CFD-575, CFD-577 - Sony Audio Service Manual (repair manual). Page 9

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– 9 –
 TUNER  SECTION
• Switch location
FUNCTION
: RADIO
VOLUME
: MAX
MEGA BASS
: mechanical center
ROTARY  EQUALIZER : center click
 AM Section
BAND : AM
 FM Section
BAND : FM
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM IF ALIGNMENT
Adjust for a maximum reading on level meter.
CFT1
455kHz
AM FREQUENCY COVERAGE  ADJUSTMENT
Adjust part
Frequency display
Reading on digital
voltmeter.
Confirmation
530kHz
0.9 ± 0.2V
L4
1,710kHz
5.6 ± 0.2V
AM TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
620kHz
CT2
1,400kHz
FM FREQUENCY COVERAGE  ADJUSTMENT
Adjust part
Frequency display
Reading on digital
voltmeter.
Confirmation
87.5MHz
1.7 ± 0.2V
L2
108MHz
4.0 ± 0.2V
FM TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
87.5MHz
CT1
108MHz

Adjustment Location : MAIN board (See page 12)
Frequency Coverage Adjustment
Setting :

       [MAIN BOARD]
       (Conductor side)
AM  RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to 
the set.
FM RF signal
generator
22.5kHz frequency deviation by 400Hz signal.
Output level : as low as possible
telescopic
antenna
terminal
0.01
µ
F
set
32
Ω
+
–
J302(phones)
level meter
R3
C83
+
–
Digital voltmeter
(DC range)
3. Phase Check
Mode : Playback
4. After the adjustment, lock the screws with locking compound.
Adjustment Location :
V
H
in phase
90
°
45
°
135
°
180
°
good
wrong
set
L-CH
R-CH
screen pattern
test tape
P-4-A063
(6.3kHz, –10dB)
Osilloscope
J302 (phones)
32 
Ω
32 
Ω
Deck A
Deck B
Window (C)
cassette
Screwdriver
Window (C)
cassette

Display

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