Philips (Black Tulip) N5748 HIFI Cassette Deck

A very good day to you at MFBfreaks.nl;

I have a Philips (Black Tulip) N5748 HIFI Cassette Deck; it will no longer play a cassette, it can still fast forward and rewind.

http://www.vintagecassette.com/Philips/N574 8"> http://www.vintagecassette.com/Philips/N5748

It is part of the Black Tulip range that you manufactured in the 1980’s.

I am looking for help with repairing this; have no service manual, not a good start!