Sony CDX-M770 Service Manual ▷ View online
37
37
CDX-M770
AJ1
(ANTENNA)
1
10
2
ANT
MPX
FL
RL
SR
ADL
8
AMDET
9
RDSDET
ANT
TUNER UNIT
TUX201
FM AMP
Q202
NOISE
CANCEL
IC201
Q203
13
11
15
14
20
21
17
18
31
50
56
7
6
SYSTEM CONTROL
IC501 (2/3)
16
20
DC-DC
CONVERTER
IC306
5
1
8
14
S METER
VSM
NS MASK
52 MPTH
75 DAVN
75 DAVN
QUALITY
VOL ATT
EXT ATT
QUAL
SCL
SDA
S METER
MP IN
AM
MPX
38 AC OUTL
35 SWINR
33 AC INLR
34 ACIFLR
12
SDA
70 I2CSIO
13
SCL
71 I2CCKO
17
SDA
10 E2PSIO
18
SCL
11 E2PCKO
RDS DECODER
IC202
MPX
OSCO
OSCI
LV IN
4
5
X201
4.3MHz
9
SDA
SCL 10
MPTH 2
DAVN 8
3
30
BUSL
OUT FL
7 AUXL
ELECTRONIC VOLUME
IC305
29
OUT RL
25
SWR
55
ST-BY
16
TEL ATT
95
ILL IN
81
ACC IN
73
X1A
74
X0A
84
TEST IN
83
PW ON
92
X0
93
X1
114
TUN ON
ATT
DISPLAY
SECTION
SECTION
3
CD
SECTION
4
IC310
3
5
1
7
LINE
AMP
AMP
IC304
3
5
1
7
PRE
AMP
IC307
Q301
Q303
Q305
Q309
MUTE
CONTROL
Q310,312
12
5
3
11
22
4
9
7
POWER AMP
IC309
MUTE
STBY
CNP101
FL+
FL–
RL+
RL–
TEL MUTE
ILL
ACC
TEST
FR+
13
14
7
15
4
10
2
9
1
12
3
11
AUDIO 8.5V
FR–
RR+
RR–
5
AMP REM
6
ANT REM
16
BATT
X501
32.768kHz
X503
3.68MHz
ILLUM CHECK
Q407
POWER
CONT
Q401
ACC CHECK
Q405
POWER
CONT
Q110,111
Q406
R-CH
BATT
BATT
9V
TUNER 8V
POWER
CONT
Q107,108
9V
POWER
CONT
Q306-308
BATT
Q402
Q404
PJ301
PJ401
–1
–2
R
L
SUB OUT (MONO)
–3
–4
R
L
AUDIO OUT
REAR
R-CH
–5
–6
R
L
AUDIO OUT
FRONT
R-CH
–1
–2
R
L
BUS AUDIO IN
R-CH
53
AEP,UK,E
FL
RL
F901
• Signal path
: FM
: AM/MW
EEPROM
R-CH
CN303
AUX
FN
L
R
-11V
+11V
5
7
• R-ch : same as L-ch.
4-4. BLOCK DIAGRAM — TUNER SECTION —
(Page 38)
(Page 36)
38
38
CDX-M770
BUS SI
BUS CLK
BUS ON
BU CHECK
LINK OFF
SIRCS
D70
D708
S RST
UNI SO
BUF
IC701
7
IR
RECEIVE
IC62
7
IR
RECEIVE
IC901
7
16
16
6
LCD DRIVER
IC60
100
99
97
98
100
99
97
98
86
X701
18.43MHz
INH
CLK
DATA
CEO
INH
CLK
DATA
CEO
DIMMER
85
LED SW1
85
86
XTAL
LINK OFF
RES
BU IN
BUS ON
UNI SCK
UNI SI
UNI SO
EXTAL
66 CEO
69 INH
64 CKO
70
52
CEI
71 CE2
LCD9V
ILL ON
9V
33
SP LAT
62
RX
46
LED SW1
47
LED SW2
57
BOOT
SP-SI
SP CKI
60
LCD SO/TX
POWER
CONT.
Q109,112
VREF
CONT.
Q651,652
I
DET
Q650
SHIFT
Q105
POWER
CONT.
Q101,102
POWER
CONT.
Q120,121
POWER
CONT.
Q117,118
LED
DRIVE
Q901,902
REG
IC652
MT +B
KEY IN
MATRIX
AD ON
CONT.
