the home of the turntable

Load pop when motor engages

snap, crackle and pop

Load pop when motor engages

Postby Meatbix » 24 Oct 2017 02:22

I acquired another turntable to tinker with yesterday, a Sharp RP-1122, pretty basic 70s belt drive unit. It runs slightly slow and the speed change doesn’t work properly, both of which I think are the fault of an improperly sized belt (too tight). It also emits a loud pop through the speakers when the motor engages. This appears to be a power spike as its evident even if the inputs aren’t plugged in, and it is reduced if the turntable is plugged into a different surge protector to the amp. Any obvious fix for this from the brains trust?
Meatbix
member
member
 
Posts: 59
Joined: 18 May 2017 08:04

New Zealand

Re: Load pop when motor engages

Postby Meatbix » 24 Oct 2017 23:53

90% sure I’ve found the problem. The unit has a Y class capacitor which appears to have failed open, and the symptoms (normal operation with line noise) match this problem. Cheap fix, will solder in a replacement and see what happens.
Meatbix
member
member
 
Posts: 59
Joined: 18 May 2017 08:04

New Zealand

Return to Turntables and Tonearms