38MGR-04SM Specifications subject to change without notice.
51
DIAGNOSIS AND SOLUTION (CONT)
Index 1:
DC fan motor (control chip is inside fan motor)
Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not
in the range showing in the table below, the PCB needs to be replaced.
Fig. 60 — DC Fan Motor
Fig. 61 —Test the Voltage
NO.
COLOR
SIGNAL
VOLTAGE
1
Red
Vs/Vm
200~380V
2
---
---
---
3
Black
GND
0V
4
White
Vcc
13.5~16.5V
5
Yellow
Vsp
0~6.5V
6
Blue
FG
13.5~16.5V
Vs
Vcc
Vsp
FG