The device was not returned to olympus for evaluation.But a field service engineer (fse) was onsite where the customer's complaint was confirmed.The fse cleaned the inside of device, including the fans, to ensure proper operation.A review of the device history record found no deviations that could have caused or contributed to the reported issue.Based on the results of the investigation, the error is for temperature, when the internal temperature of the light source unit has risen, and the safety mechanism is operating.A definitive root cause cannot be identified.Olympus will continue to monitor the field performance of this device.
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