Sony CDX-CA750 / CDX-CA750X / CDX-CA760X Service Manual ▷ View online
25
25
CDX-CA750/CA750X/CA760X
BUS SI
BUS CLK
BUS ON
LINK OFF
S RST
UNI SO
BUF
IC702 7
6
LCD DRIVER
IC901
100
99
98
86
CLK
DATA
CE
84 AMBER
85 GREEN
85 GREEN
DIMMER
RES
LINK OFF
UNI SI
UNI SO
BUS ON
UNI SCK
60 LCD DATA
64 LCD SCK
66
52
LCD CE1
LCD+B
ILL ON
BATT
57
BOOT
XTAL
EXTAL
POWER
CONT.
Q702,703
KEY IN
MATRIX
KEY
ACTIVE
Q701
COLOR
SELECT
Q901,902
FLASH ON
BOOT
98
PW ON
PW ONI
33
SA CLK
SA CLK
1
SA OUT
SA OUT
112
101
38
50
81
97
SUB SYSTEM CONTROL
IC701
CD
SECTION
2
TUNER
SECTION
3
LCD901
LED
DRIVE
Q705,706
DOOR IND
NOSESW
82
58
81
KEY IN1
BOOT
FLASH ON
47
57
KEY IN0
46
RC IN1
107
KEY ACK
79
RE901
ROTARY
ENCODER
REIN1
96
REIN0
95
ADON
80
RC IN0
48
SYSTEM CONTROL
IC501 (3/3)
85
86
X701
18.432MHz
CD
SECTION
5
J651
(REMOTE IN)
BATT
POWER
CONT.
Q402,403
POWER
CONT.
Q405,407
+6V REG
Q401
+5V REG
Q406
CD 6V
CD ON
CD 5V
MD ON
S102
(NOSE DET)
LED851
REG
Q501
BU5V
BATT
LCD+B
LED910,911
CA750
DIMMER
CONTROL
Q903
LSW901-917
LED901-906
3-4. BLOCK DIAGRAM — DISPLAY SECTION —
(Page 23)
(Page 24)
(Page 23)
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CDX-CA750/CA750X/CA760X
MAIN board
SUB board
LIMIT board
DISC IN board
SUB (CD) board
LOAD board
KEY board
SERVO board
tuner unit
(TUX201)
(TUX201)
3-5. CIRCUIT BOARDS LOCATION
27
27
CDX-CA750/CA750X/CA760X
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.
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
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.
—
Main Board
—
1
2
4.332MHz
IC201
4
(OSCD)
5Vp-p
5.1Vp-p
3
32.768kHz
IC501
uf
(X0A)
4
3.68MHz
IC501
os
(XO)
18.432MHz
IC701
ih
(EXTAL)
2.2Vp-p
1.6Vp-p
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
2
3
IC1
qh
(RFO)
1.2Vp-p
4
16MHz
IC501
ih
(XTAI)
0V
5
10MHz
IC5
ea
(X IN)
1.4Vp-p
Approx. 200mVp-p
IC1
qd
(TE)
4.2Vp-p
0V
Approx. 620mVp-p
IC1
qf
(FE)
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28
CDX-CA750/CA750X/CA760X
3-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION —
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