FUJITSU answers^2 D1740 - Manual (Page 23)

Pin assignment of internal ports
Audio port front
1 2
Pin Signal Pin Signal
1 Micro input 2 Analogue GND
3 Micro bias 4 Analogue VCC
5 Right line output 6 Right line return
7 not connected 8 Key
9 Left line output 10 Left line return
If the audio front panel is not used, you must plug jumpers on pin pairs 5/6 and 9/10.
USB - dual channel
(internal or external via special wire)
1 2
Pin Signal Pin Signal
1 Key 2 Chipcard reader on
3 VCC C 4 VCC D
5 Data negative C 6 Data negative D
7 Data positive C 8 Data positive D
9 GND 10 GND
11 Key 12 not connected
Fan 1 (CPU)
(processor fan - only for 3 pin fans)
1
Pin Signal
1 GND
2
Controlled FAN voltage (0V, +6V, ... +12V, max. 1A)
or fix Fan voltage (+12 V, max. 1 A)
3 Fan sense
A26361-D1740-Z120-1-6319, Edition: 3 English - 13