The device was returned to olympus repair center for evaluation.
The evaluation of the device confirmed followings; defects of the circuit boards were noted.
The reported events were caused by the defects.
Rusts were found around the rear panel connector, part of the interior, and part of the circuit board.
Due to the defects of the circuit boards, the buzzer did not sound when the key on the front panel was pressed.
If additional information becomes available, this report will be supplemented.
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The user facility said that the endoscopic image was intermittent.
Then, during the evaluation of the device by olympus, the endoscopic image became black and white when the picture-in-picture function was on.
There was no report of patient injury associated with this event.
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