Sony CDX-L400X Service Manual ▷ View online
17
17
CDX-L400X
3-5. BLOCK DIAGRAM — DISPLAY SECTION —
KEY MATRIX
LSW900-922
LSW900-922
KEY
ACTIVE
Q664
X502
32.768kHz
15
16
12
13
5
18
20
19
4
26
91
98
6
SYSTEM CONTROL
IC501 (3/3)
LCD DRIVE
IC901
KEY IN0
LCD SO
LCD CKO
LCD CE
POWER
CONT
Q661,662
KEY IN1
KEY ACK
AD ON
RC IN1
RC IN0
ILL +B
XIN
XOUT
OSC OUT
93
ILL ON
BATT
OSC IN
X501
18.432MHz
64
63
62
LCD901
DI
CL
CE
LED921,922
PL901,902
18
18
CDX-L400X
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
14
3-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION — • Refer to page 14 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
• 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
: MW
J
: CD
for printed wiring boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
a
: Through hole.
•
: Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
Replace only with part number specified.
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.
19
19
CDX-L400X
(Page 21)
B
E
C
+
-
+
-
+
-
( )
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
14
Ref. No.
Location
IC1
E-7
IC2
H-7
Q1
C-5
• Semiconductor
Location
20
20
CDX-L400X
IC B/D
IC B/D
TP77
TP78
TP78
R29
R30
R30
C1
C5
C43
TP79
TP80
TP80
TP81
TP82
TP83
TP84
TP82
TP83
TP84
CN2
CN3
TP85
CN1
SW3
M902
M901
SW4
TP1
SW2
SW1
TP2
TP3
M903
TP87
TP86
Q1
TP9 TP8
R3
R26
C4
C6
C3
TP10
C13
R5
C11
C15
C10
C8
C16
C7
TP7
TP92
R6
TP15
TP14
TP17
TP20
TP16
TP19
TP20
TP16
TP19
C21
C22
R25
TP21
TP18
BP4
BP3
R24
R7
TP6
C17
FB1
TP11
TP12 C9
C14
TP89
C19
C20 C23
R9
R8
C24
TP22
TP23
TP24
TP25
C28
TP88
FB4
C41
C26
C27
C29
C31
C34
C25
TP31
BP1
BP2
TP33
TP32
R14
R15
TP30
R12
R10
C30 TP91
C37
TP90
TP29
TP28
TP26
TP27
R21
R22
C39
C36
TP34
TP35
TP36
TP46
TP37
TP38
TP39
TP40
TP41
TP42
TP43
TP44
TP45
C35
FB2
CN1
R18
R19
R20
R17
TP66
FB7
FB6
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
C38
IC1
FB5
X1
C18
R31
C44
C40
TP4
TP5
IC2
• Refer to page 14 for Waveforms and page 18 for Common Note on Schematic Diagram.
3-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 26 for IC Block Diagrams.
Note:
• Voltage is dc with respect to
ground under no-signal conditions.
no mark : CD PLAY
no mark : CD PLAY
(Page 22)
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