ZS-M30 - Sony Audio Service Manual (repair manual). Page 17

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17
ZS-M30
TUNER BOARD
C27
C10
R5
JC3
C12
R28
C44
Q3
C45
C43
C51
C5
R7
R4
D2
C6
R2
R3
C7
R32
Q2
Q4
R6
C8
C46
C47
C4
L7
C54
C11
R13
C26
R14
C9
R30
D4
D8
D9
D5
R31
D6
D7
9
JW2
JW7
CT4
JW6
8
D3
L4
L2
JW10
L5
JW5
Q1
FL1
CT3
L3
CT2
JW4
JW3
JW1
+
Digital
JW4
(VT)
100K
voltmeter
SECTION 5
ELECTRICAL ADJUSTMENTS
RADIO BAND button : MW or LW
Volume : MIN
5-1.TUNER SECTION
AM Section
FM Section
RADIO BAND button : FM
Volume : MIN
Put the lead-wire
antenna close to
the supplisd MW/LW
loop  antenna.
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
telescopic
antenna
terminal
FM RF signal
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
0.01 uF
Adjustment Location : Tuner board (See page 18)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust part
Frequency display
 L5
531kHz
Confirmation
1,611kHz
reading on digital
voltmeter.
Adjustment value: 1.0V
Standaed value: 0.7 to 1.3V
5.1  to  5.9V
MW TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L 3
621kHz
CT2
1,404kHz
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust part Frequency display
CT4
 279kHz
Adjustment value: 5.4 to 6.0V
Confirmation
153kHz
 0.4 to 1.1V
Frequency Coverage Adjustment
Connect Location :
reading on digital
voltmeter
LW TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L 4
162kHz
CT3
261kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust part Frequency display
Confirmation
 87.5kHz
1.4 to 2.4V
Confirmation
108kHz
2.7 to 3.7V
reading on digital
voltmeter
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
L6
10.7MHz
FM TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
87.5MHz
CT1
108MHz
47K
level meter
set
LINE OUT
+
(SIDE B)
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