Philips CD620 mods, newbie here...

[bleachershane]

Hi there,
Just this weekend gone I chanced upon a Philips CD620 in a Cash Generator in Edinburgh for £19.99! It was in great nick (even still had the transportation securers underneath!) and a quick Google on my mobile told me it was a CDM4 and TDA1541 DAC... bought it straight away!

Used to have a Marantz CD84 which died earlier this year and is now in pieces, have had no luck tracking down another. I loved the build quality and the sound of the CD84 so this seemed like a good chance buy to give it whirl.

Took it home, working, playing, really nice sound! Had a look inside, board looks as good as new, no caps bloating, not even a speck of dust lol

So, it has a TDA1541A and SAA7220/B as some of you may know, the same motherboard as a few Marantz models I believe...?

I'm a newbie to CD tweaking. Where do I start on a CD player this age?

From reading these boards it seems that the general answer to this is type of question is...:
Replace caps
Put in Schottky diodes
Replace Op-Amps with more modern ones
Reclock or Replace Clock

Been reading alot about the clocks on the SAA7220 being affected by noise within the chip etc. Noticed you can get the NOS chip to replace it (but also takes out the Oversampling/Filter of the SAA7220, something I don't want to do as it seems this isn't the best solution?)
A friend of mine who is an electronics engineer says you could clean up what's coming out of the clock on the SAA7220 with a Schmitt trigger or a NAND gate (?) but I'm not sure what the best thing is to do?

Where does a newbie start, in an order going from the simple and easy and progressing to the more complex?
Any help gratefully recieved!
I am in the UK and not sure where to source good quality capacitors/components for tweaking. Usually get most stuff from my local Maplin lol

[poynton]

Check out this thread (amongst others!).

Philips CD650 mods

It has only recently started so it may be worthwhile tacking onto it rather than repeating all the same stuff over again.
Most Philips CDPs are pretty much the same.

Andy