Sony CDX-CA720X Service Manual ▷ View online
17
17
CDX-CA720X
3-4. BLOCK DIAGRAM — DISPLAY SECTION —
3-5. CIRCUIT BOARDS LOCATION
LSW902,904,905,907,
911,913,915,916,918,919
S901,903,912,914,917
KEY
ACTIVE
Q551
DOOR IND
SWITCH
Q631
REMOTE
RECEIVE
RECEIVE
J561
(REMOTE IN)
IC971
X502
32.768kHz
15
16
12
13
5
18
20
19
4
26
91
98
6
29
SYSTEM CONTROL
IC501 (3/3)
LCD DRIVE
IC901
KEY IN0
DATA
CLK
CE
LCD SO
LCD CKO
LCD CE
KEY IN1
KEY ACK
AD ON
RC IN1
RC IN0
SIRCS
92 DOORIND
34 NOSESW
XIN
XOUT
OSC OUT
OSC IN
X501
18.432MHz
100
99
98
COM1
COM4
LCD
LCD901
LCD
BACK LIGHT
SWITCH
Q904
ILL+5V
LSW902,904,905,907,
911,913,915,916,918,919
LED901,903,912,914,917
D701
LSW801(1/2)
D702
D553
KEY
ILLUMINATION
(
)
90
|
87
|
SEG1
SEG84
3
|
86
|
LCD DATA
LCD CLK
LCD CE
ILL+5V
LED932-934,942-944
(LCD BACK LIGHT)
ROTARY
ENCODER
RE901
97 REIN0
96 REIN1
Z
S552
(NOSE)
LED801
(CD WINDOW)
LSW801(2/2)
Z
KEY MATRIX
1
MAIN board
LIMIT board
SUB board
DISC IN board
SUB (CD) board
KEY board
SERVO board
tuner unit
(TU10)
(TU10)
—
Main Board
—
1
2
18.432MHz
IC501
qs
(OSCOUT)
1.8Vp-p
32.768kHz
IC501
qh
(XOUT)
5.2Vp-p
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
2
3
IC1
ts
(PACK)
IC1
uj
(RFO)
1.5Vp-p
4
Approx. 100mVp-p
IC1
oa
(FEO)
0V
5
Approx. 100mVp-p
IC1
od
(TEO)
1.8Vp-p
16.9344MHz
IC1
wd
(XTAL)
5Vp-p
0V
3.3msec
18
18
CDX-CA720X
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
14
CN2
SW5
3-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION — • Refer to page 17 for Circuit Boards Location.
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for schematic diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
%
: indicates tolerance.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
J
: CD
for printed wiring boards:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
x
: parts mounted on the conductor side.
•
a
: Through hole.
•
: Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A)
(Side A)
parts face are indicated.
Note:
The components identi-
fied by mark
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
19
19
CDX-CA720X
(Page 25)
Ref. No.
Location
IC1
E-7
IC2
H-7
Q1
C-6
• Semiconductor
Location
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
14
TP8
C4
C26
TP1
TP2
TP3
TP4
TP5
TP87
TP86
TP57
TP77
TP11
TP79
TP83
TP70
TP10
TP9
TP27
TP12
TP78
TP31
TP81
TP84
TP54
TP25
TP24
TP37
TP39
TP36
TP38
TP40
TP45
TP22
TP88
TP41
TP46
TP30
TP21
TP17
TP20
TP42
C44
TP19
TP28
TP90
C41
TP29
TP15
TP33
TP73
TP14
TP18
TP48
TP71
TP51
TP49
TP52
TP55
TP75
TP53
TP56
TP43
TP58
TP61
TP74
TP60
TP68
TP80
TP7
TP62
TP91
TP63
TP66
TP64
TP69
TP72
TP50
TP26
TP32
TP59
TP76
BP4
BP3
BP1
BP2
R8
R9
R5
R7
R12
R14
R15
R10
R17
R18
R19
R20
R22
TP92
FB5
C3
C5
C6
C8
C9
C10
C11
C13
C14
C16
C18
C19
C24
C25
C29
C34
C36
C38
C35
C22
C30
TP6
C23
C1
C27
R21
TP47
C15
C20
TP35
TP23
R6
C17
TP82
TP44
Q1
R26
TP34
TP89
R3
TP16
TP85
R31
CN1
IC1
IC2
C43
R30
R29
CN3
X1
C70
C71
20
20
CDX-CA720X
• Refer to page 17 for Waveforms.
3-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 30 for IC Block Diagrams.
(Page 23)
Note:
• Voltage is dc with respect to
ground under no-signal conditions.
no mark : CD PLAY
no mark : CD PLAY
IC B/D
IC B/D
TP77
TP78
TP78
R29
R30
C43
TP79
TP80
TP80
TP81
TP82
TP82
TP83
TP84
TP84
CN2
CN3
SW3
M902
M901
TP1
TP5
SW2
SW1
TP4
TP2
TP2
TP3
M903
TP87
TP86
TP9
TP8
R3
R26
C4
TP10
C13
R5
C11
C10
C8
TP7
TP92
R6
TP15
TP14
TP17
TP20
TP16
TP16
TP19
TP21
TP18
BP4
BP3
R7
C17
TP11
TP12 C9
C14
TP89
C19
C20
C23
R9
R8
TP22
TP23
TP24
TP25
TP88
C26
TP31
BP1
BP2
TP33
TP32
R14
R15
TP30
R12
R10
TP91
TP90
TP29
TP28
TP26
TP27
R21
R22
R31
C44
TP34
TP35
TP36
TP46
TP37
TP38
TP39
TP40
TP41
TP42
TP43
TP44
TP45
CN1
R18
R19
R20
R17
TP66
TP62
TP47
TP63
TP48
TP49
TP64
TP50
TP51
TP52
TP68
TP53
TP69
TP54
TP70
TP55
TP71
TP56
TP72
TP57
TP73
TP58
TP74
TP59
TP75
TP60
TP76
TP61
IC1
X1
C1
C5
C3
C6
TP93
TP94
TP94
TP95
TP96
TP96
TP97
TP98
TP98
TP85
C15
C16
C70
C24
C35
C38
C36
FB5
C25
C34
C71
C29
C27
C41
C22
C30
C18
Q1
SW5
IC2
CN1
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