Sony ICF-C763 / ICF-C763L Service Manual ▷ View online
ICF-C763/C763L
5
L2 : FM tracking
adjustment
adjustment
CT2 : LW
tracking
adjustment
tracking
adjustment
L1 : AM (MW)
tracking
adjustment
tracking
adjustment
CT1 : AM (MW)
tracking
adjustment
tracking
adjustment
MAIN BOARD (Component Side)
L4 : AM (MW)
Frequency coverage
adjustment
Frequency coverage
adjustment
CT4 : LW
Frequency coverage
adjustment
Frequency coverage
adjustment
CT3 : FM tracking
adjustment
adjustment
L1 : LW tracking
adjustment
adjustment
T1 : AM (MW)
IF adjustment
IF adjustment
JC1
C14
C44
C20
R8
R9
R6
C4
JW1
JW12
C22
C2
C8
C9
C30
C11
C10
JC1
C26
C28
C15
E
E B
E B C
E B C
C B
C B E
C B E
JC
C
R
JW4
R22
R14
C23
R15
C24
C29
L3
C33
C36
C34
C32
R3
C12
C13
JW9
R7
CT4
CT1
CT2
CT3
C43
D103
D104
C7:C763
JC7:C763L
C763
C763L
C763L
C763L
C6
JW8
C5
R5
C1
R2
R4
C3
D2
R18
R20
C40
R17
R16
C37
T1
CF1
C31
SPK+
C3
C39
R13
C27
R21
JC2
D3
L2
L4
BPF1
CF2
C25
US,CND
IT
,UK
IT,AEP
JW110
JW3
R19
C41
R1
Q1
D4
Q4
Q6
Q7
Q2
D1
IC1
1 2
1
2
1
14
15
28
TP(ANT)
TP(VT)
MAIN BOARD (Conductor Side)
MAIN BOARD (Conductor Side)
TP (VT)
TP (ANT)
SPK+
Adjustment and Connect Location
ICF-C763/C763L
6
SECTION 3
DIAGRAMS
• Circuit Boards Location
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.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise specified.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Voltages are dc with respect to ground under no-signal conditions.
no mark : FM
(
(
) : AM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production toler-
ances.
ances.
• Signal path.
F
: FM
f
: AM
• Abbreviation
CND : Canadian model
IT
IT
: Itarian model
Note:
• X
: parts extracted from the component side.
•
: Pattern from the side which enables seeing.
3-1. IC Block Diagrams
IC1 CXA1019M
GND
GND
FM DISCRI
NF
VOL
AM OSC
AFC
FM OSC
REG OUT
FM RF
AM RF IN
N. C
FM RF IN
FE GND
MIX OUT
21
22
23
24
25
26
27
28
29
30
2
3
5
4
6
7
8
9
10
1
11
12
13
14
15
16
17
18
19
20
AF POWER AMP
AM IF DET AGC
AM FE
FM
DISCRIMINATOR
FM FE
TUNING
METER
FM IF
GND
GND
AF OUT
Vcc
RIPPLE
FILTER
AF IN
DET OUT
AFC AGC
AFC AGC
IF GND
METER
N. C
FM IF IN
AM IF IN
FM/AM
BAND
SELECT
Note:
The components identi-
fied by mark
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
7
7
ICF-C763/C763L
Pin No.
