Tuner Section - Sony PHC-Z10 Service Manual

TUNER SECTION

0 dB = 1 µV
• FM Section
Setting:
BAND switch: FM
FM RF signal
generator
0.01 µF
22.5 kHz frequency
deviation by 1 kHz signal
Output level : as low as possible
• AM Section
Setting:
BAND switch: AM
AM RF signal
generator
30% amplitude
modulation by 400 Hz signal
Output level : as low as possible
• Connecting Level Meter (FM and AM)
32 Ω
set
J901 (phones)
• Connecting Digital Voltmeter (FM and AM)
100 kΩ
TP1 (VT)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
antenna terminal
set
Put the lead-wire
antenna close to
the AM loop
antenna.
level meter
(range: 0.5-5 V ac)
digital
voltmeter
FM FREQUENCY COVERAGE
Frequency Display
Reading on Digital voltmeter
Adjustment Part
FM TRACKING CHECK
Adjust for a maximum reading on level meter.
<confirmation>
87.5 MHz
Adjust for a maximum reading on level meter.
AM FREQUENCY COVERAGE
Frequency Display
Reading on Digital voltmeter
Adjustment Part
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
620 kHz
Adjustment Location: See page 14.
— 13 —
CHECK
87.5 MHz
1.65 ± 0.15V
<confirmation> <confirmation>
<confirmation>
108 MHz
AM IF ADJUSTMENT
CFT1
450 kHz
ADJUSTMENT
530 kHz
0.75 ± 0.15 V
L5 <confirmation>
CT1
1,400 kHz
108 MHz
4.0 ± 0.2 V
1,710 kHz
5.4 ± 0.2 V