Frequency range:
Model for North and South America
BandICF-S79VChannel step
FM87.5 – 108 MHz 0.1 MHz
AM530 – 1,710 kHz 10 kHz
TV2 – 13 ch—
WEATHER 1 – 5 ch—
Model for other countries
Band
ICF-S79ICF-S79L
FM
87.5 – 108 MHz 87.5 – 108 MHz0.05 MHz*
AM(MW) 531 – 1,602 kHz 531 – 1,602 kHz9 kHz
LW
—153 – 279 kHz9 kHz
* The frequency display is raised or lowered by steps of
0.1 MHz. For example, both 88.00 MHz and 88.05 MHz
will be displayed as “88.0 MHz.”
Time display:
Model for North and South America: 12-hour
system
Model for other countries: 24-hour system
Speaker:
Power output:
Power requirements:
Dimensions: Approx. 143.5 x 139 x 67 mm
Mass: Approx. 523 g (1lb 2oz) incl. batteries
Supplied accessories: Suction cup (1), Strap (1)*
Design and specifications are subject to change
without notice.
1
7.7 cm (3
220 mW (at 10% harmonic distortion)
4.5 V DC, three size C (R14) batteries
(w/h/d) (Approx. 5
inches) incl. projecting parts and controls
*North and South American model only
/8 inches), 8 ohms
3
/4 x 5 1/2 x 2 3/
Channel Step
4
US Model
ICF-S79V
AEP Model
ICF-S79/S79L
UK Model
ICF-S79L
MODEL IDENTIFICATION
There are two types of ICF-S79V.
Please look at the mark of set shown below.
no mark: Original Typ
Liv: Liv Type
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
ICF-S79
FM/AM SYNTHESIZED RADIO
ICF-S79L
TV/WEATHER/FM/AM SYNTHESIZED RADIO
9-925-738-12Sony Corporation
2002B0500-1Personal Audio Company
C 2002.02Published by Sony Engineering Corporation
FM/MW/LW SYNTHESIZED RADIO
ICF-S79V
Page 2
This section is extracted from
instruction manual.
SECTION 1
GENERAL
– 2 –
Page 3
– 3 –
Page 4
SECTION 2
d
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
REAR CABINET
5
BATT lead (red)
3
two claws
5
antenna lead
4
rear cabinet
2
six screws
(BTP 3 × 25)
1
battery case li
5
BATT lead (white)
– 4 –
Page 5
SECTION 3
FM antenna
ground
(JW17)
L8
FM FREQUENCY
COVERAGE
L9
AM (MW)
FREQUENCY
COVERAGE
L5CT3
AM (MW)
TRACKING
TV TRACKING
(ICF-S79V only)
T1
TV IF
(ICF-S79V only)
L2
TV FREQUENCY
COVERAGE
(ICF-S79V only)
CT5
LW FREQUENCY
COVERAGE
(ICF-S79L only)
TV antenna
ground
(JW20)
FM/TV
antenna input
(JW18)
CT1
L1
T2
AM IF
FM
TRACKING
L6
CT4
CT2L5
LW TRA CKING
(ICF-S79L only)
MWLWL5
IC1
IC2
TP
(VT)
r
ELECTRICAL ADJUSTMENTS
0dB=1 µV
[FM/TV Section]
Setting:
BAND switch: FM1 or TV
FM RF SSG
0.01
µ
F
±
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
FM lead wire antenna terminal
[AM (LW/MW) Section]
Setting:
BAND switch: AM (MW) or LW
Put the lead-wire
AM RF SSG
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
antenna close to
the set.
set
set
speaker terminal
level meter
+
–
speaker terminal
level meter
+
–
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a reading on digital voltmeter.
L887.5 MHz (TV 2 ch)
Confirm108.0 MHz
Note: Not use the FM RF signal generator in this adjustment.
2.3 ± 0.1 V (1.0 ± 0.1 V)
8.5 ± 0.5 V (12.5 ± 0.5 V)
( ): ICF-S79V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L687.5 MHz (TV 2 ch (59.75 MHz))
CT4108.0 MHz
( ): ICF-S79V
ICF-S79L only
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a reading on digital voltmeter.
