Sony CDX-C7850 Service Manual ▷ View online
59 RFDC
55 FE
57 TE
80 SSTP
89
PCMD
87
LRCK
85
WDCK
91
BCK
DIGITAL SERVO/
DIGITAL SIGNAL PROCESSOR
IC501
71 TFDR
72 TRDR
72 TRDR
73 FFDR
74 FRDR
69 SFDR
70 SRDR
79 MDP
3
PD1
4
PD2
7
E
6
F
17
RFO
16
FE
14
TE
CD5V
RF AMP, LD-APC ERROR AMP
IC1
OPTICAL PICK-UP
KSS-521A
2
PD
PD
LD
LD DRIVE
Q3
1
LD
19
LD ON
2
TR+
1
TR-
14 F+
13 F-
23
OP+
24
OP-
10
OP+
TRACKING
FOCUS
11
OP-
9
MUTE
20
OP+
19
OP-
OP IN+
OP IN-
TRACKING/FOCUS COIL DRIVE,
SLED MOTOR DRIVE
IC7
SPINDLE MOTOR DRIVE
IC601
16 S+
17 S-
M902
(SLED)
12 SRDT
3
SCOR
5
MCK
1
EXCK
2
SBSO
4
WFCK
EEPROM
IC551
11 SCLK
13 DQSY
9
DATI
10 LRCI
11 WDCI
7
BCKI
16
15
17
17
DRAM CONTROLLER
IC2
20
|
23
•
25
•
34
|
38
33
XOE
32
XCAS
27
XWE
26
XRAS
A0-A9
D1-D4
45
SDTI
84
C4M
33
DOUT
28
SCOR
27
XROF
3
C4M
2
7
1
2
2
3
4
5
5
6
1
2
3
4
5
6
8
9
10
11
12
13
14
7
8
8
9
10
11
12
13
14
DIN
59 SCOR
4
XROI
20
WFCK
7
EXCK
6
SBSO
8
SQCK
CLOK
9
SQSO
1
WFCK
42 XWRE
43 WRDE
44 XLT
10
SENS
11
SCLK
24
GFS
37
FOK
47 XSOE
48 SDTO
57 XQOK
58 GSCR
12
DATA
63
46
14
GRST
SCK
25
RFCK
21
GTOP
5
RFCK
6
GTOP
2
DATA
3
BCK
1
LRCK
16
VOUTL
CDINL
13
VOUTR
R-CH
1
LINE AMP
IC403
3
D/A CONVERTER
IC401
DRAM
IC4
X401
16.9344MHz
5
XTI
6
XTO
A0-A9
D1-D4
14
XTAI
LRCK
BCK
DATA
4
CLKO
27 DM1
4
XRAS
3
XWE
23 XCAS
22 XOE
M
12 DROUT+
13 DROUT-
M901
(SPINDLE)
25
24
M
M903
(LOADING)
M
INVERTER
9
L+
7
L-
2
LMOT1
4
LMOT2
LOADING MOTOR DRIVE
IC6
X1
10MHz
TX
SW4
(DOWN)
SW3
(LIMIT)
SW1
(DISC IN)
SW2
(SELF)
28
|
31
67 CD DATA
42 SCLK
54 FOK
55 GFS
16
43
44
44
CD SYSTEM CONTROL
IC5
57 SENS
65 SCK 2
66 SI 2
20 LD ON
62 IN SW
63 SELF SW
14 LM EJ
15 LM LOM
31 X IN
32 X OUT
17 CDMON
18 CD ON
9
DRV OE
10 D SW
45
GRSRST
ESPSDT
ESPXQOK
EMPH O
46
68
69
69
70
ESPXLT
ESPXRDE
ESPXWRE
GRSCOR
71
56
48
48
49
DATA
CLK
SCOR
ESPXSOE
64
19
59
61
52
BUS SI
BUS ON
AMUT
CD CKO
CE
51
8
60
30
RESET
BU IN
LNK OFF
BUS CLK
5
•
9
|
12
•
14
|
18
1
•
2
•
24
•
25
POWER
CONTROL
Q402, 403
5V REG
Q401
CD
CONTROL
Q404, 405
SWITCH
Q1, 5
BATT
MD5V
D/A5V
CD5V
BU5V
SWITCH
Q2, 4
LPF
IC404
MD5V
VC
BUS SI
BUS ON
AMUT
RESET
BU IN
LINK OFF
BUS CLK
53
BUS SO
BUS SO
4
TUNER SECTION
DISPLAY SECTION
DISPLAY SECTION
2
3
Signal path
: CD
: CD
TUNER
SECTION
1
04
4-2. BLOCK DIAGRAM — CD SECTION —
– 29 –
– 30 –
CDX-C7850
(Page 33)
(Page 33)
(Page 31)
(Page 31)
7
