During preventative maintenance (pm) of the autopulse platform (s/n (b)(4)), the zoll service personnel found that the lcd screen was dark/unreadable.The root cause of the observed issue was the defective processor board, likely due to the age of the device, wear and tear.The autopulse platform was manufactured in january 2011 and is over 10 years old, well beyond its expected service life of 5 years.During visual inspection, the front enclosure was observed cracked, unrelated to the noted lcd screen issue.The observed physical damage is likely attributed to user mishandling/neglect.There is no documented report showing that annual preventative maintenance (pm) was performed by zoll since the device was acquired by the customer in 2011.The front enclosure was replaced to address the issue.The autopulse platform was further examined, and it was noted that the power distribution board revision level was below 6, attributed to the age of the platform and unrelated to the noted lcd screen issue.The power distribution board was replaced to address the problem.The autopulse platform passed the initial functional test without any fault or error.A load cell characterization test was performed and verified that both load cells were functioning within the specification.During functional testing, the zoll service personnel noted that the backlight of the display flickered briefly when the platform was powered on, and it went dark afterward.Troubleshooting the problem determined that the processor board was defective, causing the lcd backlight issue.The defective processor board was replaced to remedy the fault.Following service, a brake gap inspection was performed and verified the brake gap was within the specification.The autopulse platform was subjected to a run-in test using the 95% large resuscitation test fixture (lrtf) with known good test batteries until discharged without any fault or error.Historical complaints were reviewed for service information related to the reported complaint, and there was no previous history of complaints reported for autopulse platform with serial number (b)(4).
|