Sony ICF-CD73W Service Manual ▷ View online
ICF-CD73W
29
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
ST
AR
T
OFF
CLK
MUTE34
MUTE1
RESET
IN1
IN2
IN3
IN4
VREF
FIL1
FIL2
FIL3
FIL4
PGND1
OUT4
−
OUT4
+
OUT3
−
OUT3
+
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
EO
EI
VSYS
SW
VG
LG
PGND3
GND
REGO
REGB
DC IN
CT
SOFT
SPR
T
PGND2
OUT1
+
OUT1
−
OUT2
+
OUT2
−
PVCC
VSYS
DC/DC
CONVERTER
SYSTEM
OFF
SYSTEM
ON
OSC
MUTE34
MUTE1
RESET
PRE-DRIVER
PRE-DRIVER
PRE-DRIVER
PRE-DRIVER
VG
CONVERTER
REGULATOR
VSYS
DETECT
RF GND
3
2
1
IF REQ
AM
MIX
FM RFIN
AM LOW CUT
5
4
MIX OUT
VCC
AM IF IN
8
7
6
FM IF IN
GND
10
9
AGC
QUAD
12
11
R-OUT
L-OUT
FM RFOUT
22
23
24
20
21
17
18
19
15
16
13
14
AM RFIN
RF VCC
FM OSC
ST LED
OSC OUT
AM OSC
IF REQ
LPF1
MPX IN
DET OUT
LPF2
FM
MIX
FM
OSC
LEVEL
DET
AM
DET
MUTE
FM
DET
ST/MO
FM/AM
AM
OSC
AGC
SW
ST
1/8
BUFF
BUFF
DIVIDE
DECODE
VCO
IF BUFF
AF BUFF
AF
FM RF
AM IF
FM IF
1/1 OR
1/16
IC702 BH6575FV-E2
– TUNER Board –
IC1 TA2149BN
ICF-CD73W
30
11
10
9
8
7
6
5
4
3
2
1
12
13
14
15
16
19
20
UNLOCK
DETECTOR
POWER ON
RESET
UNIVERSAL
COUNTER
CCB
I/F
CE
DI
CL
DO
XOUT
AOUT
XIN
AIN
PD
PD
VSS
VDD
B04
FMIN
AMIN
B01
B02
B03
I01
I02
IFIN
PHASE
DETECTOR
CHARGE
PUMP
REFERENCE
DIVIDER
SWALLOW
COUNTER
1/16,1/17
4BITS
12BITS
PROGRAMMABLE
DIVIDER
DA
TA
SHIFT
REGISTER
LA
TCH
1/2
17
18
+
–
–
3
OUTPUT
CONTROL
REFERENCE
VOLTAGE
4
1
2
2
5
CURRENT
LIMIT
NC
VIN
CE
VSS
VOUT
IC2 LC72137M-TLM-E
– POWER Board –
IC301 XC62HR3302PR
ICF-CD73W
31
• IC Pin Function Description
LCD BOARD IC401 uPD789477GC-A61-8BT-A (SYSTEM CONTROLLER)
LCD BOARD IC401 uPD789477GC-A61-8BT-A (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1, 2
NC
-
Not used
3 to 5
VLC2 to VLC0
-
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive volt-
age
age
6 to 9
COM0 to COM3
O
Common drive signal output to the liquid crystal display
10 to 27
SEG17 to SEG0
O
Segment drive signal output to the liquid crystal display
28 to 30
VERSION0 to
VERSION2
I
Setting input terminal for destination
31
POWER ON
O
Power on/off control signal output terminal for the power amplifi er
"L": standby mode, "H": power amplifi er on
"L": standby mode, "H": power amplifi er on
32
R ON
O
Power on/off control signal output for the tuner section "H": tuner power on
33 to 37
NC
I
Not used
38
AVDD
-
Power supply terminal (+3.3V) (analog system)
39
FSEQ
I
CD synchronizing signal detection signal input from the digital signal processor
40
NC
I
Not used
41
AC IN
I
Power detection signal input terminal when connected AC power adapter (A/D input)
42
VM
I
Middle voltage (+3V) detection input for battery check
43
VH
I
High voltage (+6V) detection signal input for AC or battery check
44 to 46
KEY2 to KEY0
I
Front and top panel key input terminal (A/D input)
47
AVSS
-
Ground terminal (for analog system)
48
NC
I
Not used
49
DC CHK
I
Power failure detection signal input terminal "L": power failure, "H": power on
50
WRQ
I
CD interruption signal input from the digital signal processor
51
KEY CHK
I
Key interruption detection signal input terminal
52
BUZZER
