Sony CDX-MP50 Service Manual ▷ View online
21
21
CDX-MP50
3-5. BLOCK DIAGRAM — DISPLAY SECTION —
Q803
KEY
DETECT
CNP801
(REMOTE IN)
IC951
X802
32.768kHz
15
16
12
13
5
18
20
19
4
26
91
98
6
29
2
IC801 (2/2)
SYSTEM CONTROL
IC901
LCD DRIVER
KEY IN0
DATA
CLK
CE
LCDSO
LCDCKO
LCDCE
Q919
ILL ON
SWITCH
Q918
ILL B+
SWITCH
KEY IN1
KEY ACK
XKEYON
RC IN1
RC IN0
SIRCS
34 NOSE SW
XIN
XOUT
OSC OUT
92
ILLON
75
DOOR
IND
BATT
ILL B+
OSC IN
X801
18.432MHz
LED910,911
LCD BACK
LIGHT
78
77
76
COM1
COM4
LCD901
LIQUID
CRYSTAL
DISPLAY
D809
D807
(
)
LED901-906,LSW901(2/2)-917(2/2)
KEY
ILLUMINATION
(
)
65
|
68
1
I
64
S1
I
S64
|
REMOTE
CONTROL
RECEIVER
S902,LSW908(1/2)-917(1/2)
FUNCTION SWITCH
S901,903,931,LSW901(1/2)-907(1/2)
FUNCTION SWITCH
DOOR IND
SW
BATT
LED930,931
S802
(NOSE DET)
Q923,924
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/MW/LW
J
: CD
c
: CD-R/RW (MP3)
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 identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
• Waveforms
— SERVO Board —
(MODE: CD PLAY)
—
MAIN Board
—
1
2
3
4
2.8 Vp-p
59 ns
1V/DIV,20ns/DIV
5
1.2 Vp-p
82 ns
1V/DIV,40ns/DIV
Approx. 200m Vp-p
Approx. 300m Vp-p
100mV/DIV,20
µ
s/DIV
100mV/DIV,20
µ
s/DIV
500mV/DIV,1
µ
s/DIV
1.7 Vp-p
IC1
wd
(XTAL)
IC1
uj
(RFO)
IC1
oa
(FEO)
IC1
od
(TEO)
IC3
yd
(XTAL)
6
7
2V/DIV,40ns/DIV
3.2 Vp-p
54 ns
2V/DIV,20
µ
s/DIV
3.8 Vp-p
30.5
µ
s
IC801
qs
(OSCOUT)
IC801
qh
(XOUT)
22
22
CDX-MP50
3-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION — • Refer to page 18 for Circuit Boards Location.
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
14
R154
C75
C69
C58
C65
C55
C62
C54
C53
C51
IC6
C63
C60
C112
C57
R8
R9
R5
R7
C111
C114
C3
C6
C13
C16
C19
C24
C25
C29
C34
C36
C38
C35
C22
C30
C23
C77
C15
C20
Q1
R26
C79
R3
R13
R54
R55
C44
R65
R67
R73
R76
R77
R90
R91
R92
R94
R104
R105
R106
R107
R113
R114
R115
R121
R130
FB6
JR3
JR5
JR6
JR8
JR14
L4
R97
R98
R45
R46
R47
R48
JR17
JR21
C70
C78
C67
L8
IC12
C102
C81
L6
R152
Ref. No.
Location
IC1
E-8
IC2
H-8
IC3
D-3
IC4
G-2
IC5
G-4
(IC6)
E-3
IC7
F-6
(IC12)
E-4
(Q1)
C-8
• Semiconductor
Location
( ): SIDE B
23
23
CDX-MP50
(Page 26)
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
14
C68
R145
C4
C39
IC3
X2
C59
C45
R144
C41
R146
C61
C56
IC4
C40
R147
R12
R14
R15
R10
CN1
R149
C113
R142
FB2
R143
C5
C8
C9
C10
C11
C14
C18
C21
C1
C27
C17
IC5
IC1
IC2
C43
R30
R29
R50
R51
CN3
R52
R53
R150
R151
R153
JR1
R64
R68
R69
R70
R71
R72
R74
R75
R78
R81
R82
R83
R84
R85
R86
R87
R88
R89
R93
R95
R96
R100
R102
R103
R109
R111
R116
R117
R118
R124
R126
R127
R128
R129
R131
R132
R133
R134
R135
R136
R148
JR12
JR13
JR15
FB3
X1
IC7
R119
R49
RB1
RB2
CN2
SW3
SW2
SW4
CN13
SW5
24
24
CDX-MP50
• Refer to page 21 for Waveforms.
3-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (1/2) — • Refer to page 32 for IC Block Diagram.
Note:
• Voltage is dc with respect to ground under no-signal
conditions.
no mark : CD PLAY
no mark : CD PLAY
∗
: Impossible to measure
IC B/D
TP25
TP24
TP37
TP39
TP36
TP38
TP40
TP45
TP22
TP88
TP41
TP42
TP55
TP43
TP60
TP62
TP63
TP59
TP23
TP44
TP49
TP50
TP95
TP94
TP51
TP52
TP53
TP54
TP57
TP58
TP61
TP64
TP65
TP66
TP67
TP68
TP68
TP70
TP71
TP72
TP73
TP74
TP75
TP76
C3
C4
C9
C10
C11
C13
C15
C16
C17
C18
C19
C24
C25
C27
C35
C36
C38
C40
C41
C45
C51
C53
C55
C57
C60
C61
C62
C63
C69
C75
FB2
IC1
IC6
JR12
L4
R3
R8
R13
R26
R50
R51
R53
R54
R55
R64
R67
R68
R69
R70
R71
R72
R82
R83
R84
R85
R88
R89
R90
R91
R116
R148
R149
R152
R153
RB1
RB2
TP7
TP12
TP11
TP89
TP10
TP9
TP8
C8
R9
R29
R30
C1
C5
TP81
TP82
TP83
TP84
TP80
TP79
TP78
TP77
R48
R47
R46
R45
R81
R86
R87
R49
C20
C23
R97
R52
R92
R77
R76
R76
R75
R95
R94
R94
R93
JR13
R117
R118
C14
R5
C67
JR15
CN1
FB3
JR5
JR1
JR6
JR3
X1
CN13
CN3
SW4
M902
Q1
C68
C43
C54
R96
R78
R74
R73
L8
C65
C56
JR14
CN2
C6
C78
R150
R151
C29
C39
C34
C44
TP56
C81
R147
R145
R143
R146
R144
R142
R65
C58
C77
IC7
C59
L6
IC4
JR21
IC5
C79
R98
FB6
(Page 25)
(Page 25)
(Page 28)
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