Question about Samsung SCX 4521F All-In-One Laser Printer
LSU message always appear on screen when photocopying
The LSU error stands for Laser Scanner Unit error. The probable cause/s:
The Polygon motor in the LSU does not rotate.
The LSU’s laser beam is functioning properly.
What you can do:
Try to unplug the machine for a couple of minutes or maybe a little longer and then plug everything back in. Power on and then test.
Posted on Feb 09, 2010
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Posted on Jan 02, 2017
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