Ticking noise in Audio Research Reference CD7

Hi Elizabeth, I've opened the unit but can't see the rails. Do I have to also lift the CD tray to access those?
Is there anywhere where this process is described with pics for my layman self?
Also, I live in a very big city and there's a lot of dust/dirt/smog in the air at all times. How do you clean the guts of those units (CD 7, Ref 5, etc) that have practically no protection from all that dirt?
Thanks.

Did you expose the mechanism completely ? You need to take the player's top lid off first, then the square black metal element that covers the mechanism (it is beeing hold by 4 screws), and then the black plastic part that covers the rails (it is beeing hold by 4 allen bolts AFAIR).

Loud and clear.
I'll do just that.
Thanks.

Amuseb, I used to own the CD-7, and now the 8. If you check my System, I'm all ARC. I strongly recommend that rather than take the unit apart and fiddle with stuff you probably know very little about, that you call Calvin at the factory. He's there to help folks who own ARC gear. He will be able to diagnose the problem and advise you on what to do. It may be that the unit has to go to a service center or back to the factory. Dunno -- but Calvin will.

Hi, indeed I reached the second phase of the process and just before attacking the black plastic cover of the rails, decided to maybe discuss the matter with ARC first.
The issue for me is that, living in France, the local rep tends to charge tremendous amounts of money for service, may the sums be justified or, mostly usually, may they not.
Question: when lifting the square metallic cover, from underneath it's left side, a 1 inch long piece of a plastic tube (like the one used for shrink or the edge of the cables that run through the unit) fell into the palm of my hand. Is it possible that this piece serves for anything or is just that the person who built the unit didn't finish the cleanup properly?...
Thanks again.