Introduction
This user manual provides essential information for the safe and effective use of your K-MAINS AC Adapter Charger. Please read this manual thoroughly before using the product and retain it for future reference.

Figure 1: K-MAINS AC Adapter Charger. This image shows the compact black adapter with its attached power cord, coiled neatly.
Safety Information
To ensure safe operation and prevent damage, observe the following safety guidelines:
- Certifications: Our products are CE / FCC / RoHS certified, ensuring compliance with international safety and environmental standards.
- Protection Features: This adapter is equipped with multiple protection mechanisms:
- OVP (Over Voltage Output Protection): Prevents damage from excessive output voltage.
- OCP (Over Current Output Protection): Safeguards against damage from excessive output current.
- SCP (Short Circuit Output Protection): Protects the device and adapter from short circuits.
- Compatibility: Always verify the model of your device before connecting the charger to ensure compatibility.
- Environment: Use the adapter in a dry environment. Avoid exposure to water, moisture, or extreme temperatures.
- Handling: Do not disassemble, modify, or drop the adapter. Avoid pulling the cord excessively.
Setup and Connection
Follow these steps to set up and connect your AC adapter:
- Verify Compatibility: Before connecting, confirm that your device (e.g., PAPIFEED PB-32, PB-31, PB-33) requires the specifications provided by this K-MAINS AC Adapter.
- Connect to Device: Insert the round connector plug of the adapter firmly into the power input port of your compatible device.
- Connect to Power Outlet: Plug the AC adapter's prongs into a standard wall power outlet (100V AC).
- Power On: Once connected, your device should begin to receive power or charge, depending on its design.

Figure 2: K-MAINS AC Adapter Charger showing the round connector. This image displays the adapter from a different angle, highlighting the output cable and its round connector plug.
Operating Instructions
The K-MAINS AC Adapter Charger is designed for straightforward operation:
- Continuous Power: The adapter provides continuous power to your device when plugged into a live electrical outlet.
- Charging Indicator: If your device has a charging indicator light, observe it to confirm that charging is in progress.
- Unplugging: To disconnect, first unplug the adapter from the wall outlet, then disconnect the connector from your device.
Maintenance and Care
Proper care will extend the life of your AC adapter:
- Cleaning: Disconnect the adapter from all power sources and devices before cleaning. Use a soft, dry cloth to wipe the surface. Do not use liquid cleaners or aerosols.
- Storage: Store the adapter in a cool, dry place away from direct sunlight and extreme temperatures. When storing, avoid tightly coiling the cable to prevent damage.
- Inspection: Periodically inspect the cable and connector for any signs of wear, fraying, or damage. If damage is observed, discontinue use immediately.
Troubleshooting
If you encounter issues with your AC adapter, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not powering on/charging. |
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| Adapter feels warm during use. |
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If the problem persists after trying these solutions, please refer to the Support and Warranty section.
Specifications
| Feature | Detail |
|---|---|
| Brand | K-MAINS |
| Compatible Devices | PAPIFEED PB-32, PB-31, PB-33, PB32, PB31, PB33 (Monitors, Speakers, Tablets) |
| Connector Type | Round |
| Color | Black |
| Input Voltage | 100 Volts (AC) |
| Power Source | Corded Electric |
| Special Feature | Travel |
| Manufacturer | DONGGUAN RONG HANG ELECTRONIC TECHNOLOGY CO LTD |
| Date First Available | December 25, 2024 |
Support and Warranty
K-MAINS is committed to providing reliable products. While specific warranty details are not provided in this manual, we encourage you to retain your proof of purchase.
If you experience any issues with missing parts or damage upon arrival, or if the product does not perform as expected, please contact the seller or retailer from whom you purchased the product. They will assist you in finding a satisfactory solution.
For general inquiries or technical support, please refer to the contact information provided by your point of purchase or visit the K-MAINS official website if available.





