ZK-QCC QCC5125/QCC3034 Bluetooth 5.1 Lossless Decoder Board User Manual

1. Product Overview

The ZK-QCC QCC5125/QCC3034 Bluetooth 5.1 Lossless Decoder Board is designed for audiophiles seeking high-quality wireless audio. This board features advanced Qualcomm Bluetooth chips (QCC5125 or QCC3034) and a PCM5102A DAC chip, delivering lossless audio transmission and decoding with exceptional dynamic range and low distortion. It supports various audio codecs including SBC, AAC, APTX, APTX-LL, APTX-HD, and LDAC (QCC5125 version).

2. Key Features

• Advanced Bluetooth Connectivity: Features QCC5125 (Bluetooth 5.1) or QCC3034 (Bluetooth 5.0) chips for stable and high-quality wireless audio.
• Lossless Audio Decoding: Utilizes PCM5102A DAC chip for 32-bit, 384KHz sampling rate, ensuring pristine audio reproduction.
• Wide Codec Support: Supports SBC, AAC, APTX, APTX-LL, APTX-HD. The QCC5125 version additionally supports LDAC.
• High Performance: Dynamic range of 112dB, signal-to-noise ratio of 112dB, and distortion of -93dB.
• Flexible Connectivity: Includes I2S output, TYPE-C USB for PC sound card or power, and dedicated audio input/output ports.
• User-Friendly Design: Comes with a complimentary acrylic shell and magnetic attachment for easy assembly and installation.
• Quality Components: Equipped with fever-grade capacitors (ELNA, KingBox, Nichicon) for enhanced sound quality and longevity.

3. Package Contents

• Lossless Decoding Board (QCC3034 or QCC5125 version) x 1
• XH2.54-2P Power Cable x 1
• XH2.54-3P Shielded Wire x 2
• Acrylic Shell components (for self-assembly)
• Magnetic column and screws for assembly

Note: USB and audio cables are not included in the shipment.

4. Setup Instructions

4.1. Assembly of Acrylic Shell

1. Carefully unpack all components.
2. Place the motherboard on a flat, stable surface.
3. Align the acrylic top plate with the standoffs on the motherboard.
4. Secure the acrylic shell using the provided 3*4 screws and M3*14+4 copper pillars. The magnetic columns attach to the bottom of the board.

4.2. Power Supply Connection

• The board requires a DC power supply in the range of 8-32V.
• IMPORTANT: AC power supply is NOT supported. Using AC power will damage the device.
• Connect the provided XH2.54-2P power cable to the 'Power supply DC8-32V' input on the board and to your DC power source.

4.3. Audio Connections

• Audio Output: Connect the audio output port of the decoder board to the audio input port of your power amplifier or front stage board.
• Audio Input (AUX): For external audio sources (e.g., mobile phones, TV boxes), connect them to the audio input port using appropriate cables.
• USB Sound Card/Power: A TYPE-C USB interface is available for use as a PC sound card or for USB power supply.
• I2S Output: An I2S output interface is available for connection to power amplifiers with I2S input functionality.

4.4. External Button Connection (Optional)

The board features a button extension interface for controlling playback and volume. Connect external buttons as shown in the wiring diagram:

• NEXT/VOL+: Connect to pin 1.
• PREV/VOL-: Connect to pin 2.
• PLAY/PAUSE: Connect to pin 3.
• COM (Common Ground): Connect to pin 4.

4.5. External Antenna (Optional)

The board has an on-board Bluetooth antenna with an open transmission distance of approximately 50 meters. If you install the board in a metal enclosure, which can cause signal shielding, you may need an external antenna. The board reserves an IPEX antenna base for this purpose.

5. Operating Instructions

5.1. Bluetooth Pairing

1. Ensure the decoder board is powered on.
2. On your audio source device (e.g., smartphone, tablet), enable Bluetooth and search for available devices.
3. Select 'WUZHI AUDIO' from the list of devices to pair.
4. Once paired, audio will be streamed wirelessly to the decoder board.

5.2. Input Switching

The board automatically switches between AUX and Bluetooth inputs using a signal relay. Bluetooth takes priority. If a Bluetooth connection is active, the board will use the Bluetooth input. If Bluetooth is not connected, it will automatically switch to the AUX input.

5.3. Button Functions (if external buttons are connected)

• NEXT/VOL+: Short press for next track, long press for volume up.
• PREV/VOL-: Short press for previous track, long press for volume down.
• PLAY/PAUSE: Press to play or pause audio playback.

6. Maintenance

• Keep the device in a dry environment to prevent moisture damage.
• Avoid exposing the board to extreme temperatures or direct sunlight.
• Clean the acrylic shell and board gently with a soft, dry cloth. Do not use harsh chemicals or abrasive materials.
• Ensure proper ventilation if the board is enclosed to prevent overheating.

7. Troubleshooting

• No Power: Ensure the DC power supply is within the 8-32V range and correctly connected. Verify that AC power is not being used.
• No Bluetooth Connection: Check if the board is powered on. Ensure 'WUZHI AUDIO' is selected on your device. Try restarting both the board and your audio source device.
• Poor Bluetooth Range/Signal: If the board is installed in a metal enclosure, consider installing an external antenna via the reserved IPEX connector to improve signal reception.
• No Audio Output: Verify all audio cables are securely connected. Check the input source priority (Bluetooth takes precedence over AUX). Ensure the connected amplifier/speaker is powered on and functioning.
• Advanced EQ Operations (QCC5125 only): For experienced users with a software foundation, official software can be connected via USB to perform EQ operations on the internal DSP. This requires specific technical knowledge.

8. Specifications

9. User Tips

• Embrace Lossless Audio: This board is designed for lossless audio. Ensure your audio source and files are of high quality (e.g., FLAC, WAV, or high-bitrate streaming with LDAC/aptX HD) to fully appreciate its capabilities.
• Consider an External Antenna: If you plan to house the board in a metal case, an external antenna is highly recommended to prevent signal degradation and maintain optimal Bluetooth range.
• DIY Assembly: The acrylic shell requires self-assembly. Take your time and follow the installation diagram for a secure fit.
• Advanced Customization (QCC5125): For users with a strong understanding of audio DSP, the QCC5125 model offers the potential for EQ adjustments via official software and USB connection. Proceed with caution and adequate knowledge.

10. Frequently Asked Questions (FAQ)

Q: What is the practical use of this item?

A: This item is a Bluetooth audio decoder board, primarily used to add high-quality wireless audio streaming capabilities to existing audio systems, such as power amplifiers or active speakers. It allows you to stream audio from your phone or other Bluetooth devices with superior sound fidelity, especially with lossless codecs.

Q: Can I use an AC power adapter?

A: No, the board explicitly states that AC power supply is not supported. You must use a DC power supply within the 8-32V range.

Q: How do I switch between Bluetooth and AUX inputs?

A: The board features automatic input switching. Bluetooth takes priority. If a Bluetooth device is connected, it will use Bluetooth. If no Bluetooth device is connected, it will automatically switch to the AUX input.

11. Warranty and Support

For warranty information and technical support, please contact the seller directly through your purchase platform. Keep your order details handy for faster assistance.