1. Introduction
This manual provides essential information for the safe and effective use of your UPBRIGHT 8V AC/DC Adapter. This adapter is designed to provide power to compatible ET Enter Tech Magic Sing Karaoke systems, specifically models ET23KH and ET-23000H. Please read these instructions thoroughly before use and retain them for future reference.
2. Product Overview
The UPBRIGHT 8V AC/DC Adapter is a switching power supply designed for reliable performance. It converts standard AC wall power to the required 8V DC for your compatible Magic Sing Karaoke device. Key features include:
- Global Input Voltage: Supports 100-240VAC, 50/60Hz, allowing for worldwide use with appropriate plug adapters.
- Safety Protections: Equipped with Over Voltage Protection (OVP), Over Current Protection (OCP), and Short Circuit Protection (SCP) to safeguard your devices.
- Compatibility: Specifically designed for ET Enter Tech Magic Sing Karaoke ET23KH, ET-23KH, and ET-23000H models.

Figure 2.1: The UPBRIGHT 8V AC/DC Adapter with its attached power cord and barrel connector.

Figure 2.2: Close-up view of the adapter's label, showing input (100-240V) and output (8V) specifications, along with safety certifications.
3. Safety Information
To prevent injury or damage to your device, always observe the following safety precautions:
- Use only with compatible devices as specified in this manual.
- 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. There are no user-serviceable parts inside.
- Ensure the power outlet is easily accessible and unplug the adapter during electrical storms or when unused for long periods.
- Keep out of reach of children.
4. Setup
Follow these steps to set up your UPBRIGHT 8V AC/DC Adapter:
- Verify Compatibility: Ensure your Magic Sing Karaoke device requires an 8V DC input and has a compatible barrel connector.
- Connect to Device: Insert the barrel connector of the adapter cable firmly into the DC input port of your Magic Sing Karaoke device.
- Connect to Power Outlet: Plug the adapter into a standard 100-240VAC wall outlet. If traveling internationally, use the appropriate regional plug adapter (see Figure 4.1).
- Power On: Once connected, your device should receive power. Refer to your Magic Sing Karaoke device's manual for specific power-on procedures.

Figure 4.1: Example of various international outlet adapters (AU, EU, UK) that may be used with the UPBRIGHT adapter for global compatibility.
5. Operation
The UPBRIGHT 8V AC/DC Adapter operates automatically once connected to a power source and a compatible device. It provides a stable 8V DC output. There are no user-adjustable settings on the adapter itself.
- Ensure the adapter is securely plugged into both the wall outlet and your device.
- If your device has a power indicator, confirm it illuminates to show power reception.
- Always disconnect the adapter from the power source before disconnecting it from your device, especially if the device is powered on.
6. Maintenance
The UPBRIGHT 8V AC/DC Adapter requires minimal maintenance:
- Cleaning: Disconnect the adapter from all power sources before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or solvents.
- 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.
- Inspection: Periodically inspect the adapter and cable for any signs of damage, such as frayed wires, cracks, or bent pins. If damage is observed, discontinue use immediately.
7. Troubleshooting
If you encounter issues with your adapter, refer to the following common solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Adapter not properly connected. Power outlet is not active. Incompatible device. Adapter or device malfunction. | Ensure both ends of the adapter are securely plugged in. Test the outlet with another device. Verify your device model is listed as compatible. Contact support if issues persist after checking connections and compatibility. |
| Adapter feels unusually hot. | Overload or internal fault. | Immediately unplug the adapter from the wall and device. Allow it to cool. Do not use if it continues to overheat. |
| Visible damage to adapter or cable. | Physical damage. | Discontinue use immediately to prevent electrical hazards. Replace the adapter. |
8. Specifications
| Brand | UPBRIGHT |
| Model Compatibility | ET Enter Tech Magic Sing Karaoke ET23KH, ET-23KH, ET-23000H |
| Input Voltage | 100-240VAC, 50/60Hz |
| Output Voltage | 8V DC |
| Connector Type | Barrel Connector |
| Color | Black |
| Product Dimensions | Approximately 3 x 3 x 1 inches (adapter block) |
| Safety Features | OVP (Over Voltage Protection), OCP (Over Current Protection), SCP (Short Circuit Protection) |
9. Warranty and Support
UPBRIGHT products are designed for reliability and performance. This adapter comes with a warranty to ensure your satisfaction.
- Warranty: UPBRIGHT offers a 30-day refund policy and a 24-month exchange warranty for tested units in great working condition. Please refer to your purchase documentation for specific terms and conditions.
- Customer Support: For technical assistance, troubleshooting, or warranty claims, please contact UPBRIGHT customer service through the retailer where the product was purchased or visit the official UPBRIGHT store page.

Figure 9.1: An example of a UPBRIGHT warranty certificate, indicating limited warranty coverage.