Sony ZS-M7 Service Manual page 37

TUNER SECTION
AM Section
Function switch :
AM
MW (LW) : EXCEPT US Model
Volume : MIN
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
FM Section
Function switch : FM
Volume : MIN
FM RF signal
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
set
J301 (phones)
Connect and Adjustment Location : Tuner board (See page 38)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM <MW/LW> IF ADJUSTMENT
Adjust for a maximum reading on level meter.
CFT1
AM <MW> FREQUENCY COVERAGE ADJUSTMENT
Adjust part Frequency display
L2 530kHz
< L4 > < 531kHz >
Confirmation 1.710kHz
< CT2 > < 1.611kHz >
AM <MW> TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
CT1
< CT3 >
L1
< L3 >
: US Model
Put the lead-wire
antenna close to
the set.
0.01 F
telescopic
antenna
terminal
level meter
32
+
–
< > : EXCEPT US model
450kHz
reading on digital
voltmeter.
0.9 – 1.1V
< 0.8 – 1.0V >
5.2 – 5.6V
< 5.2 – 5.6V >
620kHz
< 621kHz >
1.400kHz
< 1.404kHz >
EXCEPT US model
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
L10
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust part Frequency display
Confirmation
CT4
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
CT5
[TUNER BOARD] (SIDE B)
US Model
EXCEPT US Model
– 37 –
10.7MHz
reading on digital
voltmeter
153kHz 0.6 – 0.8V
297kHz 5.1 – 5.5V
162kHz
261kHz
100 k
TP (VT)
VT
100 k
TP (VT)
VT
Digital
voltmeter
+
–
Digital
voltmeter
+
–