Servo Amplifier Repair · Semiconductor Equipment
Power-stage faults, repeated trips or missing feedback can stop a motion axis. GK-SEMI repairs servo-drive electronics and helps source compatible amplifiers for older equipment.
Symptoms & Repair Scope
An amplifier problem can stop wafer handling, probe positioning, or automated motion. These are the symptoms worth bringing to a repair discussion—and the specific components we address.
No display or "Ready" status leaves the drive completely unavailable, halting the axis immediately.
Overcurrent, overvoltage, or communication alarms interrupt production cycles and cannot be solved by resetting.
The drive powers up, but the axis refuses to enable or position correctly due to signal loss.
If the alarm remains after a drive swap, check parameter compatibility, feedback, wiring and motor condition before replacing more parts.
The Commercial Decision
Compare power-stage repair, parameter handling and return checks before choosing a drive route.
OEM replacement or exchange may be available for the supported drive model.
A substitute drive may need firmware and axis-parameter checks.
Replacement pricing and availability depend on the exact model and supplier.
Repair depth and configuration handling depend on the shop's test access and documented procedure.
Available functional checks vary by provider and the drive's accessible interfaces.
Ask what drive functions were verified and how parameter data was handled.
Targeted repair of serviceable power-stage, sensing and control circuits.
Return checks cover accessible repaired circuits; loaded motion is verified on a compatible setup or machine.
Configuration and parameter dependencies are reviewed before affected control circuits are serviced.
Return checks address the repaired power, current-sense or feedback function.
Check the repaired DC-bus, supply and protective circuit functions accessible on the bench.
Check current-sense and relevant control responses with the compatible interface.
Machine-side loaded motion and parameter validation remain separate from bench electrical checks.
A semiconductor handler reported repeated overcurrent alarms. A complete drive replacement was being considered.
Circuit-level inspection found no evidence of a power-stage failure within the checks carried out. The root cause was an aged shunt resistor on the current detection circuit, causing false triggers.
The damaged current-sense resistor was replaced, followed by checks of the detection circuit and the relevant drive response. The original drive and its configuration were retained; machine-side operation was assessed after return.
Buyer Questions
Clear answers for maintenance and purchasing teams evaluating the repair path.
We assess power-stage devices, DC-bus components, driver circuitry and related electronic failures. The repair work depends on the damaged parts and board condition.
Yes. Current-sense components or their supporting circuitry can produce a misleading overload report even when the power stage is not the source of the fault.
Our repair checks focus on the affected electronic functions. Where matched motor or load testing is available, the suitable test scope is agreed; final operation is confirmed in the installed machine.
We assess parameter memory and configuration implications before work on programmable parts. Any required backup or restoration depends on access to the original unit and records.
Component-level repair may retain the installed hardware version, interfaces and machine configuration while avoiding the integration work of a different drive.
We investigate repairable boards and hard-to-find replacement units using our electronics repair and sourcing resources.
The motor, encoder, harness and enable signals may also be involved. Our related motion repair support helps narrow the next step rather than repeating drive replacement.
Exchange or temporary replacement support depends on matching inventory and mutual agreement. Availability is checked against the drive part number and machine requirements.
KEEP THE AXIS MOVING
From a dead amplifier to a hard-to-find replacement, start with the drive you have. Talk to our team about an electronic repair path and the next step for your semiconductor equipment.
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