(b)(4).The laser machine was examined and tested at the customer location by an abbott field service specialist (fss).When reviewing the error log, the fss confirmed there was a 209- z galvo position check error at 4 seconds remaining to complete the procedure.Although, the error was confirmed in the error log, the fss was not able to duplicate the error.The fss performed 10 test procedures before any service of the system.All test procedures were completed successfully without any errors displayed.No issues were observed during the z scale calibration.The fss proactively replaced the z stepper motor, optimized vertical overlap and pocket overlap flap parameters.After replacement of z stepper motor, the fss performed an additional 25 test procedures without any errors appearing.The field service specialist (fss) performed a checklist and verified all modes of operations.The unit meets amo specifications.All pertinent information available to abbott medical optics has been submitted.
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