Discontinued & Obsolete Drive Repair
Your production line was built around a drive that's no longer manufactured. Rather than retrofit the entire machine, let Synchronics repair it at the component level — we specialise in discontinued AC drives, VFDs, and DC drives from every major manufacturer.
Replacing a discontinued drive costs Rs 3–10 lakh in parts, rewiring, and downtime. Synchronics repairs your obsolete drive at the component level for Rs 8,000–50,000 — keeping your machine running without an expensive retrofit.
India's manufacturing base is full of machines built in the 1990s and 2000s, running drives that were discontinued by their manufacturers years ago. When a Siemens Micromaster 3, ABB ACS300, or old Danfoss VLT 3000 fails, the options appear to be: pay Rs 3–10 lakh to retrofit a modern drive (including motor rewiring, PLC reprogramming, and panel modification) or pay Rs 8,000–50,000 to have Synchronics repair it at the component level. We have the schematics, the obsolete component inventory, and the 32 years of expertise to repair drives that nobody else will touch.
Diagnosis Guide
Common Discontinued & Obsolete Drive Problems We Fix
Experiencing any of these symptoms? Our engineers have diagnosed and repaired thousands of these faults.
Drive Simply Not Available New
OEM says "end of life" — no replacement available. Machine cannot run.
Drive discontinued 5–15+ years ago, no new stock in the supply chain
Retrofit Cost Prohibitive
New equivalent drive requires motor rewiring, PLC reprogramming, panel modification — total cost Rs 3–10 lakh
Modern drives have different control interfaces, communication protocols, and physical dimensions
IGBT Module No Longer Manufactured
Power stage failure, overcurrent trip, drive won't output to motor
Original IGBT modules discontinued — require equivalent-spec modern replacement or hybrid solution
Control Card Failure
No display, erratic behaviour, communication loss, parameter corruption
Electrolytic capacitor ageing, DSP chip failure, EEPROM corruption after 15+ years
Capacitor Bank Degradation
Drive trips on undervoltage, hum from capacitors, DC bus instability
Electrolytic capacitors dry out after 10–15 years — common in old drives still in service
Operator Panel / Keypad Failure
Cannot access drive parameters, display blank, buttons unresponsive
LCD failure, button contact wear, display driver chip failure — panels rarely stocked
How It Works
Our Discontinued Drive Repair Process
A systematic, schematic-driven repair process — from receipt to dispatch.
Identify & Document
Drive model, serial number, and nameplate data recorded. We confirm we have the schematic in our library before proceeding — covering 15,000+ documents including discontinued models.
Parameter Backup
Drive parameters read and backed up where possible before any repair. Even on drives with failed displays, we can often extract parameters via communication port.
Diagnosis with Vintage Schematics
Component-level diagnosis using original schematics for the specific drive family. Oscilloscope testing of gate drivers, DC bus, and control circuits against known reference values.
Source Obsolete Components
Failed components sourced from our obsolete inventory or specialist suppliers. For discontinued IGBT modules, we identify the nearest modern equivalent with matching specifications.
Repair & Preventive Upgrade
Component-level repair performed. Where applicable, proactive capacitor replacement recommended to prevent imminent failures — extending the drive's reliable service life.
Load Test & Warranty
Repaired drive tested at rated load. Parameters restored. 6-month warranty issued. Repair report includes components replaced and equivalent part numbers used.
Thorough Inspection
What We Inspect in Every Discontinued Drive
Every unit goes through a comprehensive inspection checklist before and after repair.
IGBT / SCR Power Stage
DC Bus Capacitors
Control Board
Gate Driver Circuit
Rectifier & Input
Operator Panel
The Synchronics Advantage
Why Choose Us for Discontinued & Obsolete Drive Repair
40+ Discontinued Drive Families
We have schematics, component knowledge, and repair experience for 40+ discontinued drive families — from Siemens Micromaster 3 to old Danfoss VLT 3000 to Eurotherm 590 DC drives.
Obsolete Component Inventory
Our specialist inventory includes vintage IGBT modules, discontinued gate driver ICs, obsolete microcontrollers, and legacy interface chips specifically held for discontinued drive repair.