CT5153 kHz2.3 ± 0.1 V
Confirm279 kHz8.5 ± 0.5 V
Note: Not use the AM RF signal generator in this adjustment.
ICF-S79L only
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5 (LW side)162 kHz
CT2243 kHz
Adjustment and Connection Location:
[MAIN BOARD] (Component Side)
MAIN board
TP
(VT)
digital voltmete
+
–
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
ICF-S79V only
TV FREQUENCY COVERAGE ADJUSTMENT
Adjust for a reading on digital voltmeter.
L2WEATHER 2 ch1.0 ± 0.1 V
ConfirmTV 13 ch10 ± 0.5 V
Note: Not use the FM RF signal generator in this adjustment.
ICF-S79V only
TV TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1WEATHER 2 ch (162.40 MHz)
CT1TV 13 ch (215.75 MHz)
ICF-S79V only
Adjust for a maximum reading on level meter.
TV IF ADJUSTMENT
T110.7 MHz
AM (MW) FREQUENCY COVERAGE ADJUSTMENT
Adjust for a reading on digital voltmeter.
L9531 kHz (530 kHz)2.8 ± 0.1 V
Confirm1,602 kHz (1,710 kHz)9.5 ± 0.5 V
Note: Not use the AM RF signal generator in this adjustment.
AM (MW) TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5 <MW side>621 kHz (590 kHz)
CT31,395 kHz (1,490 kHz)
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2455 kHz
( ): ICF-S79V
< >: ICF-S79L
( ): ICF-S79V
[MAIN BOARD] (Conductor Side)
– 5 –
– 6 –
Page 6
ICF-S79/S79L/S79V
4-1. PRINTED WIRING BOARDS
SECTION 4
DIAGRAMS
HOW TO CHANGE THE CERAMIC FILTERS
This model is used two ceramic filters of CF1, CF3.
Y ou must use same type of color marked cer amic filters in order to
meet same specifications.
Therefore, the ceramic filter must change two pieces together since
it's supply two pieces in one package as a spare parts.
4-2. SCHEMATIC DIAGRAM (ICF-S79/S79L) • See page 11 for Waveforms and IC Block Diagrams.
ICF-S79/S79L/S79V
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
•¢ : internal component.
•: panel designation.
•
B+: B+ Line.
•: adjustment for repair.
• Power voltage is dc 4.5 V 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 : FM (TV 2 – 6 ch)
() : AM (MW)
[]: LW
W or less unless otherwise
4
• Voltages are taken with a V OM (Input impedance 10 MΩ).
V oltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
V oltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
: FM
: AM (MW/LW)
– 9 –
– 10 –
Page 8
ICF-S79/S79L/S79V
4-3. SCHEMATIC DIAGRAM (ICF-S79V) • See page 11 for Waveforms and IC Block Diagrams.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF 50
WV or less are not indicated except for electrolytics and
tantalums.
• All resistors are in Ω and 1/
specified.
•¢: internal component.
•: panel designation.
•: B+ Line.
•: adjustment f or repair.
• Power voltage is dc 4.5 V and fed with regulated dc power
supply from battery terminal.
• Voltages and wavef orms are dc with respect to ground under no-signal (detuned) conditions.
no mark : FM (TV 2 – 6 ch)
() : AM
<< >> : TV (7 – 13 ch)
W or less unless otherwise
4
• Voltages are taken with a VOM (Input impedance 10 MΩ).
V oltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
V oltage variations may be noted due to normal production
tolerances.
