Hello Everyone,
I have a Bruker Avance III 400 MHz solid-state system circa 2010
(Cento5.11, Topspin 3.6.2), which developed over time a communication
problem between the SGUs and the amplifiers. The CF proceeds seemingly
without any problem, only to end up with an error message ‘No
connection between SGUs and amplifiers found! Acquisition will not
be possible. The wiring may be incorrect, or the emergency stop
signal may be active. Please check the hardware and do ‘cf’ again.’
No visible problems with the hardware; all LEDs in front and back are
green, no warning/flashing lights, and no connections have changed since
the instrument was functioning. The ‘ha’ reveals no obvious
problems either.
Last year, Bruker responded to the problem by replacing all the fans and
filters in AQS/3, as well as the amplifiers. That resulted in about two
months of stable work, but apparently didn’t solve the root problem. Now
the instrument is back to the state of ‘No connection between SGUs and
amplifiers…’ Numerous reboots didn’t move the problem.
I would be very grateful to hear all your suggestions for resolving the issue.
Thank you and best regards,
Igor
--
Igor Moudrakovski, PhD
Max-Planck Institute for Solid State Research
Heisenbergstr. 1, 70569 Stuttgart, Germany
Office 711-689-1963
400 NMR 711-689-1410
600 NMR 711-689-1054
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Received on Mon Jan 26 2026 - 08:08:53 MST