Sony CFS-515L Service Manual ▷ View online
– 9 –
TUNER SECTION
0dB = 1
µ
V
• Switch location
FUNCTION switch
• • • • • • • • • • • • • • • • •
RADIO
PRESET MODE
• • • • • • • • • • • • • • • • • • • • •
MANUAL
GRAPHIC EQUALIZER
• • • • • • • •
center click
BALANCE
• • • • • • • • • • • • • • • • • • • • • • • • • • • • •
center click
VOLUME
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
MAX
MEGA BASS
• • • • • • • • • • • • • • • • • • • • • • • • •
mechanical center
MW Section
Procedure :
BAND switch
: MW (LW)
FINE TUNING control : mechanical center
SW Section
Procedure :
BAND switch
: SW
FINE TUNING control : mechanical center
FM Section
Procedure :
BAND switch
: FM
FINE TUNING control : mechanical center
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
520kHz
CT4
1,680kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
600kHz
CT3
1,400kHz
SW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L6
5.8MHz
CT6
18.4MHz
SW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
5.8MHz
CT5
18.4MHz
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L8
145kHz
CT8
300kHz
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L7
160kHz
CT7
260kHz
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2
10.7MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
64.0MHz
CT2
109.5MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
68.0MHz
CT1
102.0MHz
Adjustment Location : TUNER board (Page 10)
AM RF signal
generator
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
AM RF signal
generator
generator
telescopic
antenna
terminal
antenna
terminal
12PF
30% amplitude modulation
by 400Hz signal.
Output level : as low as possible
by 400Hz signal.
Output level : as low as possible
FM RF signal
generator
generator
telescopic
antenna
terminal
antenna
terminal
0.01
µ
F
22.5kHz frequency deviation
by 400Hz signal.
Output level : as low as possible
by 400Hz signal.
Output level : as low as possible
set
32
Ω
phones jack
level meter
– 10 –
FM VCO Adjustment
Procedure :
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 75.95kHz – 76.05kHz reading on frequency
3. Adjust RV1 for 75.95kHz – 76.05kHz reading on frequency
counter.
[TUNER BOARD] (Conductor side)
FM RF signal
generator
generator
Carrier frequency : 90MHz
Modulation : no modulation
Output level : 65dB (1.8mV)
Modulation : no modulation
Output level : 65dB (1.8mV)
telescopic
antenna
terminal
antenna
terminal
set
0.01
µ
F
L7 : LW Tracking Adjustment
L4 : MW Frequency
Coverage Adjustment
Coverage Adjustment
CT5 :
L5 :
SW Tracking
Adjustment
Adjustment
CT7 : LW Tracking Adjustment
L3 : MW Tracking Adjustment
CT3 : MW Tracking Adjustment
L1 : FM Tracking Adjustment
CT1 : FM Tracking Adjustment
L6 :
SW Frequency
Coverage Adjustment
Coverage Adjustment
CT6 :
L8 :
CT8 :
T2 : FM IF Adjustment
T1 : AM IF Adjustment
RV1 : FM VCO Adjustment
L2 : FM Frequency
Coverage Adjustment
Coverage Adjustment
CT2 : FM Frequency
Coverage Adjustment
Coverage Adjustment
CT4 : MW Frequency Coverage
Adjustment
Adjustment
(Component side)
[TUNER BOARD]
LW Frequency
Coverage Adjustment
Coverage Adjustment
Adjustment Location : Tuner board
frequency counter
1
µ
F
33k
Ω
– 11 –
– 13 –
– 12 –
• Signal path.
F
: FM
E
: PB (L-CH)
d
: PB (R-CH)
a
: REC (L-CH)
G
: REC (R-CH)
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM
CFS-515L
– 14 –
CFS-515L
r
Circuit Boards Location
POWER (AC) board
POWER (DC) board
BATT (+) board
BATT (–) board
TUNER board
REC SW board
MAIN board
VOL board
ECM board
D417
H-10
D418
H-10
D419
H-10
D420
H-10
IC101
F-7
IC201
D-7
IC301
E-9
IC302
G-10
Q101
F-11
Q201
F-10
Q301
G-7
Q302
H-9
Q303
C-8
Q304
C-8
Q305
F-10
Q306
D-8
Q307
G-9
Q401
H-11
Q402
H-11
D301
H-7
D302
G-7
D303
G-8
D304
D-8
D305
G-8
D306
G-7
D401
F-11
D402
G-11
D403
F-11
D404
F-11
D405
G-11
D406
F-11
D407
F-11
D408
G-11
D409
F-11
D410
F-11
D411
G-11
D412
F-11
D413
F-11
D414
G-11
D415
F-11
D416
H-10
Ref. No.
Location
r
Semiconductor Location
Ref. No.
Location
Note on Schematic Diagram:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
¢
: internal component.
•
2
: nonflammable resistor.
Note:
The components identified by mark
!
or dotted
line with mark
!
are critical for safety.
Replace only with part number specified.
•
U
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 9V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : PLAY
(
no mark : PLAY
(
) : REC
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FM
E
: PB (L-CH)
d
: PB (R-CH)
a
: REC (L-CH)
G
: REC (R-CH)
Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
•
p
: parts mounted on the conductor side.
• b
: Pattern from the side which enables seeing.
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