File:Mitsubishi MF355C 3.5 inch Diskette Drive Specifications (UGD-0527A, Feb 1987).pdf
Mitsubishi Electric, 3.5 inch Flexible Disk Drive Standard Specifications, MF355C, document UGD-0527A, February 1987.
Manufacturer specification for the Mitsubishi MF355C 1.44 MB 3.5-inch diskette drive, a drive family fitted to several IBM PS/2 machines. Covers the interface signals, DC power requirements, recording specification and the drive mechanism.
Of note for restorers: section 3 states that the disk rotation mechanism uses a DC brushless direct-drive motor coupled straight to the spindle at 300 rpm. The MF355C has no drive belt.
Source: bitsavers.org, /pdf/mitsubishi/floppy/MF355/UGD-0527A_MF355C_Specifications_Feb87.pdf.
Licence: Mitsubishi Electric manufacturer documentation, out of print. Hosted here for preservation and non-commercial repair reference; no claim of copyright is made by this wiki.
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