Yaskawa Repair
Sigma-series Servopacks and V1000/A1000 drives are everywhere in packaging, material handling, and machine tools. Factory repair routes legacy units toward migration; we repair the exact unit you have.
Independent repair — not Yaskawa-affiliated
Yaskawa repair services
Product families we service
Sigma / Sigma-II (SGD, SGDM, SGDH)
Legacy Servopacks — power-stage and supply repairs
Sigma-5 (SGDV)
Current-adjacent generation
V1000 / A1000 / GA500 VFDs
Small frames up to 25 HP
Categories: Servo Drives · VFDs / AC Drives
What fails on Yaskawa hardware
Across the Yaskawa equipment that reaches our bench, a handful of faults account for most of it. Electronics age in fairly predictable ways, which is exactly why board-level repair works.
Yaskawa Servo Repair
Power stage failure
What you see: Overcurrent alarms or an immediate trip on enable.
Why: Failure of the output power devices, usually precipitated by a motor or cable fault downstream of the drive.
Before you ship a Yaskawa unit
- □Megger the motor and its cable before condemning the drive. A shorted winding or a cable chafed against the machine frame will destroy a replacement drive exactly as fast as it destroyed the first one.
- □Record the alarm code and what the machine was doing when it tripped — during acceleration, at speed, on a hard stop, or only when warm. That distinction separates a power-stage fault from a thermal or feedback fault.
- □Check whether the cooling fan still spins freely and whether the heatsink is clogged. If the only fault is a thermal trip, cleaning and a fan may fix it on your bench.
- □Confirm incoming line voltage and phase balance. Repeated drive failures on one axis are often a supply or wiring problem the drive is simply reporting.
- □Note your parameter set if you have it recorded. Drive parameters normally live in the CNC or the drive's protected storage and our physical repairs do not touch them, but a record is worth having.
Repair or replace?
Servo and spindle drives are where repair economics are most favourable: the hardware is expensive, frequently obsolete, and often tied to a specific machine and parameter set. New replacements for older platforms are commonly quoted at multi-week lead times when they are available at all, and a like-for-like replacement still has to be parameterised and commissioned against the machine. Because a drive failure usually stops the machine outright, the number that matters is rarely the invoice — it is how many production days pass before the axis turns again.
Yaskawa part numbers
Control Board Lab is an independent industrial electronics repair company. We are not affiliated with, endorsed by, or an authorized service center for Allen-Bradley®, Rockwell Automation®, Siemens®, FANUC®, Mitsubishi Electric®, Yaskawa®, ABB®, Schneider Electric®, Pro-face®, Omron®, or any other manufacturer named on this site. All trademarks belong to their respective owners and are used for identification only.
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