Sony PCV-L400 - Manual (Page 65)

System Board 57
Phones and Mic Connectors
The Phones jack is stereo mini-jack (3.5 mm) that connects to headphones.
The Mic jack is a stereo mini-jack (3.5 mm) that connects to a microphone.
Phones jack
Pin
Signal
Sleeve GND
Tip Left Out
Ring Right Out
Mic jack
Pin
Signal
Sleeve GND
Tip Microphone Mono In
Ring Electret Bias Voltage
KY0058A.VSD
Phones
Mic
Volume
control knob