Sony XR-C7220R, Service Manual

Page: 20 / 57

– 20 –
FM RDS S-Meter Adjustment
Setting:
[SOURCE]
button: FM
Procedure:
1. Set to the test mode. (See page 18)
2. Push the
[SOURCE]
button and set to FM.
Display
3. Push the
[10]
button.
4. Adjust RV10 so that the display indication is “13.2”.
Display
Specification: Display indication: 13.0 to 13.4
Adjustment Location: See page 22.
FM RF signal
generator
Carrier frequency : 98.00 MHz
Output level
: 35 dB (56.2
µ
V)
Mode : mono
Modulation : no modulation
0.01
µ
F
set
antenna jack
SHUF
SHUF
FM Stereo Separation Adjustment (Narrow)
Setting:
[SOURCE]
button : FM
[SHIFT]
button : ON (light up SET UP and
PLAY MODE)
Preset
[4]
(PLAY MODE)
n
[5]
(
n
) buttons : NARROW mode
Procedure:
L-CH Stereo separation:
A
-
B
R-CH Stereo separation:
C
-
D
The separations of both channels should be equal.
Specification: Separation more than 18 dB
Adjustment Location: See page 22.
FM RF signal
generator
Carrier frequency : 98.00 MHz
Output level
: 70 dB (3.2 mV)
Mode : stereo
Modulation : main : 1 kHz, 20 kHz deviation (26.7%)
sub : 1 kHz, 20 kHz deviation (26.7%)
: 19 kHz pilot: 7.5 kHz deviation (10%)
0.01
µ
F
set
antenna jack
+
–
LINE OUT REAR jack
(CN780)
level meter
10 k
Ω
FM Stereo
Level meter Level meter
signal generator
connection reading (dB)
output channel
L-CH L-CH
A
B
R-CH L-CH Adjust RV4 on TUX10
for minimum reading.
R-CH R-CH
C
D
L-CH R-CH Adjust RV4 on TUX10
for minimum reading.