Sony ICF-S79 / ICF-S79L / ICF-S79V Service Manual ▷ View online
– 13 –
• Waveforms
1
IC6
@∞
(XIN)
2 Vp-p
13.3
µ
s
2
IC6
#¡
–
#¢
(COM0 – COM3)
3 Vp-p
32 ms
3
IC6
#∞
–
$•
(LCD0 – LCD13)
3 Vp-p
32 ms
4
D11 ANODE
440 ns
30 Vp-p
5
Q11-1 COLLECTOR
6 Vp-p
360 ns
• IC Block Diagrams
IC1
TA7358P (ICF-S79V only)
1
2
3
4
5
6
7
8
9
RF
AMP
REGULATOR
BIAS
MIX
OSC
RF IN
BYPASS
RF OUT
MIX
GND
MIX OUT
OSC OUT
OSC
VCC
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
N.C
FE GND
AM RF IN
FM RF
REG OUT
FM OSC
FM RF IN
AFC
AM OSC
VOL
NF
FM DISCRI
GND
GND
IC2
CXA1019S
– 14 –
Pin No.
Pin Name
I/O
Function
1
INIT OUT
O
Initialize signal output for the destination select
2
POWER
O
Radio power on/off control signal output “H”: power on
3
MUTE
O
Mute on/off control signal output “L”: mute on
4
AL LEVEL
O
Beep sound level variable output terminal Not used (open)
5
NC
O
Not used (open)
6 to 9
KS0 to KS3
O
Key strobe signal output terminal
10 to 13
KR0 to KR3
I
Key return signal input terminal
14
BAND1
O
Band select signal output terminal *1
15
BAND2
O
Band select signal output terminal *1
Used for ICF-S79L/S79V only (ICF-S79: not used (open))
Used for ICF-S79L/S79V only (ICF-S79: not used (open))
16
V AMP
—
Power supply terminal for buffer amplifier
17
NC
O
Not used (open)
18
GND
—
Ground terminal
19
EO
O
PLL error signal output terminal
20
VCOL
I
AM (MW) or LW VCO input terminal
21
VCOH
I
FM, TV or WEATHER VCO input terminal
22
VREG1
—
Power supply terminal (connected to the coupling capacitor)
23
VDD
—
Power supply terminal (+2.2 V)
24
XOUT
O
System clock output terminal (75 kHz)
25
XIN
I
System clock input terminal (75 kHz)
26
VREG2
—
Power supply terminal (connected to the coupling capacitor)
27
VLCD0
—
28
CAP0
—
29
CAP1
—
30
VLCD2
—
31 to 34
COM0 to COM3
O
Common drive signal output to the liquid crystal display (LCD1)
35 to 48
LCD0 to LCD13
O
Segment drive signal output to the liquid crystal display (LCD1)
49
LCD14
O
Segment drive signal output terminal Not used (open)
50
CE
I
Power failure detection signal input from the IC5 Normally: “H”
51
INT
I
Not used (fixed at “L”)
52
BEEP
O
Beep sound drive signal output terminal
53
VDET
I
Power failure detection signal input from the IC4 Normally: “H”
54
PB1
I
Initialize signal input for the destination select Fixed at “L”
55
PB2
I
Initialize signal input for the destination select
ICF-S79/S79L: initialize mode at “H”, ICF-S79V: fixed at “L”
ICF-S79/S79L: initialize mode at “H”, ICF-S79V: fixed at “L”
56
PB3
I
Initialize signal input for the destination select
ICF-S79L: initialize mode at “H”, ICF-S79/S79V: fixed at “L”
ICF-S79L: initialize mode at “H”, ICF-S79/S79V: fixed at “L”
MAIN BOARD IC6
µ
PD17071GB-517-1A7
(SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY CONTROLLER, KEY CONTROL)
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive
voltage
voltage
*1 Band select signal
FM (TV L)
TV H/
WEATHER
AM (MW)
LW
BAND1 (pin !¢)
“L”
“L”
“H”
“H”
BAND2 (pin !∞)
“L”
“H”
“L”
“H”
4-4.
IC PIN FUNCTION DESCRIPTION
– 15 –
SECTION 5
EXPLODED VIEW
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
delay should be anticipated when ordering these
items.