Pin Name
I/O
Description
1, 2
BACK LIGHT1, 2
O
Back light LED
3, 4
ILLUMINATION1, 2
O
Illumination LED
5 to 9
KS0 to 4
O
Key source
10 to 13
KR0 to 3
I
Key return (Pull-down resistor: ON setting)
14
ILLUMINATION 2
O
Illumination LED
15
MUTE
O
Mute output
16, 17
BAND1, 2
O
Band output
18
GND
–
Ground
19
EO
O
Output for charge pump for PLL frequency synthesizer
20
VCOL
I
VCO input on AM band
21
VCOH
I
VCO input on FM band
22
REG0
–
Voltage regulator for PLL output
23
VDD
–
Power supply (+3V)
24
XOUT
O
Connected to crystal oscillator for system clock
(75kHz)
25
XIN
I
Connected to crystal oscillator for system clock
(75kHz)
26
REG1
–
Voltage regulator for oscillation circuit output
27
REGLCD0
–
LCD drive power supply terminal
28, 29
CAPLCD0, 1
–
Connected to the capacitor for doubler circuit
30
REGLCD1
–
LCD drive power supply terminal
31 to 34
COM0 to 3
O
LCD common output
35 to 49
LCD0to 14
O
LCD segment output
50
CE
I
Chip enable signal input
51
INT
I
Door open/close detect input
52
BEEP
O
BEEP output
53
MELODY ST
O
Melody IC starts playing
54
MELODY CK
O
Melody IC serial clock
55
MELODY DATA
O
Melody IC serial data
56
INTIAL
O
Initial output
3-2. IC Pin Function Descriptions
• IC100 SYSTEM CONTROL (MPD17072GB-573-1A7)
ICF-C763/C763L
8
8
3-3. PRINTED WIRING BOARD – MAIN SECTION –
A
POWER
BOARD
(Page 12)
1
2
7
6
MAIN BOARD
R109
R100
C112
R112
R113
D100
D101
D102
C110
C137
JC104
JC103
R122
JC102
C14
C44
C20
R8
R9
R6
C4
JW1
JW12
C22
C2
C8
C9
C30
C11
C10
JC1
C26
C28
R128
JW7
C15
C125
C19
C124
C132
C133
C107
C111
R125
C106
R107
R117
R105
R106
C105
E B C
E B C
E B C
E B C
C B E
C B E
C B E
C B E
C B E
C B E
C B E
C129
C134
C128
C135
JC8
JC9
C21
R12
R132
R25
JW4
R22
R14
C23
R15
C24
C29
L3
C33
C36
C34
C32
C38
R3
C12
C13
C117
C115
JW9
C114
R130
C119
C120
R124
R110
C118
C113
C116
R7
CT4
CT1
CT2
CT3
C43
CN2
D103
D104
C7:C763
JC7:C763L
C763
C763
C763L
C763L
C763L
C763L
C763L
C763L
C6
JW8
C5
R5
C1
R2
R4
C3
D2
R18
R20
C40
R17
R16
C37
T1
CF1
C31
SPK+
C35
C39
R13
C27
CF3
R123
R21
C126
C127
C131
C130
C130
IC100
JW103
JW107
JW113
X101
JW102
JW101
1
1
18
14
15
28
29
43 42
56
JW105
LCD101
D100 - 102
(BACK LIGHT)
R129
C108
C109
IC101
R115
R111
R11
CN1
CN3
Q3
R26
JC106
JC107
C103
R108
R103
R103
R104
R101
R102
C104
R127
R126
JC105
R114
C42
R131
C136
C18
JC2
D3
L2
L4
L4
BPF1
CF2
C25
US,CND
US,CND
IT
,UK
IT,AEP
JW110
JW6
JW3
JW111
R19
C41
R1
Q1
D4
Q5
Q4
Q6
Q7
Q2
Q102
Q103
D106
D105
Q100
Q101
D1
IC1
C122
C123
C16
C17 R10
R118
R119
R120
R121
R119
R120
R121
11
(11)
1-861-853-
C
KEY
BOARD
(Page 10)
1 2
5 4
B
KEY
BOARD
(Page 10)
1
2
14
13
K
1
4
5
8
1
14
15
28
TP(ANT)
TP(VT)
L1
LW/MW
FERRITE-BAR
ANTENNA
L1
AM
FERRITE-BAR
ANTENNA
2
3
4
5
6
A
1
B
C
D
E
D1
D-2
D2
D-3
D3
D-3
D4
D-2
D100
B-2
D101
B-3
D102
B-5
D103
D-1
D104
D-1
D105
B-5
D106
B-5
IC1
D-4
IC100
B-3
IC101
B-4
Q1
C-2
Q2
C-3
Q3
C-5
Q4
C-3
Q5
C-3
Q6
C-3
Q7
D-5
Q100
A-5
Q101
A-5
Q102
B-4
Q103
B-5
Ref. No.
Location
z
Semiconductor
Location
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