360K Floppy Drive  (250-4051/A/B)       Settings        Faxback Doc. # 5262
  
NOTE: The below jumper settings and information are for the 250-4051 and 
250-4051A only. For the 250-4051B, refer to the section following this one.

NOTES & JUMPERS:
DS1  Both floppy drives in system use DS1 as the cable selects the drive
HC   Causes head load with door close
DC   Resets status on falling edge of step pulse
MM   Selects active low motor on

TERMINATION:
The terminating resistor pak should be installed at location B6 on the
last drive on the cable.
The termination resistor is a 150 ohm, 8 resistor 16-pin dip (Cat #25-
3000A; Part # ARX-0397).

DIAGNOSTICS:
These are available through National Parts -
  AXX-2053  Tandy 3000 Diagnostic Disk
  AXX-2046  Double-sided, 40-track Alignment Disk


NOTE: The below jumper settings and information are for the 250-4051B. For 
the 250-4051 and 250-4051A, refer to the section preceding this one.

NOTES & JUMPERS:
DS1  Both floppy drives in system use DS1 as the cable selects the drive
MM   Spindle motor power controlled by 'MOTOR ON' signal

TERMINATION:
The last drive on the cable should be terminated with a 16-pin dip, 150ohm
resistor package (Cat #25-4001; Part # ARX-0040).

DIAGNOSTICS:
These are available through National Parts -
  AXX-2052  Diagnostic Disk
  AXX-2054  Alignment Disk

(dtc-08/02/93)