Sony ICF-SW7600GR Service Manual ▷ View online
7
ICF-SW7600GR
NG
Center
NG
NG
OK
(3) 2nd Local Adjustment
Setting:
ATT switch
: OFF
TONE switch
: MUSIC
AM MODE switch : NORM
Procedure:
1.
1.
Connect frequency counter to the TP OSC2 through the high
input impedance amplifier.
input impedance amplifier.
2.
Tune the set to AM 150kHz.
3.
Adjust CT202 so that the reading on the frequency counter
becomes in 53.39000MHz
becomes in 53.39000MHz
±30Hz.(55.38997 to 55.39003MHz)
Adjustment Location: MAIN board (See page 8)
(4) FM Tracking Adjustment
Setting:
ATT switch
: OFF
TONE switch : MUSIC
Procedure:
1.
1.
Set the frequency of the FM RF signal generator and the
frequency display of the set to FM 108.00MHz.
frequency display of the set to FM 108.00MHz.
2.
Adjust CT101 and CT102 so that the reading on level meter
becomes in maximum.
becomes in maximum.
3.
Set the frequency of the FM RF and the frequency display of
the set to FM 76.00MHz.
the set to FM 76.00MHz.
4.
Adjust T101 and T102 so that the reading on level meter
becomes in maximum.
becomes in maximum.
5.
Repeat the above steps 1 to 4 several times.
Adjustment Location: MAIN board (See page 8)
(5) 76kHz (MPX) Adjustment
Setting:
ATT switch
: OFF
TONE switch : MUSIC
Procedure:
1.
1.
Insert Headphones plug into headphones jack (J202) (for VCO
operation).
operation).
2.
Connect a capacitor (10
µF) between IC202 pin1 and GND.
3.
Connect frequency counter to the TP 76K (VCO) through the
high input impedance amplifier.
high input impedance amplifier.
4.
Tune the set to FM 108.00MHz.
5.
Adjust RV203 so that the reading on the frequency counter
becomes in 76kHz
becomes in 76kHz
±300Hz.
6.
Remove the headphones plug.
Adjustment Location: MAIN board (See page 8)
(6) Just Tune Adjustment
Setting :
ATT switch
: OFF
TONE switch : MUSIC
(FM RF signal generator)
Frequency
: 93.025MHz
Moduration
: 22.5kHz
Output level : 54dB
Procedure:
1.
1.
Connect an oscilloscope to the TP SD.
2.
Tune the set to FM 93.00MHz.
3.
Adjust RV202 so that the waveform on the oscilloscope satisfy
as shown the figure.
as shown the figure.
Adjustment Location: MAIN board (See page 8)
(7) SSB 0 Beat Adjustment
Setting :
ATT switch
: OFF
TONE switch : MUSIC
(AM RF signal generator)
Frequency
: AM 150kHz
Moduration
: None
Output level : 44dB
Procedure:
1.
1.
Connect an oscilloscope to the TP DET.
2.
Tune the set to AM 150kHz.
3.
Set the AM MODE switch to SYNC.
4.
Set the SYNC switch to USB.
5.
Adjust CT201 so that the waveform on the oscilloscope is
minimized.
minimized.
6.
Set the LSB/USB switch to LSB.
7.
Adjust CT201 so that the waveform on the oscilloscope is
minimized.
minimized.
8.
Repeat the above steps 4 to 7 several times.
9.
Set the AM MODE switch to SSB.
10. Confirm that the beat sound is changed by turning the
SSB FINE TUNE control.
