Denon DN-S3700 - Disc eject problem

I have a problem with my Denon Dn-S3700 dj player. The Denon Dn-S3700 player neatly retracts the disc and reads it. The CD player plays every CD without any problems … The problem occurs when the disc eject button is pressed … Disc ejection starts but it seems as if the mechanism is slipping and there is no power to eject the disc out of the player … the CD literally does not come out…as if it is stuck inside the player…What is the problem? is the problem in the laser or the mechanism itself? I have reviewed the blueprints for the Dn-s3700 and I see that the spare parts related to the cd mechanism state 00D3370147001 but as I can see thats the laser only … It seems to me that I should change the whole mechanism … Please your expert opinion …