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

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