Sony CDX-M9900 Car Stereo Manual

The Sony CDX-M9900 is a high-performance car stereo featuring CD/MP3 playback, AM/FM tuner with 30 station presets, detachable faceplate security, 4x50W MOSFET amplifier, 3-band parametric EQ with 7 preset sound fields, CD changer control, auxiliary input, and wireless remote compatibility. 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 detachable faceplate, Wireless Remote Control, Wiring harness, Mounting sleeve, User manual.

Feature	Description
CD/MP3 Playback	Plays audio CDs and MP3 encoded discs
AM/FM Tuner	30 station presets (18 FM, 12 AM)
Detachable Faceplate	Security feature to prevent theft
MOSFET Amplifier	4 x 50 Watts maximum power output
Parametric EQ	3-band equalizer with 7 preset sound fields
CD Changer Control	Compatible with Sony CD changers
Auxiliary Input	For external audio sources
Wireless Remote	Included for convenient control
Clock & Timer	Built-in clock with sleep timer function
Loudness Function	Enhances bass at low volume levels

Installation

Unpack and inspect contents. Ensure vehicle is parked with ignition off.

Disconnect negative battery terminal: For safety during installation.
Prepare mounting area: Remove existing stereo if present.
Connect wiring harness: Match colors to vehicle wiring (red-ignition, yellow-battery, black-ground).
Connect speakers: Ensure proper polarity (positive/negative).
Secure unit: Insert mounting sleeve, slide unit into place until it clicks.
Reconnect battery: Test operation before final assembly.

WARNING! Ensure all connections are secure and insulated. Professional installation recommended if unsure.

First-Time Setup

Reconnect battery; turn on ignition to accessory position.

Set clock: Press and hold CLOCK button, use TUNE/SEEK to adjust time.
Program radio stations: Tune to desired station, press and hold preset button (1-6) for 2 seconds.
Adjust sound settings: Use EQ button to select sound field (ROCK, POP, JAZZ, etc.).
Set fade/balance: Use FADER/BALANCE controls for optimal speaker distribution.
Test CD playback: Insert audio CD to verify proper operation.

CAUTION! Do not operate while driving. Park vehicle during setup.

Specifications

Power Output: 50W x 4 (Max), 22W x 4 (RMS).
Tuner: FM/AM with 30 presets.
CD Compatibility: Audio CD, CD-R, CD-RW, MP3 CD.
Frequency Response: 10Hz - 20kHz.
Signal-to-Noise: 100dB (CD), 58dB (FM).
EQ: 3-band parametric with 7 presets + user custom.
Dimensions: DIN size (178mm x 50mm x 159mm).
Power Requirement: 12V DC, negative ground.
Operating Temp: -20°C to +60°C.

Controls and Settings

Front Panel: POWER/VOLUME knob, SOURCE button, BAND button, EQ button, OPEN/CLOSE, AUDIO/ATT.

Remote: POWER, Numeric buttons, OPEN/CLOSE, SOURCE, VOLUME, MUTE, BAND, EQ, DISP.

Audio Settings: BASS, MIDDLE, TREBLE, FADER, BALANCE, LOUDNESS. Tuner: Manual/seek tuning, preset selection. CD: PLAY, STOP, PAUSE, SKIP, SCAN, REPEAT, RANDOM. Display: Dimmer control, clock display toggle. Security: Detach faceplate by pressing release button.

Connecting Devices

CD Changer: Connect via dedicated bus cable. Aux Input: Use 3.5mm jack for portable players.

Turn off ignition before connecting devices.
Connect CD changer cable to CHANGER port on rear.
Connect auxiliary cable to AUX IN port.
Select source via SOURCE button (TUNER, CD, AUX).

Tip: Use quality cables for best audio performance. Secure cables away from moving parts.

Playing Media

Supports Audio CD, MP3 CD, CD-R, CD-RW.

Insert disc: Press OPEN/CLOSE, load CD label side up.
Play: Press PLAY; automatic playback begins.
Skip tracks: Press >>| or |<< for next/previous.
Scan: Press and hold >>| or |<< to scan through tracks.
Repeat/Random: Press RPT for repeat track/all; press RDM for random play.
MP3 Navigation: Use folder buttons to navigate directory structure.
Pause: Press PAUSE during playback.
Eject: Press OPEN/CLOSE to remove disc.

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

Security Features

Detachable Faceplate: Press release button, slide faceplate off. Security Code: Optional code can be set (default 0000). Theft Deterrent LED: Flashes when faceplate removed.

Care & Cleaning

Disconnect battery before cleaning. Use soft, dry cloth for faceplate and unit. For stubborn stains, dampen cloth slightly with water.

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

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. ICES-003: Complies with Canadian EMI regulations. Copyright © Sony Corporation. For support, visit www.sony.com/electronics/support or contact 1-800-222-7669.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Wiring/ignition	Check fuse (10A); verify ignition wire connection; ensure battery connected.
No sound from speakers	Speaker wiring	Check speaker connections; verify polarity; test speakers individually.
CD won't play	Disc/loading	Ensure disc is clean, not scratched; check format compatibility; reload properly.
Poor radio reception	Antenna	Ensure antenna fully extended and connected; check for obstructions.
Faceplate won't attach	Alignment/dirt	Clean connectors with dry cloth; align properly and press firmly until click.
Remote not working	Batteries/obstruction	Replace batteries; ensure clear line of sight to unit's sensor.

Reset: Disconnect battery for 1 minute to reset unit memory.

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