Disc door keeps opening.

laser dirty or faulty

Honestly, when the mechanical parts wear to this extent, you're better off to buy a new CD/DVD player, since they are so much cheaper than repairing older units.

It's the belt inside the machine - open tray and look in front left side and you will see it. Easy to change out with new one.

Optical pick up replacement required to rectify this problem

Hi. there is a tiny limit switch that regulates the actual CD platform drawer(The part where you lay down the CD). this switch if faulty. it is designed to shut of the load motor when the CD tray is fully inside the unit.

this limit switch must be replaced. this is a job for a qualified Yamaha service tech. contact Yamaha for this repair.

Hi...
I use a place called
www.studiosoundelectronics.com
or
matelectronics.com

Studiosound will even tell you how to measure your belt if you need to

Godspeed,

Scott

This model has a belt used for loading the cd mech, after you push play if the belt is slipping or gone,the door will open, if you take the cabinet off eith power off and traopen, look at cd mech you see a belt, it may be loose or gone

If you trust yourself enough to open the case w/o breaking stuff, then open it up UNPLUGGED, locate the laser lens (small,clear,plastic) gently clean the lens with a swab of lens cleaner for glasses.
Also clean the chrome runners that the laser assembly tracks on.

your tray is out of track, have to place it back. not that easy but you can try. dont force it of you can damage the tray or gears