Q807
BATT
BU 5V
CD 6V
9V
CD 6V
LCD 9V
MT +B
FLASH W
CLOSE SW
RT
INA1
SHIFT
OPEN SW
I DET
FPCRTL
MOT–
MOT+
FLSWPWON
FLS SO
FLS SI
SP LATCH
LED SW1
LED SW2
BOOT
BATT
A 3.3V
CD 6V
D 3.3V
DSP 5V
BZ501
98
61
63
101
38
34
81
50
97
SUB SYSTEM CONTROL
IC702
CD
SECTION
2
LCD1
LCD60
LCD DRIVER
IC61
98
97
99
84
INH
CE2
CLK
DATA
LED SW2
86
DIMMER
CN902
POWER
CONT.
Q1,2
LCD 9V
POWER
CONTLROL
Q3
ILL ON 9V
TX (SO)
RX (SI)
FL SW
1
3
I
DET
IC650
3
7
2
MOTOR
DRIVE
IC651
3
14
16
11
6
12
SW1001
(OPEN/CLOSE)
40
96
99
37
BEEP
DRIVE
Q502
BEEP
ON/OFF
DRIVE
Q103
15
DSP ON 108
CDON IN
16M
(384FS)
CD ON
MD ON
76
DDC ON 57
9V
ON/OFF
DRIVE
Q106
BU 5V
VOLTAGE CHECK
IC102
2
1
AND
IC902
BCK
LRCK
DATA
DSPMST
4
2
1
3.3V
REG
IC909
3.3V
REG
Q901
1
3
69
CENTER SW
100
101
82
4
KEY IN1
47
KEY IN0
46
RC IN1
72
KEY ACK
79
AD ON
80
RC IN0
48
12
115
116
106
13
98
97
2
3
OUT1 7
9
OUT2 10
INA2 14
VCC
DC/DC CONV.
CONTROL
IC101
CD 5V
REG
Q119
REG
Q114,115
BATT
REG
Q113,116
BFOT
58
BCK
75
LRCK
76
DATA
R-CH
R-CH(RR)
R-CH(FR)
ADL
SR
71
MST/SLV
77
REDY
60
XLAT
62
SYS RST
57
SCK
59
TRDT
61
RVDT
63
29
PLL 28
READY 78
LAT 35
RST
DSP
36
CKO 27
SI 25
SO 26
DAILO 27
DA3RO 54
DA1RO 29
DA3LO 52
DA2RO 43
ADL IN 35
ADR IN 46
MCK0 40
MCK1 41
5
6
2
3
9
8
LATCH
IC904
DSP
IC901
SYSTEM CONTROL
IC501 (3/3)
IC905
RL
IC906
FL
IC906
X901
16.9MHz
TUNER
SECTION
3
J651
(REMOTE IN)
M601
OPEN/CLOSE
MOTOR
CD
SECTION
1
• Signal path
: FM
: CD
100
5
7
3
1
3
1
S1002
(CENTER)
OPEN KEY
61
LSW60
OPEN
(DISPLAY BOARD)
DETACH SW
64
S1
DETACH
NOSE SW
62
D903
(DISC IN)
LCD DRIVER
IC1
POWER
CONT.
Q60,61
LCD 9V
POWER
CONTLROL
Q62
LCD
• R-ch : same as L-ch.
4-5. BLOCK DIAGRAM — DISPLAY SECTION —
(Page 36)
(Page 37)
(Page
36)
39
39
CDX-M770
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
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 layer’s patterns are not indicated.)
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
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.
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
2
3
IC1
qh
(RFO)
4
22.7nsec
IC501
uj
(LRCK)
0V
5
474nsec
IC501
ul
(PCMO)
5Vp-p
Approx. 200mVp-p
IC1
qd
(TE)
5Vp-p
0V
Approx. 620mVp-p
IC1
qf
(FE)
1.2Vp-p
6
474nsec
IC501
ia
(BCK)
5.7Vp-p
7
16.89MHz
IC501
ih
(XTAI)
3.8Vp-p
8
10MHz
IC5
ea
(X IN)
2Vp-p
• Waveforms
—
Main Board
—
(MODE: FM)
1
2
4.332MHz
IC202
4
(OSCD)
3.8Vp-p
1.1Vp-p
3
16.9MHz
IC901
r;
(MCKO)
4
32.768kHz
IC501
uf
(XOA)
3.68MHz
IC501
os
(XO)
5.4Vp-p
2.6Vp-p
5
18.432MHz
IC702
ih
(EXTAL)
3.8Vp-p
6
4MHz
IC801
4
(XOUT)
3.5Vp-p
40
40
CDX-M770
4-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION —
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