1. Introduction
This manual provides essential instructions for the safe and effective use of your onerbl 5V AC/DC Adapter. This power supply is specifically designed to be compatible with BigFun BF-4302CL and BF-5302CL Kids Key Lighting Keyboards, providing the necessary 5V DC, 1A power for operation and charging of their built-in Li-Ion batteries.
Please read this manual thoroughly before using the adapter and retain it for future reference.
2. Safety Precautions
- Ensure the adapter is used only with compatible devices (BigFun BF-4302CL, BF-5302CL keyboards).
- Do not expose the adapter to water, moisture, or extreme temperatures.
- Avoid dropping or subjecting the adapter to severe impact.
- Do not attempt to open or modify the adapter. This will void any potential warranty and may cause electric shock.
- Unplug the adapter from the wall outlet when not in use for extended periods.
- Keep out of reach of children.
3. Package Contents
- 1 x onerbl 5V AC/DC Adapter with integrated power cord.
Figure 1: The onerbl 5V AC/DC Adapter. This image shows a black wall adapter and a separate black USB-A to USB-C cable. Please note that the actual output connector for the BigFun keyboards is a barrel type, and the cable may be integrated or a specific barrel-to-barrel cable, not USB-C.
4. Setup and Operation
4.1 Connecting the Adapter
- Locate the power input port on your BigFun BF-4302CL or BF-5302CL keyboard. This is typically a circular barrel jack.
- Insert the adapter's output connector firmly into the keyboard's power input port.
- Plug the adapter's wall plug into a standard AC 100-240V 50/60Hz electrical outlet.
- Ensure all connections are secure.
4.2 Powering On and Charging
- Once connected, the adapter will supply power to your keyboard and begin charging its internal Li-Ion battery if applicable.
- Refer to your BigFun keyboard's manual for specific instructions on battery charging indicators and power-on procedures.
- The adapter is designed for continuous use during keyboard operation and for charging.
Figure 2: Illustration of an adapter with an extended cord. The onerbl adapter is designed with a durable cord for convenient placement and use.
5. Maintenance
- Keep the adapter clean by wiping it with a dry, soft cloth. Do not use liquid cleaners.
- Regularly inspect the adapter and its cord for any signs of damage, such as fraying or exposed wires. Discontinue use immediately if damage is found.
- Store the adapter in a cool, dry place when not in use.
Figure 3: The adapter features a durable design with quality components, including copper wiring and a PVC jacket for longevity.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Keyboard not powering on or charging. |
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| Adapter feels unusually hot. |
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Figure 4: The onerbl adapter incorporates a smart chip for multiple safety protections, including short-circuit, over-voltage, and over-current protection, to guard against electrical hazards.
7. Specifications
- Brand: onerbl
- Model: 5V AC/DC Adapter
- Input: AC 100-240V, 50/60Hz (Worldwide compatible)
- Output: DC 5V, 1A (1000mA)
- Power: 5 Watts
- Connector Type: Barrel type (compatible with BigFun BF-4302CL, BF-5302CL)
- Safety Features: Over Voltage Protection, Over Heat Protection, Short-Circuit Protection, Over-Current Protection.
- Special Feature: Travel-friendly design.
Figure 5: While designed for BigFun keyboards, this 5V 1A adapter can power various other compatible 5V devices, showcasing its versatility.
8. Warranty and Support
Specific warranty details for this onerbl product are not provided in the available information. Please refer to the retailer or your purchase documentation for any applicable warranty terms.
For technical support or inquiries, please contact the seller or manufacturer through the platform where the product was purchased.





