– 19 –
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 Auto Scan/Stop Level Adjustment
2. FM Stereo Separation Adjustment (Wide)
3. FM Stereo Separation Adjustment (Narrow)
4. FM RDS S-Meter Adjustment
5. MW Auto Scan/Stop Level Adjustment
FM Auto Scan/Stop Level 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 preset
[3]
button.
Display
4. Adjust with the volume RV2 on TUX10 so that the “FM” indi-
cation turns to “FM0” indication on the display window.
But, in case of already indicated “FM0”, turn the RV2 so that
put out light “0” indication and adjustment.
Adjustment Location: See page 22.
set
antenna jack
FM RF signal
generator
Carrier frequency
: 98.00 MHz
Output level
: 22 dB (12.6
µ
V)
Mode
: mono
Modulation
: 1 kHz, 22.5 kHz deviation (30%)
0.01
µ
F
SHUF
SHUF
SHUF
FM Stereo Separation Adjustment (Wide)
Setting:
[SOURCE]
button
: FM
[SHIFT]
button
: ON (light up SET UP and
PLAY MODE)
Preset
[4]
(PLAY MODE)
n
[5]
(
n
) buttons
: WIDE 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 24 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, 33.75 kHz deviation (45%)
sub : 1 kHz, 33.75 kHz deviation (45%)
:
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 RV3 on TUX10
for minimum reading.
R-CH
R-CH
C
D
L-CH
R-CH
Adjust RV3 on TUX10
for minimum reading.
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
