Sony ICF-SW7600GR Service Manual ▷ View online
3
ICF-SW7600GR
SECTION 1
GENERAL
This section is extracted from
instruction manual.
instruction manual.
1
AM EXT ANT (AM
external antenna) jack (35)
external antenna) jack (35)
2
ATT (attenuator) control
(21)
(21)
3
ATT (attenuator) ON/
OFF switch (21)
OFF switch (21)
4
LINE OUT (recording
output) jack (33)
output) jack (33)
5 2
(headphones) jack (17,
33)
You can enjoy FM stereo
broadcasting by
connecting the optional
stereo headphones to the
unit . When using
headphones, sound from
the speaker will be
muted.
You can enjoy FM stereo
broadcasting by
connecting the optional
stereo headphones to the
unit . When using
headphones, sound from
the speaker will be
muted.
6
DC IN 6V !
(external power input)
jack (10)
(external power input)
jack (10)
7
LIGHT button
When the display is
difficult to see, press this
button to light up the
display for approximately
10 seconds. Pressing the
button again while the
light is on will turn off the
light. Performing button
operations while the light
is on will extend the
lighting time.
When the display is
difficult to see, press this
button to light up the
display for approximately
10 seconds. Pressing the
button again while the
light is on will turn off the
light. Performing button
operations while the light
is on will extend the
lighting time.
8
Display (7)
9
Controls (6)
0
Speaker
Front
Rear
qa
SSB FINE TUNE control (26)
qs
LSB/USB selector (26, 27)
qd
AM MODE selector (26, 27)
qf
TONE selector (33)
qg
VOLUME control
qh
Telescopic antenna
Always pull out the base of the antenna before use.
Furthermore, do not use unnecessary force when storing the
antenna. At this time, be sure to push in the base as well.
Always pull out the base of the antenna before use.
Furthermore, do not use unnecessary force when storing the
antenna. At this time, be sure to push in the base as well.
qj
Stand
qk
Battery compartment
Base
Pull out
4
ICF-SW7600GR
Controls
1
SLEEP button (31)
2
HOLD switch (32)
3
DIRECT button (15, 16)
4
FM/AM button (16, 18, 20)
5
STANDBY MEMORY,
TIMER STANDBY/
STANDBY TIME SET
buttons (28, 30)
TIMER STANDBY/
STANDBY TIME SET
buttons (28, 30)
6
ENTER, LOCAL TIME
SET button (11, 22, 28)
SET button (11, 22, 28)
7
ERASE, DST (Daylight
Saving Time) button (11,
13, 30)
Saving Time) button (11,
13, 30)
8
AM BAND, WORLD
TIME button (13, 18, 20)
TIME button (13, 18, 20)
9
POWER ON/OFF button
0
Number buttons (15, 16,
22, 23, 24)
22, 23, 24)
qa
DISPLAY, EXE button
(13, 15, 16)
Press to switch to clock
display while operating
the radio. Press again to
return to the previous
display. If you do not
press the button, the
display will return to the
previous condition in
about 10 seconds.
(13, 15, 16)
Press to switch to clock
display while operating
the radio. Press again to
return to the previous
display. If you do not
press the button, the
display will return to the
previous condition in
about 10 seconds.
qs
SCAN button (24)
qd
PAGE button (22, 24)
qf
MANUAL TUNE/SCAN
START/STOP, STANDBY
TIME SET/TIME SET
buttons (11, 13, 18, 20, 28)
START/STOP, STANDBY
TIME SET/TIME SET
buttons (11, 13, 18, 20, 28)
Display
1
TUNE indicator (16, 18)
Appears when a station
is tuned in.
Appears when a station
is tuned in.
2
Battery indicator (9)
3
HOLD indicator (32)
Appears when HOLD is
in effect. All buttons will
be inoperative.
Appears when HOLD is
in effect. All buttons will
be inoperative.
4
(Daylight Saving
Time) indicator (12)
Appears when the time
display is adjusted to the
Daylight Saving Time.
Appears when the time
display is adjusted to the
Daylight Saving Time.
5
Preset number/time
difference display (11, 22,
23)
difference display (11, 22,
23)
6
SYNCLOCK
(synchronous detection
lock) indicator (27)
Appears when
synchronous detection is
in effect.
(synchronous detection
lock) indicator (27)
Appears when
synchronous detection is
in effect.
7
SLEEP indicator (31)
Appears when the sleep
timer is in effect.
Appears when the sleep
timer is in effect.
8
STANDBY
,
STANDBY
indicators
(28, 29, 30)
Light up when the
standby timer is set.
Light up when the
standby timer is set.
9
PAGE number display
Appears constantly when
the radio is on.
Appears constantly when
the radio is on.
0
Time/frequency display
5
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.
or when the unit has been reset. Set the clock to the current time.
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
area”). To find out the correct time, set the correct time and time
difference of the area you are in.
* This unit uses time zones to pinpoint specific areas.
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
area”). To find out the correct time, set the correct time and time
difference of the area you are in.
