Sony ICF-S10MK2 (serv.man2) Service Manual ▷ View online
ICF-S10MK2
5
3-3.
KNOB (TUNING)
3-4.
MAIN BOARD
6
ICF-S10MK2
SECTION 4
ELECTRICAL ADJUSTMENTS
0 dB=1
µ
V
[AM]
Setting:
BAND switch : AM
BAND switch : AM
[FM]
Setting:
BAND switch : FM
BAND switch : FM
• Repeat the procedures in each adjustment several times for a
maximum reading on level meter, and the frequency coverage
and tracking adjustment should be finally done by the trimmer
capacitors.
and tracking adjustment should be finally done by the trimmer
capacitors.
Adjustment Location:
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
+
–
–
level meter
set
16
Ω
v
jack (J1)
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
deviation by 400 Hz
signal
Output level: as low as possible
+
–
–
level meter
v
jack (J1)
set
16
Ω
0.01
µ
F
TP (FM ANT)
– MAIN BOARD (Component Side) –
CT1
}
AM Tracking
L1
Adjustment
T1
AM IF
Adjustment
L3
}
FM Tracking
CT2
Adjustment
CT4
}
AM Frequency Coverage
L4
Adjustment
L2
}
FM Frequency Coverage
CT3
Adjustment
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
455 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L4
520 kHz
CT4
1,650 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
620 kHz
CT1
1,400 kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L2
86.5 MHz
CT3
109.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3
87.5 MHz
CT2
108 MHz
ICF-S10MK2
7
7
SECTION 5
DIAGRAMS
5-1.
BLOCK DIAGRAM
13
10
15
18
11
6
8
FM
FRONT-END
FM
IF AMP
AF
POWER AMP
AM IF AMP,
AGC, DET
AM
FRONT-END
17
20
FM
RF IN
RF IN
FM/AM
IF OUT
CF2
10.7MHz
CF1
455kHz
CF3
10.7MHz
FM
RF
RF
FM IF IN
3
FM
DISCRIMINATOR
TUNING METER
FM DISCRI
28
AF
OUT
SP1
AF
IN
IN
24
25
DET
OUT
AM IF IN
METER
16
FM/AM
BAND
SELECT
REG OUT
VOL
5
AM OSC
L4
AM OSC
L3
FM RF
L2
FM OSC
L1
AM FERRITE-ROD
ANTENNA
FM OSC
AM
RF IN
RF IN
FM/AM FRONT-END,
FM/AM IF AMP, DET, AGC, AF AMP
IC1
CT1
+
+
CT4, L4
AM FREQUENCY
COVERAGE
CT3, L2
FM FREQUENCY
COVERAGE
CT1, L1
AM TRACKING
CT2, L3
FM TRACKING
T1
AM IF
• SIGNAL PATH
: FM
: AM
9
J1
B+ (1.25V)
D1
TUNE
RV1-1
VOL
CV1
TUNING
AM
FM
SW1
BAND
CT2
CT3
CV1-3
CV1-3
CT4
CV1-4
VCC 27
v
ANT1
CV1-2
DRY BATTERY
SIZE “AA”
(IEC DESIGNATION R6)
2PCS. 3V
RV1-2
OFF
CV1
TUNING
ICF-S10MK2
8
8
R8
R1
C8
C5
R6
C7
C18
MAIN BOARD
C1
C6
C10
C9
C12
C23
C21
C4
+
+
C11
R7
R3
R4
R2
C14
C13
C3
C2
L2
R5
C15
+
C24
+
C20
C22
+
C19
+
+
C17
+
C16
+
CF1
T1
SW1
BAND
SW1
FM
AM
L4
R10
VOL
RV1 (1/2)
OFF
RV1 (2/2)
CF2
CF3
TUNE
D1
L3
L5
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
2PCS. 3V
SP1
+
–
J1
v
(11)
11
1-662-703-
CT4
CV1-4
CV1-3
CV1-2
CV1-1
CT1
CT3
CT2
TUNING
CV1
ANT1
L1
AM FERRITE-ROD ANTENNA
IC1
A
B
C
D
E
F
1
2
3
4
5
6
7
1
30
15
16
TP
(FM ANT)
Note on Printed Wiring Board:
•
•
X
: parts extracted from the component side.
•
W
: indicates side identified with part number.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
5-2.
NOTE FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in
• 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.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground in
no-signal (detuned) conditions.
no mark : FM
(
no mark : FM
(
) : AM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path.
F
: FM
f
: AM
5-3.
PRINTED WIRING BOARD
• IC Block Diagram
IC1
CXA1019S
1
2
3
4
5
6
7
8
9
10
15
14
13
12
11
FM
DISCRIMINATOR
AF POWER AMP
AM FE
FM IF
TUNING
METER
AM IF DET AGC
FM FE
23
22
21
20
24
25
19
18 17 16
29 28 27 26
30
GND
GND
AF OUT
VCC
RIPPLE
FIL
TER
AF IN
DET OUT
AFC AGC
AFC AGC
IF GND
METER
N.C
FM IF IN
AM IF IN
FM/AM BAND
SELECT
FM/AM
IF OUT
FE GND
N.C
AM RF IN
FM RF
REG OUT
FM OSC
FM RF IN
AFC
AM OSC
VOL
NF
FM DISCRI
GND
GND
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