Fujitsu MBB2073RC, MBB2147RC Surface temperature check point and maximum temperature, Hdc, Mpu

4.1 Mounting Requirements

(6)Environmental temperature

Temperature condition at installed in a cabinet is indicated with ambient temperature measured 30 mm from the HDD. 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 0.5m/s or more is required at ambient temperature 30°C.

Table 4.1 Surface temperature check point and maximum temperature

No.	Measurement point	Maximum temperature
1	DE Surface			60°C
2	Read channel LSI			82°C
3	VCM/SPM Driver			93°C
4	HDC			97°C
5	MPU			94°C
	1		4	5	3

2

Figure 4.5 Surface temperature measurement points

(7)Environmental magnetic field

Do not install the HDDs in the vicinity of equipment giving off strong magnetic fields, such as monitors, televisions, or loudspeakers.

(8)Leakage magnetic flux

Do not mount the HDDs near the devices that the leakage magnetic flux influence easily.

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