Sony CDX-838 Service Manual ▷ View online
17
17
CDX-838
7-2.
BLOCK DIAGRAM – MAIN Section –
7-2.
BLOCK DIAGRAM – MAIN Section –
11
9
12
13
7
6
5
3
8
61
47 48 46 50
29
46
76
77
25
27
45 44 49 59
16
19
17
18
20
A
B
DATA, PCMD, BCK,
LRCK, WDCK
LRCK, WDCK
PCMD
BCK
LRCK
LRCK
WDCK
DATA
DATI
BCKI
LRCI
WDCI
4
DIN
RFCK
WFCK
XROF
C4M
C4M
XROI
XROI
SCOR
RFCK
GTOP
RFCK, GTOP, WFCK,
C4M, XROF
C4M, XROF
WFCK
WFCK
2
31, 30, 33, 32
1, 2, 24, 25
25 – 22, 40 – 36, 27
9 – 12, 14 – 18, 5
DSP
INTERFACE
DATA
LINKING
CONTROL
SELECTOR
D-RAM INTERFACE
READ/WRITE
BASE
COUNTER
VWA
ADDRESS MONITOR
CPU INTERFACE
SDTI
1
GRST
60
GSCR
SCK
DATA
GRSCOR
79
CSI
78
CSO
77
7 6 5
CCLK
CSI
76
REQ
74
BUSY
4 56
BUSY
CCLK
SCOR
WFCK
8
9
SCLK
SSI
SDTI
41 42 28 26
CLOCK
SDTO
XLT
XRDE
XWRE
XSOE
XQOK
SYSTEM CONTROLLER
IC201 (2/3)
D/A CONVERTER
IC601
05
CD TEXT DECODER
IC501
D-RAM
IC402
S-RAM
IC502
A0 – A9
D1 – D4
XTAI
TIMING
GENERATOR
D/A
CONVERTER
INTERFACE
SERIAL
INPUT
INTERFACE
DE-EMPHASIS
CONTROL
CPU
INTERFACE
CLOCK OSC/
DIVIDER
CLOCK
BUFFER
IC603
MUTING
CONTROL SWITCH
Q601, 602
LOW-PASS
FILTER
IC602 (1/2)
MUTING
Q603
LOW-PASS
FILTER
IC602 (2/2)
PWM
INTER-
POLATOR,
∆Σ
MODULATOR
DATA
D OUT
BCK
LRCK
DATA
BCK
LRCK
D-RAM CONTROLLER
IC401
DIGITAL
OUT
BUFFER
IC604
(Page 16)
D
SCLK
IC503
SBSO
(Page 16)
E
(Page 16)
G
SCOR
(Page 16)
F
DATA, CLOCK
(Page 16)
H
(Page 16)
(Page 16)
C
C16M
(Page 16)
I
(Page 18)
J
BU CHECK
(Page 18)
RESET
XRST
35
29
34
28
22
3
23
4
20 27
62 63
XRAS
XCAS
XWE
XOE
XRAS
D1 – D4
A0 – A9
11 – 13, 15 – 19
10 – 3, 25, 24, 21, 23, 2, 26, 1
11 – 18, 64 – 69, 74
DO0 – DO7
20 – 27
DATA0 – DATA7
A0 – A14
ADD0 – ADD14
XCAS
XWE
CE
CE
WE
WE
XOE
ESPXLT
XRDE
XWRE
XSOE
XQOK
GRSRT
CSO
REQ
OPTICAL
TRANSCEIVER
IC801
SW801
(ANALOG/DIGITAL SELECT)
BUCK
D501
X601
16.9344MHz
AOUTL
AOUTR
A/D.SW
XT
AL
EXT
AL
EMP
DFS
PD
EMP
ML
D/A.RESET
XTO
XTI
56
28
78
12
11
6
44
45
A.MUTE
43
47
RESET
75
4
5
18
17
8
7
9
X501
10MHz
30
29
MUTING
Q604
R
L
CN901 (1/2)
ANALOG OUT
IC801
DIGITAL OUT
RST
ANALOG
DIGITAL
GTOP
RESET
• SIGNAL PATH
: CD PLAY (ANALOG OUT)
: CD PLAY (DIGITAL OUT)
18
18
CDX-838
7-3.