• The mechanical parts with no reference num-
ber in the exploded views are not supplied.
• Accessories and packing materials are given in
the last of the electrical parts list.
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)
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color
Cabinet's Color
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
not supplied
not supplied
not supplied
LCD1
SP1
11
1
2
3
4
6
7
8
9
10
12
13
14
15
16
17
18
1
X-3374-190-1 CABINET (FRONT) ASSY (S79V: Original type)
1
X-3374-190-2 CABINET (FRONT) ASSY (S79L)
1
X-3374-190-3 CABINET (FRONT) ASSY (S79)
1
X-3374-190-6 CABINET (FRONT) ASSY (S79V: Liv type)
2
3-016-880-01 PLATE (BUTTON), SHEET (S79V: Original type)
2
3-016-880-11 PLATE (BUTTON), SHEET (S79/S79L)
2
3-016-880-31 PLATE (BUTTON), SHEET (S79V: Liv type)
* 3
3-016-863-01 CHASSIS
* 4
A-3679-918-A MAIN BOARD, COMPLETE (S79)
* 4
A-3679-919-A MAIN BOARD, COMPLETE (S79V)
* 4
A-3679-921-A MAIN BOARD, COMPLETE (S79L)
6
3-016-875-01 SHEET (BATTERY) (A)
7
3-016-869-01 TERMINAL (+), BATTERY
8
3-016-861-01 CABINET (REAR)
(S79/S79L/S79V: Original type)
8
3-016-861-31 CABINET (REAR) (S79V: Liv type)
9
3-016-871-01 TERMINAL (+.–) (A), BATTERY
10
3-016-872-01 TERMINAL (+.–) (B), BATTERY
11
3-016-870-01 TERMINAL (–), BATTERY
12
7-685-152-19 SCREW +BTP 3X25 TYPE2 N-S
13
3-016-876-01 SHEET (BATTERY) (B)
14
3-368-852-01 FOOT
15
3-016-862-01 LID, BATTERY CASE
(S79/S79L/S79V: Original type)
15
3-016-862-21 LID, BATTERY CASE (S79V: Liv type)
16
3-016-867-01 SPRING, SP
17
3-016-873-01 SPRING, RING
18
3-016-864-01 KNOB (VOL) (S79/S79L/S79V: Original type)
18
3-016-864-21 KNOB (VOL) (S79V: Liv type)
SP1
1-504-918-11 SPEAKER (7.7CM)
LCD1
1-801-854-11 DISPLAY PANEL, LIQUID CRYSTAL
Ver 1.2
• Please refer to model identification (page
1) for system of original type and Liv
type.
type.
– 16 –
SECTION 6
ELECTRICAL PARTS LIST
Ref. No.
Part No.
Description
Remark
NOTE:
• Due to standardization, replacements in the
parts list may be different from the parts speci-
fied in the diagrams or the components used on
the set.
fied 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
METAL: Metal-film resistor.
METAL OXIDE: Metal oxide-film resistor.
F: nonflammable
• Items marked “*” are not stocked since they
are seldom required for routine service.
Some delay should be anticipated when order-
ing these items.
Some delay should be anticipated when order-
ing these items.
• SEMICONDUCTORS
In each case, u: µ, for example:
uA. .
uA. .
: µA. .
uPA. . : µPA. .
uPB. .
: µPB. .
uPC. . : µPC. .
uPD. .
: µPD. .
• CAPACITORS
uF: µF
• COILS
uH: µH
Ref. No.
Part No.
Description
Remark
KEY
When indicating parts by reference
number, please include the board.
number, please include the board.
