eppfun QCC3086 Bluetooth 5.4 Audio Transmitter User Manual

1. Introduction

The eppfun QCC3086 Bluetooth 5.4 Audio Transmitter is designed to convert wired audio signals into wireless Bluetooth audio. Utilizing the Qualcomm QCC3086 chip and Bluetooth 5.4 technology, it supports aptX, aptX Adaptive, and LC3 audio codecs for high-fidelity sound transmission. This device offers both Classic Bluetooth and Auracast broadcast modes, allowing for versatile audio sharing with headphones, speakers, and other compatible devices.

Its OLED display provides real-time status information, and multiple input/output ports ensure broad compatibility with various audio sources.

2. Package Contents

Please check the package for the following items:

• eppfun QCC3086 Bluetooth 5.4 Audio Transmitter
• USB-C Power Cable
• Optical Audio Cable
• 3.5mm AUX Audio Cable
• RCA to 3.5mm Audio Cable
• User Manual

Note: Specific cable types and quantities may vary. Refer to your product packaging for exact contents.

3. Product Overview

Familiarize yourself with the device's components and ports.

Figure 3.1: Rear view of the eppfun QCC3086 transmitter showing input and output ports. From left to right: AUX IN, OPTICAL IN, USB-C power input, OPTICAL OUT, AUX OUT, and a switch for AUX/OPT/USB input selection.

Figure 3.2: Front view of the eppfun QCC3086 transmitter displaying the OLED screen and control buttons. The screen shows "WELCOME TO eppfun".

3.1. Ports and Controls

• OLED Display: Shows connection status, active codec, working mode, and Auracast password.
• Power Button: Turns the device on/off.
• Mode Button: Switches between Classic Bluetooth and Auracast modes.
• Pairing Button: Initiates Bluetooth pairing.
• AUX IN: 3.5mm audio input.
• OPTICAL IN: Digital optical audio input.
• USB-C: Power input (5V=500mA).
• OPTICAL OUT: Digital optical audio output (for bypass function).
• AUX OUT: 3.5mm audio output (for bypass function).
• Input Selector Switch: Selects between AUX, OPTICAL, or USB audio input.

4. Setup

4.1. Powering On the Device

1. Connect the provided USB-C cable to the USB-C port on the transmitter.
2. Connect the other end of the USB-C cable to a 5V USB power adapter (not included) or a USB port on your TV/PC.
3. The device will power on automatically or can be turned on by pressing the Power button. The OLED screen will display the startup sequence.

4.2. Connecting to an Audio Source

The transmitter supports AUX, Optical, and USB-C audio inputs. Choose the appropriate cable and port based on your audio source (e.g., TV, PC, gaming console).

1. For AUX Input: Connect a 3.5mm audio cable from your audio source's headphone jack or AUX output to the AUX IN port on the transmitter.
2. For Optical Input: Connect an optical audio cable from your audio source's optical output (e.g., TV's SPDIF/Optical Out) to the OPTICAL IN port on the transmitter.
3. For USB-C Input: Connect a USB-C to USB-A cable from your PC's USB port to the USB-C port on the transmitter. (Note: This port also serves as power input).
4. Use the Input Selector Switch on the transmitter to select the corresponding input source (AUX, OPT, USB).

Figure 4.1: Illustration of connecting different audio sources (RCA/3.5mm, Optical, USB-C) to the transmitter's input ports.

5. Operation

5.1. Switching Broadcast Modes

The eppfun QCC3086 supports two main broadcast modes: Classic Bluetooth and Auracast.

• Press the Mode Button to switch between Classic Bluetooth and Auracast modes. The OLED screen will indicate the active mode.

Figure 5.1: Comparison of Classic Bluetooth (1-to-2 transmit) and Auracast (1-to-N broadcast) connection capabilities.

5.2. Classic Bluetooth Mode (1-to-2 Pairing)

In Classic Bluetooth mode, the transmitter can connect to up to two Bluetooth headphones or speakers simultaneously.

1. Ensure the transmitter is in Classic Bluetooth mode (indicated on the OLED screen).
2. Put your Bluetooth headphones/speaker into pairing mode.
3. Press the Pairing Button on the transmitter. The OLED screen will show "Pairing..." and search for devices.
4. Once connected, the device name will appear on the OLED screen.
5. To connect a second device, put the second Bluetooth headphones/speaker into pairing mode and press the Pairing Button again.