8
1
2
3
4
5
6
4
3
2
1
2
1
9
8
12
6
4
CD
SECTION
3
CD
SECTION
DATA IN
11
CLK IN
13
RESET
DATA OUT
BUS ON
10
18
17
10
24
59
76
48
72
37
19
11
90
13
14
16
18
17
19
6
7
1
8
9
92
93
73
74
10
11
77
BU IN
DATA
BUSON
CLK
BATT
RST
BUS INTERFACE
IC505
BUS
CONTROL
Q503
BACK-UP
CHECK
Q504
IR
RECEIVER
IC901
CN501
(BUS CONTROL IN)
BUFFER
Q508
BUFFER
Q501
1
SYSRST
RST
BU IN
CKIO
SO
UNI
SI
BUSON
SIRCS
DIND
RC IN0
RC IN1
REIN1
36
REIN0
35
AD ON
KEYACK
SO
CKO
LCD
CE
XO
XI
X1A
X0A
41
LCDANG
BATT
D509
BU IN
LINK OFF
BUS CLK
BUS SI
BUS ON
RESET
BUS SO
RESET
IC601
BU5V
SW801
RESET
D501
BATT
D507
LED
CONTROL
Q624, 625
BATT
D814
LED802-804
J801
(REMOTE IN)
ROTARY
ENCODER
RE900
DIMMER
CONTROL
Q628, 629
CORRENT
CONTROL
CONTROL
Q630, 631
KET ACTIVE
SW
Q801, 802
DATA
CLK
LCD
CE
32
14
INH
INH
VLC5
VLC4
VLC3
VLC2
VLC1
VLC0
GREEN
COLOR
SELECT
Q900, 902
2
AMBER
COLOR
SELECT
Q901, 903
LCD900
X501
3.68MHz
X502
32.768MHz
LCD ANGLE
CONTROL
Q621, 623
ILL
CONTROL
Q617, 619
ILL
CONTROL
Q626, 627
LED
CONTROL
Q611, 612
29
ILL ON
118
3
1
2
LED ON
47
KEYIN1
46
KEYIN0
30
DIMMER
KEY MATRIX
LSW900-909
912-918
LSW900-909
912-918
BATT
BATT
REG
IC606
INVERTER
UNIT
EL900
D819
SYSTEM CONTROL
IC501 (2/2)
LCD DRIVE
IC900
04
4-3. BLOCK DIAGRAM — DISPLAY SECTION —
– 31 –
– 32 –
CDX-C7850
(Page 30)
(Page 30)
1
2
AM ANT
FM ANT
8 FM +B
9 +B
18
40
33
32
41
42
39
16
L OUT
R OUT
12
13
20
22
19
5
AM DET
RECEIVE/SEEK
SD
STIND
S-METER
24
7
WIDE/NARROW
5
VT
10 AM +B
R-CH
Q17
Q16
MUTE
CONTROL
Q19
MUTE
CONTROL
Q205, 206
ACC
CHECK
Q608
BU
CHECK
IC604
REG
IC603
BEEP
DRIVE
Q502
MUTE
CONTROL
Q211
VOL
CONTROL
Q203
TUNMUTE
67
CKO
66
SO
64
VOLCE
68
SUB CE
80
NOSE SW
61
SW1
62
65
SW0
MUTE
118
LEDON
81
ACC IN
78
ILL IN
79
TELMUTE
58
TEST IN
15
BEEP
55
1
2
RAM BU
120
POW ON
3
WIDE
CONTROL
Q15
NARROW
CONTROL
Q14
VT
CONTROL
Q51
8.5V REG
Q12
WIDE
25 SI
1 SEEK OUT
20 SDIN
4 ST/MONO
53 VSM
4
LO/DX
11
AM IF
21
FM IF
NARROW
6
DOUT
5
DIN
4
CLK
3
CE
18 PD
9 LO/DX
1 XI
20 XO
13 IF IN
6
VCO
15 AM OSC
16 FM OSC
X10
7.2MHz
TUNER PLL
IC10
95 ATT IN
26 SO
27 CKO
28 CE
PLL
TUNER UNIT
TU10
SUB
VOL/
SUB
AUXINL
CDINL
FMINL
AMINL
R
L
1
3
AMP
IC11
IC11
3
1
IC702
CSV
IC701
D13
CDINL
BUS AUDIO IN
-4
-3
CN202
R
L
FRONT
-1
-2
CN201
CN201
1
AMUT
CSV
2
CD
SECTION
31
30
21 16 22
11
14
13
20
15
12
11
7
9
4
15
9 10
9 8 7
26
7
R-CH
TONE
