Table of Contents
Advertisement
SERVICE MANUAL
Ver. 1.1 2008.01
• The tuner and CD sections have no adjustments.
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.
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)
Sony Corporation
9-887-917-02
2008A04-1
Audio Business Group
©
2008.01
Published by Sony Techno Create Corporation
CDX-GT420U/GT424U/GT427UE
(Photo: CDX-GT424U)
SPECIFICATIONS
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
FM/MW/LW COMPACT DISC PLAYER
CDX-GT420U: AEP, UK, Russian model/GT424U/GT427UE
FM/MW/SW COMPACT DISC PLAYER
GT470U/GT470US
Russian Model
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
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
FM/AM COMPACT DISC PLAYER
US Model
CDX-GT420U
AEP Model
UK Model
CDX-GT420U/GT424U
E Model
CDX-GT470U/GT470US
CDX-GT420U/GT427UE
NEW
MG-101I-188//Q
DAX-25A
– Continued on next page –
CDX-GT420U: US model
CDX-GT470U/GT470US
Advertisement
Table of Contents
Related Manuals for Sony CDX-GT427UE
Summarization of Contents
Service Notes
Handling and Safety Precautions
Guidelines for handling optical pick-ups, laser diodes, chip components, and test discs.
Unleaded Solder Information
Details on using unleaded solder and its characteristics.
Unit Specifications
Audio Power and CD Player Specs
Specifications for audio power output and CD player performance.
Tuner Specifications (FM/AM/MW/LW)
Details on FM, AM, MW, LW tuning ranges, sensitivity, and frequency response.
Additional Unit Specifications
SW Tuner, USB Player, and Amplifier Specs
Specifications for SW tuner, USB player interface, and power amplifier.
General Unit Details
Physical dimensions, mass, and supplied accessories.
Service and Operation
Service Position and Component Replacement
Instructions for service position and notes on replacing key components.
Control and Operation Overview
Description of main unit and remote commander controls and basic operations.
Connections
US Model Wiring Diagram
Diagram illustrating external connections for the US model.
AEP/UK/Russian Model Wiring Diagram
Diagram illustrating external connections for AEP, UK, and Russian models.
Disassembly Procedures
Disassembly Outline
Overview of the disassembly sequence.
Sub Panel and CD Mechanism Removal
Steps for removing the sub panel and CD mechanism block.
Main and Servo Board Removal
Procedures for removing the main board and servo board.
Chassis (T) Sub Assy and Roller Arm Assy Removal
Steps for disassembling the chassis (T) sub assembly and roller arm assembly.
Chassis (OP) Assy and Chucking Arm Sub Assy Removal
Steps for disassembling the chassis (OP) assy and chucking arm sub assy.
Sled Motor Assy Disassembly
Procedure for disassembling the sled motor assembly.
Optical Pick-up Section and Pick-up Disassembly
Steps for disassembling the optical pick-up section and the optical pick-up itself.
Diagnosis Function
Entering and Exiting Diagnosis Mode
Instructions on how to set and cancel the diagnostic display mode.
Diagnosis Display Modes (Reset Count, Operating Hours)
Explanation of display modes for reset count, connected units, and operating hours.
CD Error Information Display Modes
Details on CD error codes, descriptions, and history.
OFFSET/FAILURE Error Display
Information on offset/failure error codes and history.
USB Error Information Display (Error Codes)
List of USB error codes and their descriptions.
USB Error Information Display (History)
Detailed breakdown of USB error information history and display.
Diagrams and Schematics
Main Section Block Diagram
Block diagram illustrating the main section of the unit's circuitry.
Display Section Block Diagram
Block diagram detailing the display section and its components.
IC Block Diagrams (Part 1)
Block diagrams for key integrated circuits used in the unit (Part 1).
IC Block Diagrams (Part 2)
Block diagrams for key integrated circuits used in the unit (Part 2).
Main Section Schematic Diagrams (1/3)
First part of the schematic diagram for the main section.
Main Section Schematic Diagrams (2/3)
Second part of the schematic diagram for the main section.
Main Section Schematic Diagrams (3/3)
Third part of the schematic diagram for the main section.
Key Section Printed Wiring Boards
Layout of the printed wiring boards for the key section.
Key Section Schematic Diagram
Schematic diagram for the key section.
Exploded Views
Main Section Exploded View
Exploded diagram showing parts of the main section.
Front Panel Section Exploded View
Exploded diagram showing parts of the front panel section.
CD Mechanism Section Exploded View
Exploded diagram showing parts of the CD mechanism section.
Electrical Parts List
Jack Board Electrical Parts
List of electrical components for the jack board.
Key Board Electrical Parts (Switches, Resistors)
List of switches and resistors for the key board.
Key Board Electrical Parts (Capacitors, Connectors, Diodes)
List of capacitors, connectors, and diodes for the key board.
Main Board Electrical Parts (Capacitors, Connectors, Diodes)
List of capacitors, connectors, and diodes for the main board.
Main Board Electrical Parts (Resistors)
List of resistors for the main board.
Servo Board and Other Component Lists
List of components for the servo board, tuner, vibrator, and miscellaneous parts.
Installation and Connection Parts
List of parts for installation and external connections.
Need help?
Do you have a question about the CDX-GT427UE and is the answer not in the manual?
Questions and answers