Kenwood KDC MP4028 Manual

The Kenwood KDC MP4028 is a high-performance car stereo system featuring CD/MP3/WMA playback, AM/FM tuner with 18 FM/6 AM presets, detachable faceplate security, 4-channel amplifier (22W x 4), auxiliary input, CD changer control, loudness control, and advanced audio adjustments. Below are key sections for installation, features, operation, settings, and troubleshooting.

1. Features at a Glance 2. Installation 3. Basic Operation 4. Specifications 5. Controls and Settings 6. Audio Source Connection 7. Playing Media 8. Security Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Main unit, Remote Control, Wiring harness, Mounting sleeve, User manual.

Feature	Description
CD/MP3/WMA playback	Plays standard CDs and compressed audio files
AM/FM tuner	18 FM and 6 AM station presets
Detachable faceplate	Security feature to prevent theft
4-channel amplifier	22 watts RMS x 4 channels
Auxiliary input	For external audio devices
CD changer control	Compatible with Kenwood CD changers
Loudness control	Enhances bass at low volumes
Bass/Treble controls	Adjustable audio equalization
Balance/Fader	Speaker output adjustment
Illumination	Green button illumination

Installation

Prepare vehicle and gather necessary tools before installation.

Disconnect negative battery terminal for safety.
Remove existing stereo using removal tools if applicable.
Connect wiring harness following color-coded wiring diagram.
Connect antenna cable and auxiliary input if used.
Slide unit into dashboard and secure with mounting sleeve.
Reconnect battery and test all functions.

WARNING! Always disconnect vehicle battery before installation to prevent electrical shorts.

Basic Operation

Power on unit; familiarize with basic controls.

Source selection: Press SOURCE to cycle through CD, Tuner, Aux.
Volume control: Turn VOL knob or use remote volume buttons.
Track selection: Use SEEK buttons or remote for next/previous.
Preset stations: Store FM/AM stations in memory banks.
Faceplate removal: Press release button and slide faceplate out.

CAUTION! Do not remove faceplate while unit is in operation.

Specifications

Power Output: 22W x 4 channels (RMS)
CD Formats: CD, CD-R, CD-RW, MP3, WMA
Tuner Sensitivity: FM 10.8 dBf, AM 18 dBμ
Preset Stations: 18 FM, 6 AM
Audio Input: Auxiliary input (3.5mm)
Frequency Response: 20Hz - 20kHz
Signal-to-Noise: 95 dB (CD)
Dimensions: DIN size (7" x 2")
Power Requirement: 12V DC, negative ground

Controls and Settings

Front Panel: POWER/VOL knob, SOURCE, SEEK/TRACK, BAND, MENU, EJECT.

Remote: POWER, Numeric buttons, VOLUME, MUTE, SOURCE, SEEK, BAND.

Audio Settings: BASS, TREBLE, BALANCE, FADER, LOUDNESS. Tuner Settings: Manual/seek tuning, Preset memory, Local/distance switch. CD Settings: Random/repeat play, Scan, Intro scan. System Settings: Display dimmer, Beep tone, Reset function.

Audio Source Connection

Auxiliary Input: 3.5mm jack for external devices. CD Changer: Compatible with Kenwood KDC-C669.

Turn off unit before connecting external devices.
Connect auxiliary cable to rear AUX input port.
For CD changer, connect control cable to changer control port.
Select appropriate source mode to access connected devices.

Tip: Use quality cables for best audio performance.

Playing Media

Supports CD, MP3, WMA formats.

Insert CD: Press EJECT, load disc label-side up.
Play: Unit automatically begins playback; use SEEK for track navigation.
Stop: Press EJECT to remove disc; unit stops playback.
MP3/WMA navigation: Use folder selection for organized files.
Random/Repeat: Press RPT or RDM for playback modes.
Scan: Press SCAN to sample each track briefly.
Fast forward/rewind: Press and hold SEEK buttons.

WARNING! Do not use damaged or irregular-shaped discs.

Security Features

Detachable Faceplate: Remove when parking to deter theft. Security Code: Programmable code to prevent unauthorized use.

Care & Maintenance

Clean with soft, dry cloth only. Avoid chemical cleaners.

CAUTION! Do not insert foreign objects into CD slot. Keep faceplate in protective case when removed.

Regulatory Information

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Wiring/connections	Check fuse, wiring connections, and battery connection.
No sound	Settings/speakers	Check volume, mute, speaker connections, fader settings.
CD won't play	Disc/loading	Check disc for damage, ensure proper insertion, clean lens.
Poor radio reception	Antenna	Ensure antenna connected properly, check antenna condition.
Remote not working	Batteries/obstructions	Replace batteries, ensure clear line of sight to unit.

Reset: Disconnect power for 1 minute to reset unit.

Service: Contact authorized Kenwood service center for repairs.