Direct Drive TT- trouble spinning (Garrard DD130-1)

[CarpetDoctor]

Howdy- picked up this used turntable and found this issue (see video).

Haven't been able to find a service manual or comparable turntable model tutorial- is this video adequate for diagnosing what might be wrong with this thing.


Turntable repair amateur here.
Thank you!

 

[Zvezda]

Put the platter on it. DD motors need the platter installed to spin correctly.

 

[Markoneswift]

Put the platter on it. DD motors need the platter installed to spin correctly.

+1 exactly what I was going to say. There's usually a magnetic strip or optical marking's or something on the underside of the platter and these are required for speed calculation.

 

[Greenie]

That motor looks like the Matsushita one used in my DD75 and various early japanese efforts. But yes, try it with the platter on.

 

[guiller]

Welcome to the AK community!

 

[CarpetDoctor]

Looks very slow

 

[CarpetDoctor]

Humming from turntable and subtle flicker of light

 

[Markoneswift]

Probably dried out caps in the FG circuit or try cleaning / calibrating the pitch control (if one is fitted). There could be caps in the pitch adjustment circuit which also need replacing

 

[Markoneswift]

I had an Akai DD that would not adjust speed down enough using the pitch control, even after it was cleaned / calibrated. I had to replace several small capacitors in that circuit and then it was fine

I also had a Technics DD with runaway speed problems. That one required capacitors replacing in the frequency generator (FG) circuit.

 

[Markoneswift]

I checked the SM for the DD75 and it states there are two motor speed trimmers directly on the motor itself - one trimmer for each speed. You should set the pitch control at mid point (after giving it a good clean) and then use the appropriate trimmer to adjust speed. According to the manual, if the motor speed will not adjust sufficiently then you have to replace the motor.....