4-28
TROUBLESHOOTING
“Confidential, Do Not Duplicate without written authorization from NEC.”
Fan Driver BD – E side
CN9820 From SLAVE uC BD (J10)
Note: Pin to Pin
CN9821 for Fan7
CN9822 for Fan12
CN9823 for Fan13
12V
1
f
12V Input
12V
2
GND
3
–
GND
5V
4
f
5V Input
GND
5
–
GND
I2C_SCL
6
f
I2C communication between uC BD and Fan Driver BD
I2C_SDA
7
n
FAN_Driver BD_Flag
8
g
If FAN actual RPM is out of the programmed value, ALERT pin
goes low.
–
9
–
–
–
10
–
–
–
11
–
–
FG1
1
f
FAN Speed indication. (Pluse)(5V)
Vout
2
g
Fan voltage out
GND
3
–
GND
FG1
1
f
FAN Speed indication. (Pluse)(5V)
Vout
2
g
Fan voltage out
GND
3
–
GND
–
4
–
–
FG1
1
f
FAN Speed indication. (Pluse)(5V)
Vout
2
g
Fan voltage out
GND
3
–
GND
–
4
–
–
–
5
–
–
FG1
1
f
FAN Speed indication. (Pluse)(5V)
Vout
2
g
Fan voltage out
GND
3
–
GND
–
4
–
–
–
5
–
–
–
6
–
–
CN9824 for Fan11
Summary of Contents for NP-NC900C-A
Page 199: ......