30VLCD2—
31 to 34COM0 to COM3O
35 to 48LCD0 to LCD13O
49LCD14O
50CEI
51INTI
52BEEPO
53VDETI
54PB1I
55PB2I
56PB3I
Initialize signal output for the destination select
Radio power on/off control signal output “H”: power on
Mute on/off control signal output “L”: mute on
Beep sound level variable output terminal Not used (open)
Not used (open)
Key strobe signal output terminal
Key return signal input terminal
Band select signal output terminal *1
Band select signal output terminal *1
Used for ICF-S79L/S79V only (ICF-S79: not used (open))
Power supply terminal for buffer amplifier
Not used (open)
Ground terminal
PLL error signal output terminal
AM (MW) or LW VCO input terminal
FM, TV or WEATHER VCO input terminal
Power supply terminal (connected to the coupling capacitor)
Power supply terminal (+2.2 V)
System clock output terminal (75 kHz)
System clock input terminal (75 kHz)
Power supply terminal (connected to the coupling capacitor)
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive
voltage
Common drive signal output to the liquid crystal display (LCD1)
Segment drive signal output to the liquid crystal display (LCD1)
Segment drive signal output terminal Not used (open)
Power failure detection signal input from the IC5 Normally: “H”
Not used (fixed at “L”)
Beep sound drive signal output terminal
Power failure detection signal input from the IC4 Normally: “H”
Initialize signal input for the destination select Fixed at “L”
Initialize signal input for the destination select
ICF-S79/S79L: initialize mode at “H”, ICF-S79V: fixed at “L”
Initialize signal input for the destination select
ICF-S79L: initialize mode at “H”, ICF-S79/S79V: fixed at “L”
*1 Band select signal
BAND1 (pin !¢)
BAND2 (pin !∞)
FM (TV L)
“L”“L”“H”“H”
“L”“H”“L”“H”
TV H/
WEATHER
AM (MW)LW
– 14 –
Page 11
SECTION 5
EXPLODED VIEW
Ver 1.2
NOTE:
• -XX and -X mean standardized parts, so they
may have some difference from the original one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑↑
Parts Color Cabinet's Color
4
2
not supplied
3
1
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
• The mechanical parts with no reference number in the exploded views are not supplied.
• Accessories and packing materials are gi ven in
the last of the electrical parts list.
IC18-759-204-01 IC TA7358P (S79V)
IC28-752-055-05 IC CXA1019S
IC38-759-255-04 IC S-81220PG-PS-T1
IC48-759-480-31 IC S-80832ANNP-EDW-T2
IC58-759-466-70 IC S-80827ANNP-EDQ-T2
R211-216-089-00 METAL CHIP47K5%1/10W
R221-216-037-00 METAL CHIP3305%1/10W
R231-216-073-00 METAL CHIP10K5%1/10W
(S79V)
R241-216-073-00 METAL CHIP10K5%1/10W
(S79V)
R251-216-073-00 METAL CHIP10K5%1/10W
R261-216-121-00 METAL CHIP1M5%1/10W
R281-216-049-11 METAL CHIP1K5%1/10W
R291-216-069-00 METAL CHIP6.8K5%1/10W
R301-216-065-00 METAL CHIP4.7K5%1/10W
(S79L)
R311-216-049-11 METAL CHIP1K5%1/10W
