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Heat from Legato

Recently, I accidentally touched the resistors on legato and got burnt. I measure the temperature and surprising me that its over 75 deg C. Further measure those underneath the BIII, they are over 80 deg C. Is it normal? Such heat may damage or shorten the BIII life.
 
There are no resistors under the BIII... What do you mean?

Which version of Legato? What voltage at the supplies? You have not given many details for us to give you an answer. 🙂

An any case - both circuits were designed to be used at their indicated supply voltages. You should not have any issues if you stick to the numbers.
 
Mine ran hot too, as I was setting it up (balancing off-set, etc). The main problem I have is the rails draw vastly different currents, and the resistance to ground for the V+ rail is about 2K ohms, for the V-, its about 9 Mohms.

I am still trouble shooting it, but it would helpful to know what the rails resistance should be, roughly. Which of the rails on my board has a reasonable resistance?

Thanks.