Update....
Paul brought the CD2 to me this morning for me to have a look at. Here's what I found:
The reason why the tray wouldn't open/close properly is because someone had fitted a doubled-up elastic band in place of the proper belt!
P1110359 by
Michael Pickwell, on Flickr
Luckily I had one 'in stock' so it was duly changed for the correct thing.
P1110360 by
Michael Pickwell, on Flickr
Paul mentioned that the player also had a tendency to skip a bit more than he thought was normal, despite it having a brand new laser, so I had a look to see what I could do about that too.
First things first, I gave the laser lens a clean.
P1110361 by
Michael Pickwell, on Flickr
The slide rail for the laser head also got a clean and relube.
Being a Sony based mechanism the CD2 has the usual adjustments for Focus Gain, Tracking Gain, E/F balance and Focus bias.
P1110362 by
Michael Pickwell, on Flickr
I found the focus gain to be set very high so I knocked it back a bit. I find it best to set FG and TG by ear these days (listening to the laser emitted by the pick-up not the speakers!).
I also managed to find a suitable test point for observing the RF eye-pattern so was able to adjust the focus bias for max pk-pk amplitude and best eye-pattern.
P1110363 by
Michael Pickwell, on Flickr
Ideally I would have liked to have checked the E/F balance too but I couldn't locate the correct test point for TE without a service manual.
I gave it a quick test in my main system and I can confirm that it's a nice sounding player with a smooth, rich and non-fatiguing sound.
I hope it's trouble free for you for a good while Paul.