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f) Contamination of the rotation detection sensor
f-1) From the main body, remove the hopper unit of a color relevant to the failure.
f-2) Be careful not to turn the hopper unit upside down as much as possible, and remove 1 screw [1].
Prepare the new rotation detection sensor (WG8-5848-000). Then replace the old rotation detection sensor
with the new one.
f-3) Install the parts. If the symptom is not reproduced, the work is completed. If the symptom is reproduced,
check for other factors.
