Sony ICF-CD73 / ICF-CD73V Service Manual ▷ View online
ICF-CD73/CD73V
17
17
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – CD Section –
A
B
D
F
E
C
I-V AMP
DETECTOR
19
20
17
18
22
SL+
SL–
FCS–
FCS+
TRK+
TRK–
SPINDLE
MOTOR DRIVE
M702
(SPINDLE)
SLED
MOTOR DRIVE
23
M701
(SLED)
FOCUS
COIL DRIVE
TRACKING
COIL DRIVE
SP+
SP–
7
8
9
10
FCS IN
TRK IN
SL IN
SP IN
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE,
POWER CONTROL
IC702
LD
PD
LASER DIODE
OPTICAL PICK-UP
BLOCK
(KSM-900AAA)
2-AXIS
DEVICE
(FOCUS)
(TRACKING)
25
24
REGB
M
M
4
MUTE34
AUTOMATIC
POWER
CONTROL
Q701
8
FIN2 (PD1)
7
FIN1 (PD2)
+
MIX
4
RF
LPF
EQ
PH
BH
10
TIN2 (F)
9
TIN1 (E)
A/D
SW
LPF
TRACK
JUMP
TBAL
80
LDD
APC
AUDIO
ADJUST
SERVO
PROCESSOR
RUPTURE
DETECT
79
LDS
SW
AGC
D/A
13
FE
15
TE
20
TDO
21
FDO
23
SLDO
22
SPDO
S/H
3
EFMIN
SLISE LEVEL
CONTROL
ERROR
CORRECTION
AUDIO CD
RAM
8FS
DIGITAL
FILTER
INTERPOLATION
MUTE
ATTENUATION
DEEMPHASIS
1 BIT
DAC
42
LCHO
RCHO
LPF
DOUT
AUDIO
OUT
FSEQ
PLL
VCEC
CLV, CAV
CONTROL
FRAME SYNC
DETECT,
PROTECT, INSERT,
EFM DECODE
31
RAM
DRF
67
25
CONT4
72
CONT1
66
RES
65
WRQ
61
CE
62
CL
63
DI
64
DO
RF AMP, FOCUS/TRACKING SERVO,
DIGITAL SIGNAL PROCESSOR, CLV SERVO,
DIGITAL FILTER, D/A CONVERTER
IC701
53 CD DATA IN
54 CD DATA
55 CD CLK
56 CD CE
50 WRQ
58 XRST
57 DRF
39 FSEQ
59 CD ON
61
CD OPEN
S551
(CD LID OPEN/CLOSE)
A
SYSTEM
CONTROLLER
IC401
(1/2)
R-CH
GENERAL PURPOSE
PORTS
COMMAND
INTERFACE
INTERFACE
DRF
5
MUTE1
XOUT
XIN
X701
16.9344MHz
CD LCH
PD1
PD2
F
E
LO LD
LO PD
TRK +
TRK –
FCS +
FCS –
When the optical pick-up
is inner position
is inner position
ON :
S701
(LIMIT)
45
39
CLOCK
GENERATOR
48
49
• SIGNAL PATH
: CD PLAY
• R-ch is omitted due to same as L-ch.
MUTING
SWITCH
SWITCH
Q702
DC IN
CD ON
SWITCH
Q703, 704
REGULATOR
30
+3.3V
REGULATOR
Q705
CD +3.3V
PVCC
31
(Page 20)
ICF-CD73/CD73V
18
18
6-2.
