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The product was returned to pentax medical for repair.Our technician checked the returned unit and confirmed that the cfb (coherent fiber bundle) was broken.Based on the result, we concluded that it was caused due to the excessive force applied on the cfb (coherent fiber bundle).In addition, our technician confirmed that the u/d knob broken, the insertion flexible tube crushed, the control body leak, and the side body cover leak; however, these defects are not the main cause, and/or irrelevant to the alleged complaint.Based on the technical report ""hr-rpt-0586(image failure)"" and/or the risk analysis results, it was evaluated to submit mdr.
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