THS Error on warrantee printer tally serial printer

The print head operating temperature may need to be calibrated for the operating environment of the printer.
The print head cable may be damaged or incorrectly plugged into the print head or logic board.
The print head may have a fault.
There may be a fault on the logic board or interconnect board

The first thing that I would recommend doing would be to calibrate the print head operating temperature, this can be done in the following way;

·Start with the printer powered OFF and at normal room temperature
·Hold down the ONLINE and SETUP button and power the printer back on
·Keep the ONLINE and SETUP button held down until the display reads ‘PRINT TEMP. CAL’ along the top line
·Press the button under ‘TEMP CAL’ (button 3)
·Using buttons 2 or 3 change the Temp Setting to match the temperature of the room the printer is used in (change this value by at least 1 degree even if it is correct to force the printer into recalibrating.
·Then press SET to save the settings.

Once the Temperature has been recalibrated power the printer OFF and back on again, this should resolve the problem.

If once the print head temperature has been calibrated the printer displays ‘Head Hot’ or alternatively displays a ‘THS’ error this indicates the printer has a hardware fault. The next step would be to identify which part may be causing the problem.
I would recommend first checking the carriage cable to ensure this is not damaged and makes good contact at each end. Then you would need to look at a logic board or print head failure.

Yes it can be solved without accessing your hardware , THS -errso means thermal sensor error. just calibration the sensor from printer settings . your problem will be solve.