I've really done it this time...turntable issue.

Brawndo

Member
2012-12-06 4:14 am
I should start by mentioning that I have a compulsion to take apart, and occasionally "improve" all of my older electronics. The taking apart usually goes fine. My "improvements" don't always end well.

My latest possible casualty is my turntable. It's a Pioneer PL-7 direct drive. I thought it a good idea to lube the motor because I needed an excuse to take it apart. The motor is very wide and flat and sits on a circuit board and hovers just above it. On the underside of the board is a cage-like (terrible description but all I can think of) piece that the spindle is attached to and appears to be pressed into a bearing. This part is screwed onto the board, and when unscrewed, the it comes off the board a little bit, as it's what is holding the motor above the board. (I can attach pictures of all this if it helps).

This piece also has a little bit of spring to it when pulled away from the motor. Here is where I feel I may have screwed up. I did not pull on it hard in the least bit, but since I've put everything back together, the motor just kind of stutters. Moving forward in short pulses, then springing backward.

I'm hoping someone is familiar with these Pioneer motors. Is this a mechanical issue or electrical? Can the motor be disassembled further to assess?
 

kevinkr

Administrator
Paid Member
Bad connection or cold solder joint somewhere? Does it turn freely by hand (when unpowered) or is it binding? Did you test it with the platter on? I have had DD TT that did all manner of odd things with the platter off, and worked just fine with the platter on. (Control loop behavior and normal in those designs)

Pictures are always good. Me like pictures. :D
 

billshurv

Member
Paid Member
2014-03-01 11:53 pm
I currently own two fully restored and functional TD-124s, and am about to start working on a Garrard 401... LOL So perhaps a second table could be fun. Old belt drives or idlers are a lot of fun..

Stopit you. I'm looking at Lenco GL75s on ebay and trying my hardest to resist getting yet another rotating project. Currently there are the bits for 2 complete lencos (failed projects) that they want £50 for.
 
Stopit you. I'm looking at Lenco GL75s on ebay and trying my hardest to resist getting yet another rotating project. Currently there are the bits for 2 complete lencos (failed projects) that they want £50 for.

You can never have too many rotating projects until you don't have the space for them.. ;) You know you want to.. ;) ;) I solved this problem by passing those "extra" tables along to other "victims." I once sold one on eBay (TD-125) and regretted it due to problems with 3rd party packing. Never again.. lol

The others given away; a Russco Studio B, and a completely DIY belt drive table on phenolic plinth with Linn arm.
 

billshurv

Member
Paid Member
2014-03-01 11:53 pm
Yeah space. I can't get at anything in the shed for turntables already. But eventually I will get more space. The hope is that by then there will be plenty of failed lencos in bits coming up for sale.

Mind you a GL69 currently at 99p. Nasty platter, but can be upgraded to heavy platter. But figured having a belt drive, a DD and a rim drive would cover all bases...