Krell 300cd Tray Problem

I have a Krell kav-300cd. Yesterday the door on the transport wouldn't open. A few clicking noises, but no movement. I removed the top cover to do a visual check. No signs of any issues, the clicking noise I assume to be some gear or cog in there trying to engage. Many of the parts on the transport say Teac.

Has anyone any experience with this issue and knows what the problem ? Could I be lucky and there is a replacement available at a reasonable price?
I had a similar problem with an Esoteric DV 60. I was advised to get some Teflon based lubricant, and I lubricated every moving part that seemed would benefit from the treatment. That was about three years or so ago now, and I haven't had a single problem since.

Hope it works for you as it did for me.