Difference: NevisLabsELogJune2021 (2 vs. 3)

Revision 32021-06-10 - MassimoCapasso

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META TOPICPARENT name="NevisLabsELog"

June 2021 eLog

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2021-06-08

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2021-06-10

  Author: Massimo
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  • Replaced U6 with new ADP3338; the power supply immediately reaches compliance, lowering voltage from input 5V to 2V roughly. Also, ADP338 immediately starts heating up, there is still a short somewhere. Check capacitors FC05/6?
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  • Performed a visual inspection with Nancy's microscope of all the components on the board, no apparent signs of broken pieces (cracks, burns...)
  • Talked to Leonardo, neither he nor Francesco L. have any better idea of what could have possibly failed; they'll try to find a spare board, re-program the FPGA and send it to us
 

2021-06-09

Author: Massimo with support from Ray

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    • FC01
  • Nothing helped
  • Asked Francesco L. for extra ideas and otherwise for spare board
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2021-06-08

Author: Massimo

  • Replaced U6 with new ADP3338; the power supply immediately reaches compliance, lowering voltage from input 5V to 2V roughly. Also, ADP338 immediately starts heating up, there is still a short somewhere. Check capacitors FC05/6?

  -- Massimo Capasso - 2021-06-08
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