Read Sony ZS-D50 (serv.man2) Service Manual online
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TUNER SECTION
AM Section
RADIO BAND button : MW or LW
Volume : MIN
Volume : MIN
FM Section
RADIO BAND button : FM
Volume : MIN
Volume : MIN
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.
done by the trimmer capacitors.
MW/LW IF ADJUSTMENT
Adjust for a maximum reading on level meter.
CFT1
450kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust part
Frequency display
reading on digital
voltmeter.
L4
531kHz
0.65 – 1.05V
CT2
1,611kHz
5.1 – 6.1V
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3–1
621kHz
CT4
1,404kHz
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust part
Frequency display
reading on digital
voltmeter
CT3
279kHz
5.1 – 5.5V
Confirmation
153kHz
0.6 – 0.8V
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 – 2
162kHz
CT5
261kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust part
Frequency display
reading on digital
voltmeter
Confirmation
87.5MHz
1.45 – 1.85V
L2
108MHz
3.6 – 4.6V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
87.5MHz
CT1
108MHz
Frequency Coverage Adjustment
Connect Location :
[TUNER BOARD]
(SIDE B)
AM RF signal
generator
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
FM RF signal
generator
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
400Hz signal.
Output level : as low as possible
telescopic
antenna
terminal
antenna
terminal
0.01
µ
F
set
47k
Ω
+
–
–
LINE OUT
level meter
+
–
Digital
voltmeter
voltmeter
100 k
Ω
IC2
!ª
pin
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