Sony CDX-M850MP Service Manual ▷ View online
25
25
CDX-M850MP
CN503
(ANTENNA)
1
4
ANT
L
CDL
3
R
9
RDS
TUNER UNIT
TUX501
40
12
13
15
26
SYSTEM CONTROL
IC303 (1/2)
16
5
QUALITY
13
SCL
14
SDA
7
TU MUTE
TUNER ATT
VOL ATT
28 I2C SIO
27
27
17
I2C CKO
DAVN
73 TU ATT IN
82 VSM
MUTE
SCL
SDA
R-CH
AML
32 AC OUT L
31 AC IN L
8
MUTE CONDITION
6
S-METER
17
SDA
33 EESIO
16
SCL
34 EECKO
RDS DECODER
IC502
MPX
OSCD
OSCI
4
5
X501
4.3MHz
9
SDA
SCL
19 NS MASK
80 QUALITY
10
DAVN 8
4 PDL
42 MDL
ELECTRONIC VOLUME
IC401
25
OUT LF
24
OUT LR
17
OUT SW
14
SA CLK
16
SA OUT
66
BUS/AUX
83
SA IN
25
ATT
20
BEEP
41
AMP STB
AMPDIAG
9
XOUT
40
8
XIN
A
B
Q408
23
SA CLK
Q171
Q181
Q470
12
5
3
11
2
4
16
22
25
34
30
37
33
31
9
7
29
27
27
6
20
35
POWER AMP/POWER SUPPLY
IC201
SW1
+10V
AU+8V
+5V
DR+6V
A+5V
AU+5V
D+5V
SW2
VP2
VP1
VP
SDA
SCL
AC GND
A-ATT
STB
DIAG
DISP+B
AU8V
U-COM
MECHA
SERVO
CNP101
FL+
FL–
RL+
RL–
AMP REM
ANT REM
ATT
BATT
ILL
ACC
TEST
FR+
5
6
4
10
2
9
1
12
3
11
FR–
RR+
RR–
19
17
18
13
16
14
7
15
X301
32.768kHz
11
OSCOUT
13
OSCIN
X302
6MHz
R-CH
BATT
ILLUMI
CHECK
Q907
AU +8V
+5V REG
Q501
TU+5V
+5V
REG
IC902
SW
Q380
+4.8V
PJ401
–3
–4
R
L
AUDIO OUT
REAR
CN401
(SUB OUT(MONO))
R-CH
–5
–6
R
L
AUDIO OUT
FRONT
R-CH
–1
–2
R
L
BUS AUDIO
IN
R-CH
32
FL
RL
F901
EEPROM
TU
24
TEL ATT
69
ILL IN
68
ACC IN
63
TEST IN
Q103
ACC DET
Q102
MUTE DRIVE
Q401,402
AEP,UK,E MODEL
2
1
BUFFER
IC410
8
14
AF BUFFER
IC407
11
13
CD
SECTION
CD
SECTION
• Signal path
: FM
: AM/MW
: CD
: CD-R/RW(MP3)
• R-ch is omitted due to
same as L-ch.
4-3. BLOCK DIAGRAM — TUNER SECTION —
(Page 24)
(Page 24)
26
26
CDX-M850MP
4-4. BLOCK DIAGRAM — DISPLAY SECTION —
LED CONTROL
Q907,908
LCD2
8
9
11
10
4
2
1
3
5
4
6
8
7
BUS INTERFACE
IC301
BATT
CNP102
(BUS CONTROL IN)
6
13
2
RESET
12
1
BUS
ON
DATA
CLK
BUS ON
RST
3
BATT
CHECK
X301
30MHz
11
13
XOUT
BATT
FL DAT1
FL CLK
XIN
23 GCP2
25 GCP1
27 GCP4
28
5
4
2
1
11
GCP3
FL+
31
SYS CLK
30
SYS SI
29
SYS SO
1
SYS CE
INH
7
CNVSS
+5V
DISP CKO
117
35
33
LCD CE
LCD INH
37
36
DISPLY SYSTEM CONTROL
IC2
1
2
DISP SO/TX
99
DISP SI/RX
98
DISP CE
95
18 BU IN
65 SYSRST
64 BUS ON
31
UNI SO
UNI CKO
29
UNI SI
30
100
CNVSS
7
SIRCS 1
RESET 10
RAM BU 91
FP CTRL 2
MOT- 77
MOT+ 78
I-DET 76
OPEN SW 75
CLOSE SW 74
OPEN KEY 90
SYSTEM CONTROL
IC303 (2/2)
IC302
RESET
MT+B
MT+B
BATT
1
2
3
MOTOR+B REG
IC306
IR
RECEIVE
IC62
IR
RECEIVE
IC503
7
7
1
1
KEY IN0 85
KEY IN1 84
RC IN1 70
RC IN0 86
KEY ACK2 87
KEY ACK0 88
KEY ACK1 89
