The present invention is a method and system for non-intrusively dispatching service requests in a service node nested in a service topology. In an optical disc drive according to an embodiment of the present invention, each line forming a differential transmission line is divided into a plurality of lines of the same quantity, the quantity being two or more, at or near a connection point between a flexible line and the optical pick up. The arrangement of the disclosed embodiment of the present invention includes a voltage regulator such, for example, as a pulse width modulation circuit for the alternator.