Sony ICF-C773 / ICF-C773L Service Manual ▷ View online
ICF-C773/C773L
21
• IC BLOCK DIAGRAMS
IC1 CXA1019M
GND
FM DISCRI
NF
VOL
AM OSC
AFC
FM OSC
REG
FM RF
AM ANT
N. C
FM ANT
FE GND
MIX OUT
AF POWER AMP
AM IF DET AGC
AM FE
FM
DISCRIMINATOR
FM FE
TUNING
METER
FM IF
GND
AF OUT
VDD
RIPPLE
FILTER
AF IN
DET OUT
AFC(J) AGC
AFC(W) AGC
IF GND
LED
N. C
FM IF IN
AM IF IN
BAND SW
2
3
5
4
6
7
8
9
10
1
11
12
13
14
15
21
22
23
24
25
26
27
28
16
17
18
19
20
IC102 SM1125-AWV-E2
VSS
VDD
MTO
TEST
OSC
SI
SC
ST
CONTROL
CIRCUIT
7
8
6
5
2
3
4
1
OSC
SW1
MASTER SLICE
DIVIDER
1/128
TEMPO LATCH
TEMPO COUNTER
RHYTHM
COUNTER
ADDRESS
COUNTER
COUNTER
START
ADDRESS
LATCH
SCALE
COUNTER
SCALE
ROM
MAIN
ROM
MULTI-
PLEXER
SW2
1/2 or 1/4
GATE
ICF-C773/C773L
22
Pin No.
Pin Name
I/O
Description
1
NC
–
Not used (OPEN)
2,3
LIGHT1,2
O
LCD back light on/off signal output
4
LIGHT3
O
Illumination LED on/off signal output
5
MUTE
O
Mute control signal output
6 to 9
KS0 to 3
O
Key source signal output
10 to 13
KR0 to 3
I
Key return signal input
14
BAND1
O
Tuner band (FM/AM) selection signal output
15
BAND2
O
Not used (OPEN) (C773 model)
Tuner band (MW/LW) selection signal output (C773L model)
16,17
INITIAL1,2
I
Destination setting terminal
18
GND
–
Ground
19
EO
O
Tuning data output
20
VCOL
I
Tuner AM(C773 model), MW/LW(C773L model) OSC frequency input
21
VCOH
I
Tuner FM OSC frequency input
22
REG0
–
Capacitor connection terminal
23
VDD
–
Power supply
24
X OUT
O
System clock output (75kHz)
25
X IN
I
System clock input (75kHz)
26
REG1
–
Capacitor connection terminal
27
VLCD0
–
Not used
28,29
CAP0,1
–
Capacitor connection terminal
30
VLCD1
–
Not used
31 to 34
COM0 to 3
O
LCD common drive signal output
35 to 48
LCD0 to 13
O
LCD segment drive signal output
49
LCD14
O
Not used (OPEN)
50
CE
I
Time clock pulse input
51
INT
I
Not used (Pull down)
52
BEEP
O
Beep signal output
53
MELODY ST
O
Melody decoder strobe signal output
54
MELODY CK
I
Melody decoder serial clock output
55
MELODY DATA
I
Melody decoder serial data output
56
POWER
–
Not used (OPEN)
4-11. IC Pin Function Descriptions
• IC101 SYSTEM CONTROL (uPD17072GB-574-1A7-A)
23
ICF-C773/C773L
SECTION 5
EXPLODED VIEWS
NOTE :
•
•
-XX, -X mean standardized parts, so they may
have some differences from the original one.
have some differences from the original one.
•
Items marked “ * ”are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
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.
in the exploded views are not supplied.
•
Accessories are given in the last of this parts
list.
list.
•
Abbreviation
CND: Canadian model
IT
CND: Canadian model
IT
: Itarian model
Ref. No.
Part No.
Description
Remarks
Ref. No.
Part No.
Description
Remarks
The components identified by mark 0
or dotted line with mark 0 are critical
for safety.
Replace only with part number specified.
or dotted line with mark 0 are critical
for safety.
Replace only with part number specified.
Les composants identifiés par une
marque 0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
marque 0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
When indicating parts by reference
number, please include the board.
number, please include the board.
