Sony ZS-D50 Service Manual page 16

TUNER SECTION
AM Section
RADIO BAND button : MW or LW
Volume : MIN
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
FM Section
RADIO BAND button : FM
Volume : MIN
FM RF signal
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
set
Adjustment Location : Tuner board (See page 17)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
MW/LW IF ADJUSTMENT
Adjust for a maximum reading on level meter.
CFT1
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust part Frequency display
L4 531kHz
CT2 1,611kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3–1
CT4
Put the lead-wire
antenna close to
the set.
0.01 µ F
telescopic
antenna
terminal
level meter
47k Ω
+
–
LINE OUT
450kHz
reading on digital
voltmeter.
0.65 – 1.05V
5.1 – 6.1V
621kHz
1,404kHz
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust part Frequency display
CT3
Confirmation
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 – 2
CT5
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust part Frequency display
Confirmation
L2
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
CT1
Frequency Coverage Adjustment
Connect Location :
[TUNER BOARD] (SIDE B)
– 16 –
reading on digital
voltmeter
279kHz 5.1 – 5.5V
153kHz 0.6 – 0.8V
162kHz
261kHz
reading on digital
voltmeter
87.5MHz 1.45 – 1.85V
108MHz 3.6 – 4.6V
87.5MHz
108MHz
Digital
voltmeter
IC2 !ª pin
+
100 k Ω
–