1. Introduction
This manual provides essential instructions for the safe and effective use of your YUSTDA AC/DC Adapter. This power supply is designed to be compatible with various Comcast Xfinity Set-Top Box models, including DCX 3200, 3501, 3510, 3600, RNG, and XG1 series. Please read this manual thoroughly before use and retain it for future reference.
2. Safety Information
To ensure safe operation and prevent damage, please observe the following precautions:
- Indoor Use Only: This adapter is designed for indoor use in dry locations. Do not expose it to water, rain, or excessive humidity.
- Grounded Outlet: Connect the adapter only to a properly grounded electrical outlet.
- Voltage Compatibility: The adapter supports a worldwide input voltage range of 100-240VAC, 50/60Hz. Ensure your power source is within this range.
- Cable Management: Avoid placing heavy objects on the power cord or subjecting it to sharp bends. Keep the cord away from heat sources.
- Ventilation: Ensure adequate ventilation around the adapter to prevent overheating. Do not cover the adapter.
- Disconnection: Always unplug the adapter from the power outlet before cleaning or if it will be unused for an extended period.
- Damage: Do not use the adapter if the cord or plug is damaged, or if the adapter itself shows signs of physical damage. Contact support for replacement.
- Protection Features: The adapter is equipped with built-in safety features including over-current protection, total power protection, over-voltage protection, and short-circuit protection to safeguard your devices.

Image 1: Multi-Protection Features. This diagram illustrates the four key safety protections integrated into the YUSTDA AC/DC adapter: over-voltage, over-current, over-temperature, and short-circuit protection, ensuring device safety.
3. Product Overview
The YUSTDA AC/DC Adapter is a reliable power supply unit designed for specific Comcast Xfinity Set-Top Box models. It features a durable design with a total cord length of approximately 10 feet (3 meters) for flexible placement.

Image 2: YUSTDA AC/DC Adapter. This image displays the complete power adapter unit, including the main power brick, the detachable AC input cord, and the DC output cable with its barrel connector.

Image 3: High-Quality Power Cable Design. This illustration highlights the internal structure of the power cable, emphasizing the use of high-quality copper wire and a PVC insulation jacket for durability and efficient power transmission.

Image 4: Durable & Compact Design. This image showcases the adapter's robust construction and its compact form factor, suitable for various environments.
4. Setup Instructions
Follow these steps to properly connect your YUSTDA AC/DC Adapter to your compatible Comcast Xfinity Set-Top Box:
- Verify Compatibility: Ensure your Set-Top Box model is listed as compatible (DCX 3200, 3501, 3510, 3600, RNG, XG1 Series).
- Connect DC Output: Plug the barrel connector of the adapter's DC output cable into the power input port of your Set-Top Box. Ensure a snug fit.
- Connect AC Input: Connect the detachable AC power cord to the adapter's AC input port.
- Plug into Outlet: Insert the AC power plug into a standard, grounded electrical wall outlet.
- Power On: Your Set-Top Box should now receive power. Observe any indicator lights on your Set-Top Box to confirm power reception.
The total length of the power cord, including both AC and DC segments, is approximately 10 feet, providing ample reach for most setups.
5. Operating Instructions
Once properly connected, the YUSTDA AC/DC Adapter operates automatically to provide continuous power to your Set-Top Box. There are no user-adjustable settings on the adapter itself.
- Ensure the adapter is always connected to a stable power source.
- If your Set-Top Box has a power button, use it to turn the device on or off as needed.
- An LED indicator on the adapter may illuminate when power is supplied, confirming operation.
6. Maintenance
Minimal maintenance is required for the YUSTDA AC/DC Adapter. Follow these guidelines to ensure longevity:
- Cleaning: Disconnect the adapter from the power outlet before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or abrasive materials.
- Storage: If storing the adapter for an extended period, unplug it and store it in a cool, dry place, away from direct sunlight and extreme temperatures.
- Inspection: Periodically inspect the power cord and adapter housing for any signs of damage, such as cuts, fraying, or cracks. If damage is found, discontinue use and replace the adapter.
7. Troubleshooting
If you encounter issues with your YUSTDA AC/DC Adapter, refer to the following common troubleshooting steps:
- No Power to Set-Top Box:
- Ensure the AC power cord is securely plugged into both the adapter and the wall outlet.
- Verify the DC barrel connector is firmly inserted into the Set-Top Box's power input.
- Test the wall outlet with another device to confirm it is functional.
- Check for any visible damage to the adapter or cables. If damaged, discontinue use.
- Adapter Feels Warm:
- It is normal for power adapters to feel slightly warm during operation.
- If the adapter is excessively hot to the touch, unplug it immediately. Ensure it is not covered and has adequate ventilation.
If these steps do not resolve the issue, please contact customer support.
8. Specifications
| Feature | Detail |
|---|---|
| Brand | YUSTDA |
| Model Number | A1807185253 |
| Input Voltage | 100-240VAC, 50/60Hz |
| Connector Type | Barrel Connector |
| Compatible Devices | Comcast Xfinity Set-Top Boxes (DCX 3200, 3501, 3510, 3600, RNG, XG1 Series) |
| Total Cord Length | Approx. 10 feet (3 meters) |
| Safety Features | Over-current protection, Total power protection, Over-voltage protection, Short-circuit protection |
| Certifications | FCC, CE, RoHS |
| Item Weight | 8 ounces |
| Package Dimensions | 6.73 x 4.21 x 1.54 inches |
9. Warranty and Support
For any questions, concerns, or technical support regarding your YUSTDA AC/DC Adapter, please contact our customer service team.
Email: epcustomerservice@yahoo.com
Please provide your product model number (A1807185253) and a detailed description of your issue when contacting support to facilitate a quicker resolution.