R321-216-021-00 METAL CHIP685%1/10W
R331-216-295-00 CONDUCTOR, CHIP (2012)
R351-216-057-00 METAL CHIP2.2K5%1/10W
R361-216-037-00 METAL CHIP3305%1/10W
R381-216-097-00 METAL CHIP100K5%1/10W
R391-216-089-00 METAL CHIP47K5%1/10W
R401-216-105-00 METAL CHIP220K5%1/10W
R411-216-049-11 METAL CHIP1K5%1/10W
R421-216-097-00 METAL CHIP100K5%1/10W
R431-216-073-00 METAL CHIP10K5%1/10W
RV11-225-550-11 RES, VAR, CARBON 50K (VOL)
< VARIABLE RESISTOR >
< TRANSFORMER >
R441-216-073-00 METAL CHIP10K5%1/10W
R451-216-097-00 METAL CHIP100K5%1/10W
R461-216-065-00 METAL CHIP4.7K5%1/10W
R471-216-073-00 METAL CHIP10K5%1/10W
(S79V)
R481-216-065-00 METAL CHIP4.7K5%1/10W
(S79V)
R491-216-121-00 METAL CHIP1M5%1/10W
R501-216-121-00 METAL CHIP1M5%1/10W
R511-216-073-00 METAL CHIP10K5%1/10W
R521-216-073-00 METAL CHIP10K5%1/10W
R531-216-069-00 METAL CHIP6.8K5%1/10W
R541-216-065-00 METAL CHIP4.7K5%1/10W
R551-216-065-00 METAL CHIP4.7K5%1/10W
R561-216-065-00 METAL CHIP4.7K5%1/10W
R571-216-065-00 METAL CHIP4.7K5%1/10W
R581-216-065-00 METAL CHIP4.7K5%1/10W
R591-216-049-11 METAL CHIP1K5%1/10W
(S79L/S79V)
R601-216-121-00 METAL CHIP1M5%1/10W
(S79L)
R611-216-097-00 METAL CHIP100K5%1/10W
R621-216-033-00 METAL CHIP2205%1/10W
R631-216-001-00 METAL CHIP105%1/10W
R641-216-073-00 METAL CHIP10K5%1/10W
R651-216-001-00 METAL CHIP105%1/10W
R661-216-049-11 METAL CHIP1K5%1/10W
R671-216-097-00 METAL CHIP100K5%1/10W
R681-216-097-00 METAL CHIP100K5%1/10W
T11-403-872-00 TRANSFORMER, IF (TV IF) (S79V)
T21-404-790-11 TRANSFORMER, IF (AM IF) (S79/S79V)
T21-404-902-41 TRANSFORMER, IF (AM IF) (S79L)
T31-449-138-11 TRANSFORMER, DC-DC CONVERTER
R691-216-097-00 METAL CHIP100K5%1/10W
R701-216-097-00 METAL CHIP100K5%1/10W
R711-216-097-00 METAL CHIP100K5%1/10W
R721-216-097-00 METAL CHIP100K5%1/10W
R731-216-097-00 METAL CHIP100K5%1/10W
R741-216-097-00 METAL CHIP100K5%1/10W
R751-216-097-00 METAL CHIP100K5%1/10W
R761-216-097-00 METAL CHIP100K5%1/10W
R771-216-097-00 METAL CHIP100K5%1/10W
R781-216-097-00 METAL CHIP100K5%1/10W
R791-216-097-00 METAL CHIP100K5%1/10W
R801-216-097-00 METAL CHIP100K5%1/10W
R811-216-097-00 METAL CHIP100K5%1/10W
R821-216-097-00 METAL CHIP100K5%1/10W
R831-216-097-00 METAL CHIP100K5%1/10W
R841-216-097-00 METAL CHIP100K5%1/10W
R851-216-073-00 METAL CHIP10K5%1/10W
R861-216-089-00 METAL CHIP47K5%1/10W
R871-216-073-00 METAL CHIP10K5%1/10W
R891-216-025-00 METAL CHIP1005%1/10W
R931-216-065-00 METAL CHIP4.7K5%1/10W
(S79L)
– 19 –
Page 16
ICF-S79/S79L/S79V
MEMO
– 20 –
Page 17
ICF-S79/S79L/S79V
6
7
8
SERVICE MANUAL
Ver 1.1 1999.11
US Model
ICF-S79V
AEP Model
ICF-S79/S79L
UK Model
ICF-S79L
• IC Block Diagrams
– MAIN BOARD –
IC1 TA2030FN (EL)
FM OSC
TV OSC
VCC
FM RF
TV RF
GND
16 1514131211109
FM
TV RF
AMP
FM RF
AMP
TV
OSC
BUFFERMIX
POWER/MODE
OSC
SWITCH
BUFFER
OSC OUT
AMP
MIX OUT
IF
• Change
• EXPLODED VIEW
! : indicates added portion.
