Sir try to clean the lens in disc mechanism maybe the lens got dirt.. try to visit this link to access operating manual for your player.. its free to register.... tnx..

http://www.nodevice.com/manual/newmans/teac/MC-D78pdf/get50635.html

if you think i help you plzz rate me tnxx... goodluck

Hello, how to set the time, clock in Teac mc d 78,thanks