SFD-321B /LFEB REV. T9 Pcb Rev (PCB REV WT-09R-A) Mod Howto

I succesfully modded this drive so I made a little Howto

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This drive works in only HD mode so It doesn’t have the HD sensor.
The controller is the same from older revisions, so I found a method to force the DD density.

To Force double density on the drive:

Very important ! To avoid short circuit you must remove J22 0 Ohm Resistor

Now you have to do the usual actions as in the previous revisions:
• Send DC signal to pin 2
• Send RDY signal to pin 34
• Set drive to DS0

Because there is not any jumper to solder/desolder, you have to cut track versus pin 12 and reroute the signal to pin 10 to set the drive to DS0.

The Final Result