Sony CDX-A251C Service Manual ▷ View online
21
21
CDX-A251C
CDX-A251C
3-5. PRINTED WIRING BOARDS — CD MECHANISM SECTION — • Refer to page 16 for Circuit Boards Location.
: Uses unleaded solder.
1
A
B
C
D
E
F
G
H
2
3
4
5
6
7
8
9
10
11
12
13
14
16
1
1-689-230-
TP67
TP68
TP70
TP69
TP47
TP48
TP45
TP46
IC6
R6
R43
R35
C16
C70
C14
C29
C30
C68
C133
C132
R16
R14
R15
C17
C72
R20
R5
R26
R147
Q3
R8
R133
R132
Q21
SW1
C66
C67
C48
C10
R27
R81
C46
R33
R44
R23
R22
R10
R17
R7
R58
R9
R62
R61
IC3
R2
R60
C7
R87
R86
R85
R144
R82
R141
R79
R25
R78
R77
R97
R98
R34
FB3
R55
FB2
C56
R24
Q2
IC1
C13
C80
C69
FB4
C18
R12
C71
C55
C54
C31
C24
C15
R30
TP4
TP3
TP5
TP64
TP11
M901
SW4
M902
M903
TP10
TP1
TP6
TP7
TP8
TP9
TP75
TP76
TP77
TP78
TP79
TP80
TP81
TP82
TP83
TP85
TP90
TP89
TP88
TP91
TP92
TP95
TP97
TP99
TP2
IC2
TP86
TP87
TP84
TP98
TP14
TP15
TP65
SW3
SW2
TP61
TP62
TP51
TP71
TP72
TP74
TP63
TP28
TP22
TP21
TP96
TP42
TP43
TP44
TP29
TP34
TP35
TP30
TP12
TP24
TP25
TP31
TP13
TP38
TP41
TP49
TP50
TP53
TP32
TP33
TP36
TP37
TP39
TP52
BP60
TP23
TP26
TP27
BP10
R37
R36
R31
R32
R65
C40
C50
C23
R64
C60
R39
R63
X2
R54
C47
R53
R38
C43
R42
R52
C36
R28
CN2
R96
R41
C20
R84
R40
R83
R80
R75
R74
R69
R70
R73
R72
R71
R67
R68
C22
R57
C26
R21
C39
C62
C58
R13
CN1
R11
C11
C12
C53
C52
C49
C45
C44
C42
C41
C33
C32
C25
C19
R1
R18
R19
R29
C51
X1
1-866-806-
1-866-806-
(Page 24)
Ref. No.
Location
• Semiconductor
Location
IC1
G-2
(IC2)
B-11
IC3
E-2
IC6
D-2
Q2
C-1
Q3
C-2
Q21
B-4
( ): SIDE B
22
22
CDX-A251C
CDX-A251C
(Page 23)
3-6. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (1/2) — • Refer to page 20 for Waveforms.
R14
R15
IC6
R132
R133
C10
TP21
TP22
TP28
TP29
TP30
TP42
TP
45
TP46
C39
R41
R40
R39
R38
R27
R25
R26
R24
R23
R22
TP33
TP32
TP37
TP36
R58
TP39
TP38
TP
47
TP48
TP41
TP35
TP34
R42
TP50
TP49
TP23
TP24
TP25
TP26
TP27
TP52
TP31
R18
C14
TP51
R57
R55
TP53
IC2
C12
C17
C56
C24
C55
C51
C53
C47
C49
C46
C
22
C20
R28
FB2
FB3
C31
C30
R36
R30
C42
C41
C72
C60
C58
R29 R19
C132
C80
C133
C26
C25
C32
C33
R33
R31
R32
R34
C36
TP43
TP44
C29
C23
C40
R37
Q2
Q3
C15
R43
C44
R44
C45
R53
R52
R54
C18
C48
C52
C19
R13
R12
C16
R16
R11
C11
FB4
CN1
X2
Q21
R35
R20
C50
C54
C43
C13
23
23
CDX-A251C
CDX-A251C
• Refer to page 20 for Waveforms.
• Refer to page 31 for IC Block Diagrams.
• Refer to page 31 for IC Block Diagrams.
