Tandon TM848-2 Floppy drive power

24 Jan 2007

...
    OK, I'm home looking at the drive. The wiring
harness from the power
 supply does connect +5, +12, and +24 to the plug that goes into the
 drive. However the TM848-2 drives have pin 4 vacant on the   connector on
  the drive. That is, there is no pin there. Sounds
  dangerous, but that is
  typical of Tandy's shortcuts.  
 Tandy and Tandon are not THAT close.

  The wiring harness is made by Tandy, in the Tandy 6000. That this 
 harness has power going to a drive power plug that isn't used it typical 
 of Tandy's shortcuts. They banked on the fact that Tandon would NEVER 
 put another pin in that socket.  
I think that's a rather strange conclusion to some to.

I'd think of it more like this ; 

Some 8" drives need the +12V supply, and when it's needed it's on pin 4 
of the connecotr. So Tandy wired the harness to allow for such drives.

This particular Tandon drive doesn't need 12V, so pin 4 is missing (or a 
no-connect).

How can _adding_ a wire to a harness be a shortcut?

-tony

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Tandon TM848-2 Floppy drive power