series printer will ignore incorrect syntax commands. Please set the printer to
the dump mode and make sure the printed command is identical to the
commands sent from the 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
SET COM1 19,N,8,1
<Ctrl>Z<Enter>
C:\>
9. Poor print quality
The head maybe dirty. Clean the thermal print head.
Adjust the print density setting.
Ribbon and paper media are not compatible.
10. Stepping motor does not feed label
Does stepping motor function normally.
Are U11, and U12 (3717 driver IC) of main board broken?
11. No 5V DC on main board.
Is switching power broken?
Is main board U3 broken? Please replace a new main board.
12. Cutter functions abnormally.
Cutter is not activated
Cutter is broken or the main PCB is broken. If it still has problem after a new cutter
replaced, the U14 (driver IC) or U5 IC on the main board may be broken.
13. Black mark can’t be detected properly
Please check the position of the black mark, If it can be detected by the
sensor. Is the width of black mark too thin to be detected? The suggested
black mark width is 12 mm.
Does the sensor function properly?
Measure the current of pin3 of Q9. It is 5VDC when the black mark is detected;
otherwise it should be 0V DC. If the voltage is correct as above mentioned
and the black mark still can’t be detected, CPU may have some problem.
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