Sony ZS-S50CP Service Manual page 13

TUNER SECTION
[AM]
Setting:
Function: RADIO
Band: AM
Put the lead-wire
AM RF signal
antenna close to
generator
the set.
set
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
[FM]
Setting:
Function: RADIO
Band: FM
TU board
FM RF signal
TP (ANT)
generator
0.01 µ F
75 kHz frequency
deviation by 1 kHz
TU board
signal
TP (GND)
Output level:
as low as possible
TU board
100 k Ω
TP (VT)
TP (GND)
• Repeat the procedures in each adjustment several times, and
the tracking adjustments should be finally done by the trimmer
capacitors.
• Remove FM antenna in FM adjustment.
0 dB=1 µV
level meter
32 Ω
+
–
JACK (HP) Board
i jack (J301)
level meter
32 Ω
+
set
–
JACK (HP) Board
i jack (J301)
digital voltmeter
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
AM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display
L4 530 kHz (531 kHz)
Confirmation 1,710 kHz (1,611 kHz)
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3
CT3
FM IF ADJUSTMENT
Adjust for a minimum reading on level meter
T2
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display
L2 108 MHz
Confirmation 87.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
CT1
Adjustment and Connecting Locations: TU board (see page 14)
ZS-S50CP
450 kHz
( ): except Mexican model
Reading on Digital Voltmeter
1.0 ± 0.3 V
5.2 ± 0.8 V (4.8 ± 0.6 V)
( ): except Mexican model
620 kHz (621 kHz)
1,400 kHz (1,404 kHz)
10.7 MHz
Reading on Digital Voltmeter
3.0 ± 0.3 V
1.3 ± 0.4 V
87.5 MHz
108 MHz
13