Description
Keysight 6811C AC Power Source Repair
The Keysight 6811C AC Power Source is a programmable power supply – it holds a commanded voltage or current under whatever load the device under test presents, and switches between constant-voltage and constant-current regulation as that load changes. The output stage does the work, and it is where the heat and the wear concentrate.
June Company’s certified technicians repair the Keysight 6811C AC Power Source for test engineers, production test departments, R&D laboratories, and equipment manufacturers. Every instrument is repaired at component level and verified against reference standards before it ships back, with the measured results documented.
Common Keysight 6811C AC Power Source problems we fix
- Current limit not holding at the set value.
- Output relay not switching.
- Cooling fan or thermal shutdown.
- Internal power supply faults.
- GPIB, LAN, USB or remote-control faults – which breaks automated test sequences while the instrument still works from the front panel.
- Display, keypad or front-panel faults.
- Output voltage or current out of tolerance under load – a supply can read correct on its own display while delivering something else to the load – readback and actual output are separate circuits and they drift separately.
- Will not regulate, or oscillates between CV and CC.
- Excessive ripple or noise on the output – invisible on the front panel and capable of corrupting whatever is being powered.
- Output stage or pass-element failure.
FAQs
The display shows the right voltage but my circuit sees something else. How? Readback and actual output are separate circuits. A supply can report correctly while delivering incorrectly, which is why we verify the output under load rather than trusting the panel.
Output is unstable under a changing load. Repairable? Yes. That usually points at the regulation loop or the CV/CC crossover rather than the output devices themselves.
Every repair carries a 90-day parts-and-labor warranty, with a firm quote before any work begins. Email us or submit a service request.







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