Sony CDX-C7850R Service Manual page 21

FM RDS S-Meter Adjustment
Setting :
SOURCE button : FM
FM RF signal
generator
Carrier frequency : 98.00 MHz
: 35 dB (56.2 µ V)
Output level
Mode : mono
Modulation : no modulation
Procedure :
1. Set to the test mode. (See page 19.)
2. Push the SOURCE button and set to FM.
Display
SHUF
3. Push the preset 10 button.
4. Adjust RV10 so that the display indication is "13.0".
Display
SHUF
Specification : Display indication : 12.8 to 13.2.
Adjustment Location : See page 22.
antenna
terminal
0.01 µ F
set
MW Auto Scan/Stop Level Adjustment
Setting :
SOURCE n MODE button : MW
AM RF signal
generator
Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
: 33 dB (44.7 µ V)
output level
Procedure :
1. Set to the test mode. (See page 19.)
2. Push the SOURCE button.
3. Push the MODE button and set to MW.
TP
4. Push the preset 3 button.
TP
5. Adjust with the volume RV1 on TU10 so that the "MW"
indication turns to "MW0" indication on the display window.
But, in case of already indicated "MW0", turn the RV1 so that
put out light "0" indication and adjustment.
TP
Adjustment Location : See page 22.
– 21 –
30 Ω
15 pF
65 pF
AM dummy
antenna(50 Ω )
set
antenna
terminal
Display
SHUF
Display
SHUF
Display
SHUF