RUIZHI Bluetooth Audio Receiver Board (Model 0242 / VHM-314) User Manual

1. Introduction

The RUIZHI Bluetooth Audio Receiver Board is designed to add wireless audio streaming capabilities to various audio systems, including home stereos, car audio systems, and DIY projects. This compact module supports Bluetooth 4.1 for stable and high-quality audio transmission.

This manual will guide you through the setup, operation, and maintenance of your Bluetooth audio receiver board.

2. Product Features

• Wireless Stereo Amplifier: Integrates wireless streaming into existing speakers, home amplifiers, or receivers.
• High Sound Quality: Equipped with a true Bluetooth 4.1 audio decoder chip and a 3.5mm stereo dual-channel headphone audio interface for clear sound.
• Flexible Power Supply: Supports universal Micro USB 5V power supply and external 3.7-5V power conversion.
• Multiroom Streaming Support: Compatible with multiple Arylic devices on the same network for audio streaming via smartphone or tablet.
• Lossless Audio Support: Supports MP3, APE, FLAC, WAV audio file formats.
• Bluetooth Profiles: Supports A2DP / AVCTP / AVDTP / AVRCP / HFP profiles.
• Compact Design: Ultra-small volume, ready to use for DIY projects.

Figure 1: RUIZHI Bluetooth Audio Receiver Board (VHM-314) with key features.

3. Package Contents

The package includes:

• 2 x RUIZHI Bluetooth 4.1 MP3 Decoder Boards

4. Specifications

Figure 2: Dimensions of the RUIZHI Bluetooth Audio Receiver Board.

5. Setup and Connections

Follow these steps to set up your RUIZHI Bluetooth Audio Receiver Board:

1. Power Supply: Connect the board to a 5V Micro USB power source (e.g., a phone charger, power bank, or 5V car charger). Alternatively, you can use an external 3.7-5V power supply by connecting it to the designated power pads.
2. Audio Output: Connect the 3.5mm stereo audio output interface to your desired audio device, such as headphones, an amplifier, or car AUX input.
3. Power On: Once power is supplied, the blue LED indicator will light up, indicating the board is in Bluetooth mode.

Figure 3: Detailed view of the board's components and connections.

Figure 4: Example connection scenarios for the Bluetooth Audio Receiver Board.

6. Operating Instructions

Once the board is powered on and the blue indicator is lit, it enters Bluetooth pairing mode.

1. Pairing: On your mobile phone or other Bluetooth-enabled device, search for Bluetooth devices. The device name for the decoder board will appear as "XY_BT".
2. Connect: Select "XY_BT" to connect. You will hear an English voice prompt "The Bluetooth device is successfully connected," indicating a successful connection.
3. Play Music: After successful connection, you can start playing music from your connected device.

Figure 5: Controlling the Bluetooth Audio Receiver Board via a mobile application.

Figure 6: The Bluetooth Audio Receiver Board enhancing a home audio system.

7. Maintenance

To ensure the longevity and optimal performance of your RUIZHI Bluetooth Audio Receiver Board, follow these maintenance guidelines:

• Keep Dry: Avoid exposing the board to moisture or liquids, as this can cause damage to electronic components. The product is not water-resistant.
• Clean Gently: If cleaning is necessary, use a soft, dry cloth. Do not use harsh chemicals or abrasive materials.
• Handle with Care: The board contains delicate electronic components. Avoid dropping or subjecting it to strong impacts.
• Proper Storage: When not in use for extended periods, store the board in a cool, dry place away from direct sunlight and extreme temperatures.

8. Troubleshooting

If you encounter issues with your Bluetooth Audio Receiver Board, refer to the following common problems and solutions:

• No Power:
  • Ensure the Micro USB cable is securely connected to a 5V power source.
  • If using external 3.7-5V power, verify the connections are correct and the power source is active.
  • Check if the blue LED indicator lights up when powered.
• Cannot Pair with Device:
  • Make sure the board is powered on and the blue LED is blinking or solid (indicating pairing mode).
  • Ensure Bluetooth is enabled on your mobile device.
  • Move your mobile device closer to the receiver board (within 15 meters).
  • Try restarting both the receiver board and your mobile device.
  • Check if other Bluetooth devices are interfering.
• No Audio Output:
  • Verify that the 3.5mm audio cable is correctly connected to both the receiver board and your audio output device (headphones, amplifier, etc.).
  • Ensure the volume on both your connected device and the audio output device is turned up.
  • Confirm that your mobile device is successfully paired and playing music.
  • Test with different audio cables or output devices if possible.
• Poor Sound Quality / Disconnections:
  • Ensure there are no significant obstacles between the receiver board and your Bluetooth device.
  • Move away from sources of strong electromagnetic interference (e.g., Wi-Fi routers, microwaves).
  • Keep the distance between the devices within the recommended 15-meter range.
  • Check if your audio source file is of good quality.

9. Warranty and Support

This RUIZHI product comes with a limited warranty. For specific warranty terms and conditions, please refer to the purchase documentation or contact your retailer.

For technical support or further assistance, please contact RUIZHI customer service or visit the official RUIZHI website. Please have your product model number (0242 / VHM-314) and purchase details ready when seeking support.

Manufacturer: RUIZHI

ASIN: B08T1CY5L6