Schiller AT-102, Service Handbook

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3.14
AT-102 Service Handbook
Thermal Printer Check
Print Head Alignment and Print Head Tension
The print head tension (the pressure that the print head exerts on the printer paper) is
achieved with two springs exerting pressure on the print head: the print head tension cannot
be adjusted. Similarly print head alignment is fixed and cannot be adjusted. If the print head
tension or print head alignment is not correct change the printer.
Thermal Printer Fault Diagnosis
Possible Printer Problem Corrective Action
Paper jams or does not stop at
correct position. Clean paper mark detector with a 70%
alcohol solution. Allow to dry completely.
Ensure that good quality, fresh paper is
installed.
Change the PM detector / Change the
Printer Motor / changes the complete
printer
Printout uneven; Fading at top or
bottom. Check evenness of spring pressure of the
printer to roller.
Check roller for wear and symetry.
Clean print head (pixel array) with alcohol.
Ensure that good quality, fresh paper is
installed. Change the printer, change the
main board.
Faulty pixel. Clean print head (pixel array) with alcohol.
Replace printer.
Printout too faint or too dark;
General quality poor. Clean print head (pixel array) with alcohol.
Ensure that good quality fresh paper is
installed. Change printer , change main
board.