BLOCK DIAGRAM – TUNER Section (ICF-CD73) –
2
24
4
7
20
21
FM
RF AMP
FM
MIX
FM
OSC
FM IF
AMP
IF
BUFFER
AF
BUFFER
AF
AMP
MPX
MUTE
STEREO/
MONO,
FM/AM
FM/AM
AM IF
AMP
FM
DET
AM
DET
DET
6
FM
RF IN
RF IN
22
AM
RF AMP
AM
MIX
AM
RF IN
RF IN
MIX OUT
OSC
OUT
CF2
FM/AM PLL
IC2
CF4
FM
RF OUT
RF OUT
10
QUAD
FM
IF IN
IF IN
12
15
11
L-OUT
MPX
IN
IN
R-OUT
13
AM
IF IN
IF IN
LPF1/BAND
AM OSC
FM OSC
FM/AM RF AMP, MIX, OSC,
FM/AM IF AMP, DET, MPX
IC1
L2
FM VCO VOLTAGE
L4
AM VCO VOLTAGE
CT1, L1
FM TRACKING
CT3, L3
AM TRACKING
T1
AM IFT
LOW-PASS
FILTER
LOW-PASS
FILTER
• SIGNAL PATH
: FM
: AM
X1
75kHz
CT3
L1
FM RF
XOUT
XIN
AMIN
IF IN
ST
-IND
LP-OUT
LP-IN
FMIN
20
19
11
12
18
FM/AM
6
CT1
D1
L4
AM OSC
L2
FM OSC
LEVEL
DET
ST
IND
14
LPF2/MO-ST
AM
OSC
BUFFER
BUFFER
SWALLOW
COUNTER
UNIVERSAL
COUNTER
CCB
INTERFACE
REFERENCE
DIVIDER
UNLOCK
DETECT
12 BIT
PROGRAMMABLE
DIVIDER
PHASE
DETECTOR/
CHARGE PUMP
SHIFT REGISTER & LATCH
1/2
BAND
DI
CL
CE
DO
DET
OUT
ANT1
FM LEAD WIRE
ANTENNA
PD
IF OUT
ST IND
2
3
1
4
10
9
BAND
7
MO/ST
13
8
17
16
17
18
16
19
D2
D3
(1/2)
D3
(2/2)
T1
AM IF
• R-ch is omitted due to same as L-ch.
PLL DATA
PLL CLK
PLL CE
COUNT
R-CH
(Page 20)
C
MUTE
TU LCH
(Page 20)
B
T2
FM IFT
T2
FM IF
L3
AM FERRITE-ROD
ANTENNA
VT B+
PLL DATA, PLL CLK,
PLL CE, COUNT, MUTE
ICF-CD73/CD73V
19
19
6-3.
BLOCK DIAGRAM – TUNER Section (ICF-CD73V) –
24
4
7
20
21
FM
OSC
FM IF
AMP
IF
BUFFER
AF
BUFFER
AF
AMP
MPX
MUTE
STEREO/
MONO,
FM/AM
FM/AM
AM IF
AMP
FM
DET
AM
DET
DET
6
FM
RF IN
RF IN
22
AM
RF AMP
AM
MIX
AM
RF IN
RF IN
MIX OUT
OSC
OUT
CF2
FM/AM PLL
IC2
CF4
FM
RF OUT
RF OUT
10
QUAD
FM
IF IN
IF IN
12
15
11
L-OUT
MPX
IN
IN
R-OUT
13
AM
IF IN
IF IN
LPF1/BAND
AM OSC
FM OSC
FM/AM RF AMP, MIX, OSC,
FM/AM IF AMP, DET, MPX
IC1
T1
AM IFT
LOW-PASS
FILTER
X1
75kHz
XOUT
XIN
AMIN
IF IN
ST
-IND
LP-OUT
LP-IN
FMIN
20
19
11
12
18
6
LEVEL
DET
ST
IND
14
LPF2/MO-ST
AM
OSC
BUFFER
BUFFER
SWALLOW
COUNTER
UNIVERSAL
COUNTER
CCB
INTERFACE
REFERENCE
DIVIDER
UNLOCK
DETECT
12 BIT
PROGRAMMABLE
DIVIDER
PHASE
DETECTOR/
CHARGE PUMP
SHIFT REGISTER & LATCH
1/2
FM/AM
DI
CL
CE
DO
DET
OUT
PD
IF OUT
ST IND
2
3
1
4
10
9
TV
-H
5
13
8
17
16
17
18
16
T1
AM IF
PLL DATA
PLL CLK
PLL CE
COUNT
R-CH
(Page 20)
C
MUTE
TU LCH
(Page 20)
B
T2
FM IFT
T2
FM IF
PLL DATA, PLL CLK,
PLL CE, COUNT, MUTE
• SIGNAL PATH
: FM/TV (2
–
6CH)
: AM
• R-ch is omitted due to same as L-ch.
