USER GUIDE
THERMAL LABEL PRINTER
MODEL: 50243
www.qoltec.com
1
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses, and can radiate radio frequency
energy, and if not installed and used in accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and receiver.
– Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
– Consult the seller or an experienced radio/TV technician for help.
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s
authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired
operation.
Introduction
These operating instructions contain information about the printer, the installation process, and technical
troubleshooting. Please read the instruction manual carefully.
Safety Instruction
Please read the following precautions to avoid personal injury or equipment damage before installing and
using the printer.
Warning: The print head is heating component, during printing and immediately after printing; do
not touch the print head and peripheral components.
Warning: Do not touch the print head and the connection plug, to avoid electrostatic damage to the
print head.
SAFETY PRECAUTIONS
1. Do not plug several products in one multi-outlet
2. You can only use this package supplied adapter.
3. Do not pull the plug by pulling the cable way
4. Do not plug or unplug the power cord when your hands are wet.
5. Do not bend the cable, or place it under heavy objects.
6. Install the printer on a stable place.
7. Use only approved accessories, do not try to disassemble, repair, or modification the printer.
8. Do not let water or other objects get inside to the printer.
9. Leave enough space for operation and maintenance around the printer.
10. The printer should be far away from water, sunlight and heat.
11. Don not USE or preserve the printer in a high temperature, humidity or severe pollution place.
12. Avoid to place the printer in a vibration and impact environment.
13. Connect the power adapter to a proper grounding socket, and avoid to use same power socket with
large electrical machine or other can cause the power supply voltage fluctuation device.
14. Please disconnect the power of the printer power adapter, If you don’t use the printer for a long time.
15. In order to keep good quality of printing and long life of the product, suggest you to use good quality
paper.
16. Plug or disconnect each interface, must turn off the power, Otherwise it may cause the printer
control electrical damage.
CONTEST OF THE PACKAGE
Adapter
Paper out button
Note: Open the printer box and save it for future shipping. In case of damage or loss of the device, please
contact the seller.
STANDARD ACCESSORIES
Printer
Data wire
APPEARANCE
Front view
Power cable
CD
Upper cover
Quick installation guide
USB line
Warranty card
Rear View
Paper outlet
1
Uncap button pole
3
4
5
6
1 LAN Interface
2
2 Paper feed
3 Power button
4 Power interface
5 USB interface
6 Serial interface
Inner View
Paper roll holder
Paper guide
PRODUCT SPECIFICATION
SPECIFICATION
Printing method Thermal Transfer/Direct Thermal
Resolution 203dpi
Paper guide
Printer head
mechanism
Paper roll holder
Printing
Storage
Barcode type
Detecting Function Sensor Gap sensor, Paper End Sensor, uncover sensor, black mark sensor
Power supply External Power Specification：24V 2.5A Peak Value：8A
LED indicator Unit Key RGB LED
Paper
Max printing width 104mm
Printing speed 5inch/s 127mm/s (hoisting speed 150mm realizable 150mm)
Interface USB 2.0
RAM 8M
Flash 4M（expand memory 8M realizable）
Code 39, Code 93, ITF, EAN 128, Code 128, subsets A, B, C, Codabar, EAN-8, EAN-13, UPC-A,
1D
UPC-E, EAN and UPC 2(5), digits, add-on, MSI, MSIC, PLESSEY, CPOST, ITF 14, EAN 14
2D QR code
Type Tagboard, Continuation paper, Black mark paper
Label Width Min 26.7mm max 120mm
Label Height Min 20mm max 300mm
Operation Temperature 0°C~50°C
Storage Temperature -10°C~60°C
Dimensions 217mm*182mm*170mm
Net Weight 1.4kg
Accessories Adaptor, USB cable, Power cable, CD, user manual, Warranty Car, Certificate
TPH lifespan 50km
Software Operation System XP/Win7/Win8/Win10
INSTALLATION
Adapter
POWER CONNECTION
1. Make sure the printer power button is in the "off" position.
2. Connect the power supply plug to the printer's outlet, and then connect the power supply to the power outlet.
Caution:
• Make sure you have the original power supply to avoid damaging the printer.
• If you have not used the printer for a long time, please unplug it.
CONNECTION TO THE PRINTER AND PC
1. Make sure that the printer is off.
2. Connect the printer to the computer with a communication cable.
Closed
INSTALL PAPER ROLL
Inside
Open the printer cover, place the label roll so that it rolls out of the top of the roll.
Open
Connecto to the PC
Adjust the paper guides to the width of the paper by sliding them, and then lock them after adjusting the width.
Paper guide
Paper guide
Close the printer cover.
