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Sc 491

Error massage displayed sc 491

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Posted on Jan 02, 2017

Daniel S
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SOURCE: RICOH SP C811DN has error SC 491. What is this and


Error code SC491 means laser cooling fan locked and this is an internal error and should be checked/tested by a professional. Hope this helps...please post back for further assistance.


Posted on Jun 28, 2011


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SC 491 error message

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Sc491 error on ricoh MPC 3500

Sc 491 straight from manual

High voltage power: Drum/ development bias output error
An error signal is detected for 0.2 seconds when charging the drum or
 High voltage leak
 Broken harness
 Defective drum unit or development unit
 Defective high voltage supply unit

1. Check or replace the harness.
2. Replace the drum unit or paper transfer unit.
3. Replace the high voltage supply unit.

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