When we buy new device such as Sony M-540V we often through away most of the documentation but the warranty.
Very often issues with Sony M-540V 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 MP3 Player Sony M-540V is responsible for and what options to choose for expected result.
Fortunately you can find all manuals for MP3 Player on our side using links below.