How to save two Mitsubishi M2896 drive (spindle motor smoked!)

Chuck Guzis cclist at
Sun Mar 1 13:46:41 CST 2015

On 03/01/2015 11:13 AM, tony duell wrote:

> Yes, if you replace the LB1620 then the new one might fail too. But you'll not get it working
> without trying things.

My suggestion to Enrico was to pull the driver transistors that switch 
between the +24 and the motor windings.  If his case is usual there are 
three of these (often Darlingtons).   If the board still smokes when 
power is applied, you know that the fault does not lie in the motor nor 
in the driver transistors.

I received no response, FWIW.


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