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

[Enrico Lazzerini]

I have a couple of 8" drives Mitsubishi M2863 slim type that I recovered I
think around on 1990 both in excellent conditions with which I created
images and written several floppy disks 8". For some reason, including my
incompetence, both their spindle motor do not run any more. And powering
correctly with only +24Vdc the circuit part of the engine rotation control
of the disk (called spindle motor) begins to smoke near a chip LB1620. The
schematic contained in the maintenance manual of the drive includes
components of other different model of spindle motor circuit. If that were
possible, how could I to be able to run the drives correctly: reusing partly
engine or even replacing it with analogous maybe even creating handcrafted a
motor with pieces of recovery and manage the number of RPM (I think 360rpm
for 8" drive) possibly with special circuit ?

At this moment there is a shortcircuit between +24vdc pin and ground pin.

Pics
https://www.dropbox.com/sh/p12w71v69tjgfz7/AAAIReql4Se5ZCkLClPoAVOPa?dl=0 

references
M2896-63_Maintenance_Manual
https://www.dropbox.com/s/8rhukkr1xf78m8c/M2896-63_Maintenance_Manual.pdf?dl
=0 
M2896-63_Half-Height_Drive_Brochure
https://www.dropbox.com/s/elmj3nwz59dz2eo/M2896-63_Half-Height_Drive_Brochur
e.pdf?dl=0 

Spindle motor SRC SHINANO TOKKI CORP. MADE IN JAPAN 702V
Modello DLF-3ME DC24V

Any suggestion is welcome.

Enrico