1. Introduction
This manual provides essential information for the safe and effective operation of your SHNITPWR 72W Universal Power Supply. Please read it thoroughly before use and retain it for future reference.
Package Contents:
- 1x 3~24V DC 72W Universal Power Supply Adapter
- 14x DC Tips (various sizes including 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 3.0x1.1mm, 5.5x1.7mm, Micro-USB, Type-C)
- 1x 65W PD Power Converter (USB C Charger Tip)
- 1x DC Female Jack to Alligator Clips Power Cable
- 1x Reverse Polarity Converter Cable
Figure 1: SHNITPWR 72W Universal Power Supply and its complete accessory set.
2. Safety Information
WARNING: Improper use can damage your device or the power supply. Always verify voltage and polarity requirements before connecting.
- Voltage Matching: Always ensure the output voltage selected on the power supply matches the voltage requirement of your electronic device. Refer to your device's specifications.
- Current Capacity: The power supply provides a maximum of 3A. Ensure your device's current draw does not exceed this limit.
- Polarity: Verify the correct polarity (+/-) for your device. Use the included polarity reversal cable if necessary. Incorrect polarity can cause severe damage.
- USB-C PD Tip: When using the 65W PD Type-C fast charging tip, adjust the power supply's voltage to be less than 20.5V. Exceeding this voltage may damage your USB-C device.
- Protection Systems: The unit features built-in safety protections including automatic over-voltage cut-off, over-current cut-off, over-temperature cut-off, and short-circuit cut-off.
- Do not expose the unit to water or excessive moisture.
- Do not disassemble or attempt to repair the unit. Refer to qualified personnel for service.
Figure 2: Integrated 6-Point Safety System for enhanced protection.
3. Setup
Follow these steps to set up your SHNITPWR Universal Power Supply:
- Identify Device Requirements: Determine the exact voltage (V) and current (A) requirements of your electronic device. This information is usually found on the device itself, its original power adapter, or in its user manual.
- Select Correct DC Tip: Choose one of the 14 included DC tips that physically fits your device's power input port.
- Connect DC Tip: Attach the selected DC tip to the output cable of the SHNITPWR power supply. Ensure a secure connection.
- Adjust Voltage: Before plugging the power supply into a wall outlet or connecting it to your device, use the rotary knob on the power supply to set the desired output voltage. The LCD display will show the current voltage setting. Adjust carefully to match your device's requirement.
- Verify Polarity (if necessary): If your device requires a specific polarity that differs from the standard center-positive output of the power supply, use the included polarity reversal cable. Connect it between the power supply's output and the selected DC tip.
- Connect to Device: Once the voltage is set and polarity is confirmed, connect the DC tip to your electronic device.
- Plug into Power Outlet: Finally, plug the SHNITPWR power supply into a standard AC 100-240V, 50/60Hz wall outlet.
Figure 3: Adjustable voltage range of the power supply.
Figure 4: Physical dimensions of the power supply unit and cables.
4. Operating Instructions
Adjusting Output Voltage:
The SHNITPWR power supply allows for precise voltage adjustment from 3V to 24V. Use the rotary knob on the front panel to increase or decrease the voltage. The current output voltage is displayed on the integrated LCD screen. Always adjust the voltage to match your device's requirements before connecting to prevent damage.
Using the PD 65W USB-C Fast Charging Tip:
This upgraded version includes a dedicated tip to convert the power supply into a PD 65W Type-C fast charger. To use this feature, ensure the power supply's output voltage is set to less than 20.5V. Connect the PD converter tip to the power supply, then connect your USB-C device (e.g., laptop, smartphone) to the converter.
Figure 5: Using the PD 65W USB-C Fast Charging Tip.
Alligator Clips and Polarity Reversal:
The included alligator clips power cable is ideal for DIY projects or connecting to devices with bare wire terminals. The polarity reversal cable allows you to change the output polarity (center positive to center negative, or vice-versa) to match specific device requirements, preventing potential damage from incorrect connections.
Figure 6: Details of the Type-C PD converter and Alligator Clips cable.
Figure 7: The 14 included DC tips and the polarity converter.
Wide Compatibility:
The diverse range of DC tips and adjustable voltage makes this power supply compatible with numerous electronic devices, including LED strips, under-cabinet lights, smart speakers, wireless routers, Wi-Fi cameras, USB hubs, and more.
Figure 8: Examples of compatible devices.
5. Maintenance
- Keep the power supply clean and free from dust. Use a soft, dry cloth for cleaning.
- Store the unit in a cool, dry place when not in use.
- Avoid dropping or subjecting the unit to strong impacts.
- Regularly inspect cables and connectors for any signs of wear or damage. Replace if necessary.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not powering on. | Incorrect voltage setting. | Adjust the voltage to match your device's requirements. |
| Device not powering on. | Incorrect DC tip or loose connection. | Ensure the correct tip is used and securely connected. |
| Device not powering on. | Incorrect polarity. | Use the polarity reversal cable if needed. |
| Device not powering on. | Device requires more current than 3A. | This power supply is not suitable for devices requiring more than 3A. |
| LCD display is off. | Power supply not connected to AC outlet. | Plug the power supply into a live AC outlet. |
| Power supply feels warm. | Normal operation, especially under load. | Ensure adequate ventilation. If excessively hot, disconnect and check device's power requirements. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | SNT-0324-72 |
| Input Voltage | AC 100~240V, 50/60Hz |
| Output Voltage | DC 3~24V Adjustable |
| Max Output Current | 3A |
| Max Output Power | 72W |
| USB-C PD Output | PD 65W (5V/9V=1.5A, 20V=3.25A, PPS: 3-11V=3.25A) |
| Display | LCD Digital Display |
| Included DC Tips | 14 pcs (e.g., 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 3.0x1.1mm, 5.5x1.7mm, Micro-USB, Type-C) |
| Additional Accessories | Alligator Clips Power Cable, Reverse Polarity Converter Cable |
| Safety Protections | Over-voltage, Over-current, Over-temperature, Short-circuit |
| Material | Plastic, Metal |
| Item Weight | 10.6 ounces (300 Grams) |
| Package Dimensions | 8.19 x 2.72 x 2.64 inches |
8. Warranty and Support
For warranty information or technical support, please contact SHNITPWR customer service through the retailer's platform or visit the official SHNITPWR website. Please have your product model number (SNT-0324-72) and purchase details ready when contacting support.
