Juki Sc-120 -

Has anyone successfully replaced a capacitor on an SC-120, or is it time to buy a replacement unit? Any advice before I call a tech would be appreciated. Thanks!

I have a Juki industrial machine with an SC-120 control box. Recently, the motor has been running erratically—sometimes slow to start, other times jerky at low speed.

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Many Juki industrial machines using a 400W clutch or servo motor conversion.

Control box only (no motor or pedal). 110V version. juki sc-120

Juki SC-120 Electronic Control Box – Works Perfectly

Good working condition. All functions tested: needle positioning works, speed is smooth across the full range, and the cooling fan runs quietly. Some cosmetic scuffs on the housing (see photos), but nothing affecting performance. Has anyone successfully replaced a capacitor on an

Juki SC-120 Review: A Reliable Workhorse for Industrial Machines