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General Mach Discussion / Re: Hi, Where can i get the wiring diagram to the board of a CNC 3040?
« on: March 26, 2014, 03:07:44 AM »
There are many possibilities ;
If either R3 or R4 had expired then too much current would flow in the opto isolator circuit. Likewise if the capacitor C9 was faulty there would be similar consequences. There is always the possibility that the opto isolator EL817 is at fault but then – that’s the joy’s of fault-finding.
Tweakie.
If either R3 or R4 had expired then too much current would flow in the opto isolator circuit. Likewise if the capacitor C9 was faulty there would be similar consequences. There is always the possibility that the opto isolator EL817 is at fault but then – that’s the joy’s of fault-finding.

Tweakie.