kenwood kdc 248u manual pdf

The Kenwood KDC-248U is a single DIN car stereo receiver with CD/MP3/WMA playback, USB direct control, front AUX input, 50W x 4 max power output, detachable faceplate security, variable color illumination, and preset EQ settings. Below are key sections for features, installation, operation, settings, troubleshooting, and specifications.

1. Features at a Glance 2. Installation 3. Basic Operation 4. Specifications 5. Controls and Settings 6. USB and AUX Connection 7. Playback Functions 8. Audio Settings 9. Security Features 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: CD/MP3/WMA playback, USB direct control, front AUX input, detachable faceplate, variable color display.

Feature	Description
CD/MP3/WMA playback	Plays CDs, MP3, and WMA formatted discs
USB direct control	Front USB port for flash drives and devices
Front AUX input	3.5mm auxiliary input for external audio sources
Detachable faceplate	Security feature to prevent theft
Variable color illumination	Adjustable display colors to match vehicle interior
50W x 4 max power	High power output for clear audio
Preset EQ	Multiple equalizer settings for different music types
Radio tuner	AM/FM tuner with 18 FM/6 AM presets
Remote control ready	Compatible with optional remote control
Clock display	Digital clock with time setting

Installation

Proper installation ensures optimal performance and safety.

Disconnect negative battery terminal before installation.
Remove existing stereo from dashboard using removal tools.
Connect wiring harness following color-coded wiring diagram.
Connect antenna cable and ground wire to chassis.
Slide unit into dashboard and secure with mounting sleeve.
Reconnect battery and test all functions.

WARNING! Always disconnect battery before installation to prevent electrical shorts. Ensure proper grounding.

Basic Operation

Power on unit and familiarize yourself with basic controls.

Power: Press SRC/OFF button to turn on/off.
Source selection: Press SRC to cycle through CD, USB, AUX, Tuner modes.
Volume control: Turn VOL knob to adjust volume level.
Mode selection: Use function buttons for different audio sources.
Display: Press DISP to change display information.

CAUTION! Do not operate controls while driving. Park vehicle safely before adjusting settings.

Specifications

Power Output: 50W x 4 max (22W x 4 RMS)
CD Formats: CD, CD-R, CD-RW, MP3, WMA
USB Support: USB flash drives, MP3 players
Tuner Sensitivity: FM 10.8 dBf, AM 27 μV
Preset Stations: 18 FM, 6 AM
Frequency Response: 20Hz - 20kHz
Signal-to-Noise: 80 dB
Dimensions: 178mm(W) x 50mm(H) x 153mm(D)
Power Requirement: 12V DC negative ground

Controls and Settings

Front panel controls: SRC/OFF, VOL knob, function buttons, USB port, AUX input.

Main Controls: SRC (source selection), VOL (volume), BAND (radio band), SEEK/TUNE, MUTE, DISP (display mode).

Audio Settings: BASS, TREBLE, BALANCE, FADER, LOUDNESS, EQ presets (POP, ROCK, JAZZ, etc.). System Settings: Clock setting, display color, beep tone, demo mode, reset function.

USB and AUX Connection

USB port supports flash drives and compatible devices. AUX input for external audio sources.

USB connection: Insert USB device into front USB port.
AUX connection: Connect 3.5mm audio cable to front AUX input.
Select source: Press SRC until USB or AUX mode displays.
Navigation: Use folder and track buttons to browse files.

Tip: Format USB drives as FAT32 for best compatibility. Maximum capacity 32GB recommended.

Playback Functions

Supports various playback modes for different media types.

CD playback: Insert CD, unit automatically begins playback.
Track selection: Use SEEK buttons or number keys for direct access.
Repeat: Press RPT for track/folder repeat modes.
Random: Press RDM for random track playback.
Scan: Press SCAN to sample each track briefly.
Fast forward/rewind: Press and hold SEEK buttons.
Folder navigation: Use folder buttons for MP3/WMA file structure.
Text display: Shows file names and ID3 tag information.

WARNING! Do not use damaged or irregular shaped CDs. Keep discs clean and free of scratches.

Audio Settings

Comprehensive audio adjustment options for optimal sound quality.

Setting	Function	Range
BASS	Adjust low frequency response	-7 to +7
TREBLE	Adjust high frequency response	-7 to +7
BALANCE	Left/right speaker balance	L8 to R8
FADER	Front/rear speaker balance	F8 to R8
LOUDNESS	Boost low frequencies at low volume	On/Off
EQ PRESET	Pre-set equalizer curves	FLAT, POP, ROCK, etc.

Security Features

Detachable faceplate security system and code protection.

Faceplate removal: Press release button and slide faceplate off.
Security code: Set 4-digit code in system settings menu.
Code entry: Enter code if unit loses power or is disconnected.
Theft deterrent: Unit inoperable without faceplate or correct code.

Important: Record security code in safe place. Contact dealer if code is lost.

Regulatory Information

FCC Part 15: Class B digital device compliant. CE marked for European compliance. Manufactured under ISO 9001 quality standards. Copyright © Kenwood Corporation. For technical support, visit www.kenwood.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Wiring/fuse	Check fuse, wiring connections, and battery connection
No sound	Mute/speakers	Check mute function, speaker connections, and volume level
CD won't play	Disc/format	Check disc for damage, ensure compatible format
USB not recognized	Format/device	Reformat USB as FAT32, try different device
Poor radio reception	Antenna/position	Check antenna connection, reposition vehicle
Unit locked	Security code	Enter correct 4-digit security code

Reset: Disconnect battery for 1 minute to reset unit (security code required after reset).

Service: Contact authorized Kenwood service center for repairs.