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Operating Instructions
Portable Stereo CD System
Model No. RX-D552
RX-D550
Thank you for purchasing this product.
Please read these instructions carefully before using this product, and save this manual for future use.
TQBJ2300
E

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Summarization of Contents

Product Information and Accessories
Operating Instructions Overview
Explains how descriptions are presented and model applicability.
Included Accessories List
Lists the accessories provided with the unit.
Safety Precautions
Unit and Placement Safety
Covers fire, shock, damage risks for the unit and placement.
Battery and Mains Lead Safety
Details safe handling, disposal, and precautions for batteries and power cords.
Fuse Replacement Procedure
Step-by-step guide for replacing the fuse in the AC mains plug.
Regulatory Compliance and Disposal
Declaration of Conformity (DoC)
Declares product compliance with EU directives and provides download link.
Proper Disposal of Electronics and Batteries
Provides instructions for proper disposal of electronics and batteries in the EU.
Licensing and Trademark Notices
Notes trademarks and licensing for Bluetooth® word marks and logos.
Unit Controls and Operation
Main Unit Control Layout
Identifies and describes the buttons and indicators on the main unit.
Remote Control Functions
Identifies and describes the buttons on the remote control.
Powering the Device
Using AC Mains Power
Instructions for connecting the unit to AC power.
Using Battery Power
Details on installing and using batteries for portable operation.
Battery Indicator and Removal
Explains battery level indication and proper removal procedure.
Special Functions
DEMO Play Mode Activation
How to activate and use the unit's demonstration music playback.
Media Handling
Inserting and Removing Discs
Step-by-step guide for handling CD discs.
Connecting and Using USB Devices
Instructions for connecting and using USB storage devices.
Bluetooth® Operations
Bluetooth® Technology Overview
Information on frequency band, certification, restrictions, range, and interference.
Pairing and Connecting Bluetooth® Devices
Detailed steps for pairing new and connecting existing Bluetooth® devices.
Adjusting Bluetooth® Transmission and Input
Adjusting transmission mode and input level for optimal Bluetooth® audio.
Disconnecting Bluetooth® Devices
Procedures for disconnecting a paired Bluetooth® device.
Playback Controls
Source Selection and Basic Playback
How to choose audio sources and start basic playback.
Playback Modes and Repeat Functions
Options for play modes like random, single track, or album playback.
Displaying Media Information
How to view track, artist, and other metadata for media playback.
Radio Tuning and Reception
DAB/DAB+ Station Listening (D552)
Guide for tuning, memorizing, and listening to digital radio stations.
FM Radio Station Tuning
Instructions for tuning, preset, and manual selection of FM radio.
DAB Signal Quality and Manual Tuning
Checking signal strength and manually tuning DAB/DAB+ frequency blocks.
FM Signal Status and RDS Data
Displaying FM reception status and Radio Data System text.
Sound and Timer Settings
Sound Adjustment Features
Using Preset EQ and Sound Booster for audio enhancement.
Clock Setting and Adjustment
How to set, check, and automatically update the unit's clock.
Sleep and Play Timer Configuration
Setting timers to turn the unit off or on automatically.
System Configuration
Auto Off and Bluetooth® Standby
Configuring automatic standby and Bluetooth® wake-up features.
Remote Code and Software Updates
Changing remote codes and checking for system software updates.
Media Compatibility and Care
Supported Media Formats
Details on supported CD and USB file formats and capacities.
Cleaning and Maintenance
Guidelines for cleaning the unit, speaker covers, and discs.
Disc Handling and Unit Disposal
Precautions for handling discs and instructions for unit disposal.
Troubleshooting and Error Resolution
Factory Reset Procedure
Procedure to restore the unit to its original factory settings.
Common Operational Problems
Solutions for common issues like no sound, power, or humming.
Media and Remote Malfunctions
Troubleshooting steps for disc, USB, and remote control issues.
Radio Reception Issues
Advice for poor DAB/DAB+ or noisy FM reception.
Advanced Troubleshooting and Messages
Bluetooth® Connectivity Problems
Solutions for pairing failures, connection errors, and audio interruptions.
Understanding Display Messages
Explanations for various messages and error codes displayed by the unit.
Technical Specifications
General and Power Specifications
Details on power consumption, supply, and battery life.
Disc, Speaker, and Terminal Specs
Technical data for the CD playback, speaker, and input/output terminals.
Bluetooth® and Amplifier Specifications
Details on Bluetooth® version, profiles, and audio output power.
Tuner and DAB Specifications
Technical data for FM and DAB/DAB+ tuner sections.
Customer Support and Contact
Sales and Support Information
Information for contacting customer support and ordering accessories in the UK and Ireland.

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