Sony CDX-C680 / CDX-C780 Service Manual ▷ View online
4-4. BLOCK DIAGRAM — DISPLAY SECTION —
– 39 –
– 40 –
CDX-C680/C780
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
LSW901-909
912-918
LSW901-909
912-918
BATT
BATT
REG
IC606
INVERTER
UNIT
EL900
D819
SYSTEM CONTROL
IC501 (2/2)
LCD DRIVE
IC900
04
4-5. BLOCK DIAGRAM — TUNER SECTION —
CDX-C680/C780
– 41 –
– 42 –
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
BEEP
DRIVE
Q502
MUTE
CONTROL
Q211
POWER
CONTROL
Q601, 602
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
26 SO
27 CKO
28 CE
PLL
TUNER UNIT
TU10
SUB
VOL/
SUB
AUXINL
CDINL
FMINL
AMINL
R
L
1
3
AMP
IC11
IC11
D13
CDINL
BUS AUDIO IN
-4
-3
CN202
R
L
FRONT
-1
-2
CN201
CN201
1
CD
SECTION
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
25
23
7
24
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)
AMUT
12
7
LINE DRIVER
IC205
2
12
13
SW201
(LINE OUT/IN)
OUT IN
Q201
Q207
Q208
LINE DRIVER
IC207
REO1
FNTO1
Q214
Q215
GND
ISOLATION
IC209
GND
ISOLATION
IC210
STBY
22
MUTE
3
5
1
9
2
10
5
14
13
15
7
16
6
BATT
BATT
BU5V
ILL
CHECK
Q604
ACC
D607
D602
6
FM ON
7
4
3
2
TU ON
56
POW SEL
REG
IC603
3
1
BATT
ANT+B
BZ501
BEEP
SW502
(POWER SELECT)
OFF
ON
MODE2
MODE1
STB
9
8
COM8V
ANT+B
ANT+B
7
VCC
10 AM8V
11 FM8V
COM8V
AM8V
FM8V
POWER SUPPLY
IC602
ACC
F601
BATT
Q622
BU5V
5V REG
Q11
TU8.5V
TU5V
FM8V
AM8V
D12
(ANTENNA)
R-CH
R
L
REAR
-3
-4
R-CH
R
L
EQ OUT
-1
-2
R-CH
CN202
R
L
SUB OUT
-1
-2
R-CH
LINE
OUT/IN
POWER AMP
IC211
CN601
FL+
FL-
RL+
RL-
AMP REM
ILL
TEL MUTE
TEST
ACC
BATT
ANT REM
C780
C780
C780
C680
C680
D202
D212
1
13
1
13
D201
04
SYSTEM CONTROL
IC501 (1/2)
Signal path
: FM
: AM
: CD
: FM
: AM
: CD
– 51 –
• 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
103
Note: The components identified by mark
!
or dotted line
with mark
!
are critical for safety.
Replace only with part number specified.
Note:
• 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.
•
U
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltage 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.
• Signal path.
J
: CD
– 67 –
• IC Block Diagrams
IC1 CXA1791N-T4
+
–
–
+
–
–
APC
PD AMP
APC
LD AMP
VREF
1.25V
1
LD
2
PD
VC
–
+
+
RF
IV AMP1
3
PD1
VC
VC
–
+
+
RF
IV AMP2
4
PD2
VC
VC
–
+
+
RF
SUMMING AMP
VC
–
+
+
FOCUS
ERROR AMP
18 RFI
19 APC ON
20 VCC
VCC
17 RFO
16 FE
15 FE BIAS
–
+
+
F
IV AMP
6
F
VC
VC
–
+
+
TRACKING
ERROR AMP
14 TE
VC
5
GND
–
+
+
E
IV AMP
7
E
VC
13 EI
12 EO
VC
8
VR
VC
10
NC
11 NC
VC
9
–
+
VCC
VC BUFFER
1
2
3
4
5
6
7
8
9
10
GND
IN1
VCC
IN2
GND
N.C.
OUT2
VS
OUT1
N.C.
CONTROL LOGIC
SDTO
XSOE
SCK
SDTI
XLT
XRDE
XWRE
OSCE
A5
A6
A7
SPSL
VSS
35
36
A8
XOE
33
34
37
39
A4
38
40
41
42
43
44
45
46
47
48
32
20
21
22
23
25
26
27
29
30
31
24
XCAS
D4
D3
D0
28 D1
XWE
XRAS
XRAS
A9
VDD
A0
A1
A2
A3
17
18
19 C176
DOUT
LRCK
4
5 6
7 8 9 10 11
13
14
15 16
12
XROI
RFCK
GTOP
1
2 3
WFCK
DIN
C4M
BCKI
VSS
DATI
LRCI
WDCI
XTAO
TEST
XTAI
BCK
DATA
49
50
51
52
52
53
54
55
54
55
56
57
61
62
63
64
58
59
60
60
XEMP
XWIH
AM4
AM3
AM2
AM1
AM0
AM0
VDD
XQOK
GSCR
SCOR
SCOR
NC
NC
NC
NC
GRST
XRST
DRAM
I/F
SELECTOR
TIMING
GEN.
DAC
I/F
DIGITAL
OUT
CPU I/F
ADDRESS MONITOR
VWA
READ
BASE
COUNTER
WRITE
BASE
COUNTER
DATA
LINKING
CONTROL
DSP
I/F
IC6 LB1638MTP-T1
IC2 CXD2522R-T6
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