Sony WALKMAN WM-SR10 Service Manual page 9

TUNER SECTION
[AM]
BAND : AM
AM RF signal
generator
30% amplitude modulation by 400 Hz
signal.
Output level : as low as possible
[FM]
BAND : FM
FM RF signal
generator
75kHz frequency deviation by 1kHz signal.
Output level : as low as possible
16 Ω
set
2 jack (J301)
Adjustment Parts Location :
[MAIN Board] — SIDE A —
CT1-3 : FM frequency
coverage adjustment
CT1-3
CT1-2
CT1-2 : FM tracking
adjustment
0dB=1µV
Put the lead-wire
antenna close to
the set.
0.01 µ F
to ANT (FM IN)
+
–
level meter
RV601 : Tape speed adjustment
CT1-4 : AM frequency
coverage adjustment
CT1-4
CT1-1
CT1-1 : AM tracking
adjustment
• Repeat the procedures in each adjustment several times.
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
CT1-4
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
CT1-1
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CT1-3
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
CT1-2
• Abbreviation
EA : Saudi Arabia model
[MAIN Board] — SIDE B —
L4 : AM frequency
coverage adjustment
RV601
L1 : AM tracking
adjustment
WM-SR10
505 kHz (516.5 kHz)
1,680 kHz (1,631.5 kHz)
( ) : EA MODEL
621 kHz
1,404 kHz
455 kHz
86.0 MHz (87.35 MHz)
109.5 MHz (108.25 MHz)
( ) : EA MODEL
86.0 MHz (87.35 MHz)
109.5 MHz (108.25 MHz)
( ) : EA MODEL
L3 : FM frequency
coverage adjustment
T1 : AM IF
adjustment
L4
T1
L3
L2
L1
L2 : FM tracking
adjustment
9