Digital booths
Use repeated marks to locate a dye-sub printer fault
A regularly spaced defect may follow the printer’s roller rather than the image.
A faint dent, line or smudge that repeats at the same interval on successive dye-sublimation prints can come from a printer component. Compare several sheets and inspect both the image side and reverse before changing a colour profile or retouching the file.
Measure the pattern across sheets
Keep two or more affected prints in feed order and mark where each defect appears relative to the sheet edge. If the interval repeats physically across separate images, save the original files and compare their pixels; a mark that exists on paper but not in either file points downstream of image rendering.
Check the reverse as well
DNP’s DS-RX1HS manual lists regular-interval indenting and a dirty print reverse as clues associated with the platen roller. It also notes that print-head contamination can cause unevenness or poor fixation. These observations apply to the named printer family; other printer designs may have different patterns and service procedures.
Follow the model service guide
Record printer model, media set, defect spacing and which surface is marked. Use the current manufacturer manual for any inspection or cleaning step, and let service staff handle procedures outside the operator instructions. Do not compensate by sharpening or changing colour in the photo file when the defect repeats on the physical sheet.
Sources & further reading
Sources for the specific facts and product descriptions above. Our worked examples, interpretations and practical suggestions are original editorial guidance.
- DNP, DS-RX1HS User Manual, English version 3.02Photo-printer manufacturer product manual