Read Sony CFS-1055 Service Manual online
– 8 –
TUNER SECTION
r
Switch location
VOLUME
VOLUME
• • • • • • • • • • • • • • • • • • • • • • •
mechanical center
BALANCE
• • • • • • • • • • • • • • • • • • • • •
center click
BASS BOOST
• • • • • • • • • • • • • • • • •
center click
GRAPHIC EQUALIZER
• • • • •
center click
FM RF signal
generator
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
400Hz signal.
Output level : as low as possible
telescopic
antenna
terminal
antenna
terminal
0.01
µ
F
VTVM
phones jack
32
Ω
set
+
–
r
Repeat the procedures in each adjustment several times,
and the frequency coverage and tracking adjustments should
be finally done by the trimmer capacitors.
and the frequency coverage and tracking adjustments should
be finally done by the trimmer capacitors.
AM IF ALIGNMENT
Adjust for a maximum reading on VTVM.
T1
455kHz
(455kHz)
<455kHz>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
L3
600kHz
(600kHz)
<600kHz>
CT3
1,500kHz
(1,400kHz)
<1,400kHz>
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VTVM.
L4
520kHz
(520kHz)
<516kHz>
CT4
1,780kHz
(1,680kHz)
<1,630kHz>
no mark : US, Canadian, E, Australian model
( )
: AEP model
< > : Italian model
AM Section
FUNCTION SW : FM
AM RF signal
generator
generator
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
30% amplitude modulation by 400Hz signal.
Output level : as low as possible
Output level : as low as possible
FM Section
FUNCTION SW : FM
MONO/ST SW : STEREO (AEP, Italian model only)
MONO/ST SW : STEREO (AEP, Italian model only)
no mark : US, Canadian, E, Australian model
( )
: AEP model
< > : Italian model
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VTVM.
L2
86.5MHz
(87.0MHz)
<87.35MHz>
CT2
109.5MHz
(108.3MHz)
<108.25MHz>
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
L1
86.5MHz
(87.0MHz)
<87.35MHz>
CT1
109.5MHz
(108.3MHz)
<108.25MHz>
1. Connect the frequency counter to 4 and 7 pins of IC1 as
shown the figure below.
2. Turn the set to 98MHz.
3. Adjust RV1 for 76 kHz
3. Adjust RV1 for 76 kHz
±
500 Hz reading on frequency counter.
FM RF signal
generator
generator
0.01
µ
F
Carrier frequency :
98MHz
Modulation :
no modulation
output level:
0.032V(90dB)
VCO Adjustment
procedure :
procedure :
Set
33k
Ω
1
µ
F
frequency
counter
counter
+
telescopic antenna
terminal
terminal
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