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12 pin SonyEricsson K750i cell phone proprietary connector layout
12 pin SonyEricsson K750i cell phone proprietary connector
Sony Ericsson C702, C902, C905, F305, G502, G700, G705, G900, K205i, K310i, K220i,K320i, K330, K510i, K530i, K550i, K610i, K630i, K660i, K750i, K770i, K790i, K800i, K810i, K850i, M600i, P1i, P990i, R300, R306, S302, S500i, T303, T650i, T700, W200i, W300i, W350i, W380i, W550i, W580i, W595, W610i, W660i, W700i, W710i, W760i,W800i,W810i W850i,W880i, W890i, W900i, W902, W910i, W950i, W960i, W980, Z250i, Z310i, Z320i, Z530i, Z550i, Z555i, Z610i, Z710i, Z750i, Z770i, Z780i pinout. Cable is DCU-60


Pin Signal Description
1 USB +5V in  USB 5V supply - not used in K750
2 SP_REF  Reference / GND for handsfree
3 Mic+/AUXIN_L  Mic + / AUX in (left)/ short with pin 4 for handsfree answer (*)
4 Mic-/AUXIN_R  Mic - / AUX in - (right) / short with pin 3
5 DFMS/SP_L  DFMS / Earphones left
6 DTMS/SP_R  DTMS / Earphone right
7 VIDEO/STB  Video / strobe
8 VPPFLASH  short with pin 9 via R=130 Om for handsfree detection
9 GND Ground
10 CTMS / USB DATA+  CTMS / USB+ (data) - not used in K750
11 CFMS / USB DATA-  CFMS / USB- (data) - not used in K750
12 Charge In  Battery charge (+5V) - not used in K750


 Used Shortcuts:


 * CTMS stands for Control To Mobile Station

 * CFMS stands for Control From Mobile Station

 * DTMS stands for Data To Mobile Station

 * DFMS stands for Data From Mobile Station




The key in near pin 1.

If you want to make a stereo converter with a SE socket, you should use pins 5 and 6. It may not work well with an amplifier due to low output i.e. just enough power for headphones . (May need pre-amp).


To make a stereo-amp using the cell phone you must shortcircuit pins 8 and 9. Then connect the outputs (L) (R) (GND) using pins 5 = (left), 6 = (right) and 9 = (GND).

Sony-Erisson Walkman original handset uses pins 2 (GND), 5 (Left) and 6 (Right).


(*) For incoming call answering short pin 3 and 4

Headset for S302 and similiar phones pinout: R pin 7, L pin 8, pin 11 is GND for both channels and probbably for microphone too. Active gain should be between 50 and 200 for LM386.

According to 49 reports in our database (45 positive and 4 negative) the Sony Ericsson 12 pin connector (SonyEricsson Fast Port) pinout should be correct.

Is this pinout
Sony Ericsson 12 pin connector (SonyEricsson Fast Port) visual pinout:click to enlarge
Source(s) of this and additional information: experience
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