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Quick Part Confirmation

The azimuth drive control board on Dome 3 is showing intermittent Vref collapse on the op-amp cluster. I can see two c…

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The same job, four heights

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CDecide — “help me choose”The azimuth drive control board on Dome 3 is showing intermittent Vref collapse on the op-amp…+
The azimuth drive control board on Dome 3 is showing intermittent Vref collapse on the op-amp cluster. I can see two candidate replacement parts in stock: a complete op-amp quad module and an assembled amplifier daughterboard. I have one hour before the day shift orders. I don't want to look foolish if the wrong part arrives and the dome sits idle. Tell me whether this is likely a single op-amp failure, a board-level fault, or systemic power rail damage, list the simplest checks the tech on site must run and the single part I should authorize now. Keep the risk I'm willing to accept to 'if I'm wrong, we can swap the module within a shift' and nothing more.
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.

The real tasks

1 of them
I found a failing board and need a quick part confirmation before I order the wrong module

Who does this

1 roles
Electronics Technician (Observatory)

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