Sony CDX-GT44IP User Manual

SERVICE MANUAL
Sony Corporation
eVehicle Division
Published by Sony Techno Create Corporation
US Model
CDX-GT42IPW/GT420IP
AEP Model
UK Model
CDX-GT44IP
9-887-813-01
2007H04-1
© 2007. 08
Ver. 1.0 2007. 08
SPECIFICATIONS
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 CDX-GT42IPW/GT420IP:
87.5 – 107.9 MHz
CDX-GT44IP:
87.5 – 108.0 MHz
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
AM (CDX-GT42IPW/GT420IP)
Tuning range 530 – 1,710 kHz
Antenna terminal External antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity 30 µV
MW/LW (CDX-GT44IP)
Tuning range MW: 531 – 1,602 kHz
LW: 153 – 279 kHz
Antenna terminal External antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity MW: 30 µV, LW: 40 µV
• The tuner and CD sections have no adjustments.
Model Name Using Similar Mechanism CDX-GT22W/GT120/GT220
CD Drive Mechanism Type MG-101TC-188//C
Optical Pick-up Name DAX-25A
– Continued on next page –
AUDIO POWER SPECIFICATIONS (CDX-GT42IPW/GT420IP)
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.
(Photo: CDX-GT42IPW)
CDX-GT42IPW/GT44IP/
GT420IP
FM/AM COMPACT DISC PLAYER
CDX-GT42IPW/GT420IP
FM/MW/LW COMPACT DISC PLAYER
CDX-GT44IP

Sony CDX-GT44IP Specifications

General

MP3 playback	Yes
Tuner type	SSIR-EXA
Product color	Black
Equalizer bands quantity	3
Signal-to-Noise Ratio (SNR)	120 dB
File type	WMA, MP3
Key illumination color	Red

Weight and Dimensions

Dimensions (WxDxH)	178 x 179 x 50 mm

Summary

Service Manual and Overview

Key Specifications

Details on audio power, CD player, and tuner performance metrics.

CD Player Specifications

Technical data for the CD playback section, including signal-to-noise ratio and frequency response.

Tuner Section Specifications

Performance data for FM and AM/MW/LW tuning, sensitivity, and distortion.

Important Service Notes

Handling the Optical Pick-Up Block

Precautions for preventing electrostatic breakdown and handling the flexible board.

Laser Diode Emission Check

Safety guidelines for checking the laser diode emission, emphasizing safe observation distance.

Safety-Related Component Warning

Identifies critical components vital for safe operation, requiring specific replacement parts.

Disassembly Procedures

Sub Panel Assembly Disassembly

Step-by-step guide for removing the sub panel assembly.

CD Mechanism Block Disassembly

Procedure for detaching the CD mechanism block from the unit.

Main Board Removal

Instructions for safely removing the main circuit board.

Servo Board Removal

Steps for disassembling and removing the servo board.

Optical Pick-Up Section Disassembly

Detailed instructions for disassembling the optical pick-up section.

Diagnosis Functionality

Setting the Diagnosis Display Mode

Procedure to enter and set the diagnosis display mode using unit buttons or remote.

Canceling the Diagnosis Display Mode

How to exit the diagnosis function mode by pressing the OFF button.

Initial Diagnosis Display

The default display shown upon entering the diagnosis mode.

Reset Count Display Mode

Displays the reset count in hexadecimal format.

Operating Hours Display Mode

Shows the total operating hours of the unit in hexadecimal format.

CD Error Information Display

Details various CD error codes and their descriptions.

Offset/Failure Error Display

Indicates offset or failure errors with history tracking.

Circuit Diagrams and Schematics

Main Section Block Diagram

High-level block diagram illustrating the main functional sections and signal flow.

Main Section Printed Wiring Board

Layout of components and connections on the main circuit board.

Main Section Schematic Diagram (1/4)

Detailed schematic of the main section, part one of four.

IC Block Diagrams

Internal block diagrams for key integrated circuits used in the unit.

Exploded Views and Parts Identification

Main Section Exploded View

Visual breakdown of the main unit components with part numbers.

Front Panel Section Exploded View

Detailed exploded diagram of the front panel assembly and its parts.

CD Mechanism Section Exploded View

Exploded view of the CD mechanism (MG-101TC-188//C) and associated parts.

Electrical Parts List