NEC NP-NC900C-A Service Manual page 32

J9851 for Fan9
TACH1
12V
GND
PWM1
J9852 for Fan10
TACH2
12V
GND
PWM2
–
J9853 –
TACH3
12.5V
GND
PWM3
–
–
J9854 –
TACH4
12.5V
GND
PWM4
–
–
–
"Confidential, Do Not Duplicate without written authorization from NEC."
TROUBLESHOOTING
f
1 FAN Speed indication. (Pluse)(5V)
2 g The PWM Fan Voltage input
3 – GND
4 g FAN Speed control Output(PWM)
1 f FAN Speed indication. (Pluse)(5V)
2 g The PWM Fan Voltage input
3 – GND
4 g FAN Speed control Output(PWM)
5 – –
1 f FAN Speed indication. (Pluse)(5V)
g
2 The PWM Fan Voltage input
3 – GND
4 g FAN Speed control Output(PWM)
5 – –
6 – –
1 f FAN Speed indication. (Pluse)(5V)
g
2 The PWM Fan Voltage input
3 – GND
4 g FAN Speed control Output(PWM)
5 – –
6 – –
7 – –
4-22