Adjustment Location: MAIN board (See page 8)
8
ICF-SW7600GR
Adjustment Location :
[MAIN BOARD]
— Component Side —
[MAIN BOARD]
— Conductor Side —
T104
T105
1st IF
Adjustment
T202
FM
VCO
Adjustment
IC201
RV202
JUST TUNE
Adjustment
CT101
CT102
FM TRACKING
Adjustment
(108MHz)
T101
T102
FM TRACKING
Adjustment
(76MHz)
CT202
2nd LOCAL
Adjustment
CT201
SSB
0 BEAT
Adjustment
RV203
76kHz
(MPX)
(MPX)
Adjustment
RV204
VOLUME
RV203
C231
C272
C262
C1
C135
C221
C259
C209
CF205
CT201
CF204
CF203
C267
C253
C261
C260
RV202
X201
CT202
C152
CT102
T102
T202
CT101
T107
CF201
15
1
1
8
9
16
16
30
1
17
18
2
CN201
IC203
IC201
T101
T103
2C
2E
2C
2C
1E
1B
1B
1B
2E
E
2B
2B
1C
1C
2C
1B
E
2B
1C
A
K
K
A
C
B
E
C
B
E
C
B
E
1
1
4
5
8
5
S
D
G
S
S
D
D
G
G
B
B
B
E
E
E
C
C
C
B
E
C
K
K
A
A
K
A
A
A
K
K
C
E
B
A
E
C
VT
AM/FM VCO
Adjustment
OSC2
2nd
LOCAL
Adjustment
SD
JUST
TUNE
Adjustment
76K (VCO)
MPX
Adjustment
DET
SSB
SSB
0 BEAT
Adjustment
9
9
ICF-SW7600GR
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM
20
19
15
16
13
14
5
11
9
22
23
1
9
10
8
1
16
7
10
9
4
13
14
4
24
7
6
8
27
26
1
29
2
30
+
2
1
53
14
56
55
5
6
8
50
1
51
1
23
3
2
7
2
2
2
25
24
52
19
20
54
21
16
17
15
Q112,113
ATT
Q105
ATT
Q205
BAND
SWITCH
Q209
FM
HIGH CUT
Q210
AM
HIGH CUT
Q202
SWITCH
Q203
MUTING
Q211
MUTING
Q214
LINE AMP
Q213
LINE AMP
Q215
MUTING
Q224
B+ SWITCH
Q222,225
B+ SWITCH
Q202
SWITCH
Q223
SWITCH
Q201
SWITCH
Q201
SWITCH
Q208
SWITCH
Q210
SWITCH
Q101
MUTING
CONTROL
Q101
MUTING
CONTROL
Q120
ATT
Q106
ATT
Q114,115
AGC
Q302
CURRENT REG
Q303,306
PLL LPF
Q301
LED DRIVE
Q108,121
AGC
Q109,110
AM MIX
Q111
1ST
IF AMP
Q116
LW/MW
RF AMP
RF AMP
Q107
SW
RF AMP
Q104
FM
RF AMP
Q119
1ST OSC
AMP
Q117
AM VCO
AMP
Q304
FM VCO
AMP
Q206
FM VCO
BUFFER
BUFFER
Q207
AM/FM
SWITCH
Q212
STEREO
CONTROL
Q220
AM/FM
B+ SWITCH
Q219
AM/FM
B+ SWITCH
Q216
DC/DC
CONVERTER
Q221
AM/FM
B+ SWITCH
Q217
AM/FM
B+ SWITCH
Q218
AM/FM
B+ SWITCH
Q305
AM/FM
B+ SWITCH
Q118
1ST OSC
VT
VT
VT
BPF
VT
REG
35
ı
49
9
ı
3
13
ı
10
31
ı
34
KEY
MATRIX
BATT
IC204
+3V REG
REG
REG
VT
ANT101
J101
AM EXT ANT
(EXCEPT CH)
ROD B
BAR B
TO Q112-116
REG
S101
RV101
ATT
ANT102
(FERRITE-ROD)
AGC
AGC
(TELESCOPIC)
T101
FM ANT
CT101
FM TRACKING
FM TRACKING
T102
FM RF
CT102
MUTING
VCOL
VCOH
AM REG
AM REG
T104
AM MIX2
XF101
55.845MHz
T105
AM IFT1
1ST IF
AM REG
T202
FM VCO
X201
AM OSC2
55.390MHz
CT202
2ND LOCAL
CT201
SSB
0 BEAT
RV201
SSB
FINE TUNE
S201
AM MODE
MUTING
MUTING
FMRF
AMIN
BAND
FMOSC
AMOSC-I
AMOSC-O
CERALOCK
SYNC/SSB
VCO
ENV/PSN
DET
METER
SD-OUT
SD-CTRL/AGC
U/L
FEOUT
FMIFOUT
FMIFIN
AMIFIN
FMLIMIN
DISCRI
CF202
10.7MHz
CF201
455kHz
CF203
10.7MHz
CF205
DISCRI
10.7MHz
METER
SD
AGC
RV202
JUST
TUNE
S202
SYNC
MUTING
FM REG
AM REG
RV203
76k(MPX)
IN
VCO
IN2 L
IN1 R
NF2
NF1
VOL
L
R
STOP
IC202
PLL FM MPX
IC203
PRE/POWER AMP
OUT2
OUT1
VCC
S203
TONE
RV204
VOLUMEw
J201
LINE OUT
SP201
(SPEAKER)
J202
(HEADPHONES)
J203
BEEP
MUTING
IC302
DIGITAL TUNING SYSTEM CONTROL
X301
75kHz
S301 - 323
S325 - 328
S325 - 328
S329
HOLD .
BATT
IC303
IC304
IC305
3.5V DET
3.1V DET
3.0V REG
IC301
EEPROM
VDD
VDD
SDA
SCK
XIN
XOUT
KS0-6
KR0-3
HOLD
SI/SO
SCK
VDET
CE
LCD0-14
COM0-3
LIGHT
MUTING
BEEP
SD
METER
MUTING
BEEP
SD
METER
EO
VCOL
VCOH
VCOL
VCOH
AM/FM
BAR/ROD
POWER
+13V
+13V
AM B
ROD B
BAR B
FM REG
AM REG
LCD1
LIQUID CRYSTAL DISPLAY
D301(BACK LIGHT)
IC201
FM/AM FRONT-END
IF,DET
DRY BATTERY
SIZE"AA"
(IEC DESIGNATION R6)
4PCS,6V
EXCEPT CH
(EXCEPT
EA)
CF204
3.64MHz
OFF
ON
ATT
• Abbreviation
CH: Chinese model
EA: Saudi Arabia model
EA: Saudi Arabia model
LSB
USB
NEWS
MUSIC
– SSB SYNC NORM –
HOLD
FREE
: FM
: MW/LW
• Signal Path
: SW
DC IN 6V
10
10
ICF-SW7600GR
4-2. PRINTED WIRING BOARD – MAIN BOARD (CONDUCTOR SIDE) –
Ref. No.
