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

Brent Hilpert hilpert at
Fri Mar 20 02:22:57 CDT 2015

On 2015-Mar-19, at 4:00 PM, Enrico Lazzerini wrote:
> I desoldered Q101 and i reconnect the 12v zener D102 and the resistor R112
> and I measured those voltages on 358:
> 1=6,32v
> 2=6,37v
> 3=6,36v
> 4=0v
> 5=0,74v
> 6=1,752v
> 7=11,49v
> 8=12,7v
> Have I to resolder just the q101 now?

It looks like the 358 is faulty, but you should try pulling pin 5 high/low while watching pin 7 again - see last part of my previous message. Also the bit about pulling the 9142 pin 11 to pin 1.

More information about the cctalk mailing list