RVEN music instruments: Yamaha SY99


Overview

  1. Procedure (how to) overview
  2. Internal battery
  3. Memory
  4. Floppy Disk Drive (FDD)

Internal battery


Memory


Floppy Disk Drive (FDD)

Summary

Any attempt to read from, write to or format a floppy disk from the SY99 failed. The led on the SY99 FDD is on but no other action occurs and a power cycle is neede to the the SY99 responsive again.
An investigation showed that the problem is related to the drive. The tension of the drive belt is too low.
Although drive belts or refurbished disk drives are still available these all have the disadvantage that the materials used are roughly 25+ years old, and thus have an expected short remaining life span.

Investigation report

Solution

Evaluation of solution alternatives
Alternative Availability Expected remaining life span
Repair the original FDD Replacement drive belts are available (at about $13.00 excluding shipping, at the time of writing: august 2015) Short (actual age and expected life span of the replacement belt unknown)
Replace the original FDD with a compatible FDD Replacement drives (refurbished NEC / TEAC) are available (at about $60.00 excluding shipping, at the time of writing: august 2015) Short (actual age and expected life span of the refurbished unit unknown)
Replace the original FDD by an FDD emulator FDD emulators are available ranging from €50.00 to 750.00 (at the time of writing: august 2015) Because of this transferring files from the original floppies to the FDD emulator is not a trivial task. Long (No mechanical parts)
Use MIDI system exclusive as an alternative None. Dedicated software needs to be developed. Not applicable

I decided to go for the affordible, although possibly short term, solution first by replacing the drive belt.
At some later date, when budget and available time allow it, I'll replace the original FDD by an affordable FDD emulator. The SY99 deserves it!

Work done

Drive belt replacement

Replacing original drive by a FDD emulator

Testing

Resources