Electrical Adjustments; Tuner Section - Sony ZSS2IPW Service Manual

0 dB = 1 µV

TUNER SECTION

• AM Section
Setting:
RADIO BAND•AUTO PRESET button: AM
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
• FM Section
Setting:
RADIO BAND•AUTO PRESET button: FM
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz signal
output level : as low as possible
• Connecting Level Meter (FM, AM)
set
i jack (J321)
• Connecting Digital Voltmeter (FM, AM)
digital
voltmeter
100 k Ω
TP (VT)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
SECTION 4

ELECTRICAL ADJUSTMENTS

Put the lead-wire
antenna close to
the set.
ANT2
0.01 µ F
set
level meter
(range: 0.5–5 V ac)
32 Ω
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
450 kHz
AM FREQUENCY COVERAGE CHECK
Frequency Display
Reading on Digital voltmeter
Adjustment Part
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
ANT1
620 kHz
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
10.7 MHz
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: See page 16.
ZS-S2iP
T1
530 kHz 1,710 kHz
0.8 ± 0.3 V 5.8 ± 0.1 V
L3 <confirmation>
CT3
1,400 kHz
L6
87.5 MHz 108 MHz
1.5 ± 0.3 V 3.0 ± 0.2 V
<confirmation> L2
CT1
108 MHz
15