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Expert Services

Industrial PCB Repair Services

Component-level circuit board diagnostics, micro-soldering, and trace restoration.

Service Overview

Industrial printed circuit boards (PCBs) are designed to withstand vibration and heat, but voltage surges, corrosion, and aging components still cause failures. Standard repair shops lack the equipment to work on multi-layer PCBs with internal power planes. Usha Engineering Services utilizes advanced signature analyzers, thermal cameras, and micro-soldering stations. We trace circuit failures to the specific faulty capacitor, logic gate, or IC, saving the board from scrap.

Supported Hardware Series & Models:

Fanuc CNC Boards

Siemens System Boards

Heidenhain Scale Interfaces

Indramat Control Cards

Kuka Robot Boards

Yaskawa Driver PCBs

Custom Machine Controller Boards

Common Failure Modes & Diagnostic Codes

Technical Reference Sheet for Engineers

Code / Symptom	Probable Cause	Engineering Remedy
Burnt / Lifted Trace Lines	Short circuits drawing excess current through thin copper lines, overheating them	Clean charred fiberglass substrate, run jumper wires using enamel copper wire, and seal with UV-curable solder mask.
Component Failure (Short Circuit)	Voltage spikes blowing decoupling ceramic capacitors or destroying logic gates	Locate hot spots using thermal imaging cameras under low voltage, desolder shorted components, and replace.
Intermittent System Resets	Dry solder joints on BGA or QFP chips due to thermal cycling and machine vibration	Reflow solder joints using hot-air rework stations with flux, or reball larger ICs if connection pads are oxidized.
Corrosion & Oxidation	Exposure to moisture, chemical fumes, or leaking alkaline batteries on the board	Ultrasonic chemical bath cleaning, mechanical scraping of oxidation, repair affected traces, and apply conformal coating.

Our Premium 6-Step Component-Level Repair Process

How we restore electronic components to manufacturer specifications

Incoming Visual & Thermal Inspection

Every unit is registered and subjected to high-definition visual inspection and thermal scanning. We identify blown trace lines, scorched resistors, swollen capacitors, and signs of liquid ingress before applying any power.

In-Circuit Analog Signature Analysis

Using advanced Tracker/Signature Analyzers (such as Huntron Trackers), we test passive components (resistors, diodes, capacitors, inductors) and active ICs while in-circuit. This safe, power-off testing compares component electrical signatures against known-good standards.

Semiconductor Power-Stage Diagnostics

For VFDs and servo drives, we test the high-power rectifier and IGBT inverter stages. We check the gate-drive circuit paths, desaturation protections, and replace gate optocouplers to prevent catastrophic future failures.

Microscopic Solder & SMT Reflow

Using ISO-certified temperature-controlled desoldering stations, our IPC-trained technicians replace damaged components. We execute precision micro-soldering under stereo-zoom microscopes for multi-layer PCBs.

Controlled Bench & Load testing

After repair, units are powered on via variable-voltage current-limiting power supplies. We run full closed-loop tests under real load conditions—testing communication links, analog/digital feedback loops, and thermal efficiency.

Final QC Certification & Protective Coating

The repaired PCB is cleaned in an ultrasonic chemical bath to remove flux residues. We apply a high-grade conformal coating to protect against moisture, dust, and corrosive industrial oils before releasing the unit with our warranty.

ISO 9001:2015 Certified

Why Choose Usha Engineering?

26+ Years of B2B Expertise

Established in 2000, we possess over a quarter-century of hands-on industrial electronic repair experience. We are an ISO 9001:2015 Quality Management System certified company.

Up to 70% Cost Savings

Repairing high-end industrial controllers and drives with Usha Engineering is significantly more cost-effective than purchasing expensive new OEM replacement units, which also require configuration.

Advanced Component-Level Lab

Our Panchkula HQ facility features state-of-the-art diagnostic equipment including logical analyzers, digital oscilloscopes, curve tracers, thermal imagers, and dedicated load test benches.

Pan-India Logistics & Quick Turnaround

We accept units shipped via secure courier from anywhere in India, offering express 48-hour turnarounds for critical breakdowns to minimize factory downtime.

Industries We Serve

Steel & Metallurgy

VFDs and PLCs controlling blast furnace loaders, rolling mills, heavy crane lifts, and cooling fans.

Textile & Spinning Mills

High-speed servo drives, HMI panels, and control cards on spinning frames, carding machines, and weaving looms.

Paper & Packaging

Multi-drive tension control systems, synchronous motors, and PLC controllers on web presses and slitting lines.

Pharmaceutical & Chemical

HMIs, PCBs, and control modules in pill press machines, packaging lanes, centrifuge drives, and mixing vessels.

CNC & Automotive Machining

Precision spindle drives, servo controllers, and logic units in 3-axis and 5-axis CNC machining centers.

Warranty Protection

3-Month Service Warranty

We stand behind our work. All board-level repairs performed by Usha Engineering Services are covered by a comprehensive 6-month warranty on replaced components and workmanship. We use only original, high-grade semiconductor parts sourced from certified global distributors.

Need Help Immediately?

Submit a diagnostics ticket or speak directly with an engineer to get a free estimate and arrange unit pickup.

Frequently Asked Questions

Clear answers regarding repair procedures, pricing, and warranties

What is component-level repair?

It means diagnosing the individual failed components (resistors, ICs, transistors, capacitors) on the circuit board and replacing them, rather than throwing away the entire expensive board.

Can you repair 4-layer or 6-layer PCBs?

Yes, our technicians are trained in multi-layer board repair. We trace internal layers using schematic diagrams, signal generators, and digital oscilloscopes.

How do you test custom PCBs without the machine?

We build custom test jigs and inject voltage signals to check output waveforms, verifying that the board's logic gates and regulators are working correctly.

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