You might try the attached link for more information about the Philips / Marantz CD-80. http://www.audioreview.com/CD,Players/Marantz,CD-80/PRD_116968_1586crx.aspx. Most are just reviews but there is some(limited) technical information there as well. The Philips CD-80 is the same unit as the Marantz CD-80. Marantz used the Philips name in the U.S. so if you search for info pertaining to the Marantz CD-80 you may find more info. I owned onr of these units for about 10 years loved the player never had any problems with and am sorry I sold it.
Chuck
Chuck