Tuner Section - Sony CFD-S350 Service Manual

TUNER SECTION

0 dB = 1 µV
[AM]
Setting:
Function: RADIO
Band: AM or MW or LW
Put the loop
AM RF signal
antenna close to
generator
the set.
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
[FM]
Setting:
Function: RADIO
BAND button: FM
TUNER board
FM RF signal
TP-ANT(JW2)
generator
0.01 µ F
75 kHz frequency
deviation by 1 kHz
TUNER board
signal
TP (GND)
Output level:
as low as possible
TUNER board
TP (CV)
TP (GND)
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca-
pacitors.
• Remove FM antenna in FM adjustment.
MAIN board
KH301 pin 1
level meter
32 Ω
+
set
–
MAIN board
KH301 pin 2
MAIN board
KH301 pin 1
level meter
32 Ω
+
set
–
MAIN board
KH301 pin 2
digital voltmeter
100 k Ω
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
AM FREQUENCY COVERAGE ADJUSTMENT (CFD-S350)
Adjustment Part Frequency Display Reading on Digital Voltmeter
L4 531 kHz
Confirmation 1,611 kHz
AM TRACKING ADJUSTMENT (CFD-S350)
Adjust for a maximum reading on level meter
L3
CT3
MW FREQUENCY COVERAGE CONFIRMATION (CFD-S350L)
Frequency Display
531 kHz
1,611 kHz
MW TRACKING ADJUSTMENT (CFD-S350L)
Adjust for a maximum reading on level meter
L3-1
CT3
LW FREQUENCY COVERAGE ADJUSTMENT (CFD-S350L)
Adjustment Part Frequency Display Reading on Digital Voltmeter
Confirmation 153 kHz
L4 279 kHz
LW TRACKING ADJUSTMENT (CFD-S350L)
Adjust for a maximum reading on level meter
L3-2
CT5
FM IF ADJUSTMENT
Adjust for a minimum reading on level meter
T2
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L2 108 MHz
Confirmation 87.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
CT1
Adjustment and Connecting Location:
TUNER and MAIN board (See page 16)
CFD-S350/S350L
450 kHz
1.0 ± 0.05 V
4.8 ± 0.7 V
621 kHz
1,404 kHz
Reading on Digital Voltmeter
0.9 ± 0.4 V
5.2 ± 0.5 V
621 kHz
1,404 kHz
0.6 ± 0.05 V
5.3 ± 0.5 V
162 kHz
261 kHz
10.7 MHz
3.0 ± 0.2 V
1.3 ± 0.3 V
87.5 MHz
108 MHz
15