NEC FD1165 - Pop-Up Feature; Index Sensor; Track Sensor; Write Protect Sensor

1.2.7 Pop-Up Feature
For easy removal of the flexible disk from the disk drive,
the pop-up feature ejects the flexible disk from the disk
drive when the door is opened. After ejection, the edge of
the flexible disk protrudes approximately 1/2 inch (13 mm)
from the disk drive.
1.2.8 Index Sensor
The index sensor is a combination LED and phototransistor
that senses the index position of the flexible disk. The
Model FDl165 has a dual index sensor to detect both single-
sided and dual-sided flexible disks.
1.2.9 00 Track Sensor
The 00 Track sensor detects when the read/write head is at
the 00 track (track 0, side 0).
1.2.10 Write Protect Sensor
The write protect sensor detects the presence or absence of
a write protect notch on the flexible disk. If there is a
notch, the write function is disabled. If no notch exists,
the write function operation is enabled.
1.2~11 Media-In Sensor
The media-in sensor detects the presence of a flexible disk
in the disk drive.
1.2
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12 Collet Assembly
The collet assembly holds the flexible disk in position on
the spindle when the door is closed.
1.2.13 Printed Circuit Board (PCB)
The PCB (not shown) supports the electronic drive and logic
circuits of the disk drive.
1.2.14 Variable Frequency Oscillator (Optional)
The optional Variable Frequency Oscillator (VFO) PCB makes
the interface signals to the controller more stable, in-
creasing the overall reliability of the disk drive.
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