3-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (2/2) — • Refer to page 34 for IC Pin Descriptions.
IC B/D
R73
R72
R71
R83
TP67
TP68
TP69
TP72
TP63
TP64
TP65
R85
R77
R68
R67
R69
R60
R61
R62
R79
R80
R81
R82
R84
R70
TP15
TP14
TP1
TP2
TP3
TP4
TP5
TP6
TP7
TP8
TP9
TP10
TP11
TP71
TP61
TP62
R64
R65
R21
TP12
TP13
R141
R147
TP74
TP75
TP76
TP77
TP78
TP79
TP80
TP81
TP82
TP83
TP84
TP85
TP86
TP87
TP88
TP89
TP90
TP91
TP92
TP97
TP98
TP99
BP60
BP10
C70
C62
C71
SW3
SW2
SW4
SW1
M901
M902
M903
C7
IC1
R96
R74
R87
TP70
R75
R97
R98
R8
R5
R6
R2
R1
CN2
R78
X1
R86
R144
IC3
R9
R63
C69
C68
C66
C67
(Page 27)
(Page 22)
24
24
CDX-A251C
CDX-A251C
3-8. PRINTED WIRING BOARD — MAIN SECTION — • Refer to page 16 for Circuit Boards Location.
: Uses unleaded solder.
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
14
RESET
BUS AUDIO IN
-1
L
-2
R
AUDIO OUT
REAR/SUB
-3
L
-4
R
(ANTENNA)
9K
10K
FREQUENCY
SELECT
AEP,UK MODEL
US,CND,E,MX MODEL
1-726-891-
11
(11)
Q651
R528
D1
C6
R2
R3
C2
C1
Q22
R29
R582
D580
R651
D651
R609
D609
Q580
D581
R583
R532
R531
JC753
C343
R534
R756
C7
C769
R1
C404
C405
C756
Q1
R537
R538
L1
IC401
R544
R507
R545
-2
-1
R546
C53
C54
C55
C56
C57
C58
C59
C60
C62
R51
R52
R53
R54
R55
R56
R57
R58
R548
C763
D719
R4
R5
R6
R7
R8
R9
R557
R551
C617
C618
C764
C765
C751
C750
C602
C12
C13
R59
Q51
R60
R61
R301
R302
C306
C308
C309
C310
FB603
FB605
FB604
R652
C771
R573
FB1
FB309
FB305
FB303
FB307
FB308
C484
C474
JC754
JC755
D511
FB562
FB563
C312
L51
R570
R12
R13
FB310
C774
YEL
YEL
C775
R575
R577
R566
JC756
R539
R675
R676
R677
R681
D617
R661
R662
R663
R664
R757
C561
D582
D583
C582
R590
D584
Q587
Q586
R591
R506
C330
C331
IC901
R901
R902
R903
R904
R905
R906
R907
R910
C901
C902
C905
IC51
R911
JC795
C917
C918
D903
R912
AEP,UK MODEL
AEP,UK
MODEL
MODEL
AEP,UK,E,MX MODEL
AEP,UK
MODEL
MODEL
US,CND,
E,MX
MODEL
E,MX
MODEL
R913
R914
C911
C912
R335
C555
C556
C462
C432
R431
C452
R451
Q451
R452
R462
C442
R432
R442
Q471
Q441
Q431
JC752
R482
Q461
R461
R441
R471
R481
Q481
R472
R331
R330
R332
JC1
R333
AEP,UK
MODEL
MODEL
JC402
JC403
R401
R405
C413
R406
R408
R407
R409
R409
R411
R410
C755
R752
Q479
C776
Q478
D479
R479
C681
C682
IC681
IC602
FB304
L301
FB302
R654
R653
C770
R509
L501
C510
R508
C508
C507
R533
R529
R518
D502
R568
US,CND,
E,MX MODEL
E,MX MODEL
US,CND
MODEL
MODEL
AEP,UK,
E,MX
MODEL
E,MX
MODEL
AEP,UK,
E,MX
MODEL
E,MX
MODEL
AEP,UK
MODEL
MODEL
C509
R517
Q664
R561
JC501
C514
C502
R558
R565
R567
