1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Posiflex XT3915 15-inch Point-of-Sale (POS) System. The XT3915 is designed for reliable performance in commercial environments, featuring a fan-free, spill-resistant resistive touchscreen, a Celeron J6412 processor, 4GB RAM, and a 128GB Solid State Drive (SSD) running Windows 10.
Please read this manual thoroughly before operating the device to ensure proper usage and to maximize the lifespan of your system. Keep this manual for future reference.
2. Safety Information
- Power Supply: Use only the power adapter supplied with the system. Using an incorrect adapter may damage the device and void the warranty.
- Ventilation: Ensure adequate ventilation around the system. Do not block ventilation openings.
- Environment: Operate the system in a clean, dry environment. Avoid exposure to extreme temperatures, humidity, dust, and direct sunlight.
- Liquid Exposure: While the touchscreen is spill-resistant, avoid direct liquid spills onto the system. In case of a spill, immediately disconnect power and clean with a soft, dry cloth.
- Servicing: Do not attempt to service the system yourself. Refer all servicing to qualified service personnel.
- Cleaning: Disconnect the power cord before cleaning. Use a soft, damp cloth for cleaning the exterior. Do not use liquid or aerosol cleaners.
3. Package Contents
Verify that all items are present in the package:
- Posiflex XT3915 POS System Unit
- Power Adapter
- Power Cord
- User Manual (this document)
- (Optional) Peripherals as ordered (e.g., MSR, customer display)
If any items are missing or damaged, contact your vendor immediately.
4. Product Overview
The Posiflex XT3915 is an all-in-one POS terminal featuring a 15-inch resistive touchscreen. Below is an illustration of the system's general appearance.

Figure 4.1: Front view of the Posiflex XT3915 15-inch POS System. The image displays the sleek, all-in-one design with the 15-inch touchscreen mounted on a stable base.
4.1. System Components
- 15-inch Resistive Touchscreen: Primary user interface for input and display.
- Integrated Base: Provides stability and houses internal components.
- Power Button: Located typically on the side or rear of the unit.
- I/O Ports: Various ports for connecting peripherals (USB, LAN, Serial, VGA/HDMI, Power Input). Refer to the rear panel for specific port locations.
5. Setup
5.1. Unpacking and Placement
- Carefully remove the POS system from its packaging.
- Place the system on a stable, flat surface, ensuring adequate space for ventilation.
- Keep the packaging materials for future transport or storage.
5.2. Connecting Peripherals
Connect necessary peripherals such as a barcode scanner, receipt printer, cash drawer, or external keyboard/mouse to the appropriate ports on the rear of the system. Ensure all connections are secure.
5.3. Power Connection
- Connect the power cord to the power adapter.
- Plug the power adapter's DC output connector into the power input port on the POS system.
- Plug the power cord into a grounded electrical outlet.
5.4. Initial Power On
Press the power button, usually located on the side or rear of the unit. The system will boot up, and the Windows 10 operating system will load. Follow any on-screen prompts for initial Windows setup if applicable.
6. Operating Instructions
6.1. Touchscreen Operation
The XT3915 features a resistive touchscreen. Use a finger or a stylus for input. Light pressure is sufficient for touch recognition.
- Tap: Equivalent to a mouse click.
- Tap and Hold: Equivalent to a right-click.
- Drag: Move an item across the screen.
6.2. Windows 10 Interface
The system runs on Windows 10. Familiarize yourself with the standard Windows interface for navigation, application management, and system settings. Specific POS software operation will depend on the installed application.
6.3. Shutting Down the System
To properly shut down the system, click the Start button in Windows, then select Power, and choose Shut down. Do not power off the system by simply unplugging it or holding the power button, as this can lead to data corruption.
7. Maintenance
7.1. Cleaning the System
- Screen: Use a soft, lint-free cloth lightly dampened with a non-abrasive screen cleaner or water. Do not spray cleaner directly onto the screen.
- Casing: Wipe the exterior casing with a soft, damp cloth. Avoid harsh chemicals or abrasive materials.
- Ventilation: Periodically check and clean any ventilation openings to prevent dust buildup, which can affect performance and lifespan.
7.2. Software Updates
Regularly update your Windows 10 operating system and any installed POS software to ensure optimal performance, security, and compatibility. Follow the instructions provided by Microsoft and your software vendor for updates.
7.3. Data Backup
It is highly recommended to regularly back up critical data to an external storage device or cloud service to prevent data loss in case of system failure.
8. Troubleshooting
This section addresses common issues you might encounter with your Posiflex XT3915 POS system.
- System does not power on:
- Check if the power cord is securely connected to the system and the electrical outlet.
- Verify that the power adapter is functioning correctly.
- Try a different power outlet.
- Touchscreen is unresponsive or inaccurate:
- Ensure the screen is clean and free of debris.
- Restart the system.
- If the issue persists, touchscreen calibration may be required (refer to Windows settings or contact support).
- Peripherals are not detected:
- Verify that the peripheral is correctly connected to the appropriate port.
- Check the peripheral's power supply.
- Install or update the necessary drivers for the peripheral.
- Restart the system.
- System is slow or freezes:
- Close unnecessary applications.
- Check for sufficient free space on the 128GB SSD.
- Run a virus scan.
- Ensure Windows and drivers are up to date.
- Restart the system.
If you encounter issues not covered here or if troubleshooting steps do not resolve the problem, please contact your vendor or Posiflex technical support.
9. Specifications
Below are the technical specifications for the Posiflex XT3915 POS System:
| Feature | Specification |
|---|---|
| Model Number | XT3915 |
| Screen Size | 15 Inches (39 cm) |
| Resolution | 1366x768 |
| Touchscreen Type | Resistive, Spill-Resistant |
| CPU Model | Intel Celeron J6412 |
| RAM Memory | 4 GB |
| Storage | 128 GB SSD (Solid State Drive) |
| Operating System | Windows 10 |
| Graphics | Integrated Celeron Graphics |
| USB Ports | 1 (Total USB ports, specific configuration may vary) |
| Design Type | All-in-One Personal Computer |
| Manufacturer | Posiflex |
10. Warranty and Support
For warranty information, please refer to the warranty card included with your product or contact your point of purchase. Posiflex products typically come with a manufacturer's warranty covering defects in materials and workmanship.
For technical assistance, troubleshooting beyond this manual, or service inquiries, please contact your authorized Posiflex dealer or the customer support provided by MOBI PRINT, the brand under which this product is sold.
When contacting support, please have your product model number (XT3915) and serial number ready.





