NEC FD1165 - Head Unload Spring in Relation to Spring Plate; Position of the Spring Plate

e. After the collet assembly is in place, check that
there is no clearance between the head unload spring
and the spring plate (see Figure 4-3). If there is
clearance, replace collet assembly with a new one.
HEAD UNLOAD SPRING
~--------..~
SPRING PLATE CLEARANCE
(REPLACE)
(NORMAL)
Figure 4-3 Head Unload Spring in Relation to Spring Plate
If the clearance between the head unload spr ing and the
spr.ing plate is within specifications, check the position
of the spring plate as follows.
a. Make sure that the head load cam is in the unload
position.
b. Insert a flexible disk into the drive until the disk
locks in place: remove the flexible disk and close
the door.
c. Check with a feeler gauge that the clearance between
the spring plate and the surface of the base frame
is .044 to .060 inches (1.1 to 1.5 rom) (see Figure
4-4) •
HEAD UNLOAD SPRING .044 to .060 in.
/
(1.1 to 1.5mm)
me
Figure 4-4 position of the Spring Plate
4-5