Sony CDX-GT20 Car Stereo Manual

The Sony CDX-GT20 is a single-DIN car stereo featuring a CD player with MP3/WMA playback, AM/FM tuner with 18 presets, front auxiliary input, detachable faceplate security, 52W x 4 high power output, and Bass Boost function. It includes a wired remote control input and is designed for easy installation in most vehicles. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Playing Media 8. Security Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Main unit with CD slot, Detachable Faceplate, Wired Remote Control, Front AUX Input, ISO wiring harness.

Feature	Description
CD Player	Plays Audio CDs, CD-R/RW with MP3/WMA files
AM/FM Tuner	18 station presets (12 FM, 6 AM)
Front AUX Input	3.5mm jack for portable audio devices
Detachable Faceplate	Security feature to prevent theft
Power Output	52W x 4 channels (max)
Bass Boost	Enhances low-frequency sound
Wired Remote Input	For optional Sony wired remote control
LCD Display	Shows track info, radio frequency, time
Clock Function	12/24 hour format
Power Requirements	12V DC, negative ground

Installation

Unpack and inspect contents. Ensure vehicle is off and battery disconnected.

Remove existing stereo: Use removal keys or tools specific to your vehicle.
Connect wiring harness: Match colors (Red: Ignition, Yellow: Battery, Black: Ground, etc.).
Connect antenna plug: Push firmly into antenna socket on rear of unit.
Secure unit in dash: Use mounting sleeve and bend tabs to lock in place.
Reconnect vehicle battery and test functions.

WARNING! Disconnect vehicle battery before installation to prevent short circuits. Ensure all connections are secure and insulated.

First-Time Setup

Reconnect battery; power on the stereo.

Set the clock: Press and hold the DISP button until clock blinks, use TUNE/SEEK to adjust.
Program radio presets: Tune to desired station, press and hold a numbered button (1-6) for 2 seconds.
Adjust audio settings: Use BASS/TREBLE controls or menu for equalizer settings.
Detach faceplate: Press RELEASE button and store securely when leaving vehicle.

CAUTION! Do not force the faceplate on or off. Handle with care to avoid damage.

Specifications

Form Factor: Single-DIN (50mm x 180mm).
Disc Compatibility: CD, CD-R, CD-RW (MP3/WMA).
Tuner Sensitivity: FM: 10.8 dBf, AM: 20 µV.
Output Power: 52W x 4 (Max), 17W x 4 (RMS).
Frequency Response: 20 Hz - 20,000 Hz.
Signal-to-Noise Ratio: >90 dB (CD).
Inputs: Front 3.5mm AUX, Wired Remote.
Power Supply: 12V DC (11-16V range).
Operating Temp: 0°C to 40°C (32°F to 104°F).

Controls and Settings

Front Panel: POWER/VOLUME knob, SOURCE button, BASS/TREBLE buttons, DISP/CLOCK, RELEASE (faceplate).

Remote (if included): POWER, VOLUME UP/DOWN, SOURCE, TRACK UP/DOWN, PRESET UP/DOWN.

Audio: BASS, TREBLE, LOUDNESS (On/Off), BALANCE, FADER. Radio: Manual tuning, Seek, Preset memory. CD: Play/Pause, Track Skip, Repeat (1/All), Random Play. Display: Dimmer (On/Off), Clock setting. System: Reset (returns to factory defaults).

Connecting Devices

AUX Input: Front 3.5mm jack for MP3 players/phones. Wired Remote: Optional connection on rear.

Turn off stereo before connecting devices.
Plug 3.5mm cable from device into front AUX input.
Press SOURCE button repeatedly to select "AUX" mode.
Control volume on the stereo, playback on the device.

Tip: Use a high-quality audio cable for best sound from auxiliary devices.

Playing Media

Supports Audio CDs and MP3/WMA files on CD-R/RW.

Insert disc: Label side up, into the slot until it pulls in automatically.
Play: Unit will start playback automatically or press PLAY.
Skip tracks: Press >>| or |<< for next/previous track.
Fast forward/rewind: Press and hold >>| or |<< during playback.
Repeat/Random: Press RPT or RDM button to toggle modes.
MP3/WMA navigation: Use folder buttons (if equipped) or track skip to navigate directories.
Eject: Press the EJECT button; remove disc when fully extended.

WARNING! Do not insert damaged, warped, or non-standard discs. Do not use in extreme temperatures.

Security Features

Detachable Faceplate: Primary theft deterrent. Remove by pressing RELEASE button. Security Code: Optional feature; if enabled and power is disconnected, code must be entered upon reconnection (default code 0000 or as set by user).

Care & Cleaning

Disconnect power before cleaning. Use soft, dry cloth for faceplate and display. For stubborn marks, dampen cloth slightly with water only.

CAUTION! Do not use solvents, benzene, or abrasive cleaners. Never spray liquids directly onto the unit.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. This device complies with part 15 of the FCC Rules. Copyright © Sony Corporation. All trademarks are the property of their respective owners. For support, visit www.sony.com/electronics/support or contact Sony customer service at 1-800-222-7669.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Blown fuse, wiring	Check vehicle fuse (usually 10A-15A); verify wiring connections (Red/Yellow/Black).
No sound from speakers	Speaker wires, settings	Check speaker wire connections; ensure FADER/BALANCE is centered; volume is up.
CD won't play/eject	Disc error, mechanism	Ensure disc is not damaged or upside down; try resetting unit (disconnect power).
Poor radio reception	Antenna connection	Ensure antenna plug is fully inserted; check antenna for damage.
Unit asks for code	Power loss, security	Enter 4-digit security code (default 0000 or your personal code).
AUX input not working	Source mode, cable	Ensure SOURCE is set to AUX; check 3.5mm cable for damage.

Reset: Disconnect power for 2 minutes to reset microprocessor.

Service: 1-800-222-7669; www.sony.com/electronics/support