Question about Samsung SCX 4200 All-In-One Laser Printer

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IT SAYS LSU ERROR ON MY SAMSUNG SCX4521f WHAT DOES THIS MEAN

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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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SOURCE: i m using samsung ScX4521f

Laser beam Scanning unit window (thru which the beam travels from the laser unit to the drum in the cartridge) be cleaned. If error persists the LSU assy needs replacement if the wiring harness is not damaged.

Posted on Feb 19, 2011

  • 2 Answers

SOURCE: lsu error on samsung scx4521f, what can i do

SAMSUNG SCX-4521F

After 3.4 print paper will gam and show error lsu
how to problem fix.

Posted on Jul 20, 2010

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1 Answer

Lsu error on samsung scx4521f, what can i do to fix the problem


The laser unit has gone bad, needs to be replaced, the part number is JC59-00023A.

http://www.iteminconline.com/jc59-00023a_jc59-00023a-samsung-scx-4521-unit-lsu-ml-1610-16-20p.htm

Jan 10, 2016 | Samsung Office Equipment & Supplies

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I have a samusung scx4521f showing error code {LSU ERROR]


Check both ends of the Flat cable between the scanner unit and logic PCB. Trim edge of the damaged ends by about 1 mm (if damaged). Clean the mirrors of the LSU. Turn on and try. Service manual can be Down loaded from the internet if required.

Apr 29, 2014 | Samsung SCX 4521F All-In-One Laser Printer

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

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How to resat memory scx4521f


what memory you mean ?
toner low indication or count ?

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

1 Answer

I m using samsung ScX4521f . pls tell me how i remove lsu error


Laser beam Scanning unit window (thru which the beam travels from the laser unit to the drum in the cartridge) be cleaned. If error persists the LSU assy needs replacement if the wiring harness is not damaged.

Oct 19, 2010 | Samsung SCX 4521F All-In-One Laser Printer

1 Answer

What is mean by LSU error of samsung all in one printer ? how i can overcome this problem ? Because of this LSU error i m not able to take printout ? plz help me. my printer model is SAMSUNG SCX-4521F


LSU = laser scanning unit. I have a similar problem and i solved it by reseting my printers memory. You must enter tech mode. --> Data setup --> Clear all mem

Jul 29, 2010 | Samsung SCX 4200 All-In-One Laser Printer

3 Answers

Have lsu error also.


Hi ...

LSU stands for Laser Scanner Unit ... you normally get 2 different kind of errors with LSU ...
LSU Hsync or LSU Motor Error ...
If you get this error, it means that the Laser Scanner Unit has gone bad and the only way to get it fixed is to get the printer repaired ...

Cheers ....

Jul 28, 2009 | Samsung SCX-4100 All-In-One Laser Printer

6 Answers

Samsung scx-4521 f


if it's a vertical line in scanned pictures, it's probably a dust bunny on the scanner head, if it's only on printed pages, it's probably a dust bunny on or in the laser assembly or between the laser and the photosensitive drum. if cleaning doesn't get rid of it, you could have a defective scanner head or laser assembly, or a scratch on the photosensitive drum.

Jun 27, 2006 | Samsung SCX 4521F All-In-One Laser Printer

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