be repaired.
20-Pin Connector Handling Precautions
Offers precautions for cleaning and handling the 20-pin connector.
General Connections
US Model Connections Diagram
Illustrates connection points for the US model.
Wiring Connection Diagram
Shows detailed wiring diagrams for various connections.
Model Specific Connections
AEP, UK, Russian Model Connections
Illustrates connection points for AEP, UK, and Russian models.
Disassembly Procedures
Disassembly Overview
Lists the sequence of disassembly steps for the unit.
Sub Panel Assembly Disassembly
Outlines the procedure to disassemble the sub panel assembly.
CD Mechanism Block Disassembly
Details the disassembly of the CD mechanism block.
Main Board Removal
Describes how to access and remove the main board.
Servo Board Removal
Explains the disassembly of the servo board.
Chassis (T) Sub Assy Disassembly
Details the disassembly of the chassis (T) sub assembly.
Roller Arm Assembly Disassembly
Outlines the procedure for disassembling the roller arm assembly.
Chassis (OP) Assembly Disassembly
Describes the disassembly of the chassis (OP) assembly.
Chucking Arm Sub Assembly Disassembly
Details the disassembly of the chucking arm sub assembly.
Sled Motor Assembly Removal
Explains the removal of the sled motor assembly.
Optical Pick-up Section Disassembly
Outlines the disassembly of the optical pick-up section.
Optical Pick-up Removal
Describes the removal of the optical pick-up itself.
Diagram Conventions
Printed Wiring Board Symbols
Explains symbols used for printed wiring boards.
Schematic Diagram Conventions
Outlines conventions for schematic diagrams, including component notations.
Waveform Examples
Displays example waveforms for key ICs like IC401 and IC001.
Block Diagrams - Main Section
Main Section Block Diagram
Provides a block diagram of the main electronic section of the unit.
Block Diagrams - Display Section
Display Section Block Diagram
Illustrates the block diagram for the display and control sections.
Printed Wiring Board - Main Section
Main Board PCB Layout
Shows the physical layout of components and traces on the main board.
Schematic Diagrams - Main Section (Part 1/3)
Main Board Schematic (1/3)
Presents the first part of the schematic diagram for the main board.
Schematic Diagrams - Main Section (Part 2/3)
Main Board Schematic (2/3)
Presents the second part of the schematic diagram for the main board.
Schematic Diagrams - Main Section (Part 3/3)
Main Board Schematic (3/3)
Presents the third part of the schematic diagram for the main board.
Printed Wiring Boards - Key Section
Key Board PCB Layout
Shows the physical layout of components and traces on the key board.
Schematic Diagrams - Key Section
Key Board Schematic Diagram
Presents the schematic diagram for the key board.
IC Block Diagrams
IC301 TDA8588AJ/N2/R1 (US/GT447UE) Block Diagram
Block diagram for IC301, detailing its functions and pin assignments for specific models.
IC301 TDA8588AJ/N2/R1/M5 (AEP, UK, RU/GT444U) Block Diagram
Block diagram for IC301, detailing its functions and pin assignments for specific models.
Integrated Circuit Block Diagrams (Part 1)
IC402 TK11133CSCL-G Block Diagram
Block diagram for IC402, showing its internal circuitry and pin functions.
IC501 TPS40200DRG4 Block Diagram
Block diagram for IC501, illustrating its power supply control functions.
IC502 TC7WH123FU(TE12R) Block Diagram
Block diagram for IC502, showing its dual flip-flop functionality.
Integrated Circuit Block Diagrams (Part 2)
IC503 NJM2387ADL3(TE2) Block Diagram
Block diagram for IC503, detailing voltage regulation and protection features.
IC001 TEF6617T/V1/S470,518 (US/GT447UE) Block Diagram
Block diagram for IC001, showing FM/AM tuner and signal processing.
IC001 TEF6617T/V1/S470/M5,518 (AEP, UK, RU/GT444U) Block Diagram
Block diagram for IC001, showing FM/AM tuner and signal processing.
Audio Amplifier IC Block Diagram
IC302 BD3447AFV-E2 Block Diagram
Block diagram for IC302, illustrating audio processing, fader, and tone control functions.
IC Pin Function Descriptions
IC401 System Control Pin Functions
Detailed pin functions for the SYSTEM CONTROL IC401 on the main board.
IC Pin Function Descriptions (Continued)
IC Pin Function Details (Continued)
Continues the detailed pin functions for various ICs.
Exploded Views - Main Section
Main Section Exploded View
Exploded view of the main section of the unit, showing part relationships.
Exploded Views - Front Panel Section
Front Panel Section Exploded View
Illustrates the exploded view of the front panel assembly.
Exploded Views - CD Mechanism Section
CD Mechanism Section Exploded View
Shows the exploded view of the CD mechanism section.
Electrical Parts List - Board Components
Jack Board Components
Lists electrical components for the Jack board, including capacitors, coils, diodes, ICs, and connectors.
Key Board Components
Lists electrical components for the Key board, including LEDs, switches, and resistors.
Electrical Parts List - Key Main Section
Key Main Components Listing
Lists resistors, switches, and transistors for the Key Main section.
Electrical Parts List - Main Section
Main Board Component Listings
Lists various components like transistors, resistors, and capacitors for the Main board.
Electrical Parts List - Main Servo Section
Main Servo Component Listings
Lists components like transistors, resistors, surge absorbers, and vibrators for the Main Servo section.
Installation and Connection Parts
Parts for Installation and Connections
Lists hardware and cables for unit installation and connections.
Revision History
Document Revision Log
Records the version history and changes made to the manual.
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