Fujitsu MBA3073NC Product Manual - Page 56

Limitation of side-mounting, Table 4.1, Surface temperature check point - drivers

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4 Holes for mounting screw 3 2 In case of using a center hole, use it in combination with the holes of both ends. 1 Holes for mounting screw Use four holes (No.1 to No.4) to mount. Figure 4.5 Limitation of side-mounting (4) Limitation of bottom-mounting Use all four mounting holes on the bottom face. (5) 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 Surface temperature check point No. Measurement point 1 DE surface 2 Read channel LSI 3 VCM/SPM Driver 4 HDC 5 MPU Max. temperature on package 60 °C 82 °C 100 °C 100 °C 94 °C 52 Downloaded from www.Manualslib.com manuals search engine C141-E270

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Use four holes (No.1 to No.4) to mount.
Holes for
mounting screw
1
2
3
4
In case of using a
center hole, use it in
combination with the
holes of both ends.
Holes for mounting screw
Figure 4.5
Limitation of side-mounting
(4)
Limitation of bottom-mounting
Use all four mounting holes on the bottom face.
(5)
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
Surface temperature check point
No.
Measurement point
Max. temperature on
package
1
DE surface
60 °C
2
Read channel LSI
82 °C
3
VCM/SPM Driver
100 °C
4
HDC
100 °C
5
MPU
94 °C
52
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