Fujitsu MPG3XXXAH-E manual Head, MPG3204AH-E

4.2.2Head

Figure 4.1 shows the read/write head structures. The Numerals 0 to 3 indicate read/write heads. These heads are raised from the disk surface as the spindle motor approaches the rated rotation speed.

MPG3204AH-E

SpindleActuator

1

0

MPG3307AH-E / MPG3409AH-E
Spindle	Actuator
	3
	2
	1
	0

Figure 4.1 Head structure

4.2.3Spindle

The spindle consists of a disk stack assembly and spindle motor. The disk stack assembly is activated by the direct drive sensor-less DC spindle motor, which has a speed of 7,200 rpm. The spindle is controlled with detecting a PHASE signal generated by counter electromotive voltage of the spindle motor at starting. After that, the rotational speed is kept with detecting a servo information.

4 - 2 C141-E116-01EN