Seagate Cheetah 9LP Series, Product Manual

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Cheetah 9LP Product Manual, Rev. C 23
Notes.
[1] Section 8.3.1 describes the air-flow patterns used when generating the 1 million hours MTBF guide-
lines in column 2. Air flow was opposite that shown in Section 8.3.1. Local air velocity was 0.92 m/sec
(180 lfpm). Inlet air temperature to the drive was 77°F (25°C), plus 9°F (5°C) temperature rise in the
test enclosure (86°F/30°C ambient local to the drive).
[2] Measure HDA temp at point labeled “HDA” on Figure 4.
[3] PCB mounted integrated circuit case.
b. Non-operating
–40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This
specification assumes that the drive is packaged in the shipping container designed by Seagate for use with
drive.
Figure 4. Locations of PCBA components listed in Table 3
6.4.2 Relative humidity
The values below assume that no condensation on the drive occurs.
a. Operating
5% to 95% non-condensing relative humidity with a maximum gradient of 10% per hour.
b. Non-operating
5% to 95% non-condensing relative humidity.
Model “LW” PCBA
Model “LC” PCBA
J4
U14
U1
U20
U12
J6
U11
U5
J1
J1A
U18
U3
U7
U6
U4
J4
U14
U1
U20
U12
J6
U11
U5
U18
U3
U7
U6
U4
J2
HDA Temp.
Check Point
.5"
1.0"
1
2
4
3
1
2
4
3