: TV (7
–
13CH)/WEATHER
TV
-H/WB
MO/ST
7
FM/TV
-L
D1
ANT1
FM/TV/WEATHER
LEAD WIRE ANTENNA
B.P.F.
BPF1
D13
D15
L1
TV/WEATHER
RF
CT2
D14
L2
FM/TV
RF
RADIO 6V
D2
D17
L3
TV/WEATHER
OSC
CT4
D24
L4
FM/TV
OSC
CT3
RADIO B+
RADIO B+
TV (7-13CH)/
WEATHER
ON SWITCH
Q11
RADIO B+
FM/TV (2-6CH)
ON SWITCH
Q12
RADIO B+
SWITCHING
Q13
D21
OSC
BUFFER
Q14
2
FM
RF AMP
FM
MIX
CT2, L1
L2
FM/TV(2 – 6CH)
TRACKING
TV(7 – 13CH)/WEATHER
TRACKING
CT5, L5
AM TRACKING
CT5
D3
(1/2)
L5
AM FERRITE-ROD
ANTENNA
L6
AM VCO VOLTAGE
L6
AM OSC
D3
(2/2)
CT4, L3
CT3, L4
FM/TV(2 – 6CH)
VCO VOLTAGE
TV(7 – 13CH)/WEATHER
VCO VOLTAGE
19
VT B+
LOW-PASS
FILTER
ICF-CD73/CD73V
20
20
6-4.
BLOCK DIAGRAM – MAIN Section –
: CD PLAY
: TUNER (FM/AM)
76
RESET
32
R ON
31
POWER ON
SYSTEM CONTROLLER
IC401 (2/2)
B+ SWITCH
Q302, 303
DRY BATTERY
SIZE “C”
(IEC DESIGNATION R14)
4PCS. 6V
+3.3V
REGULATOR
IC403
RESET SIGNAL
GENERATOR
IC402
DC IN 6V
J901
–
+
PVCC
UCOM B+
POWER
AMP B+
VT B+
41
AC IN
AUDIO
CIRCUIT
B+
R-CH
LINE AMP
Q153
D101
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
R-CH
R-CH
R-CH
MUTING
Q101
LINE AMP
Q152
TU LCH
B
ICF-CD73
(Page 18)
(Page 18)
CD LCH
A
(Page 17)
R DATA
R CLK
R CLK
R CE
COUNT
66
65
64
63
ICF-CD73
(Page 18)
(Page 18)
C
MUTE
62
SEG0 – SEG17
LIQUID CRYSTAL DISPLAY
LCD401
10 – 27
COM0 – COM3
6 – 9
PLL DATA
PLL CLK
PLL CLK
PLL CE
COUNT
MUTE
MUTE
A MUTE
78 79
+
+
POWER AMP
IC303
7
1
BUZZER
52
PLL DATA, PLL CLK,
PLL CE, COUNT, MUTE
PLL CE, COUNT, MUTE
WAKE UP
SWITCH
Q401
KEY 2
S607 – 611
44
KEY 1
S601 – 606
45
KEY0
S501 – 503
46
KEY CHK
51
70
71
X401
32.768kHz
74
75
X402
4.19MHz
XT1
XT2
X1
X2
D308
D401
DC MIDDLE VOLTAGE
CONTROL SWITCH
Q405
AGC
Q154
AGC CONTROL
SWITCH
Q301
D309
FILTER AMP
Q151
RV601
VOLUME
MUTING
CONTROL SWITCH
Q403
LIN
LOUT
+
R-CH
SP101
(L-CH)
(L-CH)
SP201
(R-CH)
+6V
REGULATOR
Q301, 306, 307
42
VM
80
BATT CHK M
49
DC CHK
LOAD
43
VH
DC/DC
CONVERTER
Q304, 305, T301
+3.3V
REGULATOR
IC301
D402
LOAD CONTROL
SWITCH
Q406
77
ICF-CD73V
(Page 19)
ICF-CD73V
(Page 19)
B MUTE
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