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Sharp mx-3111u error u2-91 - Sharp Office Equipment & Supplies

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Hi,
The error you have is a miscommunication between the PCB's within the copier.
To reset the machine you will need to enter simulation mode.
Make sure the machine is in COPY mode.
You need to press the following 4 keys in quick succession:
#*C*
Once in simulation mode enter 16 & press the copy start key.
Then press EXECUTE, then YES then press the CA key.
The machine will then restart.
IMPORTANT! Do not enter any other simulations as this could render the copier inoperable.
This will reset the U2 error. If the code is still there after resetting the machine then it is likely you have a PCB failure which will require the intervention of an authorised dealer.
Hope this helps.
Dave.

Posted on Jan 30, 2017

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Posted on Jan 02, 2017

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