HP 9895A 8'' Floppy Drive - Problem

[Hans Brueggemann]

michael, before you jump into fault isolation on individual components, i strongly suggest to replace all (and i mean all, no matter how unsuspicious they look) electrolytic and tantalum capacitors with fresh (as in fresh eggs, not NOS) ones from your preferred catalog distri, and have a close look at all power supply rails before commencing any further repair attempts.