Sony CDX-656X Car Stereo Manual

The Sony CDX-656X is an in-dash CD receiver designed for automotive use, featuring AM/FM radio with 18 FM/6 AM presets, CD playback, and an auxiliary input. It includes a detachable faceplate for security, a rotary volume/on-off knob, and a variety of audio controls. 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 CD 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, Remote Control (if included), Wiring Harness, Antenna Connector, Auxiliary Input.

Feature	Description
AM/FM Tuner	18 FM and 6 AM station presets
CD Player	Plays standard audio CDs and CD-R/RW
Auxiliary Input	3.5mm jack for external audio devices
Detachable Faceplate	Security feature to prevent theft
Rotary Volume/Power Knob	Combined power on/off and volume control
Audio Controls	Bass, Treble, Balance, Fader adjustments
LCD Display	Shows track, time, station, and settings
Clock	Digital clock display
Power Output	Typically 50W x 4 (max)
Power Requirements	12V DC, negative ground

Installation

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

Remove existing stereo: Use removal tools to extract old unit.
Connect wiring harness: Match colors (red to ignition, yellow to battery, black to ground).
Connect antenna plug: Insert into rear antenna socket.
Secure unit: Slide into dash opening and secure with mounting sleeve.
Reconnect battery and test.

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

First-Time Setup

Power on unit; follow basic setup steps.

Set the clock: Press and hold CLOCK button, use TUNE/SEEK to adjust.
Program radio stations: Tune to desired station, press and hold a preset button (1-6 for AM, 1-18 for FM).
Adjust audio settings: Use BASS, TREBLE, BAL, FAD controls to suit listening preference.
Attach faceplate: Slide onto main unit until it clicks into place.

CAUTION! Do not force the faceplate. Store it safely when detached.

Specifications

Type: In-Dash CD Receiver.
Tuner: AM/FM with 18 FM and 6 AM presets.
CD Playback: Supports CD, CD-R, CD-RW.
Audio Output: 50W x 4 Max Power.
Frequency Response: 20 Hz - 20 kHz.
Signal-to-Noise Ratio: >80 dB (CD).
Inputs: Auxiliary (3.5mm).
Power Supply: 12V DC, Negative Ground.
Dimensions: Standard DIN (approx. 7" x 2").

Controls and Settings

Front Panel: Rotary Volume/Power Knob, EJECT, SOURCE, BAND, TUNE/SEEK, Audio Controls (BASS/TREBLE/BAL/FAD), CLOCK.

Remote (if applicable): POWER, VOLUME, MUTE, SOURCE, TRACK UP/DOWN, PRESET buttons.

Audio Settings: Adjust BASS, TREBLE, BALANCE (left/right), FADER (front/rear). Radio: Store presets by holding button. Clock: Set via CLOCK button. Display: Dimmer may be adjustable.

Connecting Devices

Auxiliary Input: 3.5mm jack on front or rear for MP3 players, smartphones. Antenna: Standard motor vehicle antenna plug.

Turn off unit before connecting external devices.
Plug 3.5mm cable from device into AUX IN jack.
Select AUX source by pressing SOURCE button.

Tip: Use a high-quality cable for best audio performance.

Playing CD Media

Supports standard audio CDs, CD-R, CD-RW.

Insert disc: Press EJECT to open tray, place disc label-side up, press EJECT again to close.
Play: Unit usually starts playback automatically. Use TRACK UP/DOWN to skip.
Stop/Eject: Press EJECT to stop and open tray.
Scan: Press and hold TUNE/SEEK to scan through tracks.
Repeat: Press RPT (if available) to repeat track or disc.
Random: Press RDM (if available) for shuffle play.

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

Security Features

Detachable Faceplate: Remove to deter theft. Store in provided case. Security Code: Some models may have a user-set code to disable unit if power is lost (refer to specific model instructions).

Care & Cleaning

Disconnect power before cleaning. Use soft, dry cloth for exterior. For CD lens, use approved cleaning disc if necessary.

CAUTION! Do not use solvents or abrasive cleaners. Keep faceplate and CDs free from dust and moisture.

Regulatory Information

FCC Part 15: Class B digital device; complies with limits for vehicular use. This device complies with part 15 of the FCC Rules. Copyright © Sony Corporation. For support, visit www.sony.com/electronics/support or contact Sony customer service.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Blown fuse, wiring	Check vehicle fuse; verify wiring connections (red/yellow/black).
No sound	Mute, volume, speakers	Check mute is off; increase volume; verify speaker connections.
CD won't play	Disc, lens	Ensure disc is clean, not scratched; try a different CD; use cleaning disc.
Poor radio reception	Antenna	Ensure antenna is fully extended and connected securely.
Faceplate not attaching	Alignment, debris	Check alignment; clean connectors on unit and faceplate.

Reset: Disconnect power (remove fuse) for 1 minute to reset unit.

Service: Contact Sony support or authorized service center.