Sony PS-LX500 linear tonearm rapid sliding

[macstubie]

Hello.  I am having problems with the linear tracking tonearm on my Sony PS-LX500 turntable.  I have replaced the tonearm belt with a new belt (22mm dia.) which nicely corrected the problem with the tonearm skipping, but now when the tonearm drops to the record to start playing, it immediately starts to rapidly move across the record. 

When I try using my finger to stop this tonearm movement, there is very strong pressure showing it is being pulled which some force.  I haven't found any reference to this problem on internet searches.  Would anyone in this community be able to suggest a solution?  Thank you.

[MaggieGreene]

Hi @macstubie, found this on Sony website: https://helpguide.sony.net/ha/hrar/v1/en/contents/TP0001112207.html?search Hope it solves your issue. 

[macstubie]

Hello MaggieGreene,

Thank you for contacting me.  The suggestions on the Sony Help link appear to be related to CPU, USB and temporary file storage issues which unfortunately are not something my 1980's turntable is familiar with.  The problem, I think, seems to be related to the drive belt mechanism which powers the linear tonearm.  The rubber belt itself is new and the drive shaft is clean of any grease or oil so perhaps a problem with the drive motor?  Sorry for any confusion but thanks again for trying to help which is much appreciated.