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ICF-SW7600GR
SERVICE MANUAL US Model
Canadian Model
Ver 1.0 2001. 03
AEP Model
Chinese Model
E Model
Tourist Model




SPECIFICATIONS
Circuit system FM: Super heterodyne
AM: Dual conversion super heterodyne
Frequency range FM: 76­108 MHz
SW: 1 621­ 29 999 kHz
MW: 530­1 620 kHz
LW: 150­529 kHz
Output LINE OUT jack (stereo minijack) × 1
Recording output level approx. 245 mV, output
impedance less than 10 k
i (headphones) jack (stereo minijack) × 1 16
Speaker Approx. 77 mm diameter, 8 × 1
Maximum output 380 mW (at 10 % harmonic distortion)
Power requirements DC 6 V, four R6 (size AA) batteries
External power source DC IN 6V (except Chinese)
Dimensions Approx. 190 × 118.8 × 35.3 mm incl. projecting parts
(w/h/d)
Mass Approx. 536 g
Approx. 608 g (incl. four R6 (size AA) batteries)
Supplied accessories
Carrying case (1)
Compact antenna AN-71 (1)
Wave Handbook (1)

Design and specifications are subject to change without notice.




FM STEREO/SW/MW/LW
PLL SYNTHESIZED RECEIVER
9-873-099-11 Sony Corporation
2001C1600-1 Audio Entertainment Group
© 2001.3 General Engineering Dept.



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ICF-SW7600GR

TABLE OF CONTENTS

1. GENERAL ··································································· 3

2. DISASSEMBLY
2-1. Cabinet (Rear) ································································· 6

3. ELECTRICAL ADJUSTMENTS ······························ 6

4. DIAGRAMS
4-1. Block Diagram ······························································· 9
4-2. Printed Wiring Board
­ Main Board (Conductor Side) ­ ································ 10
4-3. Printed Wiring Board
­ Main Board (Component Side) ­ ······························ 11
4-4. Schematic Diagram ­ Main Board (1/2) ­ ··················· 12
4-5. Schematic Diagram ­ Main Board (2/2) ­ ··················· 13
4-6. Printed Wiring Board ­ KEY Board ­ ························· 14
4-7. Schematic Diagram ­ KEY Board ­ ···························· 15
4-8. IC Pin Function Description ········································ 16

5. EXPLODED VIEWS
5-1. Cabinet Section ···························································· 17
5-2. Chassis Section ···························································· 18

6. ELECTRICAL PARTS LIST ··································· 19




SAFETY-RELATED COMPONENT WARNING!! ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES
MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
PUBLISHED BY SONY. DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.


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ICF-SW7600GR
SECTION 1
GENERAL This section is extracted from
instruction manual.




Front Rear




1 AM EXT ANT (AM 6 DC IN 6V ! qa SSB FINE TUNE control (26)
external antenna) jack (35) (external power input) qs LSB/USB selector (26, 27)
2 ATT (attenuator) control jack (10)
qd AM MODE selector (26, 27)
(21) 7 LIGHT button
When the display is qf TONE selector (33)
3 ATT (attenuator) ON/
OFF switch (21) difficult to see, press this qg VOLUME control
button to light up the
4 LINE OUT (recording display for approximately qh Telescopic antenna
output) jack (33) 10 seconds. Pressing the Always pull out the base of the antenna before use.
button again while the Furthermore, do not use unnecessary force when storing the
5 2 (headphones) jack (17, antenna. At this time, be sure to push in the base as well.
33) light is on will turn off the
You can enjoy FM stereo light. Performing button
broadcasting by operations while the light
connecting the optional is on will extend the
stereo headphones to the lighting time. Base
unit . When using 8 Display (7)
headphones, sound from
the speaker will be 9 Controls (6)
muted. 0 Speaker
Pull out

