DacMagic problem

[soerboe]

Hi!

I got a fairly new DacMagic for free, the only problem is that it's a bit moody. It only works 1 in 30 times. When I power it on it takes the normal few seconds before I hear the usual clicks. Almost every time the LEDs doesn't come on, and I get no sound. But 1 in 30 times the LEDs do come on and the DAC functions perfectly. Does anyone know what might be wrong, and how it can be fixed?

I've already opened it and done a thorough visual inspection, but found nothing obvious to repair.

Thanks,
Chris

 

[gtx580m]

Hi!

I got a fairly new DacMagic for free, the only problem is that it's a bit moody. It only works 1 in 30 times. When I power it on it takes the normal few seconds before I hear the usual clicks. Almost every time the LEDs doesn't come on, and I get no sound. But 1 in 30 times the LEDs do come on and the DAC functions perfectly. Does anyone know what might be wrong, and how it can be fixed?

I've already opened it and done a thorough visual inspection, but found nothing obvious to repair.

Thanks,
Chris

We're talking about the latest Azur DacMagic, right? It could be a power supply failure. I had sort of a similar problem - the DAC would reboot as soon as a signal appeared on the digital input; replacing the 12V AC wall-wart fixed it. I assume it had something to with the failing transformer not coping with the load.
Now the thing is, AC power supplies aren't as common as the DC ones, so finding a replacement could be a hassle. What I did was find a non-functioning 12V DC supply, disassemble it and throw out the rectifier. Unfortunately, the transformer outputs 14.5 volts instead of 12, so it's only a temporary solution until the proper replacement supply arrives in the mail.

 

[soerboe]

We're talking about the latest Azur DacMagic, right? It could be a power supply failure. I had sort of a similar problem - the DAC would reboot as soon as a signal appeared on the digital input; replacing the 12V AC wall-wart fixed it. I assume it had something to with the failing transformer not coping with the load.
Now the thing is, AC power supplies aren't as common as the DC ones, so finding a replacement could be a hassle. What I did was find a non-functioning 12V DC supply, disassemble it and throw out the rectifier. Unfortunately, the transformer outputs 14.5 volts instead of 12, so it's only a temporary solution until the proper replacement supply arrives in the mail.

It's the latest Azur DM. I can easily test with another power supply, so we'll see if that helps. Thanks!

 

[soerboe]

Tried with another power supply, without any luck. I think and hope its a simple fix, but without a service manual my knowledge of circuit design only takes me so far. If anyone has a service manual and/or a more tips, it would be greatly appreciated. I need to get it up and running before I can do tweaks on the analog output stage.

Thanks,
Chris

 

[gtx580m]

Tried with another power supply, without any luck. I think and hope its a simple fix, but without a service manual my knowledge of circuit design only takes me so far. If anyone has a service manual and/or a more tips, it would be greatly appreciated. I need to get it up and running before I can do tweaks on the analog output stage.

Thanks,
Chris

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