A communication device includes an integrated circuit having an on-chip thermal sensing circuit that generates a temperature signal based on a temperature of the integrated circuit. The method comprises operating a source of thermal energy with a low thermal time constant, and directing it at the surface of the skin adjacent to and within a stretch mark forming first and second adjacent regions of thermally-modified tissue. The winding is between the front and rear cooling fins. By using two phase compensators, the optical pickup may be made compatible with at least three kinds of optical discs. The indicator is arranged at such a position as to face the window.