Railway & Metro Electronics Repair
Mission-critical traction converter, signaling board, and train control electronics repair for Indian Railways, metro rail systems, and rolling stock OEMs — from WAP-7 locomotive IGBT modules to Citadis metro door controllers.
A single traction converter failure grounds an entire trainset. Synchronics repairs IGBT traction modules, signaling interlocking boards, and train management system electronics at the component level — with the safety-critical rigour Indian Railways demands.
Railway and metro electronics operate under extreme conditions — constant vibration, wide temperature swings, voltage transients from catenary systems, and the unforgiving demand for safety-critical reliability. Synchronics has 32+ years of experience repairing the traction converters, signaling systems, train control electronics, and auxiliary power supplies that keep India's rail network moving. Our component-level repair capability covers all major OEMs including Siemens, ABB, Alstom, Bombardier, Medha Servo Drives, and BHEL — from mainline locomotive electronics to metro rail traction systems.
Diagnosis Guide
Common Railway & Metro Electronics Problems We Fix
Experiencing any of these symptoms? Our engineers have diagnosed and repaired thousands of these faults.
Traction IGBT Module Failure
Locomotive or EMU loses traction power, overcurrent trip, traction cutout alarm, reduced consist power
IGBT gate driver degradation, DC link capacitor ESR rise, thermal paste dryout, catenary voltage transient damage
Auxiliary Converter Shutdown
Coach lighting fails, HVAC stops, battery not charging, hotel load lost on entire coach or trainset
Output filter capacitor failure, IGBT switching fault, control board processor lockup, input fuse deterioration
Signaling Board Communication Loss
Interlocking fails to set route, signal stuck at danger, axle counter mismatch, section controller alarm
Optocoupler degradation, relay driver transistor failure, communication IC fault, power supply ripple on logic rail
TCMS Network Fault
MVB communication error, driver display blank, event recorder not logging, consist data lost between vehicles
MVB transformer coupler failure, Ethernet switch port fault, connector corrosion from vibration, firmware watchdog timeout
Door Controller Malfunction
Doors fail to open or close, door obstacle detection fault, platform interlock not clearing, train held at station
Motor drive MOSFET failure, encoder feedback loss, door controller PCB relay weld, edge sensor circuit open
Point Machine Drive Board Fault
Points fail to detect or lock, indication circuit error, point machine motor stall, signaling route blocked
H-bridge driver IC failure, current sensing resistor drift, detection relay coil open, power supply capacitor dry
How It Works
Our Railway Electronics Repair Process
A systematic, schematic-driven repair process — from receipt to dispatch.
Safety-Critical Intake
Railway electronics treated as safety-critical from receipt. Unit catalogued with full traceability — serial number, fleet number, vehicle position, and fault history recorded. ESD-safe handling throughout.
Environmental Cleaning & Inspection
Units cleaned of brake dust, carbon deposits, and moisture contamination typical of under-car and roof-mounted railway equipment. Visual inspection for heat damage, connector corrosion, and mechanical stress.
Component-Level Diagnosis
IGBT characterisation, gate driver signal integrity, DC bus capacitor ESR/capacitance testing, control board microprocessor and communication interface verification, and root-cause identification.
Precision Repair & Rebuild
Failed components replaced with genuine or equivalent-grade parts. IGBT modules re-bonded where applicable. Gate driver timing re-calibrated. All solder joints inspected under magnification for vibration-induced cracks.
Full-Load Functional Test
Repaired unit tested under simulated load conditions. Traction converters tested at rated current. Signaling boards verified against functional specification. Thermal imaging confirms no hotspots under sustained operation.
Documentation & Dispatch
6-month warranty certificate, detailed test report with waveform captures, and root-cause analysis report issued. Units packed in vibration-resistant packaging for safe transit to depot or workshop.
Thorough Inspection
What We Inspect in Every Railway Electronics Unit
Every unit goes through a comprehensive inspection checklist before and after repair.
IGBT / GTO Power Modules
DC Link & Filter Capacitors
Gate Driver Circuits
Control & Communication Boards
Signaling Electronics
Connectors & Mechanical
The Synchronics Advantage
Why Choose Us for Railway & Metro Electronics Repair
Traction Converter Specialists
IGBT and GTO traction converter repair is our core railway competency — covering Siemens SIBAS, ABB Bordline, Alstom AGATE, Bombardier MITRAC, Medha, and BHEL traction systems used across Indian Railways and metro networks.
Signaling-Grade Quality Standards
Railway signaling electronics demand the highest repair standards. Every signaling board repair includes full functional verification against original specifications, with detailed test documentation for depot audit trails.
