Sony ICF-CD873 Service Manual ▷ View online
ICF-CD873
11
(11)
11
(11)
11
(11)
11
(11)
– 35 –
– 36 –
6-7.
PRINTED WIRING BOARD – POWER SUPPLY Section –
•
See page 23 for Circuit Boards Location.
• Semiconductor
Location
Ref. No.
Location
D350
G-6
D351
G-6
D901
D-5
D902
D-5
D903
D-5
D904
D-5
D905
E-7
D906
E-7
D907
E-7
D908
E-7
D909
E-6
D910
E-6
D911
F-5
IC350
F-6
IC351
F-7
Q150
E-8
Q151
G-8
Q250
E-8
Q251
G-7
Q350
G-5
Q351
G-5
Q352
G-6
Q353
G-6
Q354
G-7
Q355
G-7
Q901
E-6
Q902
E-6
Q903
F-5
Q904
F-5
Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
W
: indicates side identified with part number.
•
r
: Through hole.
• b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side) the parts face are indicated.
• Abbreviation
AUS
: Australian model
CND : Canadian model
IT
IT
: Italian model
ICF-CD873
– 37 –
– 38 –
• IC Block Diagrams
– MAIN Board –
– MAIN Board –
IC1
CXA1238M-T6
IC50
BU2614FS
IC501
CXA1782CQ
VCO
REGULATOR
FM FRONT-END
AM FRONT-END
MPX
REGULATOR
MONO/STEREO
SELECT
DECORD
AMP
MUTING
AUTO
BLEND
TUNING
INDICATOR
AM IF/
DET
FM IF/
DISCRI
RIPPLE
FILTER
BAND-PASS
MUTE
1
27
28
29
30
24
25
26
21
22
23
18
19
20
16
17
2
3
4
5
6
7
8
9
PLL LPF1
PILOT DET LPF2
PILOT DET LPF2
ST IND/VCO CHECK
L-CH OUT
VCC
R-CH OUT
RIPPLE FILTER
AGC AFC1
10
AGC AFC2
13
FM IF IN
14
AM IF IN
15
BAND SELECT
11
GND
12
TUNE IND
1/2
COUNTER
1/2
COUNTER
PD1
PD2
FM/AM FE OUT
FM GND
FM RF IN
AM RF IN
FM RF
REG
FM OSC
AFC
AM OSC
MUTE
FM DISCRI
GND
PLL LPF2
MPX REG
VCO
FM IN
PD1
VSS
VDD2
VDD1
AM IN
P2
IF-IN
XOUT
XIN
CE
CK
DA
CD
P0
P1
16
12
13
14
15
8
9
10
11
4
5
6
1
2
3
7
IF
COUNTER
OUTPUT
CONTROL
I/O CONTROL
REGISTER
MAIN CONTROL
PRESCALLER
PHASE
DETECT
36
35
34
33
32
31
30
29
28
27 26 25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
37
38
39
40
41
42
43
44
45
46
47
48
PHD 2
PHD 1
PHD
LD
RF O
RF I
CP
CB
CC1
CC2
FOK
SENS
C.OUT
XRST
DATA
XLT
CLK
VCC
ISET
SL O
SL M
SL P
TA O
TA M
FSET
TG2
TGU
SRCH
FE O
FLB
FGD
FDFCT
FE M
FEI
FEO
FE BIAS
F
E
EI
VEE
TED
LPFI
TEI
ATSC
TZC
TDFCT
VC
APC
LEVEL S
FOK
MIRR
RF IV AMP1
RF IV AMP2
FE AMP
TTL
IIL
FZC COMP
DFCT
IIL
TTL
IIL DATA REGISTER
INPUT SHIFT REGISTER
ADDRESS DECODER
OUTPUT DECODER
TTL
IIL
TOG1-3
BAL1-3
FS1-4
TG1-2
TM1-7
PS1-4
F IV AMP
E IV AMP
BAL1
