1. Introduction
Thank you for choosing the KFD 12V AC DC Adapter Charger. This manual provides essential information for the safe and efficient use of your new power supply. Please read this manual thoroughly before using the product and retain it for future reference.

Figure 1.1: KFD 12V AC DC Adapter Charger with US power cord and DC output cable.
2. Product Features
- Wide Input Voltage: Supports World Wide Input Voltage 100-240VAC 50/60Hz, making it suitable for international use.
- Stable Output: Provides a stable 12V 3A (36W) output, ensuring consistent power delivery to your device.
- Advanced Protection: Equipped with OVP (Over Voltage Output Protection), OCP (Over Current Output Protection), and SCP (Short Circuit Output Protection) for enhanced safety and device longevity.
- High Quality Materials: Constructed with high transmission thinned copper wire for reliable and safe operation.
- Compact Design: Slim and lightweight design, ideal for travel and easy portability.
Figure 2.1: Illustration of high transmission thinned copper wire and safety certifications (UL, CE, RoHS).
3. Specifications
| Specification | Value |
|---|---|
| Input Voltage | 100-240VAC, 50/60Hz |
| Output Voltage | 12V |
| Output Current | 3A |
| Output Wattage | 36W |
| Connector Type | Barrel Connector |
| Special Features | Short Circuit Protection, Over Voltage Protection, Over Current Protection |
| Compatible Devices | PEAQ Monitor PMO S240-IFC 24 FHD Slim Monitor, Projectors, Monitors, Cameras (with compatible voltage/current requirements) |
| Dimensions (L x W x H) | 90mm x 38mm x 28mm (approx. 3.54in x 1.49in x 1.10in) |
| Weight | Approx. 150g (0.33 lbs) |
| Certifications Met | FCC, OSHA, RoHS |
Figure 3.1: Physical dimensions of the KFD AC Adapter.
4. Package Contents
The package includes the following items:
- 1 x KFD AC Charger (Adapter Unit)
- 1 x US Cable (Power Cord)
5. Setup Instructions
Follow these steps to set up your KFD AC DC Adapter Charger:
- Connect the Power Cord: Insert the US power cable into the AC input port of the KFD adapter unit. Ensure it is firmly seated.
- Connect to Device: Plug the DC barrel connector from the adapter's output cable into the corresponding power input port on your PEAQ Monitor (or other compatible device). Ensure the connector is fully inserted.
- Connect to Power Outlet: Plug the US power cable into a standard 100-240V AC wall outlet.
- Power On Device: Turn on your monitor or device. The adapter will automatically provide power.
Figure 5.1: Proper connection of the power cord to the adapter unit.
6. Operating Guidelines
The KFD AC DC Adapter Charger is designed for simple plug-and-play operation. Once connected, it will provide continuous power to your device.
Safety Precautions:
- Do not expose the adapter to water, moisture, or high humidity.
- Avoid dropping or subjecting the adapter to severe impacts.
- Do not disassemble or attempt to repair the adapter yourself. Refer to qualified service personnel.
- Ensure the adapter is used within its specified input and output voltage/current ranges.
- Keep the adapter away from heat sources and direct sunlight.
- Unplug the adapter from the wall outlet when not in use for extended periods.
7. Maintenance
Proper maintenance ensures the longevity and optimal performance of your adapter.
Cleaning:
- Always unplug the adapter from the power outlet and your device before cleaning.
- Use a soft, dry cloth to wipe the surface of the adapter.
- Do not use liquid cleaners, aerosols, or harsh chemicals.
Storage:
- Store the adapter in a cool, dry place when not in use.
- Avoid tightly coiling the cables to prevent damage.
- Keep out of reach of children and pets.
8. Troubleshooting
If you encounter issues with your KFD AC DC Adapter Charger, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to device | Loose connections | Ensure all cables (AC power cord to adapter, adapter to device, power cord to wall outlet) are securely plugged in. |
| Wall outlet not working | Test the wall outlet with another known working device. Check circuit breaker if necessary. | |
| Incompatible device | Verify that your device's voltage and current requirements match the adapter's output (12V 3A). | |
| Adapter feels hot | Normal operation under load | It is normal for adapters to feel warm during operation. Ensure adequate ventilation around the adapter. If it's excessively hot or emitting smoke/smell, unplug immediately. |
| Device flickering/unstable power | Faulty cable or adapter | Inspect cables for damage. If issues persist, the adapter or device may be faulty. |
If the problem persists after trying these solutions, please contact customer support.
9. Warranty and Support
KFD products are manufactured with quality and reliability in mind. For any questions, technical support, or warranty inquiries, please contact the seller or manufacturer directly through your purchase platform. Please have your product model number (LD40-12V/3A) and purchase details ready when contacting support.





