AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
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EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Sat Mar 29 12:30:53 2025
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<p> <table width="98%" align="center" cellspacing="1" style="border:1px solid #486090;"> <tbody> <tr> <td cellpadding="3px" style="background-color:#486090; font-weidht:bold; color:white;">Quote:</td></tr> <tr> <td cellpadding="10px" style="background-color:#FFFFB0;"><p>Carried out some further work on failed mezzanine modules.</p> <p>Inspected them externally and removed the copper block, internally with a bench microscope.</p> <p>Found two obvious faults ..... broken components with scrambled pcb tracks.</p> <p>To help determine problems with loading control registers I've added a new menu item in the ASIC control window to allow all four ASIC return values to be checked. This is only useful at the mezzanine test system.</p> <p>Tested 7 that were labelled as faulty. Failed all of them. 2 with broken components and 1 with some broken bond wires. </p> <p>Tested one fresh from the cupboard. It failed with over current on the +5v psu ( > 4A! ).</p> <p>I propose to create a method of testing these mezzanines which allows better access to the power supply regulators ( LT3080 ) and the associated control voltage.</p> <p> </p></td> </tr> </tbody> </table> </p><p> </p>
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