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MPI DRIVE ASSEMBLIES
8050/8250

PARTS LIST

805005901 Drv0 MP1 Drive 8050*
805005902 Drv1 MPI Drive 8050*
825002901 Drv0 MPI Drive 8250*
825002902 Drv1 MPI Drive 8250*

 *NOTE: Drv0 and Drv1 parts are interchangeable.
Separate part numbers are required for
complete drives due to the manner in
which the wiring harnesses are
assembled.
  1. 31421501 MPI DOOR/HUB ASSEMBLY
    1. Door Assy. w/Frame
    2. Hub/Collect Assy.
  2. 31421601 MPI LEFT DISK GUIDE
    1. Left Disk Guide w/Write Protect Assy.
  3. 31421701 MPI RIGHT DISK GUIDE
  4. 31421801 MPI FRONT BEZEL
  5. 31421901 MPI 8050 R/W HEAD ASSY.
    1. R/W Head w/Harness
    2. Load Arm w/Pad
    31422001 MPI 8250 R/W HEAD ASSY.
    1. Up/Low R/W Head w/Harness
  6. 31422201 MPI DC MOTOR
  7. 31422301 MPI HOUSING/SPINDLE ASSY.
    1. Housing Base
    2. Spindle/Tach Assy.
    3. L/R Guide Shafts
    31422401 MPI DRIVE BELT
    31422501 MPI HARDWARE
    1. Assorted Screws
    2. Assorted Springs, Etc.
  8. 31422601 MPI SWITCH/HARNESS ASSY.
    1. Door Sensor Switch w/Mtg Bracket
    2. Wiring Harness W/P & LED
  9. 31422701 MPI W/P Servo PCB Drv1
    31422801 MPI Analog PCB Bracket Drv0
    31417401 UNIV. Replacement Load Pad
  10. 90382001 UNIV. LED Holder (2 pc.)
    32086901 Drive 0 Label
    32086902 Drive 1 Label
[Wiring diagram and layout]
DRIVE 0 WIRING
P2 5 NOTE *HEAD 1 (UPPER) R/W HEAD
 4 GND/SHIELD SHIELD, CENTER TAP, COMMON
 3 RED ERASE HEAD
 2 N/C -
P2 1 NOTE *HEAD 1 (UPPER) R/W HEAD
P1 5 NOTE *HEAD 0 (LOWER) R/W HEAD
 4 GND/SHIELD SHIELD, CENTER TAP, COMMON
 3 RED ERASE HEAD
 2 N/C -
P1 1 NOTE *HEAD 0 (LOWER) R/W HEAD
P8 16 WHT STEPPER MOTOR, PHASE D
 15 RED STEPPER MOTOR, PHASE B
 14 N/C -
 13 N/C -
 12 BLK STEPPER MOTOR, +12V
 11 N/C -
 10 GRN STEPPER MOTOR, PHASE C
 9 BRN STEPPER MOTOR, PHASE A
 8 RED (P4-1) WRITE PROTECT SWITCH, AMPLIFIER
 7 BLK (P4-2) WRITE PROTECT SWITCH, GROUND
 6 BLK DOOR SWITCH, NORMALLY OPEN
 5 RED DOOR SWITCH, COMMON
 4 BLU DOOR SWITCH, RETURN
 3 YEL TACHOMETER
 2 GRN TACHOMETER
P8 1 RED DRIVE MOTOR, +12V
P4 2 BLK (P8-7) WRITE PROTECT SWITCH, GROUND
P4 1 RED (P8-8) WRITE PROTECT SWITCH, AMPLIFIER
P2 4 BLK WRITE PROTECT LED, CATHODE
 3 BLK WRITE PROTECT TRANSISTOR, EMITTER
 2 RED WRITE PROTECT TRANSISTOR, COLLECTOR
P2 1 RED WRITE PROTECT LED, ANODE
NO LABEL2 GRN DRIVE LED, ANODE
NO LABEL1 BLK DRIVE LED, CATHODE
CONN NO. PIN NO.WIRE COLORWIRE DESTINATION
DRIVE 1 WIRING
P4 5 NOTE *HEAD 1 (UPPER) R/W HEAD
 4 GND/SHIELD SHIELD, CENTER TAP, COMMON
 3 RED ERASE HEAD
 2 N/C -
P4 1 NOTE *HEAD 1 (UPPER) R/W HEAD
P3 5 NOTE *HEAD 0 (LOWER) R/W HEAD
 4 GND/SHIELD SHIELD, CENTER TAP, COMMON
 3 RED ERASE HEAD
 2 N/C -
P3 1 NOTE *HEAD 0 (LOWER) R/W HEAD
P5 1 BLU DRIVE MOTOR RETURN
 2 YEL TACHOMETER
 3 GRN TACHOMETER
 4 RED DRIVE MOTOR, +12V
 5 RED (P3-1) WRITE PROTECT SWITCH, AMPLIFIER
 6 BLK (P3-2) WRITE PROTECT SWITCH, COMMON
 7 BLK DOOR SWITCH, NORMAL OPEN
 8 RED DOOR SWITCH, COMMON
 9 WHT STEPPER MOTOR, PHASE D
 10 RED STEPPER MOTOR, PHASE B
 11 N/C -
 12 N/C -
 13 BLK STEPPER MOTOR, +12V
 14 N/C -
 15 GRN STEPPER MOTOR, PHASE C
P5 16 BRN STEPPER MOTOR, PHASE A
P3 2 BLK (P5-6) WRITE PROTECT SWITCH, COMMON
P3 1 RED (P5-5) WRITE PROTECT SWITCH, AMPLIFIER
P1 4 BLK WRITE PROTECT LED, CATHODE
 3 BLK TRANSISTOR, EMITTER
 2 RED TRANSISTOR, COLLECTOR
P1 1 WHTZ LED, ANODE
NO LABEL2 GRN DRIVE LED, ANODE
NO LABEL1 BLK DRIVE LED, CATHODE
CONN NO. PIN NO.WIRE COLORWIRE DESTINATION
*NOTE: WIRE COLOR MAY BE BLACK OR WHITE.

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This page has been created by Sami Rautiainen.
Read the small print. Last updated June 08, 1998.