Philips CD100 & Marantz CD73: vibration sensitive as to loose tracking ?

david winter

Classical music lover.
Hi,

Although not a specialist to restore early CD players, I got a Philips CD100, CD300 and Marantz CD73 recently.
I didn't check with the CD300 but both CD100 and CD73 loose tracking (jump) if I touch the table they are put on.
It looks like their tracking became weak and I would like to know what are the typical failures.
I recaped the power supplies on both. On the CD100 I replaced all those blue Philips capacitors which were dry. On the CD73 I only did the side (vertical) board.
Both had a number of cold solders repaired.
The CD73 has a somehow loose carriage which opens by itself if put on a diagonal position.
As for tracking and possible adjustments / measurements, any help would be much appreciated.
I would really like to bring these players to excellent working condition.
Thanks in advance.
 
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