The autopulse platform was returned to zoll (b)(4) for evaluation.Investigation results are as follows: visual inspection of the returned autopulse platform was performed and it was found that the lcd was defective, thus confirming the customer's reported complaint.A review of the autopulse platform's archive data was performed and multiple user advisories (uas) such as 18 (max take-up revolutions exceeded) and 45 (not at "home" position after power-on/restart) messages were observed on the reported event date.In addition, other user advisories (uas) such as 02 (compression tracking error), ua 07 (discrepancy between load 1 and load 2 too large), 12 (lifeband not present) and 17 (max motor on time exceeded during active operation) were observed on other dates.Please note that these user advisory messages are unrelated to the customer's reported complaint.Functional evaluation of the platform was performed and the customer's reported complaint was unable to be duplicated.Unrelated to the reported complaint, it was observed that the driveshaft was difficult to rotate.The clutch plate was deburred to address this issue.Based on the investigation, the part identified for replacement was the lcd transmissive cable.In summary the customer's reported complaint that the backlight of the autopulse platform's lcd display being unable to turn on properly was confirmed during visual inspection, however the issue was unable to be duplicated during functional testing.The root cause was determined to be that the lcd transmissive cable was defective.After replacement of the part identified during investigation, the platform successfully passed all final functional testing.
|