The phrase "to do some adjustment" means making small changes or corrections to something in order to improve it or to make it work better.
Sentences with «to do some adjustment»
Remove and Replace wires and do adjustments on patients treatment. (livecareer.com)
Sure, you would have to do some adjustments in your lifestyle, especially with your dating life, but aside from that, life goes on. (herpesdatingsite.biz)
However, some companies will do adjustments as long as they carry the item at full price. (thecollegeinvestor.com)