Sharp MX-5500N 操作ガイド

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CLEANING THE BYPASS FEED ROLLER
If paper misfeeds frequently occur when feeding envelopes or heavy paper through the bypass tray, wipe the surface of 
the feed roller with a clean soft cloth moistened with water or a neutral detergent.
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Close the front cover (lower).
• If this does not solve the problem, pull the knob out and push it back in 2 more times.
• When pulling and pushing the knob to clean the charger, pull and push the knob slowly from one end to the other.