Was curious so was snooping around the net and found this:http://www.ebay.com/itm/Vintage-Sony-PS ... 7675.l2557
If working this was a stea..... I mean deal.
This unit was probably direct competition to the Technics cover supported tonearm utilizing T4P / P - Mount cartridges.
I believe they are fairly reliable, unless they've been completely abused, it should be the usual stripping of the old greases, relube with modern lubricants and replacing worn tonearm drive belts to get the unit working. Every once in a while, the bulb / light for the automatic record size detection system has to be replaced. If the vertical cueing electric linear motor is shot, then it may involve more troubleshooting than the usual turntable.
These units may have fallen out of favor due to the limited availability / selection of T4P cartridges. Conversely, setup of this turntable is basically plug and play and should sound pretty good right out of the box.
The links above are used for reference only, no affiliation.
Music is Everything....Except Predictable....WFUV Fan.