Fujitsu MAN3367FC Manual/User Guide - Page 61
Read channel LSI
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(3) Limitation of bottom-mounting Use all 4 mounting holes on the bottom face. 4.1 Mounting Requirements (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 55°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 40°C or lower, which is a condition for assuring an MTBF of 1,200,000 hours, requires an air flow of 1.0 m/s. Table 4.1 Surface temperature check point No. Measurement point 1 Center of DE cover 2 Read channel LSI 3 VCM/SPM Driver 4 HDC 5 MPU Criteria 55°C 90°C 92°C 95°C 88°C 3 1 4 5 2 Figure 4.5 Surface temperature measurement points C141-E133-02EN 4-5
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