qj Stand




qk Battery compartment




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ICF-SW7600GR



Controls Display




1 SLEEP button (31) 0 Number buttons (15, 16, 1 TUNE indicator (16, 18) 7 SLEEP indicator (31)
22, 23, 24) Appears when a station Appears when the sleep
2 HOLD switch (32)
is tuned in. timer is in effect.
3 DIRECT button (15, 16) qa DISPLAY, EXE button
(13, 15, 16) 2 Battery indicator (9) 8 STANDBY ,
4 FM/AM button (16, 18, 20) Press to switch to clock STANDBY indicators
3 HOLD indicator (32)
5 STANDBY MEMORY, display while operating Appears when HOLD is (28, 29, 30)
TIMER STANDBY/ the radio. Press again to in effect. All buttons will Light up when the
STANDBY TIME SET return to the previous be inoperative. standby timer is set.
buttons (28, 30) display. If you do not 9 PAGE number display
press the button, the 4 (Daylight Saving
6 ENTER, LOCAL TIME Time) indicator (12) Appears constantly when
display will return to the the radio is on.
SET button (11, 22, 28) previous condition in Appears when the time
7 ERASE, DST (Daylight about 10 seconds. display is adjusted to the 0 Time/frequency display
Saving Time) button (11, Daylight Saving Time.
qs SCAN button (24)
13, 30) 5 Preset number/time
qd PAGE button (22, 24) difference display (11, 22,
8 AM BAND, WORLD
TIME button (13, 18, 20) qf MANUAL TUNE/SCAN 23)
START/STOP, STANDBY 6 SYNCLOCK
9 POWER ON/OFF button TIME SET/TIME SET (synchronous detection
buttons (11, 13, 18, 20, 28) lock) indicator (27)
Appears when
synchronous detection is
in effect.




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ICF-SW7600GR



Setting the Current Time
"0:00" flashes in the display when installing the batteries for the first time
or when the unit has been reset. Set the clock to the current time. 3 To set the daylight saving time, press DST to display
the indicator.
If daylight saving time is not used in your area, daylight saving
time is not currently in effect, or is already displayed, proceed
1 to Step 4.

4 Hold down LOCAL TIME SET and press ­?K or k?+
to set the local time.
Each time you press ­?K or k?+, the current time will decrease or
increase by a minute. To change the digits rapidly, hold down ­?K
or k?+.
Two short beeps will be heard when adjusting the time to "0:00".
2 5 Release LOCAL TIME SET.
" : " starts flashing and the clock starts
2, 4, 5 running.
3 4
This unit can display local time, which is the time for your time zone, as
well as world time, which is the time for any other area in the world.
For the calculation of the time in other areas of the world, the time
difference* between the local time and the UTC (Universal Time
Coordinated) is used (see page 14, "Time difference with UTC for each To switch to clock display while the radio is turned on
area"). To find out the correct time, set the correct time and time Press EXE. The display returns to the previous condition
difference of the area you are in.
automatically after about 10 seconds or when EXE is pressed
* This unit uses time zones to pinpoint specific areas.
again. The time display period is extended when the WORLD
1 If the radio is turned on, press POWER ON/OFF to TIME button is pressed during clock display, or when K ­ or
+ k is pressed during world time display. During clock display,
turn it off.
radio operations such as changing frequencies are not possible.
Note
The clock will not be displayed during auto scan (page 20) or
You cannot set the clock when the radio is turned on.
memory scan (page 24).
2 Hold down LOCAL TIME SET and press K ­ or + k
to choose the time difference between your local time For areas adopting the daylight saving time (summer time)
and the UTC. Press DST to display the indicator if you are now in the
TIME ZONE indicator will appear. Each time you press K ­ or summer time period. When the summer time period has ended,
+ k, the time difference (UTC + or ­) and press DST to clear the indicator. The time display will be
the "hour" of the clock will increase or adjusted automatically.
decrease accordingly.
Two short beeps will be heard when
adjusting the time difference to ±0. Tips
When you release LOCAL TIME SET, the · The clock is displayed in the 24 hour system.
TIME ZONE indicator will disappear and the time difference with · Press LOCAL TIME SET to stop the flashing of "0:00".
UTC will be determined. · To adjust the time to the second, release LOCAL TIME SET at the time
of the tone.




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ICF-SW7600GR
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.

