Sony CFS-1055 - Tuner Section Alignment and Adjustment; FM Frequency Coverage and Tracking; VCO and AM Alignment Procedures

TUNER SECTION
® Switch location
VOLUME i cess sicdias sin sie canis ore aie's mechanical center
BALANCE ...ccccecvcccccscnecs center click
BASS BOOST ....--+eseeeeeees center click
GRAPHIC EQUALIZER .-..-- center click
AM Section
FUNCTION SW: FM
AM FPF signal
generator
Put the lead-wire
antenna close to
the set.
(ea
30% amplitude modulation by 400Hz signal.
Output level : as low as possible
FUNCTION SW: FM
MONO/ST SW: STEREO (AEP, Italian model] only)
FM BF signal
gener ator
0.01 F
|—_+ telescopic
antenna
22.5kHz frequency deviation by terminal
400Hz signal.
Output level : as low as possible
phones jack
® Repeat the procedures in each adjustment several times,
and the frequency coverage and tracking adjustments should
be finally done by the trimmer capacitors.
no mark : US, Canadian, E, Australian model
( ) : AEP model
< > : Italian model
AM IF ALIGNMENT
Adjust for a maximum reading on VT VM.
455kHz (455kHz) <455kHz>
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VT VM.
520kHz (520kHz) <516kHz>
1,780kHz (1,680kHz) <1,630kHz>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
600kHz (600kHz)
1,500kHz (1,400kHz)
<600kHz>
<1,400kHz>
no mark : US, Canadian, E, Australian model
( ) : AEP model
< > : Italian model
FM FREQUENCY COVERAGE ADJUSTMENT
L2 86.5MHz (87.0MHz) <87.35MHz>
109.5MHz (108.3MHz) <108.25MHz>
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
86.5MHz (87.0MHz)
109.5MHz (108.3MHz)
<87.35MHz>
<108.25MHz>
VCO Adjustment
procedure :
FM RF signal
generator
telescopic antenna
terminal
Carrier frequency: 98MHz
Modulation : no modulation
output level: 0.032V(90dB)
1. Connect the frequency counter to @ and @ pins of ICI as
shown the figure below.
2. Turn the set to 983MHz.
3. Adjust RV! for 76 kHz +500 Hz reading on frequency counter.
frequency
counter
(TUNER BOARD]