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5. Troubleshooting
6) CPU Fan Control Problems
No
1
FAN Operating Voltage
> The procedures to measure the fan operating voltage:
Remove the fan connector and measure pins 1 and 3 of the connector of the board.
The fan operating program will be provided later.
> Criteria for accepting the fan operation voltage
: It is accepted if the fan operating voltage is within a +/-10% range of the specifications.
No
FAN Operation Mode Switching
2
Conditions
3
Thermal Protection
Item
Item
Mode
Low
Middle1
Middle2
High1
High2
Mode
Low
Middle1
Middle2
High1
High2
Speedstep 1
Speedstep 2
Throttling
Shutdown
5- 23
Design Guideline
DC 2.5V
DC 3.0V
DC 3.5V
DC 4.0V
DC 4.5V
Design Guideline
↑ 50 ℃
/ ↓ 45 ℃
↑ 60 ℃
/ ↓ 55 ℃
↑ 68 ℃
/ ↓ 63 ℃
↑ 73 ℃
/ ↓ 70 ℃
↑ 85 ℃
/ ↓ 83 ℃
↑ 90 ℃
↑ 93 ℃
↑ 95 ℃
↑ MICOM Shutdown 100 ℃
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