– 6 –
Carrier frequency modulation adjustment/confirmation
This has to be done for a pair of set.
Before starting, match the channel of both units.
1) Input a 400 Hz 316 mV signal into the left channel of transmitter.
2) Measure the AC voltage at the test point TP2 of MDR-RF940R RX board with AC voltmeter.
Spec.: 13 ± 1.5 mVrms
If not, turn RV51 of TMR-RF940R (channel 1) or RV52 (channel 2) for obtaining the value.
SCHEMATIC DIAGRAM
• MDR-RF940R Service Manual page 8.
(Location B – D, 9 – 11)
!
: Connection point
[RX Board]
PRINTED WIRING BOARD
• MDR-RF940R Service Manual page 5.
(Location F – H, 4 – 6)
[RX Board] – Side A –
Adjustment Location:
[TX Board] – Conductor Side –
^
AC voltmeter
+
–
RV51 (CH1)
RV52 (CH2)
RV21
Deviation Adjustment
Carrier
Frequency
Modulation
Adjustment
IC01
IC21
1
Sony Corporation
Personal A&V Products Company
9-923-239-81
98E0539-1
Printed in Japan © 1998. 5
Published by Quarity Engineering Dept.
(Shibaura)
TMR-RF940R
