Akai CD 57 CD Player

[hsort]

Has anybody a Service Manual of a Akai CD 57 Model? Or do someone know how to adjust the 4 Trimmers inside?
The player don't recognize sometimes the Cd and sometimes after
starting it will spring some seconds forward or backwards. The lense is cleaned.

Thanks for your answers

hsort

 

[hsort]

Akai CD 57

Hi all,

nobody here of the experts who will be helping me to bring my Akai CD ok?