Electrical Adjustments; Tuner Section - Sony ZS-X3CP Service Manual

PRECAUTION
1. Setting
MEGA BASS control : OFF

TUNER SECTION

[AM (MW/LW) ]
Setting:
Function: RADIO
BAND/AUTO PRESET button: AM (US,Canadian)
Put the lead-wire
AM RF signal
antenna close to
generator
the set.
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
[FM]
Setting:
Function: RADIO
BAND/AUTO PRESET button: FM
TUNER board
FM RF signal
TP (ANT)
generator
0.01 µF
22.5 kHz frequency
deviation by 400 Hz
TUNER board
signal
TP (GND)
Output level:
as low as possible
TUNER board
TP (VT)
TP (GND)
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca-
pacitors.
• Remove FM antenna in FM adjustment.
SECTION 4

ELECTRICAL ADJUSTMENTS

0 dB=1 µV
MW or LW
(Except US,Canadian)
AUDIO board
CN302 pin 1
level meter
3.2 Ω
+
set
–
AUDIO board
CN302 pin 2
AUDIO board
CN302 pin 1
level meter
3.2 Ω
+
set
–
AUDIO board
CN302 pin 2
digital voltmeter
100 k Ω
AM (MW/LW) IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
AM VCO VOLTAGE ADJUSTMENT (US, Canadian)
Adjustment Part Frequency Display Reading on Digital Voltmeter
L4 530 kHz
Confirmation 1,710 kHz
AM TRACKING ADJUSTMENT (US, Canadian)
Adjust for a maximum reading on level meter
L3
CT3
MW VCO VOLTAGE ADJUSTMENT (Except US, Canadian)
Adjustment Part Frequency Display Reading on Digital Voltmeter
L4 531 kHz
Confirmation 1,629 kHz
MW TRACKING ADJUSTMENT (Except US, Canadian)
Adjust for a maximum reading on level meter
L3-1
CT3
LW TRACKING ADJUSTMENT (Except US, Canadian)
Adjust for a maximum reading on level meter
L3-2
CT5
FM IF ADJUSTMENT
Adjust for a minimum reading on level meter
T2
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L2 108 MHz
Confirmation 87.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
CT1
Adjustment Location: TUNER and AUDIO boards
(See page 16, 17)
ZS-X3CP
Ver 1.1
450 kHz
1.0 ± 0.05 V
5.3 ± 0.7 V
620 kHz
1,400 kHz
1.0 ± 0.1 V
5.3 ± 0.7 V
621 kHz
1,404 kHz
162 kHz
261 kHz
10.7 MHz
3.0 ± 0.2 V
1.3 ± 0.3 V
87.5 MHz
108 MHz
15