Zähl HM1 - Reference Headphone Amplifier
Apr 18, 2024 at 4:29 AM Post #1,473 of 1,480
Sorry chap. You're not qualified to make an armchair diagnosis on this.

Maybe this is similar to an issue you've heard about? Could be. But your achilles heel is clearly your inexperience and lack of internal self control.
He made a suggestion of what might be at fault. What's with the ad hominem response to someone who goes out of their way to help and advise in the community?
 
Apr 18, 2024 at 5:12 AM Post #1,474 of 1,480
I should receive my fixed HM1 tomorrow. Haven't been told what the issue was yet, but I guess it was not a complicated one, as they just took one day to fix it.
 
Apr 19, 2024 at 9:09 AM Post #1,475 of 1,480
My HM1 is back to home. Didn’t have time to listen to it yet but could verify that the relay is clicking again, thus all should be fine.
 
Apr 19, 2024 at 9:11 AM Post #1,476 of 1,480
My HM1 is back to home. Didn’t have time to listen to it yet but could verify that the relay is clicking again, thus all should be fine.
Any chance you could ask what the issue was? Curious whether it was what I was thinking or not
 
Apr 19, 2024 at 9:13 AM Post #1,477 of 1,480
Any chance you could ask what the issue was? Curious whether it was what I was thinking or not
I asked, I was told that Michael is going to contact me directly to tell me what it was.
They received it last Monday and they shipped it back the day after, thus that must not have been something overly complicated.
 
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Apr 19, 2024 at 9:56 AM Post #1,478 of 1,480
Alright, here's the answer

The comparator for the switch-off on channel A was faulty and produced a wrong logic signal. Very clear fault, so easy to find and repair. All connectors were fine. A very rare mistake.

Was something else then. :)
 
Apr 19, 2024 at 9:57 AM Post #1,479 of 1,480
Alright, here's the answer

The comparator for the switch-off on channel A was faulty and produced a wrong logic signal. Very clear fault, so easy to find and repair. All connectors were fine.

Was something else then. :)
Good to see it was fixed quickly!
 
Apr 19, 2024 at 11:40 AM Post #1,480 of 1,480
Great support I must say. I was provided a new package for secure shipping (I didn’t have mine anymore) and everything went fast and smoothly.
 

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