hifi engine

Service Manuals for Denon DN-C635 & Tascam CD-450 needed.

I just started doing some volunteer work for a local, community radio station, which includes doing some repair work on their CD decks. They have a number of these Denon's and Tascam's in need of attention and I'm not having any luck finding the service manuals for either.

Thanks in advance for any assistance...