2-1. CABINET (REAR)



2 Two screws (+BTP 3 × 25) 1 Three screws (+BTP 3 × 25)




4 Cabinet (rear)




3 Four claws




SECTION 3
ELECTRICAL ADJUSTMENTS
· AM Section (1) AM / FM VCO Check and Adjustment
Setting:
ATT switch : OFF
AM RF signal
generator TONE switch : MUSIC
AM MODE switch : NORM
Put the lead-wire
antenna close to
the set. Procedure:
1. Connect digital voltmeter to the TP VT.
2. Tune the set to AM 150kHz.
30% amplitude
3. Confirm that the reading on the digital voltmeter becomes in
modulation by
400Hz signal
more than 2.2V.
output level: as low as possible 4. Tune the set to AM 29999kHz.
5. Confirm that the reading on the digital voltmeter becomes in
less than 13V.
6. Tune the set to FM 108.00MHz.
· FM Section 7. Confirm that the reading on the digital voltmeter becomes in
less than 13V.
FM RF signal 8. IF the value is more than 13V, adjust T202 so that the reading
generator
on the digital voltmeter becomes in 12.5V.
FM RF IN

Adjustment Location: MAIN board (See page 8)

set
22.5kHz frequency (2) 1st IF Adjustment
deviation by 400Hz signal Setting :
output level: as low as possible ATT switch : OFF
TONE switch : MUSIC
level meter AM MODE switch : NORM

16 Procedure:
1. Set the frequencies of the AM RF signal generator and the
set frequency display of the set to AM 150kHz.
2. Adjust T104 and T105 so that the reading on level meter
i headphones jack (J202)
becomes in maximum.

Adjustment Location: MAIN board (See page 8)


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(3) 2nd Local Adjustment (6) Just Tune Adjustment
Setting: Setting :
ATT switch : OFF ATT switch : OFF
TONE switch : MUSIC TONE switch : MUSIC
AM MODE switch : NORM (FM RF signal generator)
Frequency : 93.025MHz
Procedure: Moduration : 22.5kHz
1. Connect frequency counter to the TP OSC2 through the high Output level : 54dB
input impedance amplifier.
2. Tune the set to AM 150kHz. Procedure:
3. Adjust CT202 so that the reading on the frequency counter 1. Connect an oscilloscope to the TP SD.
becomes in 55.39000MHz±30Hz.(55.38997 to 55.39003MHz) 2. Tune the set to FM 93.00MHz.
3. Adjust RV202 so that the waveform on the oscilloscope satisfy
Adjustment Location: MAIN board (See page 8) as shown the figure.


(4) FM Tracking Adjustment Center
Setting:
ATT switch : OFF NG NG NG OK
TONE switch : MUSIC
Adjustment Location: MAIN board (See page 8)
Procedure:
1. Set the frequency of the FM RF signal generator and the
frequency display of the set to FM 108.00MHz.
(7) SSB 0 Beat Adjustment
2. Adjust CT101 and CT102 so that the reading on level meter
Setting :
becomes in maximum.
ATT switch : OFF
3. Set the frequency of the FM RF and the frequency display of
TONE switch : MUSIC
the set to FM 76.00MHz.
(AM RF signal generator)
4. Adjust T101 and T102 so that the reading on level meter
Frequency : AM 150kHz
becomes in maximum.
Moduration : None
5. Repeat the above steps 1 to 4 several times.
Output level : 44dB
Adjustment Location: MAIN board (See page 8)
Procedure:
1. Connect an oscilloscope to the TP DET.
2. Tune the set to AM 150kHz.
(5) 76kHz (MPX) Adjustment
3. Set the AM MODE switch to SYNC.
Setting:
4. Set the SYNC switch to USB.
ATT switch : OFF
5. Adjust CT201 so that the waveform on the oscilloscope is
TONE switch : MUSIC
minimized.
6. Set the SYNC switch to LSB.
Procedure:
7. Adjust CT201 so that the waveform on the oscilloscope is
1. Insert Headphones plug into headphones jack (J202) (for VCO
minimized.
operation).
8. Repeat the above steps 4 to 7 several times.
2. Connect a capacitor (10µF) between IC202 pin1 and GND.
9. Set the AM MODE switch to SSB.
3. Connect frequency counter to the TP 76K (VCO) through the
10. Confirm that the beat sound is changed by turning the
high input impedance amplifier.
SSB FINE TUNE control.
4. Tune the set to FM 108.00MHz.
5. Adjust RV203 so that the reading on the frequency counter
Adjustment Location: MAIN board (See page 8)
becomes in 76kHz±300Hz.
6. Remove the headphones plug.