C512
C501
C513
C516
JC504
R503
D501
R671
R514
R513
R505
R504
R502
R522
R521
R510
FB501
C504
R511
R512
R632
R634
R633
Q631
R584
R673
R563
R578
FB606
R581
R588
R587
R580
IC580
C580
JC502
R678
JC527
R555
D510
R554
R679
D512
R672
R519
R674
R691
R542
R692
R564
R636
R547
R553
R556
R543
C519
R601
C410
C411
FB410
FB411
C435
C445
C455
C465
R694
IC
501
JW
10
JW
11
JW
12
JW
13
JW
29
JW101
R631
JW
104
JW
105
C431
C461
C451
C3
C401
S702
C301
C302
C601
TU1
X51
X502
C758
C441
D757
D759
D760
D601
C631
JW9
D758
C754
D754
C407
C406
JW1
JW2
JW95
JW96
JW97
C305
JW91
JW115
C471
C481
JW
131
JW
132
D756
C753
C479
C412
C4
C5
C51
C511
C503
D761
D762
S502
E,MX MODEL
AEP,UK
MODEL
MODEL
AEP,UK
MODEL
MODEL
US,CND
MODEL
MODEL
US,CND,
E,MX
MODEL
E,MX
MODEL
US,CND,
AEP,UK
MODEL
AEP,UK
MODEL
AEP,UK,
E,MX
MODEL
E,MX
MODEL
JW3
JW109
JW144
JW
145
JW
146
L601
CNP301
JW
142
JW
143
JW93
JW16
JW14
JW17
JW
56
JW
50
CN601
JW120
JW
118
C623
JW18
JW82
JW
75
JW
149
JW
45
JW
125
X501
JW
6
JW
8
JW
137
JW
7
JW
30
JW
99
JW
28
JW117
JW62
JW100
JW
66
JW20
JW
60
JW44
JW88
JW
42
D753
D752
D751
JW
26
JW
71
JW
76
JW80
JW
108
JW
54
JW89
JW
103
JW
69
JW
40
JW
67
JW
86
JW
68
JW
74
JW
133
JW
126
JW154
JW155
JW
70
JW83
JW121
JW122
JW84
JW21
JW148
J330
JW15
JW
24
JW
23
JW
25
JW153
JW106
JW156
JW43
C581
TH580
CN580
J561
(BUS CONTROL IN)
JW36
JW37
JW116
JW41
JW134
JW32
JW31
JW
49
JW
48
JW
51
JW
53
JW
52
JW
127
JW119
JW65
JW87
JW
63
JW
163
JW
102
JW
141
JW
140
JW
160
JW
161
JW
162
JW81
JW129
JW130
JW128
JW150
JW72
JW124
JW
166
JW
167
JW123
JW
47
C683
JW168
JW
94
JW
169
JW111
JW39
JW92
JW27
CN701
JW139
JW138
C402
C403
JW
403
JW
164
JW
404
JW
165
JW85
JW90
C903
C752
JW
171
JW
172
D755
IC750
(REMOTE IN)
J1
FU601
(Page 21)
(Page 29)
Ref. No.
Location
• Semiconductor Location
D1
F-3
D479
E-6
D501
I-5
D502
I-7
D510
H-8
D511
F-6
D512
I-8
D580
F-11
D581
F-11
D582
F-11
D583
F-11
D584
G-11
D601
C-10
D609
D-8
D617
C-9
(D651)
C-9
D719
J-4
D751
D-7
D752
D-7
D753
D-7
D754
D-7
D755
C-8
D756
C-6
D757
C-6
D758
C-6
D759
D-8
D760
D-8
D761
D-9
D762
D-9
D903
I-3
<IC51>
H-2
IC401
E-4
IC501
H-6
IC580
H-10
IC602
I-9
IC681
E-7
IC750
B-6
IC901
H-2
Q1
F-2
<Q22>
E-2
<Q51>
G-2
Q431
C-4
Q441
C-4
Q451
C-4
Q461
D-4
Q471
C-3
Q478
E-6
Q479
E-5
Q481
C-3
Q580
F-11
Q586
G-11
Q587
G-11
Q631
H-10
(Q651)
D-8
Q664
I-7
Ref. No.
Location
( ) : AEP, UK, E, MX model
< > : AEP, UK model
< > : AEP, UK model
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