Fujitsu MAS3367FC, Product/Maintenance Manual

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4.1 Mounting Requirements
C141-E198 4-5
(3) Limitation of bottom-mounting
Use all 4 mounting holes on the bottom face.
(4) Environmental
temperature
Temperature condition at installed in a cabinet is indicated with ambient temperature measured 3 cm
from the disk drive. At designing the system cabinet, consider following points.
•
Make a suitable air flow so that the DE surface temperature does not exceed 60°C.
•
Cool the PCA side especially with air circulation inside the cabinet. Confirm the cooling effect
by measuring temperature of specific ICs and the DE. These measurement results should be
within a criteria listed in Table 4.1.
•
Keeping the DE surface temperature at 50
°
C or below at ambient temperature 25
°
C, which is a
condition for assuring an MTBF of 1,200,000 hours, requires an air flow of 0.7 m/s.
Table 4.1 Surface temperature check point
No. Measurement point Criteria
1 Center of DE cover 60°C
2 Read channel LSI 88°C
3 VCM/SPM Driver 92°C
4 HDC 90°C
5 MPU 91°C
1
2
4
5 3
Figure 4.5 Surface temperature measurement points