Acer Aspire X3990 Service Manual page 90

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Connecting Case Components
CPU_FAN: CPU cooling FAN Power Connector
Pin
1
2
3
4
SYS_FAN: System Cooling FAN Power Connector
Pin
1
2
3
4
Chapter 5
Signal Name
GND
+12V
Sense
Control
Signal Name
GND
+12V
Sense
CONTROL
Function
System Ground
Power +12V
Sensor
CPU FAN control
Function
System Ground
Power +12V
Sensor
CONTROL
82

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