CLK
DATA
CE
7
5
LINE AMP
IC203
B A
SWITCH
IC201
CLK
DATA
CE
ELECTRONIC VOLUME
IC204
ELECTRONIC VOLUME
IC202
SW802
(NOSE DET)
12
7
LINE DRIVER
IC205
2
12
13
Q201
Q207
Q208
LINE DRIVER
IC207
REO1
FNTO1
Q214
Q215
STBY
22
MUTE
3
5
1
9
2
10
14
13
15
7
16
6
5
BATT
BU5V
ILL
CHECK
Q604
ACC
D607
D602
6
FM ON
7
4
3
2
TU ON
23
CE
22
CKO
21
SO
9
RST
117
NAR
56
POW SEL
3
1
BATT
R-CH
ANT+B
BZ501
BEEP
SW502
(POWER SELECT)
OFF
ON
MODE2
MODE1
STB
9
8
COM8V
ANT+B
6
AMP+B
ANT+B
7
VCC
10 AM8V
11 FM8V
COM8V
AM8V
FM8V
POWER SUPPLY
IC602
ACC
F901
BATT
Q622
BU5V
XT
XT
AOUT
5V REG
Q11
TU8.5V
TU5V
CD
SECTION
FM8V
AM8V
D12
(ANTENNA)
R-CH
R
L
REAR
-3
-4
R-CH
CN202
R
L
SUB OUT
-1
-2
R-CH
LINE
OUT/IN
POWER AMP
IC211
CN601
FL+
FL-
RL+
RL-
ILL
TEL MUTE
TEST
ACC
BATT
ANT REM
ANP REM
D202
D212
D201
04
SYSTEM CONTROL
IC501 (1/2)
Signal path
: FM
: AM
: CD
: FM
: AM
: CD
8
2
3
23
ST
14 SI
15 SD
17 RESET
22 NAR
15 SD
17 RESET
22 NAR
X701
4.19MHz
23
24
25
4-4. BLOCK DIAGRAM — TUNER SECTION —
CDX-C7850
– 33 –
– 34 –
(Page 30)
(Page 30)
DISC IN SW board
LOAD SW board
tuner unit
(TU10)
(TU10)
SUB board
LIMIT SW board
SERVO board
MAIN board
RELAY board
KEY board
– 35 –
4-5. CIRCUIT BOARDS LOCATION
– 36 –
For schematic diagrams
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
¢
: internal component.
•
C
: panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS
AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
•
U
: 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.
• Signal path.
F
: FM
f
: AM
J
: CD
For printed wiring boards
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
®
: Through hole.
•
¢
: internal component.
• b
: 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.
The components identified by
mark
mark
! or dotted line with mark.
! are critical for safety.
Replace only with part number
specified.
Replace only with part number
specified.
Les composants identifiés par une
marque
marque
! 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.
• Waveforms
(MODE:PLAY)
1
2
3
4
5
6
7
Approx. 620mVp-p
IC1
!§
(FE)
0V
IC1
!¶
(RFO)
1.2Vp-p
Approx. 200mVp-p
IC1
!¢
(TE)
0V
IC501
&ª
(MDP)
2.6Vp-p
7.6
µ
sec
IC501
*¶
(LRCK)
5.8Vp-p
22.7
µ
sec
IC501
(¡
(BCK)
5.7Vp-p
474nsec
16.89MHz
IC501
`⁄‚‹
(XTAI)
3.2Vp-p
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