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

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LSU error not printing - Samsung SCX 4200 All-In-One Laser Printer

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Laser Scanner Unit or LSU is what writes to the surface of the drum. The glass above the cartridge in the machine may be dirty. The mirror motor in the LSU could be bad or needs to be cleaned to spin better. The Laser diode could be faulty.

This is not a user-serviceable issue. You will need to contact Samsung for service. You can do it online via Samsung website or contact the vendor to see who will they appoint to service the printer to, especially if it is still under warranty.

Posted on Feb 04, 2011

  • Adam Falk Sep 13, 2011

    A repaeted LSU error can be caused by a bad door switch or loose cable in the right hand side of the printer. With the door open you will see two slots on the right side of the printer. The one in the black frame is the door switch and the one in the gray side plating goes to a LSU safety relay. If the relay switch is bad it thinks the door is open and will not allow power to the laser unit since it can be harmful to the device or person using it.

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All my printed says is: LSU Error.....PC Print Pending What does this mean!!!!!!??????????


Hi!

A lsu error is a laser unit error and i am sure that it could be expensive to replace!

Sorry!

Dec 09, 2010 | Xerox PE120i Laser Printer

1 Answer

Not able to print. printer pop up says Lsu error


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.

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XEROX WORKCENTER PE220 , ITS SHOWING LSU ERROR . ITS NOT PRINTING OR COPYING ANYTHING . PLEASE GIVE SOLUTION

Dec 17, 2009 | Xerox Phaser 8500/DN Printer

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Engine LSU error, printer will not print. Accepts paper half way then it stops.


lsu stands for laser scanning unit. it tansfers the image onto the transfer drum, common problems are horizontal sync, i would suggest a replacement lsu

Sep 24, 2009 | Samsung ML 2151N 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

1 Answer

Blank papers comes when the print given


D ear team, Blank papers comes when the print given. Meanwhile it shown the error msg is: LSU Hsync error cycle power pls give me the solution NHPC Ltd.

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3 Answers

LSU ERROR shows in display panel


The LSU is the Laser Scanning Unit or "printhead". There is a mirror in there that spins really fast, if the mirror spins too slowly (bad motor, low voltage) it gives an error. Sounds like you would need a replacement LSU. Have the printer serviced.

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