Figure 4.5 Limitation Of Side-Mounting; Table 4.1 Surface Temperature Check Point - Fujitsu MBA3073NC - Enterprise 73.5 GB Hard Drive Product Manual

Holes for
mounting screw
(4)
(5)
52
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3
Use four holes (No.1 to No.4) to mount.
Figure 4.5
Limitation of bottom-mounting
Use all four mounting holes on the bottom face.
Environmental temperature
Temperature condition at installed in a cabinet is indicated with ambient temperature measured
30 mm from the disk drive. At designing the system cabinet, consider following points.
•
Make a suitable air flow so that the DE surface temperature never exceed 60°C.
•
Cool the PCBA side especially with air circulation inside the cabinet. Confirm the cooling
effect by measuring the surface temperature of specific ICs and the DE. These measurement
results must satisfy the temperature condition listed in Table 4.1.
•
Keep the DE surface temperature at 50 °C or below to meet the condition for assuring an
MTBF of 1,400,000 hours. An air flow of 0.9 m/s or more is required at ambient temperature
30 °C.
Table 4.1
No. Measurement point
1 DE surface
2 Read channel LSI
3 VCM/SPM Driver
4 HDC
5 MPU
manuals search engine
4
1
Holes for mounting screw
Limitation of side-mounting
Surface temperature check point
Max. temperature on
2 In case of using a
center hole, use it in
combination with the
holes of both ends.
package
60 °C
82 °C
100 °C
100 °C
94 °C
C141-E270