DollaTek ZK-1002L Mini HIFI Bluetooth 5.0 Power Amplifier Board User Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of your DollaTek ZK-1002L Mini HIFI Bluetooth 5.0 Power Amplifier Board. Please read this manual thoroughly before use to ensure proper functionality and to prevent damage to the device or connected components.

2. Product Overview

2.1 Key Features

• Bluetooth 5.0 for higher transmission efficiency and extended range (up to 15 meters unobstructed).
• High power output: Up to 100W per channel (2.0 stereo).
• Integrated volume potentiometer with power switch for easy control.
• Efficient heat dissipation with a large black-gold heatsink.
• Robust copper DC connector for high current resistance.
• Stable power delivery with 4*470uF green gold capacitors for superior sound quality.
• Built-in protection mechanisms: Overheating and short-circuit protection.

2.2 Package Contents

The package typically includes the following components:

• 1 x DollaTek ZK-1002L HIFI Power Amplifier Board
• 1 x Top Protective Plate
• 1 x Bottom Protective Plate
• 1 x Volume Knob
• 1 x DC Power Cable
• 1 x Screwdriver
• Set of Screws and Standoffs
• 1 x Washer
• 1 x Nut

3. Setup and Installation

3.1 Component Identification

3.2 Assembly

1. Carefully align the protective plates with the amplifier board.
2. Insert the standoffs through the designated holes and secure them with the provided screws.
3. Attach the volume knob to the potentiometer shaft.

3.3 Power Supply Connection

The ZK-1002L requires a DC power supply between 5V and 24V. For optimal performance and higher power output, a higher voltage adapter (e.g., 9V, 12V, 15V, 18V, or 24V) is recommended.

• Connect the DC power cable to a compatible power adapter (not included).
• Plug the DC connector into the DC IN port on the amplifier board. Ensure the connection is firm.
• Always ensure correct polarity when connecting the power supply.

3.4 Speaker Connection

The amplifier supports speakers with an impedance of 4Ω to 8Ω and a power rating of 50W to 300W.

• Identify the speaker terminals labeled 'R+' 'R-' (Right Channel) and 'L+' 'L-' (Left Channel).
• Connect your speakers to the corresponding terminals. Ensure correct positive (+) and negative (-) polarity for each speaker to avoid phase issues and ensure optimal sound quality.
• Use appropriate gauge speaker wire for your setup.

4. Operating Instructions

4.1 Power On/Off

The volume potentiometer on the board also functions as a standby switch. Turn the knob clockwise to power on the amplifier. Turn it counter-clockwise until it clicks to put the device into a low-power standby state. For complete power disconnection, always remove the DC power plug from the board.

4.2 Bluetooth Pairing

1. Ensure the amplifier is powered on. The Bluetooth indicator light (if present) will typically flash, indicating it is in pairing mode.
2. On your audio source device (smartphone, tablet, computer), enable Bluetooth and search for available devices.
3. Select "ZK-1002L" (or a similar name) from the list of discovered devices to initiate pairing.
4. Once successfully paired, the Bluetooth indicator light will usually become solid, and you can begin playing audio through the amplifier.

4.3 Volume Control

Adjust the audio output volume using the potentiometer knob on the amplifier board. You can also control the volume from your connected Bluetooth device.

5. Specifications

6. Troubleshooting

• No Sound:
  • Ensure the power supply is correctly connected and the amplifier is powered on.
  • Verify all speaker connections are secure and correctly polarized.
  • Confirm that your Bluetooth device is successfully paired and connected to the amplifier.
  • Check the volume levels on both the amplifier and your source device.
• Distorted Sound:
  • Reduce the volume on both the amplifier and the source device.
  • Ensure your speakers' impedance and power ratings are compatible with the amplifier's specifications.
  • Verify that the power supply voltage is adequate for the desired output power. Insufficient voltage can lead to distortion at higher volumes.
• Bluetooth Disconnection:
  • Ensure your source device is within the 15-meter transmission range and there are no significant obstructions.
  • Try unpairing and re-pairing the device with the amplifier.
• Overheating:
  • Ensure the amplifier has adequate ventilation, especially around the heatsink.
  • Verify that the connected speaker impedance is not too low, as this can cause excessive heat.
  • Reduce the output power if operating at maximum levels for extended periods.

7. Maintenance

• Keep the amplifier board clean and free from dust. Use a soft, dry cloth for cleaning.
• Avoid exposing the device to moisture, liquids, or extreme temperatures.
• Do not attempt to modify or disassemble the circuit board beyond the initial assembly. Unauthorized modifications can void any potential warranty and may cause damage.
• When not in use for extended periods, disconnect the DC power supply.

8. Safety Information

• Always ensure the power supply voltage is within the specified range (5V-24V DC).
• Do not short-circuit the speaker terminals or power input.
• Keep the device away from children.
• Ensure proper ventilation to prevent overheating.
• If any smoke, unusual odors, or abnormal heat are detected, immediately disconnect the power supply.

9. Warranty and Support

Information regarding specific warranty terms and spare parts availability for the DollaTek ZK-1002L is not provided in the product details. For technical support or warranty inquiries, please contact your retailer or the manufacturer, DollaTek, directly.