Sony CDX-GT28 Car Stereo Manual

The Sony CDX-GT28 is a single-DIN car stereo featuring CD playback, AM/FM tuner with 18 presets, front auxiliary input, detachable faceplate security, and 52W x 4 high power output. It includes features like BBE MP, DSO (Dynamic Soundstage Organizer), and EQ7 sound settings. 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, Detachable faceplate, Wiring harness, Mounting sleeve, Remote control, User manual.

Feature	Description
CD Playback	Plays CD, CD-R, CD-RW (MP3/WMA)
AM/FM Tuner	18 preset stations (12 FM, 6 AM)
Front AUX Input	3.5mm jack for portable audio devices
Power Output	52W x 4 (max), 17W x 4 (RMS)
Sound Features	BBE MP, DSO, EQ7, Loudness
Security	Detachable faceplate
Display	Multi-line fluorescent display
Clock	Built-in digital clock
Audio Controls	Bass, Treble, Fader, Balance
Power Requirements	12V DC, negative ground

Installation

Unpack and inspect contents. Ensure vehicle is turned off.

Disconnect negative battery terminal for safety.
Remove existing stereo using appropriate removal tools.
Connect wiring harness: Match colors (Red: +12V ignition, Yellow: +12V battery, Black: Ground, etc.).
Connect antenna cable to antenna input on rear of unit.
Slide unit into mounting sleeve and secure with brackets.
Reconnect negative battery terminal.

WARNING! Incorrect wiring may damage the unit or vehicle electrical system. Consult professional installer if unsure.

First-Time Setup

Power on unit; follow initial setup.

Set clock: Press and hold CLOCK button, use TUNE/SEEK to adjust.
Program radio presets: Tune to desired station, press and hold preset button (1-6).
Adjust sound settings: Use SOUND button to select EQ7 presets (POP, ROCK, etc.) or customize.
Set security code: In menu, set 4-digit code for faceplate security.

CAUTION! Do not operate while driving. Park vehicle for initial setup.

Specifications

Audio Formats: CD-DA, CD-R/RW (MP3/WMA).
Tuner: FM/AM with 18 presets.
Output Power: 52W x 4 max (17W x 4 RMS).
Frequency Response: 20Hz - 20kHz.
Signal-to-Noise Ratio: >90dB (CD).
Inputs: Front AUX (3.5mm).
Preamp Outputs: None.
Power Supply: 12V DC, negative ground.
Dimensions: 178mm (W) x 50mm (H) x 160mm (D).

Controls and Settings

Front Panel: POWER/VOLUME knob, SRC (source), SOUND, BAND, OPEN/CLOSE, AUX jack.

Remote: POWER, Numeric buttons, SRC, VOLUME, MUTE, BAND, SOUND, PLAY/PAUSE.

Sound Settings: BBE MP (enhances compressed audio), DSO (widens soundstage), EQ7 (7-band equalizer presets), Bass/Treble (-7 to +7), Fader/Balance. Radio: Manual/auto tuning, preset memory. Clock: 12/24 hour format. Security: Code setting for faceplate.

Connecting Devices

AUX Input: Front 3.5mm jack for MP3 players, smartphones. Antenna: Standard car antenna cable.

Turn off unit before connecting devices.
Plug 3.5mm cable from device into front AUX jack.
Select AUX source by pressing SRC button.
Control volume on both device and car stereo.

Tip: Use high-quality cables for best audio performance.

Playing Media

Supports audio CDs, CD-R/RW with MP3/WMA files.

Insert disc: Press OPEN/CLOSE, load CD label side up.
Play: Press PLAY; select tracks with numeric buttons or TUNE/SEEK.
Stop: Press SRC to change source or eject disc.
Skip: PREV/NEXT for tracks.
MP3/WMA navigation: Use FOLDER buttons to navigate directories.
Repeat/Random: Press RPT or RDM during playback.
Scan: Press and hold TUNE/SEEK to sample tracks.
Pause: Press PLAY/PAUSE to pause/resume.

WARNING! Do not use damaged or irregularly shaped discs. Avoid extreme temperatures.

Security Features

Detachable Faceplate: Remove to deter theft. Security Code: 4-digit code prevents unauthorized use if faceplate is lost/stolen.

Care & Cleaning

Turn off and detach faceplate before cleaning. Use soft, dry cloth; avoid solvents.

CAUTION! Do not spray liquids directly on unit. Keep faceplate away from heat and moisture.

Regulatory Information

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Wiring/fuse	Check connections; verify 12V power; check vehicle fuse.
No sound	Mute/settings	Check mute; adjust volume; verify speaker connections.
CD won't play	Disc/format	Ensure disc is compatible (CD-DA, MP3/WMA); clean disc.
Poor radio reception	Antenna	Ensure antenna connected; extend antenna fully.
Faceplate not attaching	Dirt/alignment	Clean connectors; align properly and push until click.

Reset: Disconnect battery for 1 minute to reset unit.

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