Outside
Slide the paper into the paper tray at the back of the printer
Open the printer head, make sure the paper is positioned properly inside the printer. Push the latch at the
paper guide to lock it.
Push up the latch
Adjust the paper guides to the width of the paper by sliding them, and then lock them after adjusting the width.
Close the printer cover.
Paper guide
Paper guide
The operator panel
The operational method of FEED
Printer status Operation of FEED Function
Standby Press Feed in a blank paper automatically
Standby Press (3 seconds) Enter into the learn mode of cover sheet
Power off Hold (release after power on) Print out self-test page
Open the cover Press 10 seconds Factory Reset
Continuous printing Press Print pause
Print pause Press Resume Printing
Led indication of printer status
Led status The representative of the printer status
Green light shine Normal standby
Green light slow flashing Printer working
Blue light shine RAM Test Errors
Pink light shine Printer head over heat
Red light shine The above cover is not covered
Red light flashing No paper detected
Yellow light shine always Low input voltage
Yellow light flashing Paper jam
White light shine always Print pause
Printing Test
Print Self-test Page
When initially install a printer or any problems happen to the printer, you can make a self-test page to check the
status of firmware version, printer parameter setting, printing quality and related setting information of external
equipment etc. Once you confirm printer does not have any problems after self-testing, please check other devices
or software. Self-testing function is working independently with other devices and software.
To print a test page, check:
1. The printer is connected to the network and that the paper roll is correctly installed.
2. The printer is off and the cover is closed properly.
Hold down the paper feed button, and then press the power button. When the printer turns on, release the power button.
Printer maintenance
Dust, pollen, viscous substances and other dirt inside the printer can significantly reduce print quality. Follow
the steps below to clean the printer head when it is dirty.
Note: Turn off the power before servicing. After printing, the printer head will be hot. After turning off the
printer, wait 5 minutes before cleaning the print head.
Do not touch the heated part of the printer head during maintenance to avoid damaging it. Do not scratch or
damage the print head.
Cleaning the printer head
1. Open the printer cover, use the cleaning pen (or cotton swab moistened with diluted alcohol (ethanol or
isopropanol) to clean the printer head with the direction from the center to two ends.
2. DO NOT use the printer immediately after cleaning the printer head. Need to wait for the cleaning alcohol
used to dry completely (about 1-2 minutes) and the printer head is completely dry before using the printer.
Clean the sensor, the rubber roller and paper path
1. Open the printer cover and remove the paper roll.
2. Use a dry cloth or cotton cloth to wipe dust and other foreign matter.
3. Use a clean cloth or cotton swab soaked in ethyl alcohol to remove sticky substances and other impurities.
4. Do not use the printer immediately after cleaning the part. Wait for the alcohol to dry completely (about 1-2
minutes) and make sure the printer head and the cleaned parts are completely dry. If so, you can reuse the printer.
It is recommended to maintain the printer parts when quality of printing is worse than normal.
Troubleshooting
The table below shows typical problems and ways to solve them. If there is no solution in the table, contact
your distributor for help.
Problem Possible Causes Recommended Solution
The printer is not properly connected to
Disable LEDs
The printer does
not print
the wall outlet.
The printer is off.
The communication cable is not properly
connected to the printer and the computer.
Communication interface error.
Printer status error.
Check that the printer is properly connected to mains power.
Turn on the printer.
Connect the communication cable again.
RS232 port: Check the communication settings on your computer and make sure
that the settings match the printer settings. The RS232 baud rate can be
confirmed by printing a test page;
LAN Port: Make sure the green / orange RJ-45 Ethernet light is on. The printer's IP
address can be checked by printing a test page. Check that the driver port settings
are the same as the printers.
Verify that the printer is in standby mode (the green light is solid). Refer to the
status LED status table.
Make an autocalibration.
Incorrect
positioning
Poor print quality
Printing part of
the label
(incomplete)
No autocalibration.
Bad sensor setting.
Selection mode error.
Wrong paper loading.
Incorrect color saturation and print speed
setting.
The print head / rubber roller is covered
with dust or an adhesive substance.
The printer head is damaged.
The paper is not placed in the middle.
The label size you set is not correct.
Open the printer cover to check the sensors.
Check the printer information to confirm that the paper type
matches the paper loaded in the printer. You can change the settings
using the setting mode.
Reload paper again.
Use the setup or software mode to adjust the speed and color density of
the print.
Refer to the maintenance section.
Check the settings of the head defect if it has been damaged - contact
your distributor.
Adjust paper position
Set the appropriate label size.
Producer: ntec
Ul. Chorzowska 44B
44-100 Gliwice
Poland
www.qoltec.com
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