Fraction of Retrofit Cost
Repairing a discontinued drive typically costs Rs 8,000–50,000. Retrofitting a modern replacement costs Rs 3–10 lakh including motor rewiring, PLC changes, and production downtime.
Troubleshooting
Common Discontinued Drive Faults We Fix
Seeing one of these error codes? We diagnose and repair the root cause.
Overcurrent fault on Siemens Micromaster 3
IGBT failure, gate driver fault, motor winding short
DC bus overvoltage on old ABB ACS series
Capacitor bank degradation, braking resistor open, decel too fast
DC bus undervoltage warning on Danfoss VLT 3000
Electrolytic capacitors dried out after 10–15 years in service
Control power supply fault on Allen Bradley 1336
Internal SMPS failure, control board power circuit fault
Overvoltage or undervoltage trip on Yaskawa E7/F7
DC bus capacitor ageing, rectifier degradation, input phase loss
Current limit or overload on Eurotherm 590 DC drive
SCR gate signal loss, current feedback scaling error, thyristor failure
Fault codes on discontinued drives vary widely by model year and firmware version. Send us the exact drive model and fault display text for a specific assessment.
Industries Served
Where Discontinued & Obsolete Drives Are Used
Textile Mills
Old Micromaster 3 ring frame drives, discontinued Lenze 8200 sizing drives
Plastics & Rubber
Old ACS300 extruder drives, discontinued VLT 4000 injection moulding drives
Paper & Printing
Old 1336 Force section drives, discontinued Unidrive Classic press drives
Food & Beverage
Old FX/G7 conveyor drives, discontinued Micromaster Vector mixer drives
Chemical & Pharma
Old ACS200 agitator drives, Eurotherm 590 reactor drives
HVAC & Utilities
Old VLT 6000 fan drives, discontinued Combimaster pump drives
Trusted Brands
Brands We Service
Component-level repair for all major manufacturers
FAQ
Frequently Asked Questions
Yes. The Micromaster 3 is one of the most common discontinued drives we repair. We carry schematics, common replacement IGBTs, and gate driver components specifically for the Micromaster 3 family.
Almost certainly. Undervoltage tripping on VLT 3000 series drives is typically caused by aged electrolytic capacitors in the DC bus. We replace the entire capacitor bank with modern equivalents and test fully before return.
No. Parameter backup is always the first step, performed before any repair work begins. Even if the drive display is dead, we can often extract parameters via the RS-485 or Profibus port using the original OEM software.
We maintain a stock of old IGBT modules and can source from specialist global suppliers. Where the original is truly unavailable, we identify modern equivalent IGBT modules with matching voltage, current, and package specifications.
Repair typically costs Rs 8,000–50,000 depending on drive size and fault. Retrofitting a modern drive involves the new drive cost (Rs 30,000–3,00,000+), motor cable changes, panel modifications, and PLC reprogramming — total often Rs 3–10 lakh. Repair saves 85–95% of this cost.
Discontinued Drive Repair Services Across India
Synchronics is India's specialist in repairing discontinued and obsolete AC drives, VFDs, and DC drives. While OEMs declare products "end of life", the machines built around those drives continue running India's factories — and when they fail, Synchronics repairs them. Our 32-year history means we were repairing Siemens Micromaster and old Danfoss VLT drives when they were still current products, giving us unmatched expertise in these obsolete platforms.
With pan-India courier logistics, a 6-month warranty on every repair, and a track record of 5,000+ discontinued drive repairs, Synchronics is the partner Indian industry trusts to keep legacy production lines running without the cost and disruption of a full drive retrofit.
Get Your Equipment
Back in Action — Fast
Send us your faulty industrial electronics. Our engineers will diagnose it and provide a detailed quote within 24 hours — with no obligation to proceed.
Free Evaluation
No obligation
48hr Turnaround
Fastest in India
6-Month Warranty
Every repair
No Fix, No Charge
Zero risk policy
Pan-India Pickup
Doorstep service