2
W301
5
W303
not supplied
6
12
12
7
4
3
1
1
not supplied
main section
SP1
not supplied
1
T401
8
9
9
11
10
10
6
1
3-254-081-01 SCREW
2
2-587-779-01 HOLDER (PWB)
3
2-587-776-01 KNOB (VOL)
4
A-1106-887-A KEY (R) BOARD, COMPLETE
5
A-1106-885-A KEY (L) BOARD, COMPLETE
6
3-252-827-01 SCREW (B2.6), (+) BV TAPPING
7
X-2059-529-1 CABINET (REAR) SUB ASSY
8
A-1106-902-A POWER BOARD, COMPLETE
9
3-254-083-01 SCREW
10
2-631-556-01 FOOT, RUBBER
11
X-2059-531-1 FOOT SUB ASSY
12
2-631-557-01 CUSHION (SW)
SP1
1-505-141-13 SPEAKER (4.5cm)
0 T401
1-468-918-11 POWER UNIT (C773: US, CND)
0 T401
1-468-919-11 POWER UNIT (C773: IT/C773L: AEP)
0 T401
1-468-920-11 POWER UNIT (C773: UK)
W301
1-830-453-11 CABLE, FLEXIBLE FLAT (7 CORE)
W303
1-830-452-11 CABLE, FLEXIBLE FLAT (5 CORE)
5-1.
LOWER CABINET, BACK CABINET SECTION
24
ICF-C773/C773L
51
X-2059-530-1 CABINET (FRONT) SUB ASSY
52
3-254-139-01 SCREW (1.7)
53
2-587-777-01 HOLDER (LCD)
54
3-254-083-01 SCREW
55
A-1106-895-A LCD BOARD, COMPLETE
56
2-587-778-01 HOLDER (ANT)
57
A-1106-891-A MAIN BOARD, COMPLETE (C773: IT)
57
A-1110-344-A MAIN BOARD, COMPLETE (C773L: AEP)
57
A-1110-733-A MAIN BOARD, COMPLETE (C773: UK)
57
A-1111-103-A MAIN BOARD, COMPLETE (C773: US, CND)
58
2-595-109-01 PLATE (L), DIFFUSION
59
2-631-558-01 SHEET (A), LIGHT INTERCEPTION
60
3-254-081-01 SCREW
61
2-631-559-01 SHEET (B), LIGHT INTERCEPTION
62
2-587-769-01 REFLECTOR (L)
Ref. No.
Part No.
Description
Remarks
Ref. No.
Part No.
Description
Remarks
5-2.
MIAN SECTION
58
60
60
61
60
61
60
62
63
64
65
not
supplied
supplied
52
55
53
52
54
not supplied
not supplied
not
supplied
supplied
not
supplied
57
W103
W302
56
59
59
L4
not
supplied
supplied
not
supplied
supplied
not
supplied
supplied
not
supplied
supplied
66
67
54
not
supplied
supplied
69
69
71
64
65
72
70
51
68
63
2-587-767-01 PANEL (L), SIDE
64
3-254-151-01 SCREW (B2.6), (+) P TAPPING
65
2-587-786-01 PLATE, ORNAMENT
66
X-2059-527-1 CABINET (UPPER) SUB ASSY (C773)
66
X-2059-528-1 CABINET (UPPER) SUB ASSY (C773L)
67
A-1106-882-A KEY (MAIN) BOARD, COMPLETE
68
2-587-765-01 CHASSIS
69
3-252-827-01 SCREW (B2.6), (+) BV TAPPING
70
2-587-768-01 REFLECTOR (R)
71
2-587-766-01 PANEL (R), SIDE
72
2-595-108-01 PLATE (R), DIFFUSION
L4
1-428-951-11 COIL, FERRITE-ROD ANTENNA (MW) (C773)
L4
1-428-952-11 COIL, FERRITE-ROD ANTENNA (C773L)
W103
1-830-451-11 CABLE, FLEXIBLE FLAT (3 CORE)
W302
1-830-455-11 CABLE, FLEXIBLE FLAT (10 CORE)
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