BLOCK DIAGRAM – BUS CONTROL /POWER SUPPLY Section –
2
13
8
7
69
31
32
30
I
B.UP
DATA
CLK
BUSON
RST
SCK
SO
SI
68
61
BU.CHK
CD.ON
MAG.SW
MGLK
BUS.ON
W.UP
EJECT
EXTAL
XTAL
7
5
4
6
2
REGULATOR
Q303
B+ SWITCH
Q305
+5V
REGULATOR
IC305
+5V
REGULATOR
IC307
+8V
REGULATOR
IC306
MICON +5V
DAC +5V
+8V
LOW-PASS FILTER
(IC602) B+
MICON +5V
D313
RESET SIGNAL
GENERATOR
IC304
X201
8MHz
SERVO +5V
Q304
MICON +5V
MICON +5V
RST
05
SYSTEM CONTROLLER
IC201 (3/3)
(Page 17)
J
BU CHECK
(Page 17)
LEVEL SHIFT
D307
BATTERY
CHECK
Q301, 302
D308
D306
+9V
REGULATOR
IC303
REFERENCE VOLTAGE
SWITCH
Q201
ELEVATOR HEIGHT
(ADDRESS) ADJUSTMENT
D309
SERVO +9V
D311
12
1
4
11
9
6
10
M
1
7
4
5
70
58
ELV.R
ELV.F
ELEVATOR
MOTOR DRIVE
EEPROM
IC202
ELEVATOR MOTOR DRIVE
IC301
FIN
RIN
5
6
12
11
EE.DATA
EE.CLK
SDA
SCL
OUT1
OUT2
M104
(ELEVATOR)
ELV.ON
MCK
RV201
ELEVATOR HEIGHT
SENSOR
RV202
38
EHS 39
AVREF 37
RESET
SWITCH
RST
BUSON IN
CLK
DATA
LOF
SCK
SO
SI
BUSON OUT
BUSON OUT
RESET
55
48
50
49
62
64
SW301
57
SW201
MAGAZINE
DETECT
SW202
MAGAZINE IN/OUT
DETECT
BUS INTERFACE
(FOR SONY BUS)
IC302
60
CN901 (2/2)
(FOR SONY BUS)
CONTROL
RESET
Z
19
19
• Circuit Boards Location
JACK board
MAIN board
RF board
SW board
DIGITAL OUT board
7-4.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
z
: Through hole.
• b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side) the parts face are indicated.
Note on 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.
•
f
: internal component.
•
C
: panel designation.
•
U
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from CD changer controller.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD PLAY
no mark : CD PLAY
∗
: Impossible to measure
• 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.
• Signal path.
J
: CD PLAY (ANALOG OUT)
c
: CD PLAY (DIGITAL OUT)
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
pièce por tant le numéro
spécifié.
Ne les remplacer que par une
pièce por tant le numéro
spécifié.
20
20
CDX-838
7-5.
PRINTED WIRING BOARDS – RF/SW Boards –
•
See page 19 for Circuit Boards Location.
• Semiconductor
Location
Ref. No.
Location
IC11
D-7
IC51
B-9
IC52
H-4
Q11
E-8
C52
C60
C59
R62
R63
C55
R57
R58
R65
R56
C54
R61
C21
R30
R64
C31
C38
C34
R40
C26
C39
C12
C19
C18
C10
CNP53
C56
C58
C57
IC52
1-676-014-
11
(11)
RF BOARD
(COMPONENT SIDE)
R51
R53
C51
R52
R54
R31
R60
R32
RV14
C22
C24
R39
C28
R37
C25
R34
C29
R41
C35
R47
R42
R43
R45
C37
R46
C36
R44
IC11
C43
C17
C16
C14
R25
R18
R26
C15
R17
R59
C53
R50
C42
C41
R55
R49
R27
C32
C30
C27
C33
R38
R36
R35
R48
R14
R11
R22
R16
C40
R28
C23
R33
R12
R13
B C E
C13
CNJ11
Q11
1-676-014-
11
(11)
RF BOARD
(CONDUCTOR SIDE)
IC51
CNJ12
SW1
(LIMIT)
SW BOARD
1-664-104-
11
(11)
M101
(SPINDLE)
A
MAIN
BOARD
OPTICAL PICK-UP
BLOCK
(KSS-521A)
OP FLEXIBLE BOARD
1-664-626-
11
SW11
CHUCKING END
DETECT
SW12
SAVE END
DETECT
1
2
3
4
5
6
7
8
9
10
11
A
B
C
D
E
F
G
H
I
J
+
1
2
BLU
YEL
YEL
BLU
+
+
+
+
8
5
1
4
17
1
+
39
27
40
52
1
13
14
26
1
26
14
8
7
1
28
22
21
15
M
MAIN FLEXIBLE BOARD
1-679-339-
11
BP12 (FE)
TP
(VC)
TP
(FE0)
BP11 (TE)
TP (TE1)
TP
(RF)
TP (GND)
05
(Page 22)
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