Jumper                                                                             
Settings          Description                                                      
                                                                                   
DSO to DS3        Drive select 0 to 3.*                                                
                                                                                       
FG ML             Connect electrical ground to chassis.                                
                                                                                       
                  Activate motor on in 2 selections.                                   
                                                                                       
                  OFF = Motor-on signal.                                               
                                                                                       
                  ON  = Motor on + LED on (drive selected).                            
                                                                                       
IR                LED on.                                                              
                                                                                       
                  OFF = LED on when drive selected.                                    
                                                                                       
                  ON = LED on when drive selected and ready.                           
                                                                                       
ACD               Inhibit the autochecking at disk installation.                       
                                                                                       
                  OFF = Autochecking operation executed.                               
                                                                                       
                  ON = Autochecking inhibited.                                         
                                                                                       
REN               Execute the autorecalibration at power on.                           
                                                                                       
                  OFF = Autorecalibration inhibited.                                   
                                                                                       
                  ON = Autorecalibration executed at power on.                         
                                                                                       
HMK,NMK           Jumpered to select an output condition of the index and RW data      
                  pulses.                                                               
                                                                                       
DC,RY             Select output signals for terminals 2, 4, and 34.                
                                                                                   
HA                1-MB mode fixed*                                                 
                                                                                   
HA, HI2, HO2, LH1, LH0 Select density mode by either pin 2 or sensor.