- 160 Posts. Joined 2/2007
- Location: greater nashville metropolitan area
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The BCR-NWU3 dock has the full complement of 22 pins. The line-out function seems to operate perfectly well without anything attached to the dock (i.e. no USB cable or power attached) and immediately overrides the headphone out.
If you look at Page 25 or 26 of the Service Manual, there is a breakdown of the WM-PORT pin connections (pins 14 and 17 are highlighted for obvious reasons):
2 RESERVE (OTG)
If anyone wants to attempt a DIY cable using the supplied USB cable (Sony WMC-NW20MU), the pins are ordered as follows:
Pin 1 ---------------> Pin 22
As far as I can tell, connecting pins 14 and 17 up to a 3.5mm jack or pair of RCA connectors should work (however, I don't know how the other pins will affect a DIY cable). The Sony WMC-NWR1 looks like a possible alternative cable which could be modded for purpose.
Well I do know that sony makes accessories with a line out on them that are designed for their MP3 players with a WM Port on them. I have one with me.