1.2MB Floppy Drive  (250-4050)       Settings           Faxback Doc. # 5355

MANUFACTURER:  MITSUBISHI
MODEL:   M4854-347USA
HEADS:   2
CYL:     40
PART #:  AXX-5106
SUB-ASSEMBLY PART #:  AXX-5109

SUPPORTED ON:  3000s/4000s

NOTES & JUMPERS:
DS1  Both floppy drives in system use DS1 as the cable selects the drive
TD   Termination Select
HC   Selects constant head load
UD   Disables head unload delay
DC   Selects active low diskette change
MM   Spindle motor power controlled by 'MOTOR ON' signal
RR   Output selected by 'DRIVE SELECT' signal
SB   Selects 360 RPM for both high and low density modes
1IH  LED will light with the 'DRIVE SELECT' signal

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 #250-
3000A; Part # ARX-0397).

DIAGNOSTICS:
These are available through National Parts -
  AXX-2053  Tandy 3000 Diagnostic Disk
  AXX-2041  Alignment Disk

SYSTEM CONFIGURATIONS:
  Spindle rotation speed is 360RPM.
  The M4854-347 drive is not interchangeable with the M4851-1.


MANUFACTURER:  MITSUBISHI
MODEL:   MF504A-347UA
HEADS:   2
CYL:     40
PART #:  AXX-5109
SUB-ASSEMBLY PART #:  AXX-5106

SUPPORTED ON:  3000s/4000s

NOTES & JUMPERS:
DS1  Both floppy drives in system use DS1 as the cable selects the drive
TD   Connect drive select terminator
DC   Diskette Change, activates signal when drive latch opened
MM   Spindle motor power controlled by 'MOTOR ON' signal
RR   Output selected by 'DRIVE SELECT' signal
SB   Selects 360 RPM for both high and low density modes

TERMINATION:
  The last drive on the cable should be terminated with a 150 ohm, 16-pin
dip (Cat #250-4001; Part # ARX-0040).

DIAGNOSTICS:
These are available through National Parts -
  AXX-2052  Diagnostic Disk
  AXX-2041  Alignment Disk
    
SYSTEM CONFIGURATIONS:
  Spindle rotation speed is 360RPM.


MANUFACTURER:  MITSUBISHI                
MODEL:   MF504B-347UA                     
HEADS:   2
CYL:     40
SUB-ASSEMBLY PART #:  AXX-5106

SUPPORTED ON:  3000s/4000s

NOTES & JUMPERS:                     
DS1  Both floppy drives in system use DS1 as the cable selects the drive
TD   Connect drive select terminator
DC   Diskette Change, activates signal when drive latch opened
MM   Spindle motor power controlled by 'MOTOR ON' signal
RR   Output selected by 'DRIVE SELECT' signal
SB   Selects 360 RPM for both high and low density modes

TERMINATION:
  The last drive on the cable should be terminated with a 150 ohm, 16-pin
dip (Cat #250-4001; Part # ARX-0040).

DIAGNOSTICS:
These are available through National Parts -
  AXX-2052  Diagnostic Disk
  AXX-2041  Alignment Disk
    
SYSTEM CONFIGURATIONS:
  Spindle rotation speed is 360RPM.

(css 07/30/93)