Repair
Yaskawa Sigma
Sigma-7 SGD7S · SGD7W · SGD7C · Sigma-5 SGDV · Sigma-III SGDS · Sigma-II SGDH
Specialist service of Yaskawa Sigma servo drives — replacement of IGBT, capacitors in the power section, repair of control cards, service of 23-bit absolute encoders, parameterization via SigmaWin+. No-obligation quote, 12-month warranty.
Diagnostics included in repair
Priority quote
12-month warranty
Courier pickup from all of Europe
Backup and SigmaWin+ parameterization
Service Yaskawa: Sigma-7, Sigma-5, Sigma-III and older
Sigma-7 SGD7S (single axis)
Repair of single-axis SGD7S servo drives. Replacement of IGBT, capacitors, service of control cards with MECHATROLINK-III, EtherCAT, PROFINET interfaces. 23-bit encoders.
Sigma-7 SGD7W (dual axis)
Repair of dual-axis Sigma-7 SGD7W servo drives. Service of shared DC-link section, axis control cards, MECHATROLINK-III/EtherCAT interfaces.
Sigma-5 SGDV
Servo Drive Repair Sigma-5 (SGDV-xxx). Replacement of IGBT, capacitors, service of regulator cards and MECHATROLINK-II/Analog/Pulse interfaces.
Sigma-III SGDS (EOL)
Repair of discontinued SGDS (Sigma-III). EFIXLAB specialty — spare parts available for this discontinued series. Service of control cards and power section.
Absolute encoders 23-bit
Repair and calibration of 23-bit Yaskawa absolute encoders used in SGM7A/SGM7J/SGM7G motors. Service of encoder connectors and cables.
SigmaWin+ parameterization
Parameter backup via SigmaWin+ before repair. After repair, restoration of all regulator parameters and dynamic axis test before return.
Why EFIXLAB?
- Sigma-III SGDS (EOL) — discontinued series is our specialty. We have components and experience when Yaskawa declines service.
- 23-bit encoders — we repair and calibrate Yaskawa absolute encoders. Option to borrow a replacement encoder during repair.
- SigmaWin+ backup — project backup before repair, restoration after. All Pn-parameters return identically.
- MECHATROLINK diagnostics — verification of the MECHATROLINK-II/III bus after repair.
- Dynamic axis test — speed response and position response test after repair before return.
- 12-month warranty — on all performed work.
How does repair work for Yaskawa Sigma?
Request
online or by phone
Shipping
by courier
Param backup
+ diagnostics
Quote
no obligation
Repair
& axis testing
Return
with warranty
Report fault Yaskawa Sigma — no-obligation quote
Provide the Yaskawa servo drive model (SGD7S-…) and alarm description. Our specialist will get back to you with a diagnosis.
Dziękujemy! We have received your request — our Yaskawa specialist will contact you shortly.Frequently asked questions
A.740 is IGBT overcurrent — damaged IGBT transistor or motor phase short circuit. The typical repair is replacement of the IGBT module and checking the motor windings.
Yes — Sigma-III is a discontinued series, but still repaired at EFIXLAB. We have access to components and control cards for this generation.
Diagnostics: 1–2 business days. Repair: 5–7 business days after approval and receiving necessary components. Express mode for stopped machines. As a rule — repair time may be significantly extended depending on component availability and repair complexity. Deadlines are agreed individually with the client.
Yaskawa Servo Drive Repair — Sigma-5, Sigma-7, and Varispeed AC Drives
Yaskawa Electric is one of the largest servo drive manufacturers globally, with their Sigma series (Sigma-5, Sigma-7, and legacy Sigma-II/III) and Varispeed AC drives controlling motors in semiconductor equipment, packaging machines, CNC machine tools, and robotic systems. Yaskawa drives are known for their high-performance control algorithms, compact design, and reliability — but like all industrial electronics, they develop faults after extended service in demanding production environments.
Common Yaskawa drive failures include IGBT power module degradation in higher-power Sigma drives, DC bus capacitor aging, regenerative braking circuit failures, encoder/resolver feedback interface problems, control board processor and memory faults, and communication module issues (MECHATROLINK, EtherCAT, Profinet). Sigma-II drives face increasing component obsolescence, while Sigma-5 and Sigma-7 units may develop issues with their compact integrated power stages where heat dissipation is concentrated.
EFIXLAB provides Yaskawa drive repair across all product families. Our service covers Sigma series power stage diagnostics and IGBT replacement, DC bus capacitor renewal, control board component-level repair, feedback interface restoration, and communication module testing. Varispeed AC drive repairs follow similar processes adapted for the higher power ratings of these drives. We test all repaired drives under motor load conditions with appropriate Yaskawa diagnostic procedures.
Yaskawa drive repair saves 35–60% versus new drive purchase, with savings particularly significant for higher-power Sigma and Varispeed models. For legacy Sigma-II drives no longer manufactured, repair extends automation system life without costly drive replacement and re-parameterization. All Yaskawa drive repairs include motor load testing and our 12-month warranty.