NETUM C750
NETUM C750 QR Code Scanner and 80mm Thermal Receipt Printer User Manual
Model: C750
1. Introduction
This user manual provides comprehensive instructions for the setup, operation, and maintenance of your NETUM C750 QR Code Scanner and 80mm Thermal Receipt Printer. This bundle offers a versatile solution for point-of-sale (POS) and inventory management needs, combining efficient barcode scanning with high-speed thermal printing capabilities.

Image: The NETUM C750 bundle, featuring the black thermal receipt printer on the left and the black and yellow QR code scanner on the right, with USB cables and a wireless dongle.
2. Safety Information
Please read all safety instructions carefully before using the device. Failure to follow these instructions may result in electric shock, fire, or damage to the product.
- Do not expose the devices to water or excessive humidity.
- Avoid dropping or subjecting the devices to strong impacts.
- Use only the power adapter supplied with the printer.
- Do not attempt to disassemble or repair the devices yourself. Contact qualified service personnel.
- Keep the devices away from heat sources and direct sunlight.
- Ensure proper ventilation for the printer during operation.
3. Package Contents
Verify that all items listed below are included in your package:
- NETUM 80mm Thermal Receipt Printer
- NETUM C750 QR Code Scanner
- Printer Power Adapter
- Printer USB Cable
- Scanner USB Charging Cable
- 2.4G Wireless Dongle (for scanner)
- User Manual (this document)
- Thermal Paper Roll (pre-installed or separate)

Image: Contents of the printer package, including the thermal printer, power adapter, USB cable, antenna, and a small instruction leaflet.
4. Setup Guide
4.1. Thermal Receipt Printer Setup
- Connect Power: Connect the power adapter to the printer's power port and plug it into a wall outlet.
- Connect Data Cable:
- USB Connection: Connect the printer to your computer using the supplied USB cable.
- Ethernet (LAN) Connection: Connect an Ethernet cable from the printer's LAN port to your network router or switch.
- WiFi Connection: Ensure the printer's WiFi antenna is securely attached. Refer to the separate WiFi setup guide for detailed instructions on connecting to your wireless network.
- Load Thermal Paper:
- Open the printer cover by pressing the release button.
- Insert the thermal paper roll with the printing side facing up.
- Pull a small amount of paper out past the cutter and close the cover firmly until it clicks.
- Install Drivers: For USB or Ethernet connections, install the appropriate printer drivers on your computer. Drivers are typically provided on a CD or can be downloaded from the NETUM official website.

Image: Rear view of the NETUM thermal printer, highlighting the various connectivity ports including USB, WiFi antenna port, Status Switch, Cash Drawer port, and Power switch.
4.2. QR Code Scanner Setup (C750)
- Charge the Scanner: Connect the scanner to a USB power source using the provided USB charging cable. The indicator light will show charging status.
- Connect to Device:
- 2.4G Wireless Connection: Plug the 2.4G wireless dongle into a USB port on your computer or host device. The scanner will automatically pair.
- Bluetooth Connection: Turn on the scanner. On your tablet, smartphone, or computer, enable Bluetooth and search for "NETUM C750" (or similar). Select it to pair.
- USB Wired Connection: Connect the scanner directly to your computer via the USB cable. It will function as a plug-and-play device.
- Configuration (Optional): Scan specific configuration barcodes from the scanner's manual (not included here) to change settings such as scanning mode (continuous, manual), data transmission mode, or add prefix/suffix.

Image: The NETUM C750 QR Code Scanner, a sleek black and yellow device, shown alongside its USB-C and USB-A charging/data cables and a compact 2.4G wireless USB dongle.
5. Operating Instructions
5.1. Thermal Receipt Printer Operation
- Power On/Off: Use the power switch located at the back of the printer to turn it on or off.
- Printing: Once connected and drivers are installed, send print commands from your POS software or application. The printer supports ESC/POS commands for various printing functions.
- Auto-Cutter: The printer features an auto-cutter for clean and efficient receipt cutting after each print job.
- Feed Button: Press the "FEED" button on the front panel to advance the paper manually.
- Indicator Lights: Observe the indicator lights (e.g., Power, Paper, Error) on the front panel for printer status.

Image: The NETUM 80mm Thermal Receipt Printer actively printing a receipt, with the paper emerging from the top slot.
5.2. QR Code Scanner Operation
- Power On/Off: Press and hold the trigger button for a few seconds to turn the scanner on or off.
- Scanning: Point the scanner's window at the barcode or QR code and press the trigger button. A successful scan will typically be indicated by a beep and/or a green light.
- Data Transmission: Scanned data will be transmitted to your connected device (computer, tablet, smartphone) as if typed from a keyboard.
- Supported Codes: The C750 scanner supports 1D and 2D barcodes, including QR codes.
6. Maintenance
- Cleaning:
- Wipe the exterior of both devices with a soft, dry cloth.
- For the printer's thermal print head, use a cotton swab lightly dampened with isopropyl alcohol. Ensure the printer is off and cool before cleaning.
- For the scanner's optical window, use a soft, lint-free cloth.
- Paper Replacement (Printer): Replace the thermal paper roll when the "PAPER" indicator light illuminates or when printing becomes faint. Follow the paper loading instructions in Section 4.1.
- Battery Care (Scanner): To prolong battery life, avoid fully discharging the scanner frequently. Charge it regularly.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Printer not printing. | No power; Paper out; Driver issue; Connection issue. | Check power connection; Load paper; Reinstall drivers; Verify USB/Ethernet/WiFi connection. |
| Faint or blank print. | Paper loaded incorrectly; Low quality paper; Dirty print head. | Ensure thermal side is up; Use high-quality thermal paper; Clean print head (see Section 6). |
| Scanner not connecting. | Low battery; Out of range; Incorrect pairing mode. | Charge scanner; Move closer to host device; Re-pair via 2.4G dongle or Bluetooth. |
| Scanner not reading barcodes. | Barcode damaged; Scanner window dirty; Incorrect symbology setting. | Try a different barcode; Clean scanner window; Reset scanner to factory defaults (if applicable, via configuration barcode). |
8. Specifications
8.1. NETUM 80mm Thermal Receipt Printer
- Printing Method: Direct Thermal
- Print Speed: Up to 300mm/sec
- Paper Width: 80mm
- Auto Cutter: Yes (up to 1.5 million cuts)
- Interface: USB, Serial, Ethernet (LAN), WiFi
- Command Set: ESC/POS compatible
- Cash Drawer Port: Yes
- Power Source: Corded Electric
8.2. NETUM C750 QR Code Scanner
- Model Number: C750
- Scan Type: 1D & 2D (QR Code, Data Matrix, etc.)
- Connectivity: Bluetooth, 2.4G Wireless, USB Wired
- Compatible Devices: Tablet, Smartphone, PC (Windows, Android, iOS)
- Power Source: Internal Rechargeable Battery (charged via USB)
9. Warranty and Support
NETUM products are designed for reliability and performance. For warranty information, please refer to the warranty card included with your product or visit the official NETUM website. If you encounter any issues or require technical assistance, please contact NETUM customer support through their official channels (website, email, or phone number) as provided in your product documentation or on their website.
Please have your product model number (C750) and purchase details ready when contacting support.
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