ady
Junior Member
Posts: 45 
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Post by ady on Feb 25, 2017 5:04:51 GMT -5
Hello everyone.
I have one M1 620 and the fuse blew.
I have changed all the parts like here
And the fuse still blow.
Any ideea were to lock?
Thanks!
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ady
Junior Member
Posts: 45
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Post by ady on Feb 25, 2017 6:05:12 GMT -5
I have one working.
I mesured some components and have the same value (on pcb)
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Post by mastertech on Feb 25, 2017 11:45:14 GMT -5
Which fuse, F1 in the power supply?
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ady
Junior Member
Posts: 45
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Post by ady on Feb 27, 2017 7:06:13 GMT -5
Yes F1. FETs are ok, and so is the rectifier bridge. I changed the diods D1..D4.
i suspect U1 but on the schematics from the internet the PMW comtroler is UC3844N but on the board i have UC3842N.
The power supply it`s identical for the Alesis M1 MK1,MK2 and M1620 (Alesis M1 MK3), only the U1.
With what to change the U1?
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ady
Junior Member
Posts: 45
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Post by ady on Mar 7, 2017 13:41:13 GMT -5
I changed the U1 with UC3844N and it`s working!
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