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2031 HP
UPGRADE NOTES

A design error was present in the original 2031 High Profile Single Disk Drive. The write circuit was modified to correct the problem, however, it is possible that some units still need to be revised.

Revision to correct write circuit:

  1. Lift diodes, CR13 & CR15 as shown.
  2. Install Transistors, solder the Collector Lead to Diodes.
  3. Solder the Center Leads of Transistors together, to R40 Resistor as shown. (Use 20 AWG wire for mechanical strenght.
  4. Solder Emitter Leads to feed thru.
  5. Change R31 & R32 from 2.7KOhm to 1.5KOhm.

[Upgrade diagram]



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This page has been created by Sami Rautiainen.
Read the small print. Last updated June 11, 2002.