During the initial evaluation of the customer's device, physio-control was unable to duplicate or verify the reported lockup condition.Physio-control then replaced both the system controller (sc) and user interface (ui) pcb assemblies which, at the time, was a repair unrelated to the originally reported issue.Physio later examined the removed sc pcb assembly and verified the reported lockup condition.Physio determined that the cause of the failure was an integrated circuit (ic) chip, designator u61.The removed ui pcb assembly was an ancillary part and there was no failure of this assembly.
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