Write Protect Sensor Check Or Adjustment - NEC FD1165 Maintenance Manual

5.5.3

Write Protect Sensor Check or Adjustment

After the write protect
following check.
a. Insert
notch into the disk drive.
b. Check that the voltage at TPll is less than 0.5 V.
Move the jacket of the flexible disk to make sure
that the voltage at TPll does not change.
c. If the
fastens the
sensor
flexible disk is moved.
d. Remove the flexible disk and insert a disk without
a write protect notch.
e. Check that the voltage at TPll is more than 3.3 V.
Move the jacket and make sure that the voltage does
not change.
f. If the voltage changes, change
sensor
jacket is moved.
5.5.4 Head Load Check
Perform this check
formed .
a. Write data of all Os to an assigned track (using the
drive tester).
b. Load the heads and look at the read waveform.
c. If the unstable area of the waveform is not within
the specifications shown in Figure 5-8, replace the
carriage assembly.
sensor
a flexible disk
voltage changes,
sensor and change the position of
until the voltage does not change when
until the voltage does not change when
after replacement procedures
5-10
is replaced,
that has a write
loosen the
the position of
perform the
protect
screw that
the
the
the
the
are per­