* This unit uses time zones to pinpoint specific areas.
1
If the radio is turned on, press POWER ON/OFF to
turn it off.
turn it off.
Note
You cannot set the clock when the radio is turned on.
You cannot set the clock when the radio is turned on.
2
Hold down LOCAL TIME SET and press K – or + k
to choose the time difference between your local time
and the UTC.
to choose the time difference between your local time
and the UTC.
TIME ZONE indicator will appear. Each time you press K – or
+ k, the time difference (UTC + or –) and
the “hour” of the clock will increase or
decrease accordingly.
Two short beeps will be heard when
adjusting the time difference to
the “hour” of the clock will increase or
decrease accordingly.
Two short beeps will be heard when
adjusting the time difference to
±0.
When you release LOCAL TIME SET, the
TIME ZONE indicator will disappear and the time difference with
UTC will be determined.
TIME ZONE indicator will disappear and the time difference with
UTC will be determined.
1
2
4
3
2, 4, 5
3
To set the daylight saving time, press DST to display
the
the
indicator.
If daylight saving time is not used in your area, daylight saving
time is not currently in effect, or
time is not currently in effect, or
is already displayed, proceed
to Step 4.
4
Hold down LOCAL TIME SET and press –?K or k?+
to set the local time.
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”.
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”.
5
Release LOCAL TIME SET.
“ : ” starts flashing and the clock starts
running.
running.
To switch to clock display while the radio is turned on
Press EXE. The display returns to the previous condition
automatically after about 10 seconds or when EXE is pressed
again. The time display period is extended when the WORLD
TIME button is pressed during clock display, or when K – or
+ k is pressed during world time display. During clock display,
radio operations such as changing frequencies are not possible.
The clock will not be displayed during auto scan (page 20) or
memory scan (page 24).
Press EXE. The display returns to the previous condition
automatically after about 10 seconds or when EXE is pressed
again. The time display period is extended when the WORLD
TIME button is pressed during clock display, or when K – or
+ k is pressed during world time display. During clock display,
radio operations such as changing frequencies are not possible.
The clock will not be displayed during auto scan (page 20) or
memory scan (page 24).
For areas adopting the daylight saving time (summer time)
Press DST to display the
Press DST to display the
indicator if you are now in the
summer time period. When the summer time period has ended,
press DST to clear the
press DST to clear the
indicator. The time display will be
adjusted automatically.
Tips
• The clock is displayed in the 24 hour system.
• Press LOCAL TIME SET to stop the flashing of “0:00”.
• To adjust the time to the second, release LOCAL TIME SET at the time
• The clock is displayed in the 24 hour system.
• Press LOCAL TIME SET to stop the flashing of “0:00”.
• To adjust the time to the second, release LOCAL TIME SET at the time
of the tone.
6
ICF-SW7600GR
SECTION 2
DISASSEMBLY
Note :
Follow the disassembly procedure in the numerical order given.
2-1.
CABINET (REAR)
SECTION 3
ELECTRICAL ADJUSTMENTS
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
AM RF signal
generator
generator
30% amplitude
modulation by
400Hz signal
output level: as low as possible
modulation by
400Hz signal
output level: as low as possible
i
headphones jack (J202)
level meter
set
16
Ω
• AM Section
• FM Section
(1) AM / FM VCO Check and Adjustment
Setting:
ATT switch
: OFF
TONE switch
: MUSIC
AM MODE switch : NORM
Procedure:
1.
1.
Connect digital voltmeter to the TP VT.
2.
Tune the set to AM 150kHz.
3.
Confirm that the reading on the digital voltmeter becomes in
more than 2.2V.
more than 2.2V.
4.
Tune the set to AM 29999kHz.
5.
Confirm that the reading on the digital voltmeter becomes in
less than 13V.
less than 13V.
6.
Tune the set to FM 108.00MHz.
7.
Confirm that the reading on the digital voltmeter becomes in
less than 13V.
less than 13V.
8.
IF the value is more than 13V, adjust T202 so that the reading
on the digital voltmeter becomes in 12.5V.
on the digital voltmeter becomes in 12.5V.
Adjustment Location: MAIN board (See page 8)
(2) 1st IF Adjustment
Setting :
ATT switch
: OFF
TONE switch
: MUSIC
AM MODE switch : NORM
Procedure:
1.
1.
Set the frequencies of the AM RF signal generator and the
frequency display of the set to AM 150kHz.
frequency display of the set to AM 150kHz.
2.
Adjust T104 and T105 so that the reading on level meter
becomes in maximum.
becomes in maximum.
Adjustment Location: MAIN board (See page 8)
FM RF signal
generator
generator
FM RF IN
22.5kHz frequency
deviation by 400Hz signal
output level: as low as possible
deviation by 400Hz signal
output level: as low as possible
set
1
Three screws (+BTP 3
×
25)
2
Two screws (+BTP 3
×
25)
4
Cabinet (rear)
3
Four claws