Fujitsu MJA2500BH Maintenance Manual - Page 42
Device Configuration, Disk drive outerview
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Device Configuration 2.1 Device Configuration Figure 2.1 shows the disk drive. The disk drive consists of a disk enclosure (DE), read/write preamplifier, and controller PCA. The disk enclosure contains the disk media, heads, spindle motor, actuator, and a circulating air filter. Figure 2.1 Disk drive outerview (1) Disk The outer diameter of the disk is 65 mm. The inner diameter is 20 mm. (2) Head The heads are of the load/unload (L/UL) type. The head unloads the disk out of while the disk is not rotating and loads on the disk when the disk starts. (3) Spindle motor The disks are rotated by a direct drive Sensor-less DC motor. (4) Actuator The actuator uses a revolving voice coil motor (VCM) structure which consumes low power and generates very little heat. The head assembly at the edge of the actuator arm is controlled and positioned by feedback of the servo information read by the read/write head. If the power is not on or if the spindle motor is stopped, the head assembly stays on the ramp out of the disk and is fixed by a mechanical lock. 2-2 C141-E293