Author Topic: Neutrik A1  (Read 4146 times)

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Offline crazynetworkTopic starter

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Neutrik A1
« on: November 30, 2023, 08:39:47 am »
Hi all. When the device is short-circuited to itself, it shows a very large THD+N value at 1kH. If you increase the frequency to 3kH, the THD+N value becomes 0.006. What could be the reason? I also ask you to send the service manual to crazynetwork.km@gmail.com. Thank you!

 

Offline BreakingOhmsLaw

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Re: Neutrik A1
« Reply #1 on: November 30, 2023, 08:36:55 pm »
Hi, you can monitor the error signal (so basically just the distortion part) on the monitor outputs using an oscilloscope. That should give you a clue to what is wrong. Post results.

That said, this thing has a linear power supply that has a design flaw. The electrolytic capacitors are right next to a big heat sink and prone to dry out. I would advise you to use a scope to check if there is 100Hz ripple on the power rails. Since these devices date back to the 90s, I wouldn't be surprised if those caps are dry.
 

Offline srb1954

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Re: Neutrik A1
« Reply #2 on: December 01, 2023, 05:59:37 am »
Try switching the 400Hz HPF while measuring the 1KHz distortion.

If this results in a drop in the measured distortion level it could indicate that the O/P signal from the generator is contaminated by ripple on the PSU rails.
 

Offline crazynetworkTopic starter

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Re: Neutrik A1
« Reply #3 on: December 01, 2023, 08:32:06 am »
When 400Hz HPF is turned on, the noise decreases but not significantly.

 

Offline crazynetworkTopic starter

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Re: Neutrik A1
« Reply #4 on: December 04, 2023, 08:18:19 am »
Help with a service manual if anyone can!
 

Offline crazynetworkTopic starter

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Re: Neutrik A1
« Reply #5 on: December 18, 2023, 08:23:18 am »
HELP pls!
 

Offline crazynetworkTopic starter

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Re: Neutrik A1
« Reply #6 on: February 14, 2024, 12:59:50 pm »
Hi all. Kind people sent me a service manual for the A2 model. But still I need it from the A1 model. Please share the service manual or diagram from Neutrik A1. Thank you.

crazynetwork.km@gmail.com
 

Offline Martin72

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Re: Neutrik A1
« Reply #7 on: December 02, 2024, 07:51:46 pm »
Hello,

I only just saw this thread.
Here is the service and calibration manual for the A1 model:
https://drive.google.com/drive/folders/1hIuFYlEY7q9-1mc1uUQt99fMPT4ylPkJ?usp=sharing

The software for the A1 is also included.
(Should work with  DOS box)
 
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Offline crazynetworkTopic starter

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Re: Neutrik A1
« Reply #8 on: December 04, 2024, 10:29:51 am »
Thanks a lot! You are the best!
 

Offline schenkmi72

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Re: Neutrik A1
« Reply #9 on: December 08, 2024, 05:29:38 pm »
Hi folks,
someone willing to share the Neutrik A2 service manual with me ? Many thanks in advance
 

Offline 707dave

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Re: Neutrik A1
« Reply #10 on: December 20, 2024, 09:38:15 am »
Hi
Is it possible to make the Neutrik A1 service manual available again , as the link isn’t working?
Cheers D
 

Offline Martin72

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Offline 707dave

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Re: Neutrik A1
« Reply #12 on: January 01, 2025, 09:52:51 am »
Thankyou very much, that's wonderful to get.

Best wishes
D
 


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