Sony ICF-SC1 / ICF-SC1PC Service Manual ▷ View online
– 31 –
– 32 –
Note:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
U
: B+ Line.
• Power voltage is dc 6 V and fed with regulated dc power
supply from external power voltage jack (J402).
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : WFM/AM/NFM
(
no mark : WFM/AM/NFM
(
) : AM/NFM
<
> : NFM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path.
F
r
Refer to page 33 for IC Block Diagrams.
ICF-SC1/SC1PC
5-9. SCHEMATIC DIAGRAM – RF SECTION (2/2) –
– 33 –
r
IC BLOCK DIAGRAMS
IC407 CXA1522N
IC402 CXA1111N
IC401 TA31136FN
LOCAL
OSCILLATION
RSSI
QUADRATURE
DETECTION
1
2
3
4
5
6
7
8
9
10
16
15
14
13
12
11
NOISE
AMP
FILTER
AMP
IF AMP
BUFFER
MIXER
DETECTOR
NOISE
COMPARATOR
MIX IN
GND
N-REC
N-DET
RSSI
IF OUT
QUAD
AF OUT
OSC IN
OSC OUT
MIX OUT
VCC
IF IN
DEC
FIL OUT
FIL IN
L.P.F
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
FM.IF
DISCRI
TUNING
METER
RIPPLE
FILTER
AM.IF
DET.AGC
BAND SIGNAL
OUTPUT CIRCUIT
REGULATOR
FM.FE
AM.FE
BAND
AM IF
FM IF
TUNE
EARTH
IF
AFCW
AFCJ
DET
FILTER
VCC
MUTE
MIX OUT
EARTH
FM IN
NC
AM RF
FM RF
REG
FM OSC
AFC
AM OSC
DISCRI
EARTH
IC301 MB1511-PFV-EF
BINARY 11BIT
PROGRAMABLE
COUNTER
BINARY 7BIT
SWALLOW
COUNTER
CONTROL
CIRCUIT
PRESCALER
CIRCUIT
18BIT
LATCH
15BIT
LATCH
BINARY 14BIT
REFERENCE
COUNTER
SWITCH
PHASE
COMPARATPR
MONITOR FREQUENCY
SELECT CIRCUIT
ANALOG
SWITCH
CHAGE
PUMP
OSCILLATOR
19BIT
SIFT RESISTER
16BIT
SIFT RESISTER
CONTROL
1BIT
LATCH
2
1
3
4
20 19 18
NC
∅
R
∅
P
F OSC
SW
FC
LE
DATA
NC
CLK
F IN
NC
NC
OSC I
LD
GND
DO
VCC
VP
OSC O
17
16
15
14
13
12
11
6
5
7
8
9
10
REG
VOL
PRE+POWER1
PRE+POWER2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN1
REG
NF1
VOL
GND1
P-GND1
OUT1
VCC
IN2
NC
NC
NF2
GND2
P-GND2
OUT2
RIPPLE
– 34 –
IC607
µ
PD4721GS-GJG-E2 (ICF-SC1PC)
IC605 AT25160N-10SC2.7T2.5
2
3
4
5
6
7
8
1
CS
SO
WP
GND
VCC
HOLD
SCK
SI
OUTPUT
BUFFER
MODE
DECODE
LOGIC
DATA
REGISTER
CLOCK
GENERATOR
ADDRESS
DECODER
DECODER
STATUS
REGISTER
MEMORY ARRAY
1024/2048/
4096/8192X8
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
1
20
VDD
C1+
VCC
C1–
C5+
C5 –
DIN1
DIN2
ROUT1
ROUT2
C4+
GND
C4–
VSS
STBY
VCHA
DOUT1
DOUT2
RIN1
RIN2
– 35 –
SECTION 6
EXPLODED VIEW
NOTE :
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
one.
• 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
number in the exploded views are not
supplied.
supplied.
• Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.
parts list.
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
1
X-3375-048-1 CABINET (FRONT) ASSY (SC1)
1
X-3375-049-1 CABINET (FRONT) ASSY (SC1PC)
2
3-020-649-01 SHEET (SPEAKER)
3
3-020-631-01 GRILLE (SPEAKER) (SC1)
3
3-020-631-11 GRILLE (SPEAKER) (SC1PC)
4
4-942-636-01 EMBLEM (NO.3.5), SONY
5
3-907-103-11 SPRING, RING
6
3-020-641-01 KNOB (VOL)
7
3-020-629-01 BUTTON (POWER)
8
3-020-628-01 BUTTON (LIGHT)
9
1-771-359-11 SWITCH, RUBBER KEY
* 10
A-3679-948-A MICROCOMPUTER BOARD, COMPLETE
(SC1PC)
* 10
A-3679-949-A MICROCOMPUTER BOARD, COMPLETE (SC1)
11
3-020-633-01 CASE (LCD)
* 12
3-025-927-01 SPACER (B)
13
1-694-377-11 CONDUCTIVE BOARD, CONNECTION
14
3-020-632-01 PLATE, LIGHT GUIDE
15
3-024-792-01 PLATE, CONTACT
16
1-783-112-11 CORD
17
3-713-790-21 SCREW (M2X6), TAPPING, P3
* 18
3-026-576-01 CUSHION (D)
* 19
A-3679-950-A RF BOARD, COMPLETE
* 20
3-020-634-01 CHASSIS
21
1-783-379-11 CABLE, FLEXIBLE FLAT (22 CORE)
22
3-025-928-01 CUSHION (A)
23
3-020-636-01 LUG (BNC)
24
3-020-637-01 FRAME
25
3-020-635-01 RING (BNC) (SC1)
25
3-020-635-11 RING (BNC) (SC1PC)
26
1-784-075-11 CONNECTOR, COAXIAL (BNC TYPE)
27
3-025-438-01 SPACER (C)
28
3-020-640-01 LED, BATTERY CASE (SC1)
28
3-020-640-11 LED, BATTERY CASE (SC1PC)
* 29
A-3679-951-A IF BOARD, COMPLETE
* 30
3-026-273-01 CUSHION (B)
31
4-860-518-00 CUSHION
32
1-783-378-11 CABLE, FLEXIBLE FLAT (16 CORE)
33
3-020-639-01 CABINET (REAR) (SC1)
33
3-020-639-11 CABINET (REAR) (SC1PC)
34
3-907-747-01 SPRING (+/-.B), BATTERY
35
3-919-944-01 TERMINAL (+), BATTERY
36
3-907-746-01 SPRING (+/-.A), BATTERY
37
3-020-638-01 TERMINAL (-), BATTERY
ANT101 1-501-969-11 ANTENNA, HELICAL
LCD601 1-803-003-11 DISPLAY PANEL, LIQUID CRYSTAL
LCD601 1-803-003-11 DISPLAY PANEL, LIQUID CRYSTAL
SP401
1-505-872-11 SPEAKER (3.6cm)
#1
#2
#3
LCD601
ANT101
SP401
1
2
3
4
28
5
6
7
8
9
10
11
12
13
14
15
16
17
17
17
17
18
19
20
21
23
24
25
26
27
30
31
32
33
34
35
36
37
29
22
(including
r
A)
r
A
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