Introduction
This manual provides essential information for the safe and effective use of your Onerbl 12V AC-DC Adapter. This power supply is designed to operate your device or charge its battery from standard electrical power outlets, converting AC power into the DC power required by your device. It has been validated and tested to ensure compatibility with specific Arcade1Up game machines.
Important Safety Information
- Compatibility: Ensure the adapter's voltage and current specifications match your device's requirements. This adapter is specifically designed for 12V Arcade1Up models and is NOT for 5V versions.
- Indoor Use Only: This adapter is intended for indoor use in dry locations. Do not expose to water, rain, or excessive humidity.
- Ventilation: Ensure adequate ventilation around the adapter during use. Do not cover the adapter or place it in an enclosed space that could restrict airflow.
- Power Outlet: Plug the adapter into an easily accessible power outlet.
- Cable Care: Do not place heavy objects on the power cord. Avoid bending, twisting, or pulling the cord excessively.
- Disconnection: Disconnect the adapter from the power outlet when not in use for extended periods or during electrical storms.
- Damage: Do not use the adapter if the cord or plug is damaged. Contact support for a replacement.
- Children: Keep the adapter out of reach of children.
Package Contents
Your package should contain the following items:
- 1 x Onerbl 12V AC-DC Adapter

Figure 1: The Onerbl 12V AC-DC Adapter unit, showing the main power brick and attached DC output cable with a barrel connector.

Figure 2: The detachable AC power cord, featuring a standard 2-prong plug for wall outlets and a C7 connector for the adapter.
Setup
Follow these steps to set up your Onerbl 12V AC-DC Adapter:
- Verify Compatibility: Confirm that your Arcade1Up game machine requires a 12V power supply. This adapter is compatible with models such as Arcade1Up 7433, MKB-A-303711, MKB-A-303720, and MKB-A-200410, including Mortal Kombat II 2 30th Deluxe Legacy Edition at Home Game Machines. Do not use with 5V versions.
- Connect AC Cord: Plug the detachable AC power cord (Figure 2) into the adapter unit (Figure 1). Ensure it is firmly seated.
- Connect to Device: Insert the barrel connector of the adapter's DC output cable into the power input port of your Arcade1Up game machine.
- Connect to Power Outlet: Plug the AC power cord into a standard electrical wall outlet.
- Power On: Once connected, the adapter will supply power to your device. A blue indicator light on the adapter unit (Figure 3) will illuminate when power is active.

Figure 3: The Onerbl 12V AC-DC Adapter in use, showing it plugged into a wall outlet and connected to a device, with the blue indicator light visible.
Operating Instructions
The Onerbl 12V AC-DC Adapter operates automatically once connected. It provides a stable 12V DC power supply to your compatible Arcade1Up game machine. There are no user-adjustable settings on the adapter itself.
- Ensure all connections are secure before powering on your game machine.
- The blue LED indicator on the adapter signifies that it is receiving AC power and outputting DC power.
- To power off your device, either use the device's power switch or unplug the adapter from the wall outlet.
Maintenance
Proper maintenance ensures the longevity and safe operation of your adapter:
- Cleaning: Disconnect the adapter from the power outlet and your device before cleaning. Use a soft, dry cloth to wipe the surface. Do not use liquid cleaners or aerosols.
- Storage: When not in use, store the adapter in a cool, dry place, away from direct sunlight and extreme temperatures. Avoid tightly coiling the cables.
- Inspection: Periodically inspect the adapter, power cord, and connectors for any signs of damage, such as fraying, cuts, or bent pins. If damage is found, discontinue use and replace the adapter.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to device / Adapter LED is off. |
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| Device powers on but is unstable or flickers. |
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| Adapter feels excessively hot. |
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Specifications
| Brand | onerbl |
| Model Number | 1 |
| Input Voltage | 12 Volts |
| Connector Type | Barrel Connector |
| Main Power Connector Type | 2 Pin (for AC cord) |
| Power Source | Corded Electric |
| Compatible Devices | Arcade1Up 7433, MKB-A-303711, MKB-A-303720, MKB-A-200410 (Mortal Kombat II 2 30th Deluxe Legacy Edition AT Home Game Machine Arcade 1up) |
| Manufacturer | Shenzhen Waweis Technology Co., Ltd |
| Mounting Type | Wall Mount (refers to the plug design) |

Figure 4: Dimensional diagram of the Onerbl 12V AC-DC Adapter, illustrating cable lengths and adapter unit dimensions.
Warranty and Support
For warranty information or technical support, please refer to the documentation provided with your purchase or contact the seller directly. Keep your purchase receipt for warranty claims.