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shirreff Full Member
Joined: 05 Sep 2009 Posts: 149 Location: Northumberland UK
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Posted: Wed Jun 21, 2017 10:13 pm Post subject: Korg M1 motherboard fault, no sound. |
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Hi,
I've got 2 M1's. One fully working the other not producing sound so I swapped parts and narrowed it down to the mother board sadly.
Does any one have any ideas on what might be the problem? _________________ Korg I3, Korg M1, Korg Tr Rack. Korg x3, Cakewalk Sonar. |
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Mellontikos Junior Member
Joined: 01 Feb 2012 Posts: 96
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Posted: Wed Jun 28, 2017 3:47 am Post subject: Re: Korg M1 motherboard fault, no sound. |
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shirreff wrote: | Hi,
I've got 2 M1's. One fully working the other not producing sound so I swapped parts and narrowed it down to the mother board sadly.
Does any one have any ideas on what might be the problem? |
Those old boards are known for faulty filter caps on the analog side of the DAC.
Could be the DAC, could be the OP Amps, or it's filter caps, or both. You might not be able to see physical damage.
Not producing sound at all could be caps completely toast, either leaking or dry. Got pics of the insides? _________________ Tyros 4. 01/Wpro. N5ex. SY99, Legacy M1, WS & Triton VST's. Wavestate Native VST |
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shirreff Full Member
Joined: 05 Sep 2009 Posts: 149 Location: Northumberland UK
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Posted: Wed Jun 28, 2017 4:28 am Post subject: |
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Hi,
Not got any pics at the moment but I cannot see any damage. I've had a good look. I'll send some pics asap. _________________ Korg I3, Korg M1, Korg Tr Rack. Korg x3, Cakewalk Sonar. |
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shirreff Full Member
Joined: 05 Sep 2009 Posts: 149 Location: Northumberland UK
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voip Platinum Member
Joined: 27 Nov 2014 Posts: 3758
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Posted: Wed Jun 28, 2017 7:42 pm Post subject: |
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Looking at the pics, there's nothing that really stands out as a potential problem, apart from in IMAG0184.jpg, near the top of the image, IC36 has what looks like possibly a piece of fine wire amongst its pins, which would cause problems, although it's more likely to be be a fabric fibre catching the light.
Is it possible the backup battery has been changed but the factory data not restored?
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