1. Introduction
This manual provides essential instructions for the safe and effective use of your TOPCHARGEUR 9V AC-DC Power Adapter, specifically designed for compatibility with the Bontempi BT-805 keyboard. Please read this manual thoroughly before using the product and retain it for future reference.
2. Safety Information
- Ensure the power adapter is used only with devices requiring a 9V DC input with center-positive polarity. Using it with incompatible devices may cause damage.
- Do not expose the adapter to water, moisture, or extreme temperatures.
- Avoid dropping or subjecting the adapter to strong impacts.
- Do not attempt to open or modify the adapter. This will void the warranty and may pose a safety risk.
- Always unplug the adapter from the wall outlet when not in use or during electrical storms.
- Keep out of reach of children.
3. Setup Instructions
3.1 Unpacking
Carefully remove the power adapter from its packaging. Inspect the adapter and cable for any signs of damage. If any damage is observed, do not use the product and contact customer support.
3.2 Connecting the Adapter
- Locate the power input jack on your Bontempi BT-805 keyboard.
- Insert the barrel connector of the TOPCHARGEUR power adapter firmly into the keyboard's power input jack. Ensure a secure connection.
- Plug the AC power cord of the adapter into a standard 100-240V AC wall outlet.

Image: The TOPCHARGEUR 9V Power Adapter. This image shows the compact design of the adapter with its integrated cable and the barrel connector. A small LED indicator is visible on the adapter body, signifying power status.
4. Operating Instructions
4.1 Powering On
Once the adapter is correctly connected to both the keyboard and a power outlet, the LED indicator on the adapter will illuminate, signifying that power is being supplied. You can then power on your Bontempi BT-805 keyboard using its dedicated power switch.
4.2 Powering Off
To power off, first turn off your Bontempi BT-805 keyboard. Then, unplug the adapter from the wall outlet. It is recommended to disconnect the adapter from the keyboard if it will not be used for an extended period.
5. Maintenance
5.1 Cleaning
To clean the adapter, ensure it is unplugged from the wall outlet and disconnected from the keyboard. Use a soft, dry cloth to wipe the surface. Do not use liquid cleaners or abrasive materials.
5.2 Storage
When not in use, store the adapter in a cool, dry place, away from direct sunlight and extreme temperatures. Avoid tightly coiling the cable to prevent damage.
6. Troubleshooting
- No Power / LED Indicator Off:
- Check if the adapter is securely plugged into a working wall outlet.
- Ensure the barrel connector is fully inserted into the keyboard's power jack.
- Test the wall outlet with another device to confirm it has power.
- Keyboard Not Functioning:
- Verify that the keyboard's power switch is in the 'ON' position.
- Confirm that the adapter's LED indicator is lit, indicating power supply.
- Ensure the keyboard itself is not faulty.
- Adapter Overheating:
- Unplug the adapter immediately.
- Ensure the adapter is not covered or in an enclosed space that prevents proper ventilation.
- Contact customer support if overheating persists.
7. Specifications
| Input Voltage | 100-240V AC, 50-60Hz |
| Output Voltage | 9V DC |
| Polarity | Center Positive (+) |
| Cable Length | 120 cm |
| Special Feature | LED Power Indicator |
| Compatible Device | Bontempi BT-805 Keyboard |
8. Warranty and Support
This TOPCHARGEUR product is manufactured with quality and reliability in mind. For warranty information, technical support, or any inquiries regarding your power adapter, please contact the seller directly through your purchase platform. Please retain your proof of purchase for warranty claims.
Note: This product is shipped from France with tracking.