DAJUNGUO ZK-3002T 300W+300W Bluetooth Digital Amplifier Board Instruction Manual

1. Introduction

The DAJUNGUO ZK-3002T is a high-performance 2.0 channel Bluetooth digital amplifier board featuring the TPA3255 chip. It delivers a peak output power of 300W + 300W, designed for audio enthusiasts seeking powerful and clear sound reproduction. This amplifier board supports multiple input methods including Bluetooth, AUX, and USB, making it versatile for various audio sources. Its robust design includes a thickened heat sink and a large cooling fan to ensure efficient heat dissipation and stable performance during extended use. This manual provides detailed instructions for setup, operation, and maintenance of your ZK-3002T amplifier board.

2. What's in the Box

• ZK-3002T Amplifier Board

Image: The ZK-3002T amplifier board, showcasing its components and compact design.

3. Product Overview

Familiarize yourself with the various components and connection points of the ZK-3002T amplifier board.

Image: Detailed diagram of the ZK-3002T amplifier board, labeling key components such as power input, speaker outputs, USB port, LINE IN, expansion ports, bass, treble, and main volume controls.

• Power Input (18-50V DC): Connect your DC power supply here.
• Left/Right Speaker Outputs: Connect your passive speakers.
• USB Flash Drive Port: For USB audio input.
• LINE IN (3.5mm audio port): For AUX audio input.
• Expansion Port 1 & 2: For connecting external audio devices like microphone front stage boards.
• Bass, Treble, Main Volume Knobs: For audio adjustment.
• Dedicated Inductors: For high power digital amplification.
• Heat Sink and Cooling Fan: Ensures thermal stability.

4. Setup Instructions

1. Power Supply Connection:

   Connect a DC power supply with a voltage between 18V and 50V to the power input terminals. Ensure correct polarity. A 10A or above current is recommended for optimal performance.

2. Speaker Connection:

   Connect your passive speakers to the Left and Right speaker output terminals. Ensure secure connections and correct polarity for each speaker.

3. Audio Input Selection:

   The ZK-3002T supports Bluetooth, AUX (3.5mm LINE IN), and USB input. Select your preferred input method:

   • Bluetooth: Power on the board, and it will automatically enter Bluetooth pairing mode. Search for "ZK-3002T" on your device and connect.
   • AUX: Connect your audio source (e.g., phone, laptop, TV) to the 3.5mm LINE IN port using an audio cable.
   • USB: Insert a USB flash drive (FAT32 format) into the USB port. The board will automatically detect and play audio files.
   

   Image: The ZK-3002T amplifier board highlighting its Bluetooth, 3.5mm AUX, and USB input options.

4. Expansion Ports (Optional):

   The board features Expansion Port 1 and Expansion Port 2 for advanced configurations, such as connecting to a microphone front stage board for reverb input/output. If using these ports, it is necessary to remove the three 0 ohm resistors (R38, R32, and R30) as indicated in the product diagram for proper functionality.

   

   Image: Diagram illustrating the location of Expansion Port 1 and 2, and the specific 0 ohm resistors (R38, R32, R30) that need to be removed when utilizing these ports.

5. Operating Instructions

1. Power On/Off:

   After connecting the power supply, the board will power on. The main volume knob can be long-pressed to turn the unit on or off.
2. Volume Control:

   Adjust the main volume knob to control the overall audio output level.

3. Tone Adjustment:

   Use the Bass and Treble knobs to fine-tune the low and high frequencies of your audio, allowing for a more personalized sound experience.

4. Playback Control (USB/Bluetooth):

   When using USB or Bluetooth input, a single click of the main volume knob will pause/play the audio. Double-click for the next track, and triple-click for the previous track.

Demonstration Video:

Video: A demonstration of the ZK-3002T amplifier board's features, including connection and operation with speakers and a mobile device.

6. Maintenance

• Heat Dissipation: The amplifier board is equipped with a thickened heat sink and a cooling fan. Ensure the fan is free from obstructions and clean any dust buildup regularly to maintain optimal cooling performance.
• Cleaning: Use a soft, dry cloth to clean the surface of the amplifier board. Avoid using liquid cleaners or solvents.
• Storage: When not in use for extended periods, store the amplifier board in a dry, dust-free environment.
• Handling: Handle the board with care to avoid damaging electronic components.

Image: A close-up view of the ZK-3002T's thickened heat sink and silent cooling fan, designed for efficient heat dissipation.

7. Troubleshooting

8. Specifications

Key technical specifications for the ZK-3002T amplifier board:

Image: A visual summary of the ZK-3002T's technical specifications, including power output and voltage range.

• Chip: TPA3255 HIFI Chip
• Output Peak Power: 300W + 300W
• Working Voltage Range: 18-50V DC (Recommended: 36-48V DC, 10A or above)
• Channels: 2.0 (Left Channel + Right Channel)
• Input Methods: Bluetooth (JL 5.3, 10m transmission distance), AUX (3.5mm), USB Disk/Sound Card
• Protection Mechanisms: Input undervoltage, overheating, overcurrent, short circuit protection. No input anti-reverse protection.
• Product Dimensions: 5.35 x 3.93 x 1.49 inches (136 x 100 x 38mm)
• Item Weight: 12.63 ounces

9. Warranty and Support

DAJUNGUO is committed to customer satisfaction. If you encounter any questions about the product or experience quality issues, please contact our customer service team. We offer 24/7 after-sales service and aim to provide a 100% satisfactory answer to your inquiries.

For support, please refer to the contact information provided with your purchase or visit the official DAJUNGUO store on Amazon.

Note: This instruction manual is subject to change without prior notice. Please refer to the latest version available from the manufacturer.