JVC HA-W500RF - Measurement Condition; Print Circuit Board

HA-W500RF (EG)/(EK)
(No.70270) 5
4.Print Circuit Board
Back side
Receiver (Headphones)
CHARGE P. C. BOARD
TOP
3.Measurement Condition
AC IN
Transmitter Receiver (Headphones)
Distance : 1m (3.28ft)
Reference input signal :1kHz 300mVp-p sine wave
Hedaphone volume control : MAX
Surface
shows the B(+) power supply
shows the ground
shows others.