Sony CFD-S40CP Service Manual page 14

CFD-S40CP
Ver 1.1 12001.07
0dB = 1 µV
TUNER SECTION
AM Section
Function switch : AM (US, Canadian, Korean, Taiwan)
MW or LW (AEP, UK)
Volume : MIN
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
FM Section
Function switch : FM
Volume : MIN
FM RF signal
generator
22.5kHz frequency deviation by
1kHz signal.
Output level : as low as possible
• Connecting Level Meter (FM and AM)
set
i jack
• Connecting Digital Voltmeter (FM and AM)
100 kΩ
TP (VT)
(JW17)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
14
Put the lead-wire
antenna close to
the set.
0.01µF
telescopic
antenna
terminal
level meter
(range: 0.5–5 V ac)
32 Ω
digital
voltmeter
MW/LW IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
AM (MW) FREQUENCY COVERAGE CHECK
Frequency Display
Reading on Digital voltmeter 1.0 (0.8)
Adjustment Part
AM (MW) TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 (L3)
620 kHz (621 kHz)
LW FREQUENCY COVERAGE ADJUSTMENT (AEP, UK)
Frequency Display
Reading on Digital voltmeter
Adjustment Part
LW TRACKING ADJUSTMENT (AEP, UK)
Adjust for a maximum reading on level meter.
L3
162 kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Frequency Display
Reading on Digital voltmeter
Adjustment Part
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
87.5 MHz
Adjustment Location : Main board (See page 15)
455kHz
( ): AEP, UK
530 kHz 1,710 kHz
(531 kHz) (1,611 kHz)
+ 0.7 V + 1.2 V
4.8 (5.0)
– 0.5 V – 0.6 V
<confirmation> <confirmation>
( ): AEP, UK
CT3
1,400 kHz (1,404 kHz)
153 kHz 279 kHz
+ 0.3 V
5.0 ± 0.1 V
0.7
– 0.4 V
<confirmation> L4
CT5
261 kHz
87.5 MHz 108 MHz
1.6 ± 0.4 V 4.0 ± 0.3 V
<confirmation> L2
CT1
108 MHz