Siemens SCALANCE X-300 and XR-300 repair and refurbishment.
PSU repair and board-level diagnostics for Siemens SCALANCE X-300 rackmount switches. Engineer-led, no fix no fee.
SCALANCE X-300 / XR-300 repair and refurbishment
The Siemens SCALANCE X-300 and XR-300 are managed Layer 2 switches available as compact DIN-rail units or 19-inch rackmount devices. They serve as backbone switches in UK plant networks, handling inter-cell traffic and connecting machine-level networks to the plant-wide infrastructure. With configurations up to 28 ports and support for Gigabit uplinks, these are high-value network components where unplanned failure can disrupt entire production lines.
Common SCALANCE X-300 / XR-300 faults we fix
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Power supply electrolytic capacitor degradation — particularly on units in continuous 24/7 operation — causing intermittent restarts or failure to power on
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SFP module slot failure preventing fiber uplink connectivity to the plant backbone
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Individual port failure from ESD damage or PHY chip faults
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PROFINET communication faults caused by internal timing issues, disrupting real-time data exchange with connected controllers
How it works
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1
Send details
Share the switch model, fault symptoms, and any alarm LEDs or diagnostic output.
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2
Diagnostics
Bench diagnostics isolate the fault to board, component, or subsystem.
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3
Repair, Refurbish & Test
Component-level repair with port validation and management system testing before return.
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4
Return to service
Confirmed test results and return logistics for your switch.
Why Electron Lab
- Engineer-led bench diagnostics
- Component-level repair and rework
- Tested Before Return
- Clear, fast quoting
SCALANCE X-300 / XR-300 repair FAQs
My X-300 has intermittent PROFINET communication faults — is this repairable?
Yes. Intermittent PROFINET faults can be caused by internal timing or PHY chip issues. We carry out board-level diagnostics to identify and repair the root cause.
Do you repair both compact and rackmount SCALANCE X-300 variants?
Yes. We service both the compact DIN-rail X-300 and the 19-inch rackmount XR-300 variants.
My SCALANCE X-300 will not power on — can you repair it?
Yes. Complete failure to power on is typically caused by capacitor degradation in the power supply section. We carry out component-level repair on the power circuitry.