How can I repair my Sony Discman ESP D-E300AN?

If, as is very likely, an extensive Google search hasn’t given you the instructions you need then it’s very unlikely you’ll find them I’m afraid. There’s a small chance you might find a service manual, possibly at yandex.ru or baidu.cn which might just help.

If the cases of the two devices are mechanically the same (except for markings) it ought to be possible to swap the electronics but it may be very fiddly, especially reengaging any springs. Also, hard to tell what is meant to snap apart and what is glued or will break if you try. The iFixit Jimmy is invaluable for cracking open the two halves of a shell.

Hi @sunrisein2020 ,

Not what you’re after but here’s a link to a service manual for the player.

It gives a breakdown of the mechanical sections but unfortunately there is only an electrical parts list and not a full mechanical parts list, only a parts list for the optical pick up section.

May be of some help if you have electrical problems with the player.