application software.
The printer serial port setting is not correspondent to the PC’s setting
Please do the configuration by the following commands.
C:\>COPY CON LPT1 <Enter>
SET COM1 96,N,8,1 <Enter>
<Ctrl>Z<Enter>
C:\>
9. Poor print quality
The dust or glue from label may stick onto the print head. Wipe the thermal
print head by the soft cloth soaked with Ethanol.
Adjust the print density setting.
Ribbon and paper media are not compatible.
If this problem happens after changing a new print head module, adjust the
print head’s heater line position by re-assembling print head module.
10. Stepping motor does not feed label
Is stepping motor function abnormal?.
Check if U18, and U19 (3717 driver IC) of main board are broken?
11. LED keeps at solid amber.
Is switching power broken?
Is main board broken? Please replace a new main board.
Try to update the firmware on line. Press the FEED and power on the printer
at same time. Press the FEED again while the first green LED is on. Finally,
transmit the firmware program to the printer from PC.
12. Cutter functions abnormally.
Cutter is not activated (other error)
At first, check if cutter is broken or the main PCB is damaged. If it still has problem
after changing a new cutter, perhaps the U30 (driver IC), U28 IC or U34 on the
main board was broken. Otherwise, check if the pin 28 of U2 (CPU) is good.
13. Black mark can’t be detected properly (out of paper or paper jam)
Please check if the position of the black mark on label is correspondent with
black mark sensor.
Is the width of black mark on label too thin to be detected? The
recommended black mark width is wider than 12 mm.
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