Sony MDR-RF845R Service Manual page 6

Ver 1.2 2001. 11
17. Check the difference of the L and R to more than 20 dB.
Digital voltmeter
(AC range)
L+ / R+
+
L– / R–
–
Adjustment Location :
[RX-BASE BOARD]
(Conductor side)
TP(R312-C320)
GND
S301:
TUNE switch
L301:
Receive Frequency
Adjustment
OSCILLOSCPE
CH1 CH2
L+ IC301 pin4
+ +
L–
– –
RV302:
Volume control
— 6 —
IC301 7
(Connect a 33k Ω resistor)
IC301 4
IC301 6
GND
R+
RV301:
Free Run Frequency
Adjustment
Short
+B
power line
(DC 2.4V)
L–
L+
R–