Sony MDS-SP55 Car Stereo Manual

The Sony MDS-SP55 is an in-dash MiniDisc car stereo system featuring MDLP (MiniDisc Long Play) recording and playback, AM/FM tuner with 30 station presets, CD changer control, anti-shock memory, wireless remote capability, and a detachable faceplate for security. It supports playback of standard and MDLP-recorded discs, offers various sound adjustment modes, and is designed for 12V DC vehicle electrical systems. 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 MiniDisc Media 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Main unit with detachable faceplate, Wireless Remote Control, MiniDisc mechanism, AM/FM tuner, Pre-out connectors, Antenna input, CD changer control port.

Feature	Description
MDLP (MiniDisc Long Play)	Allows extended recording (LP2, LP4 modes)
AM/FM Tuner	30 station presets (18 FM, 12 AM)
Anti-Shock Memory	Buffer memory for skip-free playback
Detachable Faceplate	Security feature to prevent theft
CD Changer Control	Controls compatible Sony CD changers
Pre-out Connectors	Front/Rear/Subwoofer outputs for external amps
Wireless Remote	Included for convenient control
Sound Adjustment	EQ presets (Rock, Pop, Jazz, etc.) and custom settings
Display Dimmer	Adjusts display brightness for night driving
Power Source	12V DC, negative ground vehicle electrical system

Installation

Unpack and inspect contents. Ensure vehicle is turned off.

Disconnect vehicle battery: Remove negative terminal for safety.
Prepare dashboard: Remove existing stereo (if any) using proper tools.
Connect wiring harness: Match colors (red=ignition, yellow=battery, black=ground).
Connect antenna: Plug vehicle antenna cable into rear port.
Connect external devices: Attach pre-out cables to amplifiers if used.
Secure unit: Slide into dashboard opening and secure with mounting sleeve.
Reconnect battery and test.

WARNING! Installation requires knowledge of vehicle electrical systems. Incorrect wiring can cause damage or fire. Consult a professional if unsure.

First-Time Setup

Power on the unit; ignition key must be in ACC or ON position.

Set 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) to store.
Adjust sound settings: Use SOUND button to cycle through EQ presets or enter custom mode.
Set display dimmer: Press DIMMER to adjust brightness for day/night.
Detach faceplate: Press RELEASE button and store securely when leaving vehicle.

CAUTION! Do not operate the unit while driving if it distracts you. Set all controls before driving.

Specifications

Audio Format: MiniDisc (standard & MDLP), CD-DA control.
Tuner: AM/FM with 30 presets.
Output Power: 50W x 4 (max), 20W x 4 (RMS).
Pre-out: 3 pairs (Front, Rear, Subwoofer) at 2V.
Frequency Response: 20Hz - 20kHz.
Signal-to-Noise Ratio: >100dB.
Power Requirements: 12V DC (negative ground).
Dimensions (Main Unit): 178mm (W) x 50mm (H) x 160mm (D).
Operating Temperature: 0°C to 40°C (32°F to 104°F).

Controls and Settings

Front Panel: POWER/VOLUME knob, SOURCE, SOUND, BAND, OPEN/CLOSE (for disc), Number buttons, TUNE/SEEK, DISP/DIMMER.

Remote: POWER, Number buttons, VOLUME, SOURCE, PLAY/PAUSE, STOP, TUNE/SEEK, SOUND, DISP.

Sound Settings: EQ presets (ROCK, POP, JAZZ, CUSTOM), Bass/Treble adjustment, Loudness (On/Off), Fader/Balance. Tuner: Manual/Seek tuning, Local/DX reception setting. Display: Clock, Track/Time, Dimmer levels. MD Functions: Record, Edit (Title, Divide, Combine, Erase), Playback modes (Repeat, Shuffle).

Connecting Devices

Antenna: Standard vehicle antenna cable. External Amplifiers: Use pre-out RCA cables. CD Changer: Connect compatible Sony CD changer via control bus cable.

Ensure vehicle is off and battery disconnected before making connections.
Match RCA cable colors (white=left, red=right) to amplifier inputs.
Connect CD changer control cable to designated port on rear of unit.
Select source via SOURCE button (MD, TUNER, CD).

Tip: Use high-quality shielded cables for pre-out connections to minimize noise.

Playing MiniDisc Media

Supports playback of pre-recorded and home-recorded MiniDiscs (standard & MDLP).

Insert disc: Press OPEN/CLOSE, load MiniDisc with label facing up.
Play: Press PLAY; use TUNE/SEEK or Number buttons to select track.
Pause: Press PLAY/PAUSE; press again to resume.
Stop: Press STOP.
Skip: Press TUNE/SEEK left/right for previous/next track.
Repeat/Shuffle: Press corresponding buttons during playback.
Recording from tuner/CD: Select source, press REC and PLAY simultaneously.
Editing: Use EDIT button to title tracks, divide, combine, or erase.

WARNING! Do not insert damaged or non-standard discs. Do not expose discs to direct sunlight or high heat.

Accessibility Features

Display Brightness: Adjustable via DIMMER for varying light conditions. One-Touch Presets: Quick access to favorite radio stations. Loudness Control: Enhances bass at low volumes for better audibility.

Care & Cleaning

Detach faceplate before cleaning. Use soft, dry cloth for unit and faceplate. For lens cleaning (if playback issues arise), use approved MiniDisc lens cleaner only.

CAUTION! Do not use solvents, chemicals, or compressed air. Do not spray liquids onto the unit.

Regulatory Information

FCC Part 15: Class B digital device; complies with limits for vehicle use. This device complies with Part 15 of the FCC Rules. Copyright © Sony Corporation. All trademarks are property of their respective owners. For support, visit www.sony.com/electronics/support or contact Sony Customer Service at 1-800-222-7669.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Unit does not power on	Power/Battery connection	Check fuse; verify wiring harness connections (red/yellow/black); ensure battery is connected.
No sound from speakers	Speaker wiring/Source	Check speaker wires for shorts/opens; ensure source is selected correctly; check fader/balance settings.
Disc will not play	Disc/Dirty lens	Ensure disc is inserted correctly (label up); try a different disc; use lens cleaner if needed.
Poor radio reception	Antenna connection	Ensure antenna cable is securely plugged in; check antenna for damage; set tuner to LOCAL mode.
Remote does not work	Batteries/Obstruction	Replace batteries; ensure clear line of sight to unit's front panel; remove protective film from remote.
Recording not working	Disc/Write-protect	Use recordable MD disc; ensure disc write-protect tab is set to record.

Reset: Disconnect vehicle battery for 1 minute to reset unit memory (will erase presets and clock).

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