AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Entry time:
Wed Mar 1 16:42:06 2023
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<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>
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