Sony CFD-980 Service Manual page 17
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Also See for CFD-980:
- Operating instructions manual (68 pages) ,
- Operating instructions manual (34 pages) ,
- Specifications (2 pages)
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4-3.
TUNER SECTION
• Switch Location
VOLUME
MEGA BASS : OFF
SOUND
AM SECTION
BAND : AM
Signal generator
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
FM SECTION
BAND : FM
Signal generator
FM RF signal
generator
TE
L 13942296513
75kHz (100%) amplitude modulation
by 1kHz signal.
Output level : as low as possible
set
Adjustment Location : MAIN board (Component side)
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0 dB = 1 µV
: MAX
: OFF
Put the lead-wire
antenna close to
the set.
0.01 µ F
telescopic
antenna
terminal
level meter
32k Ω
+
–
J302 (phones)
(See page 21)
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y
i
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8
• Repeat the procedures in each adjustment several times for the
maximum level meter indication.
• The frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.
Adjust for a maximum reading on level meter.
Adjust for a maximum reading on level meter.
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust part
L4
Confirmation
Adjust for a maximum reading on level meter.
Q Q
3
6 7
1 3
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust part
L2
Confirmation
Frequency Coverage Adjustment
Procedure :
[TUNER BOARD] (Component side)
u163
.
— 17 —
2 9
9 4
2 8
AM IF ALIGNMENT
CFT1
1,000kHz (999kHz)
AM TRACKING ADJUSTMENT
L3
620kHz (621kHz)
CT2
1,400kHz (1,404kHz)
Frequency display
530kHz (531kHz)
1,710kHz (1,611kHz)
FM TRACKING ADJUSTMENT
L1
1 5
0 5
8
2 9
9 4
CT1
Frequency display
108MHz
87.5MHz
m
co
9 9
( ) : AEP,UK
( ) : AEP,UK
( ) : AEP,UK
Reading on digital
voltmeter
0.85 ± 0.2V
4.8 ± 0.5V
87.5MHz
2 8
9 9
108MHz
Reading on digital
voltmeter
4.0 ± 0.2V
1.55 ± 0.2V
Digital Voltmeter
(DC range)
+
–
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