SPDIFO
SPDIF OUT
VCC
SPK
VCC
KEY
CPU_FAN
Ground
+12V
Sensor
PWM
SYS_FAN
NC
+12V
Ground
CASE
Ground
Intruder
CLR_CMOS Jumper
1-2: NORMAL
2-3: CLEAR CMOS
1 2
3
Before clearing the CMOS, make sure to turn off the system.
CLR_CMOS
USBPWR_R (Rear USB PS/2 Power Select Jumper)
1
2
3
USBPWR_F (Front Panel USB Power Select Jumper)
3
2
VCC
1
(Default)
A55F2-M4 USER MANUAL
Ground
KEY
Signal
Ground
3
2
5VSB
1
5