Pan-India Railway Coverage
Logistics support to all major railway workshops, loco sheds, and metro depots — Mumbai, Delhi, Bengaluru, Chennai, Kolkata, Hyderabad, Pune, Lucknow, Varanasi, and Ahmedabad.
Troubleshooting
Common Railway Electronics Faults We Resolve
Seeing one of these error codes? We diagnose and repair the root cause.
Traction power lost on one or more motor blocks
IGBT module failure, gate driver fault, DC link overvoltage, traction control processor error
Auxiliary converter shutdown — coach power lost
Output IGBT failure, filter capacitor short, control board lockup, input overvoltage protection trip
Train bus communication failure between vehicles
MVB transformer coupler degradation, Ethernet switch fault, cable connector vibration damage
Signaling board entered fail-safe state — signal at danger
Redundancy check mismatch, relay driver failure, power supply out of tolerance, watchdog timeout
Door system preventing train dispatch
Door controller PCB fault, motor drive MOSFET failure, obstacle sensor circuit open, interlock relay weld
Point machine detection circuit error — route cannot be set
Detection relay coil open, H-bridge driver failure, current sensor drift, power supply capacitor aged
Railway electronics faults often interact with vehicle-level and infrastructure-level systems. Contact us with your board type, fault description, and fleet/vehicle details for expert assessment.
Industries Served
Where Railway & Metro Electronicss Are Used
Indian Railways (Mainline)
WAP-7, WAG-9 locomotive traction converters, LHB coach auxiliary power, signaling interlocking boards
Metro Rail Systems
Metro traction drives, platform screen door controllers, CBTC signaling electronics, station SCADA boards
High-Speed Rail
High-speed traction IGBT modules, ETCS signaling, train control management systems, pantograph control electronics
Freight Locomotives
WAG-12 IGBT traction converters, freight loco control electronics, dynamic braking resistor choppers, event recorders
Coaching Stock (LHB/ICF)
LHB coach auxiliary converters, end-of-train telemetry, coach monitoring system boards, HVAC inverter drives
Depot & Workshop Equipment
Wheel lathe drives, under-floor wheel profiling electronics, washing plant VFDs, depot crane drives, test bench controllers
Trusted Brands
Brands We Service
Component-level repair for all major manufacturers
FAQ
Frequently Asked Questions
Yes. IGBT traction converter repair for WAP-7, WAG-9, and WAG-12 locomotives is one of our core capabilities. We perform gate driver rebuild, IGBT module replacement, DC link capacitor testing, and full-load functional verification. We work with modules from Siemens, ABB, Medha Servo Drives, and BHEL traction systems.
Yes. We repair electronic interlocking boards, axle counter modules, track circuit transmitter/receiver cards, and point machine controller boards at the component level. Every signaling board repair undergoes full functional verification against original specifications, with detailed test documentation suitable for depot audit requirements.
We support metro rail electronics across all major Indian metro networks — Delhi Metro, Mumbai Metro, Bengaluru Metro (Namma Metro), Chennai Metro, Kolkata Metro, Hyderabad Metro, and others. Our repairs cover traction drives, door controllers, HVAC drives, platform screen door electronics, and CBTC signaling boards from Siemens, Alstom, and Bombardier platforms.
Railway electronics repairs follow our most rigorous quality protocol. Full traceability from intake to dispatch, ESD-safe handling, component-level diagnosis with calibrated instruments, functional testing against OEM specifications, thermal imaging under load, and comprehensive test reports with waveform documentation. Every unit carries a 6-month warranty.
Yes. We have established logistics to all major railway workshops, loco sheds, and metro depots across India including facilities in Mumbai, Delhi, Bengaluru, Chennai, Kolkata, Hyderabad, Pune, Lucknow, Varanasi, and Ahmedabad. We arrange secure, vibration-resistant packaging for safe transit of sensitive railway electronics.
Railway & Metro Electronics Repair Across India
Synchronics provides expert electronics repair for India's railway and metro rail sector — from mainline locomotive traction converters to metro signaling systems. With 32+ years of industrial electronics experience and deep expertise in IGBT/GTO power electronics, we are trusted by railway workshops, loco sheds, and metro depots for component-level repair of traction converters, auxiliary power supplies, train control systems, and wayside signaling electronics.
We serve railway facilities across India's major cities: Mumbai, Delhi, Bengaluru, Chennai, Kolkata, Hyderabad, Pune, Lucknow, Varanasi, and Ahmedabad. Our repairs cover all major traction OEMs — Siemens SIBAS controllers, ABB Bordline converters, Alstom AGATE traction systems, Bombardier MITRAC converters, Medha Servo Drives locomotive electronics, and BHEL traction motor drives. Every repaired unit carries a 6-month warranty and comprehensive test documentation.
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