How do I get out the tape stuck in the Audio of Panasonic RX-FS 410?

After playing the tape on the Audio taperecorder of Panasonic RX-FS 410 when I want to replace the tape , it gets stuck repeatedly. I showed the set to some mechanics (professionls) who repaired it more than two times and the problems still persists. I finish playing the tape and want to take it out to replace with another one,it gets stuck and does not get ejected, and does not run even that time. But,sometimes, suddenly it opens and it apears as if all is well, but the problem comes again and again. In this situation I want to know how do i remove the tape without opening the player up.