Carriage Assembly Removal And Replacement - NEC FD1165 Maintenance Manual

d. Open the door of the disk drive, insert a flexible
disk, and close the door.
e. Check on the stepping motor side of the disk drive
that the spring plate does not contact the jacket
of the flexible disk.
f. If the specifications in Step c and Step e cannot
be met, replace the collet assembly.
After checking the head unload spring and spring plate,
check the timing relationship between disk
ejecti~n
and head
unloading as follows.
a. Move the carriage to the outer track, insert a
flexible disk, and close the door.
b. Rotate the head load cam to load the heads.
c. Open the door, making sure that the heads unload
before the flexible disk "pops up."
d. Make sure that the flexible disk does not con tact
the heads during ejection.
4.4.3 Carriage Assembly Removal and Replacement
Use the following procedure to remove the carriage assembly.
a. Remove the PCB.
b. Trace the wiring to the carriage assembly and free
the wiring from the plastic clips that secure the
wiring to the base frame.
c. Remove the wiring, through the base frame, toward
the carriage assembly.
d. Remove the screws that secure the metal clips to the
base frame and remove the clips (see Figure 4-5).
e. Remove the two screws that secure the carr~age
assembly to the base frame, separate the carrlage
assembly from the base frame, then remove it.
4-6