Control Carrier Board (CCB) Damage (ISS-95470.01)
CCBs installed in the first LRU32 preproduction units were found to not operate properly when received at LLNL from the integration vendor on 02/07/2023 during integrated testing of low voltage and high voltage as the first steps of validating a functional LRU for physics qualifications. CCB version dated 12/10/2021 was found to not accommodate a design change approved 09/28/2022 , which led to damage occurring during testing. The test stand holding pins would interfere with the location of a resistor due to CCB design modification and pressed on the resistor causing damage. Communication deficiency is identified as cause of issue.
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