Adjustment Location: MAIN board (See page 8)




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ICF-SW7600GR


Adjustment Location :
[MAIN BOARD] -- Component Side --


FM TRACKING
Adjustment T202
(108MHz) FM
1st IF
VCO
Adjustment
CT101 CT102 Adjustment
T104 T105
RV202
JUST TUNE
Adjustment




RV203
76kHz
(MPX)
Adjustment
IC201




T101 T102 CT202 CT201
2nd LOCAL SSB
FM TRACKING Adjustment 0 BEAT
Adjustment Adjustment
(76MHz)




[MAIN BOARD] -- Conductor Side --


2C 2E C
E
CT102 S
CF201 15 16 T103
T102 D G A
G
S T101 C135
RV202 IC201 D CT101 A
T202
K
CF203 B
K C G
CT201




S
B E D
X201 A C A
E A K
CF204 T107
B K
C C209 C1
RV203 E C152
E E
C CN201
CF205




B
CT202




C231 E B C 1
C C 2
E 1 30 B
B A
1E 1C
5 1B 2B K
2C 2E
2C 2B
1 E C221 C262
B 1C 1B 1 8
C C272
E
C260




IC203
1 8
C253




C261




4 5
C259
16 9
17
18




76K (VCO) SD OSC2 VT
RV204
MPX JUST 2nd AM/FM VCO
VOLUME C267
DET Adjustment TUNE LOCAL Adjustment
Adjustment Adjustment
K




SSB
0 BEAT
KA




2B 2C
E Adjustment
1B 1C
A




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ICF-SW7600GR
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM

ANT101 FM TRACKING FM TRACKING IC201
(TELESCOPIC) FM/AM FRONT-END
T101 CT101 T102 CT102 IF,DET
FM ANT FM RF CF202 CF203
10.7MHz 10.7MHz
Q104 DET 30
FM 20 FMRF FEOUT 16 13 FMIFIN FMIFOUT 11 9 FMLIMIN
RF AMP METER Q209 Q210
VT VT METER 2 FM AM
Q120
J101 CF201 HIGH CUT HIGH CUT
ATT SD
455kHz SD-OUT 26
AM EXT ANT 14 AMIFIN CF205 5 DISCRI
DISCRI AM REG Q211
(EXCEPT CH) AGC
10.7MHz Q210 MUTING
Q101 SWITCH
MUTING MUTING 19 AMIN RV202
CONTROL SD-CTRL/AGC 1
1ST IF JUST FM REG
TUNE
T104 XF101 T105 MUTING
AM MIX2 55.845MHz AM IFT1 Q205 U/L 29 S202




CERALOCK




SYNC/SSB
SYNC




AMOSC-O
ROD B BAND 15 BAND




AMOSC-I




ENV/PSN
Q107 Q111
Q109,110




FMOSC
SW + 1ST SWITCH LSB
BPF




VCO
AM MIX
BAR B RF AMP IF AMP
USB
22 23 24 7 6 8 27
Q108,121 AM REG
TO Q112-116 Q105 AGC
ATT
X201 CF204
S101 REG
AM OSC2 3.64MHz
ATT AGC CT201
55.390MHz RV201
OFF Q106 SSB
Q119 SSB (EXCEPT
ATT 0 BEAT
ON 1ST OSC VT CT202 FINE TUNE EA)
AMP Q206
ANT102 FM VCO T202
RV101 (FERRITE-ROD) BUFFER REG
FM VCO Q202 Q202 Q201 Q201 Q208
ATT Q207 2ND LOCAL SWITCH SWITCH SWITCH SWITCH SWITCH
Q116
AM/FM
LW/MW
SWITCH
RF AMP
Q117 VCOL