PageBefore ChangeAfter Change
Ref. No. Part No.DescriptionRemark
* 4A-3679-919-A MAIN BOARD, COMPLETE (S79V)
127-685-152-19 SCREW +BTP 3X25 TYPE N-S
Ref. No. Part No.DescriptionRemark
* 4A-3683-150-A MAIN BOARD, COMPLETE (S79V)
127-685-552-14 SCREW +BTP 3X25 TYPE N-S
193-043-481-01 SHEET (B), INSULATING
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from
(Conductor Side)the pattern face are indicated.
Parts face side:Parts on the par ts face side seen from
(Component Side) the parts face are indicated.
– 5 –
I
CT3
11
J
05
1-676-960-
(11)
– 6 –
L5
AM FERRITE-ROD
ANTENNA
– 7 –
AA
D6
R26
R25
(VT)
TP
K
C34
11
1-676-960-
(11)
– 8 –
Page 19
• SCHEMATIC DIAGRAM (ICF-S79V) • See page 2 for IC Block Diagrams.
ICF-S79/S79L/S79V
• Waveforms
– MAIN Board –
1 IC6 wf (XOUT)
500mV/DIV, 5µs/DIV
13.4 µs
2 Q11-1 (Base), -2 (Collector)
200mV/DIV, 100ns/DIV
1.8 Vp-p
688 mVp-p
3 Q11-1(Collector)
2V/DIV, 100ns/DIV
5.4 Vp-p
322 ns
Floating
Land
320 ns
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
f
•
• C : panel designation.
• U : B+ Line.
• H : adjustment for repair.
• Power v oltage is dc 4.5 V and f ed with regulated dc power
• Voltages and waveforms are dc with respect to ground
• Voltages are tak en with a VOM (Input impedance 10 MΩ).
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
: internal component.
supply from battery terminal.
under no-signal (detuned) conditions.
no mark : FM (TV2-6ch)
() : AM
〈〈〉〉 : TV (7-13ch)
Voltage variations may be noted due to normal production tolerances.
Voltage variations may be noted due to normal production tolerances.
F: FM (TV2-6ch)
f: AM
L : TV (7-13ch)
4
W or less unless otherwise
– 9 –
– 10 –
– 11 –
Page 20
KEY MAIN
MAINMAIN
• ELECTRICAL PARTS LIST (ICF-S79V)
NOTE:
•Due to standardization, replacements in the
parts list may be different from the parts specified in the diagrams or the components used
on the set.
•-XX and -X mean standardized parts, so they
may have some difference from the original
one.
•RESISTORS
All resistors are in ohms.
METAL: Metal-film resistor.
METAL OXIDE: Metal oxide-film resistor.
F: nonflammable
Printing Method for Large Sized Documents Such As Circuit Diagrams
Printing the page that exceeds A4-size two pages (or letter size) is possible by specifying the print
range. (Acrobat Reader Version 4.0 or later)
1. The enlarged print is made, if a smaller range than A4 size is specified and the A4 size is
selected as a print paper.
2. Almost real sized print is made, if the range is specified, meeting the print paper size.
3. The reduced print is made, if a larger range than the print paper size is specified.
Printing by Specifying a Range
In printing out the drawings such as a schematic diagram and a printed wiring board larger than
the printed paper size, they can be printed by specifying the range. (Acrobat Reader Version 4.0
or later)
1. Display the page to be printed.
2. From the File menu, select [Page Setup] and set the paper size.
3. From the Command bar, select [Graphic Select Tool].
(Keep pressing
4. Dragging the cursor, enclose the range on the page to be printed.
5. From the File menu, select [Print] and make sure that the [Selected Graphic] is already checked.
Also, if [Fit to page] is checked, the selected range is enlarged or reduced (and rotated as
necessary) meeting the paper size.
, select )
T
@
!
6. To cancel the printed range, click an arbitrary position on the screen.
17
Page 24
ICF-S79/S79L/S79V
REVISION HISTORY
Clicking the version allows you to jump to the revised page.
Also, clicking the version at the upper right on the revised page allows you to jump to the next revised
page.
Ver.DateDescription of Revision
1.01997.08New
1.11999.11• Circuit Change (ICF-S79V)
• Change
1.22002.02Addition of ICF-S79V Liv type(ENG-02004)
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