SW501
RESET
DIMMER
CONTROL
Q905
FL POWER
CONTROL
Q801,802
BATT
BATT
LED CONTROL
Q903,904
DC-DC CONVERTER
IC800
KEY IN
MATRIX
FL 900
T800
FLVDD
FL-
BATT DET
Q101
S932
(RESET)
CF 118
CLK 119
DATA
DIMMER
120
106
104
105
1
I
103
7
3
I-DET
IC308
MOTOR
DRIVE
IC307
11
6
14
3
12
16
VREF
CONTROL
Q306,307
FLD ON 92
+10V
FL+5V
+5V REG
Q914-916
I-DET
Q305
LED CONTROL
Q503,504
SW900
(OPEN/CLOSE)
S931
(OPEN)
D512
(DISC IN)
CNJ101
(REMOTE IN)
LED SW1
LED SW2
GCP
FL CONTROL
IC301
LCD DRIVER
IC1
SEG1
I
SEG95
COM1
I
COM8
21 LAT
22 BK
99 FL DAT2
3 FL DAT3
M601
(OPEN/CLOSE9
D70
D513
BUFFER
IC903
8
LINK OFF
12
6
CD MON
14
4
CD ON
16
2
CLOSE
18
OPEN
BUFFER
IC701
2
BUS ON
6
7
BUS CLK
1
5
BUS SI
3
SYS RST
BU CHK
BUS SO
CD SELF SW
72
FLON
93
CD PACK
16
CD RFOK
58
CD RST
54
SW
Q901-903
INVERTER
Q904
C
CD
SECTION
D
CD
SECTION
(Page 24)
(Page 24)
27
27
CDX-M850MP
4-5. CIRCUIT BOARDS LOCATION
tuner unit
(TUX501)
(TUX501)
DISC IN SW board
SWITCH board
LOAD SW board
DISPLAY board
SERVO board
LIMIT SW board
MAIN board
SUB board
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
c
: CD-R/RW (MP3)
• Abbreviation
CND : Canadian model
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.)
• Abbreviation
CND : Canadian model
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.
1
30MHz
IC2
qa
(XOUT)
1.5Vp-p
• Waveform
—
DISPLAY Board
—
(MODE: FM)
• Waveforms
—
MAIN Board
—
(MODE: FM)
1
3.2Vp-p
2
32.768kHz
IC303
9
(XOUT)
3
6MHz
IC303
qa
(OSCOUT)
4.3MHz
IC502
4
(OSCD)
1.8Vp-p
3.6Vp-p
IC3
yd
(XTAL)
• Waveforms
— SERVO Board —
(MODE: CD PLAY)
1
2.8Vp-p
2
IC1
uj
(RFO)
3
Approx. 200mVp-p
IC1
oa
(FEO)
4
Approx. 300mVp-p
IC1
od
(TEO)
82ns
5
IC1
wd
(XTAL)
1.7Vp-p
1.2Vp-p
59ns
28
28
CDX-M850MP
4-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION — • Refer to page 27 for Circuit Boards Location.
Ref. No.
Location
IC1
E-8
IC2
H-8
IC3
D-3
IC4
G-2
IC5
G-4
(IC6)
E-3
IC7
F-6
(IC12)
E-4
(Q1)
C-8
• Semiconductor
Location
( ): SIDE B
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
14
R154
C75
C69
C58
C65
C55
C62
C54
C53
C51
IC6
C63
C60
C112
C57
R8
R9
R5
R7
C111
C114
C3
C6
C13
C16
C19
C24
C25
C29
C34
C36
C38
C35
C22
C30
C23
C77
C15
C20
Q1
R26
C79
R3
R13
R54
R55
C44
R65
R67
R73
R76
R77
R90
R91
R92
R94
R104
R105
R106
R107
R113
R114
R115
R121
R130
FB6
JR3
JR5
JR6
JR8
JR14
L4
R97
R98
R45
R46
R47
R48
JR17
JR21
C70
C78
C67
L8
IC12
C102
C81
L6
R152
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