Sony XR-C6100 Service Manual page 15

FM Noise Focus Adjustment
Setting:
[SOURCE]
button : FM
FREQUENCY SELECT switch : FM 50 k
FM RF signal
antenna jack (J1)
generator
0.01 µ F
Carrier frequency : 98.0 MHz
Output level : 60 dB (1 mV)
Mode : mono
Modulation : 1 kHz, 75 kHz deviation (100%)
Procedure:
1. Tune the 98.0 MHz.
2. The then output level is supposing that (A) dB.
3. Adjust with the volume RV3 on TU1 so that the output level is
(A) –32 dB then signal generator input set to –20 dB.
Adjustment Location: See page 16.
FM Stereo Separation Adjustment
Setting:
[SOURCE]
button : FM
FREQUENCY SELECT switch : FM 50 k
FM RF signal
antenna jack (J1)
generator
0.01 µ F
Carrier frequency : 98.0 MHz
Output level : 70 dB (3.2 mV)
Mode : stereo
Modulation : main: 1 kHz, 33.75 kHz deviation (45%)
sub: 1 kHz, 33.75 kHz deviation (45%)
19 kHz pilot: 7.5 kHz deviation (10%)
Procedure:
FM Stereo
Level meter
signal generator
connection
output channel
L-CH
R-CH
R-CH
L-CH
L-CH Stereo separation: A-B
R-CH Stereo separation: C-D
The separations of both channels should be equal.
Specification: Separation more than 30 dB
Adjustment Location: See page 16.
level meter
4 Ω
+
set
–
speaker out terminal
level meter
4 Ω
+
set
–
speaker out terminal
Level meter
reading (dB)
A
L-CH
B
L-CH Adjust RV4 on TU1
for minimum reading.
C
R-CH
D
R-CH Adjust RV4 on TU1
for minimum reading.
MW Auto Scan/Stop Level Adjustment
Setting:
[SOURCE] [MODE]
and
FREQUENCY SELECT switch : MW 9 k
AM RF signal
generator
AM dummy antenna
(50 Ω )
Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
Output level
Procedure:
1. Set to the test mode. (See page 13.)
[SOURCE]
2. Push the
[MODE]
3. Push the button and set to MW.
MW
4. Adjust with the volume RV1 on TU1 so that the "MW" indica-
tion 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.
Adjustment Location: See page 16.
– 15 –
button : MW
30 Ω 15 pF
antenna jack (J1)
: 33 dB (44.7 µ V)
button and set to FM.
Display
999
Display
999
65 pF
set
SHUF1
SHUF1