O
Beep sound signal output terminal
53
CD DATA IN
I
Serial data input from the digital signal processor
54
CD DATA
O
Serial data output to the digital signal processor
55
CD CLK
O
Serial data transfer clock signal output to the digital signal processor
56
CD CE
O
Chip enable signal output to the digital signal processor
57
DRF
I
CD focus on/off detection signal input from the digital signal processor
58
XRST
O
System reset signal output to the digital signal processor "L": reset
59
CD ON
O
Power on/off control signal output for the CD section "H": CD power on
60
NC
I
Not used
61
CD OPEN
I
CD lid open/close detect switch input terminal "L": CD lid is closed, "H": CD lid is opened
62
MUTE
O
Tuner muting on/off control signal output to the FM/AM PLL "L": muting on
63
COUNT
I
PLL serial count data input terminal from the FM/AM PLL
64
R CLK
O
PLL serial data transfer clock signal output to the FM/AM PLL
65
R DATA
O
PLL serial data output to the FM/AM PLL
66
R CE
O
PLL chip enable signal output to the FM/AM PLL
67, 68
NC
I
Not used
69
IC
-
Ground terminal
70
XT1
I
Sub system clock input terminal (32.768 kHz)
71
XT2
O
Sub system clock output terminal (32.768 kHz)
72
VDD0
-
Power supply terminal (+3.3V)
73
VSS0
-
Ground terminal
74
X1
I
Main system clock input terminal (4.19 MHz)
75
X2
O
Main system clock output terminal (4.19 MHz)
76
RESET
I
System reset signal input from the reset signal generator "L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
77
LOAD
O
Load control signal output terminal for battery reverse insert check
78
A MUTE
O
Audio muting on/off control signal output terminal "L": muting on
79
B MUTE
O
Muting signal on/off control signal output terminal "L": muting on (beep sound on)
80
BATT CHK M
O
Middle voltage (+3V) control signal output terminal for battery check
32
ICF-CD73W
SECTION 7
EXPLODED VIEWS
1
3-368-852-01 FOOT
* 2
A-3683-356-A SW BOARD, COMPLETE
3
2-671-591-01 SCREW +BVTP 2.6X8
4
2-671-592-01 SCREW +BVTP 2.6X10
#1
7-685-534-14 SCREW +BTP 2.6X8 TYPE2 N-S
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
Note:
• -XX and -X mean standardized parts, so
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
original one.
• Items marked “
*” are not stocked since
they are seldom required for routine ser-
vice.
vice.
Some delay should be anticipated when
ordering these items.
• The mechanical parts with no reference
number in the exploded views are not sup-
plied.
plied.
• Color Indication of Appearance Parts Ex-
ample:
KNOB, BALANCE (WHITE) . . . (RED)
R
R
Parts Color Cabinet’s Color
The components identifi ed by mark
0
or dotted line with mark
0 are critical for
safety.
Replace only with part number specifi ed.
Replace only with part number specifi ed.
7-1. OVERALL SECTION
1
1
2
cabinet (upper) section
CD lid section
cabinet (front)
section
section
not supplied
#1
4
4
4
4
3
chassis (main)
section
section
• Accessories are given in the last of the
electrical parts list.
Click on the first or last page to see other ICF-CD73W service manuals if exist.