Read Sony CDX-S2020 Service Manual online
15
15
CDX-S2020
CDX-S2020
3-3. BLOCK DIAGRAM — DISPLAY SECTION —
S900-921
KEY
ACTIVE
Q664
REMOTE
RECEIVER
IC971
X502
32.768kHz
15
16
12
13
95
72
74
73
94
27
25
96
83
SYSTEM CONTROL
IC501 (3/3)
LCD DRIVER
IC901
KEYIN0
DATA
CLK
CE
LCDSO
LCDCKO
LCDCE
KEYIN1
KEYACK
XKEYON
RCIN0
SIRCS
XIN
XOUT
OSCOUT
OSCIN
X501
27MHz
63
64
62
COM1
COM4
LCD
LCD901
PANEL +B
PANEL +B
LED900-921,951,952
LED931,932
(LCD BACK LIGHT)
D502
D501
51
|
54
|
S1
S46
|
DI
CL
CE
PANEL +B
KEY
ILLUMINATION
(
)
KEY MATRIX
1
VLCD
CONTROL
IC981
2
2
I
25
•
27
I
38
•
40
I
49
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. (p: pF)
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
: MW
J
: CD
for printed wiring boards:
• 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 layers' 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)
— Servo Board —
(MODE: CD PLAY)
1
IC1
wd
(XTAL)
1.2Vp-p
0V
0V
Approx. 620mVp-p
Approx. 200mVp-p
16.9344MHz
3
IC1
od
(FEO)
2
IC1
uj
(AGCI)
4
IC1
oh
(TEO)
0.85V to
1.45Vp-p
1.45Vp-p
Ver. 1.1
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