Help with Sony PS-X7 auto return and start/stop

[trickert]

I have a Sony PS-X7 that mostly runs, but with two issues. I'm hoping that even though I'm a noobie when it comes to turntable repair, it might be possible to fix both, if I can get some guidance.

Issue one: the auto start and return semi works. It works with coaxing, such as when I turn the turntable a bit on its side. I've opened up the bottom of the TT, and it looks as if it has had fresh grease put in, but perhaps not properly. However, I did notice a white plastic sleeve around a shaft, and this plastic sleeve is cracked. I'm including a picture below. I've scanned the forums on this issue, and while there's a good bit out there, none of it was clear enough for me to know where to start with this.

Issue two: the contact controls for start/stop semi work. Pressing start will usually start the platter spinning, and sometimes it will engage the automatic tonearm; but sometimes it won't. And even in manual mode, it doesn't always release the tonearm riser, so it is impossible to lower the tonearm. Pressing it again to return the tonearm seldom works, and seldom stops the platter. However, running my finger quickly back and forth across start/stop and repeat will frequently get it working, either to start or stop spinning. Weird. Is this fixable, perhaps with cleaning or something? I've loosened the control panel so I can get a little access. I'll show a picture of that, too.

Any advice or guidance on either of these two issues would be welcome. Pics below, Thank you!

Thomas

 

[trickert]

In particular, can the cracked white plastic sleeve be glued while in place?

 

[trickert]

Any suggestions?

 

[cgutz]

I don't see any pictures..?

 

[trickert]

I can see the pictures... hmmm. I'll try uploading them as files, too. Here they are:

 

[Tonoje]

That cracking is a common issue. There are detailed threads, with photos, somewhere online on other Sony decks such as PSX5, PS4300 that use the same part. It can be glued with contact cement and also reinforced with a cable tie. Be aware that the post at the other end of that part can also break quite easily. It engages with, or acts on, the metal lever, and if something isn't right in the post-repair setup or you're testing the mechanical action by hand, it can snap.

 

[KentTeffeteller]

That cracking is a common issue. There are detailed threads, with photos, somewhere online on other Sony decks such as PSX5, PS4300 that use the same part. It can be glued with contact cement and also reinforced with a cable tie. Be aware that the post at the other end of that part can also break quite easily. It engages with, or acts on, the metal lever, and if something isn't right in the post-repair setup or you're testing the mechanical action by hand, it can snap.

And that plastic part is the major weak point on this series of Sony automatics. And usually what caused many to be parted out. Be nice to see somebody 3D Print a better replacement part beefed up over Sony's original part, help save these classics (and when working correctly, I really love them).

 

[Tonoje]

and when working correctly, I really love them

Seconded!

By the way, Trickert, I think there's supposed to be a black rubber cushion on the post at the end of that part. Fits round it like a sleeve. Have a look at the diagram in the service manual. If it's come off inside the deck or is on your floor somewhere, you want it. Worst case though, you can improvise a replacement.

 

[trickert]

I tried to be careful about keeping track of all parts--I'll look for the "black rubber cushion."

I'll try the contact cement to fix the crack. I'll report back, and if there's any interest, I'll send a picture.

Any advice on fixing the start/stop switch?

 

[Tonoje]

I found the thread I had in mind. May as well jump straight in on the second page, which shows the cushion (post #24). But you'd do well to read the rest of the thread too.

https://audiokarma.org/forums/index.php?threads/sony-ps-x7-speed-problems.797152/page-2

The start/stop switch may just need a good cleaning, inside and out. They're a bit quirky.

These decks can be brought into good working order, but take it slowly and carefully. There can be a lot to deal with, and some parts of the deck are not so easy to access. Take photos or keep notes so you'll know how to put things back in the right order.