We checked the returned unit and confirmed that the operation channel stuck accessory/object.Based on the result, we concluded that it was caused due to the insufficient reprocessing at the facility on the operation channel.In addition, we confirmed that the light guide cable buckled, the insertion flexible tube (ift) crushed, the remote control buttons cut, and the u/d lock lever improper adjustment; however, they are not the main cause, and/or irrelevant to the alleged complaint.Based on the technical report "hr-rpt-0588(channel)" and/or the risk analysis results, it was evaluated to submit mdr.
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