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1.2 Hardware Structure
C141-E198 1-5
(19) Low power consumption
By using highly integrated LSI components, the power consumption of the IDD is very low, and this
enables the unit to be used in wide range of environmental conditions.
(20) Low noise and low vibration
The noise level is low; approx. 3.6 Bels Ready for MAS series. This makes it ideal for office use.
(21) Microcode downloading
The IDD implements the microcode download feature. This feature achieves easy maintainability of
the IDD and function enhancing.
1.2 Hardware Structure
An outer view of the IDD is given in Figures 1.1. The IDD is composed of the disk, head, spindle
motor, mounted disk enclosure (DE) with actuator and air circulation filter, as well as read/write pre-
amp with the printed circuit assembly (PCA) of the controller.
Figure 1.1 FC model drives outer view
(1) Disks
The disks have an outer diameter of 70 mm (2.8 inch) and an inner diameter of 25 mm (0.98 inch) for
MAS series. The disks are good for at least 20,000 contact starts and stops. Each model contains
following number of disks.
MAS3735FC: 4
MAS3367FC: 2