Acer ASPIRE 5251, Service Manual

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Chapter 1 15
CPU Fan True Value Table (Tj = 100 UMA)
• Throttling 50%: On=95°C, Off=85°C
• OS Shutdown: 100°C
• H/W Shutdown: 92°C
Fan Acoustic Specifications
NOTE: Tone:20~399Hz refers to slope of Ecma-074, 400~20K Hz < 7 Prominence ratio. No pattern occurred
on Prominence vs. time diagram.
CPU Temp (°C)
Core 0
Fan Speed (rpm) SPL Spec (dBA)
50 2500 28
56 2900 31
63 3200 34
70 3600 37
80 4000 40
95 4000 40
Operation
Mode
Application
SPL
dBA
Loudness (Sone)
Tone
(dB)
Fan off Windows Idle (HDD random
seek) N/A • 20~3.99kHz less than or
equal to: 0.035
• 4K~20kHz less than or
equal to: 0.035
7
Fan 1 Windows Idle 28 N/A 7
Fan 2 Windows Idle, HDD spinning 31 N/A 7
Fan 3 Play Movie (read from HDD),
Play TV (TV tuner sku) 34 N/A 7
Fan 4 3DMark06,Prime95,
Play TV(TV tuner
sku), acer screen saver, HDD
spinning 37 N/A 7
Fan 5 TAT100% or
Thermanow100%,3DMark06,
at ambient 35C, HDD
spinning 40 N/A 7
ODD
(Reference) ODM’s test software
(Sequential) with Fan 4 43 N/A N/A