hifi engine

Marantz Stereo Cassette Deck Model 5010 Shematic Diagram !!!

Good Morning old school audio enthusiasts ! Does anybody have , Marantz Tapedeck Model 5010 built 1978 in Japan,shematic
diagram ??? I have just looked at the Engine and did not find any Information ! Can somebody give me a hand with it ???
Best regards ! "marantzdude"