I have an old Aiwa DX-666 cd player. It has developed a fault. When I insert a cd into the player, press play I get an "ERR" error message. It seems that the laser tries to start but can't. I suppose the laser is dead ?

G'day
If it is not reading the disc Table of Contents, you will most likely have a lazy spindle motor or laser problem. Parts are still readily available for this unit. They use an RF310 spindle motor, and the laser is a sony KSS210.
If you are inclined, you could have a go at repairing it. I suggest cleaning the laser lens with a cotton wool bud(Qtip) moistened slightly with windex, then polished with a dry one to remove any smears. Lens cleaning discs are not worth spending money on, as they seldom work.
Happy to answer any questions that you may have. Cheers
regards robotek

If the unit spins the disk but you still get this error, Then the optical laser unit would be the issue.

since this unit is discontinued I would doubt you find a part for it to fix the player.

You could try a cleaning kit, its a cd that has little brushes on it that you put inside that will clean the lens.

Thanks for using fixya.com please do leave your feedback and ratings before you go, thanks

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620