You need to tell us what arm this is. The top Sony arms of that era were the PUA-237 and PUA-286 and they are fairly complex to set up.
You can google those names and see if that's what you have. If so, I have the user's manual for them.
Kal
You can google those names and see if that's what you have. If so, I have the user's manual for them.
Kal