220-1101 Question 345
Single answerSpecial thermal paperA retail store's point-of-sale receipt printer has started producing blank receipts after the paper roll was replaced during a busy shift. The printer powers on, feeds paper normally, and reports no error lights. The technician confirms the printer is a direct thermal model. Which action should the technician take FIRST to restore printing?
- A
Flip the paper roll over and test printing again
- B
Replace the paper roll with standard inkjet paper cut to size
- C
Clean the thermal printhead with compressed air only
- D
Install the manufacturer’s ribbon cartridge and recalibrate the printer
Show answer and explanation
Correct answer: A
Explanation
This question tests practical troubleshooting of special thermal paper in a real POS environment. Direct thermal printers use heat-sensitive paper and do not require ink, toner, or ribbons. A very common field issue is loading the thermal paper with the coated side facing away from the printhead, which results in blank output even though the device appears to function normally. Best practice is to verify the media type and paper orientation before moving to more advanced troubleshooting. Many printer manufacturers document that direct thermal media must be installed correctly and that plain paper cannot substitute for thermal paper. A quick field check is to scratch the paper surface with a fingernail or coin; the coated side typically darkens if it is thermal paper.
- A. Correct.
Correct. Direct thermal printers require special thermal paper with a heat-sensitive coating on the correct side. If the roll is installed backwards, the printer may feed normally but produce blank receipts because the printhead is applying heat to the non-coated side. Checking paper orientation is the fastest and most appropriate first troubleshooting step in this scenario.
- B. Incorrect.
Incorrect. Standard inkjet or plain paper will not work in a direct thermal receipt printer because there is no ink or toner involved. These printers rely on specially coated thermal paper that darkens when heated by the printhead. Using the wrong media would not restore printing.
- C. Incorrect.
Incorrect. A dirty printhead can cause faded, partial, or inconsistent output, but this scenario points more directly to a media issue because the problem started immediately after the paper roll was replaced and the printer still feeds correctly. Also, compressed air alone is not the standard method for cleaning a thermal printhead; approved cleaning materials are typically recommended.
- D. Incorrect.
Incorrect. Ribbon cartridges are used with thermal transfer printers, not direct thermal printers. The scenario explicitly states the printer is a direct thermal model, so installing a ribbon would not apply. This distractor targets confusion between direct thermal and thermal transfer technologies.