Tuner Section - Sony XR-CA300 Service Manual

QQ
3 7 63 1515 0

TUNER SECTION

0 dB=1 µV
Cautions during repair
When the tuner unit is defective, replace it by a new one be-
cause its internal block is difficult to repair.
Note: Adjust the tuner section in the sequence shown below.
1. FM RDS S-Meter Adjustment
2. FM Auto Seek/Stop Level Adjustment
3. FM Stereo Separation Adjustment
4. MW Auto Seek/Stop Level Adjustment
FM RDS S-Meter Adjustment
Setting:
[SOURCE]
(CA300) or
FM RF signal
generator
Carrier frequency : 98.00 MHz
Output level
Mode
Modulation
Procedure:
1. Set to the test mode. (see page 13)
[SOURCE]
2. Push the
set to FM.
TE
L 13942296513
REG
SHUF
[6]
3. Push the button.
4. Adjust RV100 on main board so that the display indication is
"8.4".
REG
SHUF
Specified Value: Display indication: 8.2 to 8.6
Adjustment Location: See page 17.
www
.
http://www.xiaoyu163.com
[TUNER]
(L200) button: FM
antenna jack (ANT100)
0.01 µ F
set
: 35 dB (56.2 µ V)
: mono
: no modulation
[TUNER]
(CA300) or (L200) button and
Display
MBP
Display
MBP
x ao u163
y
i
http://www.xiaoyu163.com
2 9
8
FM Auto Seek/Stop Level Adjustment
Setting:
[SOURCE]
(CA300) or
FM RF signal
generator
Carrier frequency : 98.00 MHz
Output level
Mode
Modulation
Procedure:
1. Set to the test mode. (see page 13)
[SOURCE]
2. Push the
set to FM.
REG
SHUF
3. Adjust with the volume RV3 on TU100 so that the "FM" indi-
cation turns to "FM0" indication on the display window.
But, in case of already indicated "FM0", turn the RV3 so that
put out light "0" indication and adjustment.
Q Q
3 6 7 1 3 1 5
REG
SHUF
Adjustment Location: See page 17.
co
.
XR-CA300/L200
9 4 2 8
[TUNER]
(L200) button: FM
0.1pF
dummy
antenna
antenna
50 Ω
jack (ANT100)
50 Ω
set
: 22 dB (12.6 µ V)
: mono
: 1 kHz, 22.5 kHz deviation (30%)
[TUNER]
(CA300) or (L200) button and
Display
Display
0 5 8 2 9 9 4 2 8
m
9 9
MBP
9 9
MBP
15