BAL2
BAL 3
TE AMP
TZC COMP
DFCT
TM1
DFCT
FS4
ATSC
WINDOW COMP
TOG1
TOG2
TOG3
FCS PHASE
COMPENSATION
FS1
F SET
TG2
TM7
TM3
TM4
TM5
TM6
ISET
TRACKING
PHASE
PHASE
COMPENSATION
HPF COMP
LPF COMP
TG1
FS2
TM2
RF M
– 39 –
IC502
CXD2508AQ
IC503
BA5930FP
MDP
MDS
LOCK
TEST
FILO
FILI
PCO
VDD
A
VSS1
CL
TV
A
VDD1
RF
BIAS
ASYI
A
YSO
ASYE
MNT0
MNT1
MNT3
XROF
C2PO
VSS
RFCK
GFS
XPCK
XUGF
GTOP
BCKI
BCK
PCMDI
PCMD
LRCKI
LRCK
WDCK
C4M
FSTT
WFCK
EMPHI
EMPH
DOUT
DTS3
DTS2
RPWM
NRPWM
A
VSS2
A
VSS3
XT
AO
XT
AI
A
VDD3
A
VDD2
LPWM
NLPWM
VDD
DTS1
ZEROL
ZEROR
SEIN
CNIN
DATO
XLTO
CLKO
SPOA
SPOB
SPOC
XTSL
XLON
FOK
MON
ERROR
CORRECTOR
CLOCK
GENERATOR
DIGITAL FILTER &
1 BIT D/A CONVERTER
16K
RAM
SUB CODE
PROCESSOR
CPU
INTERF
ACE
SERVO
AUTO
SEQUENCER
DIGITAL
PLL
EFM
DEMODULATOR
INTERNAL BUS
ASYMMETRY
CORRECTOR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
22
23
24
25 26 27 28
29 30 31 32 33 34 35 36 37 38 39 40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
DIGITAL
CLV
D/A
INTERF
ACE
DIGITAL
OUT
61
SCOR
SBSO
EXCK
SQSO
SQCK
MUTE
SENS
XRST
DATA
XLAT
CLOK
VSS
REG.
REG IN
REG OUT
SL-IN
SL-OUT–
SL-OUT+
SL-NF
MUTE
GND
F-IN
F-OUT+
F-OUT–
SP-IN+
SP-IN–
F-NF
VCC
VCC
VREF
T-NF
T-IN
GND
T-OUT+
T-OUT–
SP-NF
SP-IN
SP-OUT–
SP-OUT+
GND
SP-OUT
4
5 6
7
3
1
2
11 12 13 14
10
9
8
27
28
26
18
20
21
22
23
24
25
19
17
16 15
+
–
–
+
–
–
+
–
–
+
–
+
–
+
–
+
–
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
MUTE
CONTROL
– 40 –
IC601
MSM6654A-542GS-KR1 (US model)
– POWER Board –
IC350
LA4601N
12
11
10
9
3
4
8
7
6
5
2
1
13
14
15
16
20
19
18
17
21
22
23
24
TIMMING
CONTROLLER
BEEP TONE
GENARATOR
MELODY
GENARATOR
17 BIT
ADDRESS
COUNTER
COUNTER
17 BIT
MULTIPLEXER
I/O
INTERFACE
ADDRESS
&
COMMAND
CONTROLLER
1M BIT ROM
EDITING ROM &
ADDRESS ROM
CONTAINS 22KBIT
DATA
CONTROLLER
ADPCM
SYNTHESIZER
PCM
SYNTHSIZER
12 BIT
DAC
LPF
OSC
8
12
7
CH
RESET
NC
NC
NC
NAR
AOUT
GND
BUSY
16/SD
15/SI
15/SI
14
VDD
XT
XT
NC
CMD
NC
NC
ST
10
11
12/PoRT0
13/PoRT1
OUT1
GND
VCC
OUT2
IN2
GND
IN1
FIL
TER
P.
P.
ST
ANDBY
10
9
8
7
6
5
4
3
2
1
PRE
DRIVE AMP
INPUT
AMP
STANDBY
SWITCH
RIPPLE
FILTER
TSD
PROTECTOR
POP NOISE
PREVENTION
CIRCUIT
REFERENCE
AMP
OUTPUT
AMP
PRE
DRIVE AMP
INPUT
AMP
OUTPUT
AMP
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