Sindoh M403 - Manual (Page 220)

Maintenance and Troubleshooting
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Trouble 2: Toner stains are on paper.
Troubleshooting : 1) Check if paper is properly fed.
2) The drum cartridge may have a problem.
Replace the new drum cartridge.
3) The toner is on the roller. Clean up the roller.
To prevent this problem, do not use paper smaller
than the image to be printed.
4) Set the correct paper size from the printer setting
or driver.
5) Open and close the front cover.
The roller is automatically cleaned.
Trouble 3: The toner is smeared on paper.
Troubleshooting : 1) Set paper weight to heavy and choose rough
texture from the print setting.
2) Check paper from device specifications.
3) Check if correct paper is set from the printer
setting or driver.
4) Use different paper. Printer paper provides the
best quality.
5) The toner cartridge may have a problem.
Replace the new toner cartridge.
Trouble 4: Vertical or horizontal line.
Troubleshooting : 1) The toner may be low. Shake the cartridge to use
the remaining toner.
2) The toner cartridge may have a problem.
Replace the new toner cartridge.
Trouble 5: When pie charts or bar graphs are printed, vertical lines with various widths are
printed.
Troubleshooting : 1) Contaminants such as paper powder or nap are on the head lens.
Clean up the head lens.
2) The toner cartridge may have a problem. Replace the new toner
cartridge.