Read Sony XR-1100 (serv.man2) Service Manual online
12
FM Stereo Separation Adjustment
Setting:
[TUNER]
button: FM
Procedure:
L-CH Stereo separation: A-B
R-CH Stereo separation: C-D
The separations of both channels should be equal.
R-CH Stereo separation: C-D
The separations of both channels should be equal.
Specification: Separation more than 26 dB
Adjustment Location: See page 13.
FM Stereo
Level meter
Level meter
signal generator
connection
reading (dB)
output channel
L-CH
L-CH
A
B
R-CH
L-CH
Adjust RV1 on TU100
for minimum reading.
R-CH
R-CH
C
D
L-CH
R-CH
Adjust RV1 on TU100
for minimum reading.
FM RF signal
generator
Carrier frequency : 98.0 MHz
Output level
Output level
: 76 dB (6.3 mV)
Mode
: stereo
Modulation
: main: 1 kHz, 33.75 kHz deviation (45%)
sub: 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 (CN100)
+
–
–
speaker out terminal
level meter
4
Ω
AM Auto Seek/Stop Level Check
Setting:
[TUNER]
button: AM
Procedure:
1. Tune the set to 999 kHz.
2. Connect the digital voltmeter to TP (SD) on MAIN board.
3. The reading on the digital voltmeter changes point from low
1. Tune the set to 999 kHz.
2. Connect the digital voltmeter to TP (SD) on MAIN board.
3. The reading on the digital voltmeter changes point from low
to high.
Adjustment Location: See page 13.
AM RF signal
generator
Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
Output level
30% amplitude
modulation by
1 kHz signal
Output level
: 33 dB (44.7
µ
V)
±
6 dB
(50
Ω
)
set
AM dummy antenna
30
Ω
15 pF
65 pF
antenna jack (CN100)
+
–
–
TP (SD)
MAIN board
digital
voltmeter
voltmeter
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