When we buy new device such as Master Appliance UT-40Si we often through away most of the documentation but the warranty.
Very often issues with Master Appliance UT-40Si begin only after the warranty period ends and you may want to find how to repair it or just do some service work.
Even oftener it is hard to remember what does each function in Soldering Gun Master Appliance UT-40Si is responsible for and what options to choose for expected result.
Fortunately you can find all manuals for Soldering Gun on our side using links below.