Location
• Semiconductor Location
Ref. No.
Location
1
2
A
B
C
D
E
F
G
H
I
3
4
5
6
7
8
9
10
11
12
13
14
IC202
IC204
IC203
IC201
A
TO
KEY BOARD
MAIN BOARD
(CONDUCTOR SIDE)
1-679-368-
11
(11)
RV201
SSB FINE
TUNE
EXCEPT EA
RV101
ATT
J201
LINE OUT
RV204
VOLUMEw
S202
SYNC
USB
LSB
S203
TONE
MUSIC
NEWS
S101
ATT
ON
OFF
UNPLUGGED
PLUGGED
S201
AM MODE
SSB
SYNC
NORM
CH
CH
CH
RV203
C231
C272
C262
C128
C146
C157
C150
C121
C245
C274
C135
C221
C259
C209
CF205
CT201
CF204
CF203
CF202
C267
C253
C261
C260
RV202
(SPEAKER)
X201
CT202
C152
CT102
T102
T202
CT101
T106
ORG
GRN
BLK
PNK
T107
CF201
15
1
1
8
9
16
16
30
XF101
1
17
18
2
CN201
T203
T203
T101
T103
T104
T105
1C
2E
2B
2B
1E
1B
2C
1C
1C
2C
2E
2B
2B
2B
E
1B
1E
1B
2C
1C
2E
2B
2B
1E
1B
2C
1C
2E
2B
2B
1E
1B
2C
2C
1E
1B
1B
2E
2B
1C
2C
2C
1E
1B
1B
1B
2E
E
2B
2B
1C
1C
2C
1B
E
2B
1C
AK
K
A
C
B
E
C
C
B
B
E
E
C
B
E
C
B
E
1
1
4
5
8
5
6
10
S
S
D
B
D
G
G
S
D
G
S
S
S
D
D
D
G
G
G
B
B
B
E
E
E
C
C
C
B
E
C
K
K
A
A
K
A
A
A
K
K
B
E
C
E
B
C
C
C
C
C
C
C
E
E
E
E
E
E
B
B
B
B
B
C
E
B
K
K
K
B
B
B
E
E
C
C
A
A
K
K
B
B
B
E
E
B
E
B
E
C
C
B
E
C
C
C
B
E
E
C
C
G
D
S
K
A
A
A
A
A
K
K
K
K
SP201
SPEAKER
8
Ω
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
4PCS. 6V
DC IN 6V
J203
J202
J101
AM EXT ANT
ANT101
FM/SW
TELESCOPIC
ANTENNA
ANT102
MW/LW
MW/LW
FERRITE-ROD
ANTENNA
A
A
A
E
C
K
A
TP
OSC2
TP
SD
TP
VT
VT
TP
DET
TP
76K(VCO)
Ref. No.
Location
Ref. No.
Location
Ref. No.
Location
Ref. No.
Location
D101
D-8
D102
D-7
D103
E-12
D104
E-14
D105
D-10
D106
C-10
D107
D-10
D108
D-10
D109
E-9
Ref. No.
Location
Ref. No.
Location
D110
E-13
D111
E-8
D201
D-7
D202
I-3
D203
H-3
D204
H-14
D205
H-13
D206
F-6
D207
I-14
IC201
D-5
IC202
F-2
IC203
F-5
IC204
G-3
Q101
E-8
Q104
D-7
Q105
D-12
Q106
D-13
Q107
E-11
Q108
C-10
Q109
C-9
Q110
D-9
Q111
C-7
Q112
D-13
Q113
D-13
Q114
D-12
Q115
D-12
Q116
C-13
Q117
E-10
Q118
D-10
Q119
D-9
Q120
D-12
Q121
C-11
Q201
C-3
Q202
C-3
Q203
E-4
Q204
D-2
Q205
C-5
Q206
E-7
Q207
E-7
Q208
E-6
Q209
E-3
Q210
F-3
Q211
F-3
Q212
F-2
Q213
F-13
Q214
F-13
Q215
H-2
Q216
H-3
Q217
F-10
Q218
F-10
Q219
F-11
Q220
F-11
Q221
F-11
Q222
F-12
Q223
F-11
Q224
F-12
Q225
F-12
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
•
• X : parts extracted from the component side.
•
a
: Through hole.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side)
the parts face are indicated.
• Abbreviation
CH
: Chinese model.
EA
: Saudi Arabia model.
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