Service manual

Confidential BTP-M280 Service Manual
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7 Troubleshooting
If the printer works abnormally, consult this chapter below. If there are still problems that can not be solved,
please contact your local dealer for assistance.
7.1 Print effect abnormal
1) Problems: Characters are not clear.
Possible causes and solutions:
¾ Ribbon ink is out, please change ribbon.
¾ There might be a lot of dust on the print head, please clear it up.
¾ Needles of the printer may be damaged. Please ask technical personnel to change
printing distance or change print head.
2) Problems: Some characters dots are omitted.
Possible causes and solutions:
¾ Print head cable damaged, please ask technical personnel to change it.
¾ Needles of the printer may be damaged, please ask technical personnel to change it.
3) Problems: Print color is mixed
Possible causes and solutions:
¾ The ribbon is loose, please turn the ribbon knob clockwise for 2-3 times to tighten the
ribbon.
¾ The nature life of ribbon is off, please change a new ribbon.
¾ The ribbon is not installed in the right position, please install the ribbon again.
¾ The dentiform belt is loose, please ask technical personnel to tighten it.
¾ The print space is too small, please ask technical personnel to adjust the space.
¾ The ribbon support plate is distorted, please ask technical personnel to modify or change
it.
¾ The paper force spring plate is distorted, please ask technical personnel to change it.
7.2 Paper detection abnormal
1) Problems: Printer alarm paper out mistakenly.
Possible causes and solutions:
¾ The paper end sensor is damaged, please check whether the sensor is normal or not, if
abnormal, please replace the sensor;
¾ The main control board is damaged, please replace the main control board.
7.3 Printing with noise
1) Problems: Noise is abnormal when feeding.
Possible causes and solutions:
¾ The paper feed motor is distorted，please replace it;
¾ The paper feeding gear is damaged, please replace it.
2) Problems: The noise of carriage is abnormal.