Sindoh M611 - Manual (Page 249)

5-
49
5
Maintenance and Troubleshoot
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. 4-5) .
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 printer driver.