Introduction
This manual provides essential instructions for the safe and effective use of your Onerbl 14V 2A AC-DC Power Adapter. This adapter is designed to provide stable power to compatible devices, including the TCL Alto S21BW, S21BW-SW, and S21BWSW 2.1CH Soundbars, as well as devices requiring JFEC AC Adapter Model JF028WR-1400200UV or PG140W2000U.
Setup
Follow these steps to correctly set up your power adapter:
- Unpack the Adapter: Carefully remove the AC-DC power adapter and its associated cables from the packaging.
- Connect the AC Power Cord: Insert the two-prong end of the AC power cord into the corresponding receptacle on the power adapter unit. Ensure it is firmly seated.
- Connect to Device: Plug the DC output connector (the smaller, round connector) from the adapter into the power input port of your compatible device (e.g., TCL Alto S21BW Soundbar).
- Connect to Power Outlet: Insert the AC plug of the power cord into a standard electrical wall outlet.
The device should now receive power. If your device has an indicator light, confirm it illuminates.

Image: The Onerbl 14V 2A AC-DC Power Adapter, showing its main unit and connected cables.

Image: The power adapter in use, connected to a power strip and a device, demonstrating a typical setup.
Operating Instructions
The Onerbl 14V 2A AC-DC Power Adapter is designed for continuous operation with compatible devices. It converts standard alternating current (AC) from your wall outlet into direct current (DC) suitable for your electronic equipment.
- Ensure the adapter is used in a well-ventilated area to prevent overheating.
- Only use the adapter with devices that match its voltage (14V) and amperage (2A) requirements to avoid damage.
- Disconnect the adapter from the power outlet when not in use for extended periods.
Maintenance
Proper care will extend the life of your power adapter:
- Keep Dry: This adapter is intended for indoor use only. Avoid exposure to moisture or liquids.
- Handle with Care: Do not crush, bend excessively, or drop the adapter or its cables.
- Avoid Heat: Keep the adapter away from direct sunlight, heaters, and other heat sources.
- Cleaning: Disconnect the adapter from power before cleaning. Use a soft, dry cloth to wipe the surface. Do not use liquid cleaners or aerosols.
Troubleshooting
If you encounter issues with your power adapter, try the following steps:
- No Power to Device:
- Verify that the AC power cord is securely plugged into both the adapter and the wall outlet.
- Ensure the DC output connector is fully inserted into your device's power input.
- Test the wall outlet with another known working appliance to confirm it has power.
- Check for any visible damage to the adapter or cables. If damage is present, discontinue use immediately and replace the adapter.
- Adapter is Hot: It is normal for the adapter to feel warm during operation. If it becomes excessively hot to the touch, disconnect it immediately and allow it to cool. Ensure it is in a well-ventilated area and not covered.
Specifications
| Feature | Specification |
|---|---|
| Brand | onerbl |
| Model Numbers | JF028WR-1400200UV, PG140W2000U |
| Input Voltage | 100-240VAC |
| Input Frequency | 50/60Hz |
| Input Current | 1.8A |
| Output Voltage | 14V DC |
| Output Current | 2A (2000mA) |
| Output Wattage | 28W |
| Compatible Devices | TCL Alto S21BW, S21BW-SW, S21BWSW 2.1CH Sound Bar Soundbar |
| Connector Type | Proprietary |
| Cable Length | 76 inches |
| Dimensions (approx.) | 2.6" L x 1.6" W x 1.2" H |
| Manufacturer | Shenzhen Waweis Technology Co., Ltd |
| ASIN | B0DKT4C2WT |

Image: Front and side views of the adapter, highlighting its compact design and regulatory information.

Image: Visual representation of the adapter's dimensions and cable length for reference.