Sony CDX-M770 Service Manual ▷ View online
53
53
CDX-M770
Note:
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
no mark : FM
4-17. SCHEMATIC DIAGRAM — KEY SECTION —
(Page
49)
(Page 55)
54
54
CDX-M770
4-18. PRINTED WIRING BOARD — DISPLAY SECTION —
(IC60)
B-9
(IC61)
B-11
(IC62)
A-13
LED60
A-1
LED62
A-2
LED63
A-12
LED64
B-2
LED65
B-12
(D61)
A-11
(D62)
A-2
(D63)
A-2
(D64)
A-3
(D65)
A-3
(D66)
A-3
(D67)
B-10
(D68)
A-12
(D70)
A-13
• Semiconductor Location
Ref. No.
Location
Ref. No.
Location
Ref. No.
Location
LED66
B-2
LED67
B-12
LED68
C-2
LED69
C-12
(Q60)
A-2
(Q61)
A-2
(Q62)
B-2
(
) : SIDE B
(Page 52)
55
55
CDX-M770
Note:
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
no mark : FM
4-19. SCHEMATIC DIAGRAM — DISPLAY SECTION — • Refer to page 57 for IC Block Diagrams.
IC B/D
(Page
53)
56
56
CDX-M770
1
BOOST
5 VOUT
6 LV
7 OSC
8 V+
2
CAP+
3
GND
4
CAP–
RC
OSCILLATOR
INTERNAL
VOLTAGE
REGULATOR
RC
OSCILLATOR
LOGIC
NETWORK
+2
IC306 TC7660SE0A713
IC7 LA6576L-TE-L
IC1 CXA2596M
• IC BLOCK DIAGRAMS
IC202 SAA6588T-V2-118
IC601 BA8270F-E2
1
36
FWD
2
REV
3
VCC2
4
VL0–
5
VL0+
6
VO4+
7
VO4–
8
VO3+
9
VO3–
S-GND
35 MUTE2
34 MUTE1
33 VIN4
31 VIN4+
30 VREF-IN
29 VIN1-SW
28 VREF-OUT
10
VO2+
27 REG-OUT
11
VO2–
26 REG-IN
12
VO1+
13
VO1–
14
VCC1
15
VIN1
16
VIN1–A
17
VIN1+A
18
VIN1–B
25 VIN3+
24 VIN3–
23 VIN3
32 VIN4–
INPUT
OUTPUT
CONTROL
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
+
–
+
–
–
+
–
–
+
–
+
–
+
–
+
–
+
–
AMP-A
AMP-B
VIN1/VREF SW
MUTE1
MUTE2
CH2-CH4 OUTPUT
ON/OFF
CH1 OUTPUT
ON/OFF
GND
5V REG
+
–
–
+
–
22 VIN2+
21 VIN2–
20 VIN2
19 VIN1 +B
+
–
–
+
–
1
2
3
4
5
5
6
7
8
9
10
14
13
12
11
BUS ON
SWITCH
RESET
SWITCH
BATTERY
SWITCH
BUS ON
RST
BATT
CLK
VREF
DATA
GND
VCC
RESET
BUS ON
BUS ON
CLK IN
BU IN
DATA IN
DATA OUT
1
24
HOLD
2
AGCVTH
3
LD
4
PD
5
A
6
B
7
C
8
D
9
VEE
VEE
VCC
APC PD AMP
+
–
–
+
–
–
+
–
–
+
–
–
VEE
VREF
1.25V
VCC
APC LD AMP
+
–
VC
VC
VCC
VCC
23 LC/PD
22 LD ON
21 HOLD SW
19 RF BOT
18 RFTC
17 RF I
16 RFO
10
F
15 RFE
11
E
14 FE
12
VC
13 TE
20 AGCCONT
+
–
–
+
–
–
+
–
–
+
–
–
VC
VEE
+
–
–
VC
VC
VC
VC
VC
VC
VC
+
–
–
+
–
–
+
–
–
+
–
+
–
–
VC
+
–
RF SUMMING AMP
RF EQ AMP
TRACKING
ERROR AMP
VEE
ERROR AMP
FOCUS
VC BUFFER
VCC
VEE
SCOUT
MRO
MPTH
TCON
OSCO
OSCI
VSSD
VDDD
DAVN
SDA
VREF
MPX
VSSA
VDDA
AFIN
MAD
PSWN
SCL
2
1
6
15
11
13
16
14
12
INTERFACE
REGISTER
SIGNAL QUALITY
DECODER
CLOCKED
COMPARATOR
POWER SUPPLY
& RESET
TEST
CONTROL
OSCILLATOR
& CLOCK
PAUSE
DETECTOR
MULTI
PATH
DETECTOR
57kHz
8th ORDER
BAND-PASS FILTER
RDS/RDBS
DECODER
RDS/RDBS
DEMODULATOR
IIC BUS SLAVE
TRANSCEIVER
17
18
CIN
19
LVIN
20
8
7
DATA
CLOCK
DATA
CLOCK
4
4
5
9
10
3
4
5
1
5
2
4
3
IN 1
VCC
IN 2
GND
OUT
IC902 TC7SET08FU (TE85R)
IC651 BA6288FS-E2
REFERENCE
VOLTAGE
LATCH
TRIANGLE
OSCILLATOR
VERF.
+2.5V
+2.5V
+2.5V
+
–
U.V.L.O
–
+
+
+
–
–
1
2
3
4
5
6
7
8
9
10
16
15
14
13
12
11
PWM
COMPA-
RATOR2
RATOR2
OUTPUT2
OUTPUT1
GND
PWM
COMPA-
RATOR1
RATOR1
VERF
S
R
R
VERF
VERF
ERROR
AMP2
ERROR
AMP1
VREF/2
SHORT
CIRCUIT
PROTECTION
COMPARATOR
VCC
+
REFO
S.C.P
INA2
INB2
FB2
DTC2
OUT2
VCC
GND
OUT1
RT
INA1
INB1
FB1
DTC1
CT
CONTROL
LOGIC
TSD
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GND
NC
OUT1
M BATT
VCC
CLOSE
NC
NC
RNF
NC
OUT2
NC
VREF
OPEN
NC
NC
DRIVER
DRIVER
POWER
SAVE
1
2
3
4
5
CD
NC
OUT
VDD
GND
RESET
IC101 TL1451ACDB-E20
IC102 RN5VD53AA-TL
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