Sindoh M403 - Manual (Page 223)

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Maintenance and Troubleshooting
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Trouble 13: Toner stain or shadow in the background.
Troubleshooting : 1) Check if the cartridge is properly installed.
2) The toner cartridge may have a problem.
Replace the new toner cartridge.
3) The drum cartridge may have a problem.
Replace the new drum cartridge.
4) The toner exists in the paper path,
Contact the customer support.
Trouble 14: Thick or rough paper drops print quality.
Troubleshooting : See 「Paper Setting Table」 (P. 4-3). Set Paper Texture and Paper Weight
to Rough and Heavy respectively.
Tray 2 Troubleshooting
Trouble 1: The device does not work or stop in the middle of operation after the tray 2 is
installed.
Troubleshooting : A. Switch off the device, wait 10 seconds, and then switch on the device.
If the problem continues, check if the tray 2 is properly connected to the
device.
B. Check if the tray 2 is set in the device driver.