IBM MICRO TOWER 2169 - Manual (Page 128)

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t CPU FAN : CPU cooling FAN Power
connector. Pin 1 nearest to cpu
Pin No. Function
1 GND.
2 +12V
3 SENSE
t CAS FAN: Power FAN Connector. Pin 3
nearest to cpu
Pin No. Function
1 GND.
2 +12V
3 SENSE
t JP1 : Clear CMOS. Pin 1 marked on pcb
Pin No. Function
1-2 close Normal operation (Default).
2-3 close Clear CMOS
t CD1: CD Audio Line in. Pin 4 nearest to cpu
Pin No. Function
1 CD_L
2,3 GND
4 CD_R
t CD2 :AUX_IN. Pin 1 nearest to cpu
Pin No. Function
1 AUX_L
2,3 GND
4 AUX_R