Question about Samsung SCX 4521F All-In-One Laser Printer

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How to troubledhoot the LSU error on samsumg

How to troubleshoot the LSU error on samsumg scx-4521f?

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Repalce laser unit or check menu # 1931 lsu mirro test

Posted on Aug 03, 2010

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Samsung scx 4521f error lsu

Posted on Jan 08, 2014

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1 Answer

Message showing LSU Error


this is a laser scan unit error, either lsu reuires services , else needs replacement.

Nov 20, 2016 | Office Equipment & Supplies

1 Answer

Scx4521f lsu error salution vedio


kindy check the LSU cable from Main pba to LSU, that may be broken cause the LSU error,

Jan 20, 2014 | Samsung SCX 4521F All-In-One Laser Printer

1 Answer

Samsung 4521f lsu error


The Laser Scanner Unit or LSU is what writes to the surface of the drum. The glass above the cartridge inside the machine could be dirty. The mirror motor in the LSU could be bad or needing cleaned so it spins better. Laser diode could be bad.

Dec 13, 2010 | Samsung SCX-4521F Laser Printer

1 Answer

Samsung scx-4521f lsu erarr problam


kindly check the LSU main pba cable damaged or not ?

no problem found, kindly check with the replacement of Main pba or LSU.

Feb 26, 2010 | Office Equipment & Supplies

2 Answers

My paper is getting stuck on roller for laser printer scx-4521F, when remove paper and open door to reset printer, paper goes through and then jams again on new job.


open the front door and take the cartrige out.
if it jams at the black roller. you must clean the pickup roller.
you will see it at the back of the unit in the center.

Nov 11, 2009 | Samsung SCX 4521F All-In-One Laser Printer

1 Answer

Lsu error


clean the inside dust by vaccum cleaner if not solve contact samsung technician to replace LSU

Nov 24, 2008 | Samsung SCX-4216F All-In-One Laser Printer

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