Tuner Section - Sony CFD-V25 Service Manual

4-3.

TUNER SECTION

• Switch Location
VOLUME
MEGA BASS
PRESET SOUND MODE : OFF
AM SECTION
BAND : AM
Signal generator
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
FM SECTION
BAND : FM
Signal generator
FM RF signal
generator
75kHz (100%) amplitude modulation
by 1kHz signal.
Output level : as low as possible
set
J302 (phones)
Adjustment Location : MAIN board (Component side)
0 dB = 1 µV
: MAX
: OFF
Put the lead-wire
antenna close to
the set.
0.01 µ F
telescopic
antenna
terminal
level meter
32k Ω
+
–
(See page 13)
• Repeat the procedures in each adjustment several times for the
maximum level meter indication.
• The frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.
Adjust for a maximum reading on level meter.
T2
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CV1 (3/4)
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
CV1 (4/4)
Adjust for a maximum reading on level meter.
T1
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
CV1 (1/4)
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
CV1 (2/4)
— 12 —
AM IF ALIGNMENT
455kHz
620kHz
1,400kHz
520kHz
1,780kHz
FM IF ADJUSTMENT
10.7MHz
86.5MHz
109.5MHz
86.5MHz
109.5MHz