5.3. Auracast Broadcast Mode (1-to-N Broadcast)

Auracast allows broadcasting audio to multiple Auracast-compatible devices (headphones, speakers, hearing aids) simultaneously. This mode supports both public and encrypted broadcasts.

1. Ensure the transmitter is in Auracast mode (indicated on the OLED screen).
2. The OLED screen will display whether the broadcast is public or encrypted. If encrypted, a password will be shown.
3. On your Auracast-compatible receiving device, search for available Auracast broadcasts.
4. Select the eppfun QCC3086 broadcast. If it's encrypted, enter the password displayed on the transmitter's OLED screen.
5. Multiple Auracast devices can connect to the same broadcast.

5.4. Dual Broadcast Modes (24KHz / 48KHz)

The device supports 24KHz and 48KHz broadcast modes. You can switch between these frequencies to optimize for different audio playback demands.

• Refer to the on-screen menu or specific button combinations (if available, not detailed in product info) to switch between 24KHz and 48KHz modes. The OLED screen will display the active frequency.

5.5. Transmitter Bypass Function

The bypass function allows simultaneous wired and wireless audio transmission. This means you can send audio to both wired speakers/soundbars and wireless Bluetooth headphones at the same time.

1. Connect your audio source to the transmitter's input (AUX IN or OPTICAL IN).
2. Connect your wired audio device (e.g., soundbar) to the transmitter's corresponding output (AUX OUT or OPTICAL OUT).
3. Pair your Bluetooth headphones to the transmitter as described in the Classic Bluetooth or Auracast sections.
4. Audio will now be outputted to both the wired and wireless devices.

Figure 5.2: The eppfun QCC3086 transmitter connected to a TV, simultaneously outputting audio to a wired soundbar and wireless headphones.

6. Maintenance

• Keep the device dry. Avoid exposure to moisture or liquids.
• Clean the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Avoid extreme temperatures. Store the device in a cool, dry place.
• Do not attempt to disassemble or repair the device yourself. This will void the warranty.

7. Troubleshooting

7.1. No Power

• Ensure the USB-C power cable is securely connected to both the transmitter and a working power source (5V USB adapter or USB port).
• Try a different USB-C cable or power adapter.
• Verify the power source is active.

7.2. No Audio Output

• Check if the audio source is playing and its volume is turned up.
• Verify the correct input source (AUX, OPT, USB) is selected on the transmitter using the Input Selector Switch.
• Ensure your Bluetooth headphones/speaker are properly paired and connected to the transmitter. The OLED screen should confirm the connection.
• Check the volume level on your receiving Bluetooth device.
• If using optical input, ensure your audio source is set to PCM/Stereo output, not Bitstream/Dolby/DTS, as these are often not supported by simple transmitters.
• Try re-pairing your Bluetooth device.

7.3. Connection Drops or Short Range

• Ensure there are no significant physical obstructions (walls, large furniture) between the transmitter and the receiving device.
• Keep the transmitter and receiving device within the specified 20-meter (65-foot) range in open environments.
• Avoid placing the transmitter near other wireless devices (Wi-Fi routers, microwaves) that may cause interference.
• Re-pair the devices.

7.4. Cannot Pair with a Second Device (Classic Bluetooth)

• Ensure the first device is already connected.
• Put the second device into pairing mode.
• Press the Pairing Button on the transmitter again to search for the second device.
• Some devices may require a specific pairing sequence; refer to your receiving device's manual.

8. Specifications

9. Warranty & Support

9.1. Warranty Information

This eppfun product comes with a 1-year limited warranty from the date of purchase. The warranty covers manufacturing defects in materials and workmanship. It does not cover damage caused by misuse, accident, unauthorized modification, or normal wear and tear.

Please retain your proof of purchase for warranty claims.

9.2. Customer Support

For technical support, warranty inquiries, or further assistance, please contact eppfun customer service through the following channels:

• Email: Refer to the contact information provided on the official eppfun website or your product packaging.
• Website: Visit the official eppfun website for FAQs and support resources.
• Amazon Store: You can also visit the eppfun Store on Amazon for product information and support.

When contacting support, please have your product model (QCC3086) and purchase details ready.