Date: Tue, 27 Jan 2026 16:57:12 +0100
Hi,
Ah, no...I didn't look down. Thanks for pointing out. Here is the picture.
Does it look like it has any problem?
Regards,
Igor
On 27/01/2026 12:43, Philipp Hegemann via groups.io wrote:
>
> Hi,
>
> did you also check the LEDs deeper? From the BSMS? They are almost on
> the ground (also on the back side).
>
> Philipp
>
> *Von:* main_at_ammrl.groups.io <main_at_ammrl.groups.io> *Im Auftrag von
> *Igor Moudrakovski
> *Gesendet:* Dienstag, 27. Januar 2026 10:52
> *An:* main_at_ammrl.groups.io
> *Betreff:* Re: [AMMRL] Bruker Avance III : No communication between the SGUs and Amplifiers
>
> Hi,
>
> I am not sure which fuse would be in question? Here is a photo of the
> AQS/3 back. The fuses in the upper right corner are good.
>
> Regards,
>
> Igor
>
> On 26/01/2026 17:39, Philipp Hegemann via groups.io wrote:
>
> Hallo,
>
> Is it possible that a fuse is broken? Check on the back side if
> there is a LED not on. They are easily overseen…
>
> Greetings
>
> Philipp
>
>
>
> Am 26.01.2026 um 17:09 schrieb Igor Moudrakovski
> <I.Moudrakovski_at_fkf.mpg.de> <mailto:I.Moudrakovski_at_fkf.mpg.de>:
>
> 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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(image/jpeg attachment: BSMS_2_Back.jpeg)