KEY BOARD (INCLUDED MAIN BOARD)
**********
**********
< SWITCH >
S101
1-554-303-21 SWITCH, TACTILE (RADIO ON)
S102
1-554-303-21 SWITCH, TACTILE
(PRESET TUNIG/PRESET TIMER 1)
S103
1-554-303-21 SWITCH, TACTILE
(PRESET TUNIG/PRESET TIMER 2)
S104
1-554-303-21 SWITCH, TACTILE
(PRESET TUNIG/PRESET TIMER 3)
S105
1-554-303-21 SWITCH, TACTILE
(PRESET TUNIG/PRESET TIMER 4)
S106
1-554-303-21 SWITCH, TACTILE
(PRESET TUNIG/PRESET TIMER 5)
S107
1-554-303-21 SWITCH, TACTILE (BAND)
S108
1-554-303-21 SWITCH, TACTILE (WEATHER) (S79V)
S109
1-554-303-21 SWITCH, TACTILE (TIMER SET/ON/OFF)
S110
1-554-303-21 SWITCH, TACTILE (TUNE/TIMER ADJUST +)
S111
1-554-303-21 SWITCH, TACTILE (TUNE/TIMER ADJUST –)
S112
1-554-303-21 SWITCH, TACTILE (CLOCK)
S113
1-554-303-21 SWITCH, TACTILE (OFF)
************************************************************
*
A-3662-876-A MAIN BOARD, COMPLETE (S79)
*
A-3662-879-A MAIN BOARD, COMPLETE (S79V)
*
A-3662-888-A MAIN BOARD, COMPLETE (S79L)
(INCLUDING KEY BOARD)
**********************
*
3-016-863-01 CHASSIS
< BAND PASS FILTER >
BPF1
1-236-711-21 FILTER, BAND PASS (S79/S79L)
BPF1
1-239-813-21 FILTER, BAND PASS (S79V)
BPF2
1-233-521-11 FILTER, BAND PASS (S79V)
< CAPACITOR/CHIP CONDUCTOR >
C1
1-163-141-00 CERAMIC CHIP
0.001uF
5%
50V
(S79V)
C2
1-163-141-00 CERAMIC CHIP
0.001uF
5%
50V
(S79V)
C3
1-163-009-11 CERAMIC CHIP
0.001uF
10%
50V
(S79V)
C4
1-163-217-11 CERAMIC CHIP
1PF
0.25PF50V
(S79V)
C5
1-163-141-00 CERAMIC CHIP
0.001uF
5%
50V
(S79V)
C6
1-163-141-00 CERAMIC CHIP
0.001uF
5%
50V
(S79V)
C7
1-163-085-00 CERAMIC CHIP
2PF
0.25PF50V
(S79V)
C8
1-163-231-11 CERAMIC CHIP
15PF
5%
50V
(S79V)
C9
1-163-141-00 CERAMIC CHIP
0.001uF
5%
50V
(S79V)
C10
1-163-217-11 CERAMIC CHIP
1PF
0.25PF50V
(S79V)
C11
1-163-009-11 CERAMIC CHIP
0.001uF
10%
50V
(S79V)
C12
1-163-009-11 CERAMIC CHIP
0.001uF
10%
50V
(S79V)
C13
1-124-584-00 ELECT
100uF
20%
10V
(S79V)
C14
1-164-232-11 CERAMIC CHIP
0.01uF
50V
(S79V)
C15
1-164-232-11 CERAMIC CHIP
0.01uF
50V
(S79V)
C16
1-164-232-11 CERAMIC CHIP
0.01uF
50V
(S79V)
C19
1-216-295-00 CONDUCTOR, CHIP (2012)
C21
1-163-118-00 CERAMIC CHIP
110PF
5%
50V
(S79L)
C22
1-163-133-00 CERAMIC CHIP
470PF
5%
50V
(S79L)
C23
1-163-141-00 CERAMIC CHIP
0.001uF
5%
50V
C24
1-163-141-00 CERAMIC CHIP
0.001uF
5%
50V
C25
1-216-295-91 CONDUCTOR, CHIP (2012)
C26
1-104-396-11 ELECT
10uF
20%
16V
C27
1-163-141-00 CERAMIC CHIP
0.001uF
5%
50V
(S79V)
C27
1-216-295-00 CONDUCTOR, CHIP (2012) (S79/S79L)
C28
1-164-232-11 CERAMIC CHIP
0.01uF
50V
C29
1-163-085-00 CERAMIC CHIP
2PF
0.25PF50V
C30
1-163-141-00 CERAMIC CHIP
0.001uF
5%
50V
C31
1-163-125-00 CERAMIC CHIP
220PF
5%
50V
C32
1-163-085-00 CERAMIC CHIP
2PF
0.25PF50V
C33
1-163-009-11 CERAMIC CHIP
0.001uF
10%
50V
MAIN
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