Electrical Adjustments; Tuner Section - Sony ZS-D10 Service Manual

ZS-D10
PRECAUTION
1. Setting
MEGA BASS : OFF

TUNER SECTION

[AM (MW/LW) ]
Setting:
Function: RADIO
Band: AM (US, CND)
MW or LW (AEP, UK, IT, EE)
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: FM
TUNER board
FM RF signal
TP (ANT)
generator
0.01 µ F
75 kHz frequency
deviation by 1 kHz
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.
16
SECTION 5

ELECTRICAL ADJUSTMENTS

0 dB=1 µV
JACK board
CNP392 pin 1
level meter
3.2 Ω
+
set
–
JACK board
CNP392 pin 2
JACK board
CNP392 pin 1
level meter
3.2 Ω
+
set
–
JACK board
CNP392 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, CND)
Adjustment Part Frequency Display Reading on Digital Voltmeter
L4 530 kHz
Confirmation 1,710 kHz
AM TRACKING ADJUSTMENT (US, CND)
Adjust for a maximum reading on level meter
L3
CT3
MW VCO VOLTAGE ADJUSTMENT (AEP, UK, IT, EE)
Frequency Display
531 kHz
1,611 kHz
MW TRACKING ADJUSTMENT (AEP, UK, IT, EE)
Adjust for a maximum reading on level meter
L3-1
CT3
LW VCO VOLTAGE ADJUSTMENT (AEP, UK, IT, EE)
Adjustment Part Frequency Display Reading on Digital Voltmeter
L4 153 kHz
Confirmation 279 kHz
LW TRACKING ADJUSTMENT (AEP, UK, IT, EE)
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 and Connecting Location: TUNER board
450 kHz
1.0 ± 0.05 V
5.3 ± 0.7 V
620 kHz
1,400 kHz
Reading on Digital Voltmeter
0.9 ± 0.4 V
5.2 ± 0.5 V
621 kHz
1,404 kHz
0.6 ± 0.2 V
5.0 ± 0.1 V
162 kHz
261 kHz
10.7 MHz
3.0 ± 0.2 V
1.3 ± 0.3 V
87.5 MHz
108 MHz
(See page 17)