1. Introduction
This manual provides essential instructions for the safe and effective use of your UPBRIGHT 15V AC/DC Adapter, model SK03G-1500250U. This power supply is designed to provide reliable power to compatible Polk Audio soundbar models, including FR1, DSB1, ZM1520, ZM1520-A, ZM1520A, AM1520, and AM152017544 series. Please read this manual thoroughly before use and retain it for future reference.

Image 1.1: The UPBRIGHT 15V AC/DC Adapter and its accompanying power cord.
2. Safety Information
To ensure safe operation and prevent damage, observe the following precautions:
- Input Voltage: This adapter supports a worldwide input voltage range of 100-240VAC, 50/60Hz. Ensure your power outlet matches these specifications.
- Protection Features: The adapter is equipped with Over Voltage Protection (OVP), Over Current Protection (OCP), and Short Circuit Protection (SCP) to safeguard your devices.
- Indoor Use Only: This adapter is designed for indoor use in dry conditions. Do not expose it to moisture, rain, or extreme temperatures.
- Compatibility: Verify that the voltage and current requirements of your device match the adapter's output (15V DC, 2.5A - 3A). Pay close attention to the connector type and polarity.
- Avoid Overloading: Do not connect the adapter to devices that exceed its maximum output current.
- Proper Handling: Do not modify, disassemble, or drop the adapter. Keep it away from children.
3. Product Overview
The UPBRIGHT 15V AC/DC Adapter is a switching power supply designed for various electronic devices, primarily Polk Audio soundbars. It features a barrel round connector for DC output.
Key Features:
- Universal Input: 100-240VAC, 50/60Hz.
- Output: 15V DC, 2.5A - 3A.
- Connector Type: Barrel Round Connector.
- Safety: OVP, OCP, SCP Protection.
- Compatibility: Specifically designed for Polk Audio FR1, DSB1, ZM1520, ZM1520-A, ZM1520A, AM1520, AM152017544 Soundbars.

Image 3.1: The DC barrel connector and the AC power plug.

Image 3.2: Correct DC barrel connector polarity (center positive).
4. Setup
- Verify Compatibility: Before connecting, ensure your device (e.g., Polk Audio soundbar) requires a 15V DC power input and has a compatible barrel connector with center-positive polarity. Note: This adapter may NOT fit subwoofers. Always check your unit's specific power requirements.
- Connect DC Output: Insert the barrel connector of the adapter firmly into the DC input port of your Polk Audio soundbar.
- Connect AC Input: Plug the AC power cord into the adapter's AC input port.
- Connect to Wall Outlet: Insert the AC power cord's plug into a standard wall outlet (100-240VAC).
- Power On: Once connected, your device should receive power. Refer to your device's manual for specific power-on procedures.

Image 4.1: Example of different AC power cords that may be supplied based on region.
5. Operating Instructions
The UPBRIGHT 15V AC/DC Adapter operates automatically once connected to a power source and a compatible device. It provides a stable 15V DC output. No user intervention is required for its basic operation.
- Ensure all connections are secure before powering on your device.
- If your device has an ON/OFF switch, use it to control power to the device.
- Disconnect the adapter from the wall outlet when not in use for extended periods.
6. Maintenance
The UPBRIGHT AC/DC Adapter requires minimal maintenance. Follow these guidelines to prolong its lifespan:
- Cleaning: Disconnect the adapter from power before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or solvents.
- Storage: Store the adapter in a cool, dry place away from direct sunlight and extreme temperatures.
- Cable Care: Avoid bending or crimping the power cord excessively. Do not place heavy objects on the cord.
- Inspection: Periodically inspect the adapter and cables for any signs of damage, such as frayed wires or cracked casing. If damage is found, discontinue use immediately.
7. Troubleshooting
If you encounter issues with your adapter, refer to the following troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to device |
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| Adapter does not fit device port |
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| Device not charging/powering efficiently |
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8. Specifications
| Feature | Detail |
|---|---|
| Brand | UPBRIGHT |
| Model Number (Adapter) | SK03G-1500250U |
| Input Voltage | 100-240VAC, 50/60Hz |
| Output Voltage | 15V DC |
| Output Current | 2.5A - 3A (2500mA) |
| Wattage | 15 Watts (max) |
| Connector Type | Barrel Round Connector |
| Special Features | OVP (Over Voltage Protection), OCP (Over Current Protection), SCP (Short Circuit Protection) |
| Compatible Devices | Polk Audio FR1, DSB1, ZM1520, ZM1520-A, ZM1520A, AM1520, AM152017544 Soundbars/Speakers |
| Product Dimensions | 6 x 3 x 2 inches (approximate adapter unit size) |
| Item Weight | 7.8 ounces |
9. Warranty and Support
UPBRIGHT products are designed for reliability and performance. This adapter comes with the following warranty and support:
- Refund Policy: 30 Days Refund.
- Exchange Policy: 24 Months Exchange.
For warranty claims or technical assistance, please contact your retailer or the UPBRIGHT customer support channel where the product was purchased. Please have your purchase details and product model number (SK03G-1500250U) available.