User`s manual
ENDAT-D2550 USERS MANUAL 
UNICORN COMPUTER CORP. 
15 
J9: LINE-IN & MIC-IN Header (2 x 4 with 2.54mm)  
Pin No.  Signal (KB)  Pin No.  Signal (MS) 
1  LINE_IN_R  2  MIC_ R 
3  JACK_DETECT  4  JACK_DETECT
5  GND_AUD  6  GND_AUD 
7  LINE_IN_L  8  MIC_ L 
Notice: Please connect the jack detect pin to “GND_AUD” if the actual 
connector cannot support the jack detect function! 
J10: SPDIF Header (1 x 5 with 2.54mm)   
Pin No.  Signal (KB)  Pin No.  Signal (MS)
1  +5V  4  GND 
2  N.C  5  SPDIF-IN 
3  SPDIF-OUT     
SMB1: SM BUS Header (1 x 5 with 2.54mm)  
Pin No.  Signal (KB)  Pin No.  Signal (MS)
1  SMB_CLK  4  SMB_DATA 
2  +3.3V  5  GND 
3  IR_RX     
FAN1, FAN2: Cooling Fan Connector 
Pin No.  Function 
1  GND 
2  +12V 
3  Sensor Pin 
ATXPWR: ATX Power connector 










