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- 102 -
SCHEMATIC DIAGRAM AND CHECK POINT FOR WAVEFORM (Hi-Fi/DEMODURATOR)
IC701
LA72646SM-MPB
HI-FI/AUDIO/CANAL SW IC
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
23
24
25
26
27
28
29
3
30
31
32
33
34
35
36
37
38
39
4
40
41
42
43
44
45
46
47
48
49
5
50
51
52
53
54
55
56
57
58
59
6
60
61
62
63
64
65
66
67
68
69
7
70
71
72
73
74
75
76
77
78
79
8
80
9
C710
4.7
16V
KANP
C709
4.7
16V
KANP
IC801
TDA9874AH
NICAM or G STEREO IC
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
23
24
25
26
27
28
29
3
30
31
32
33
34
35
36
37
38
39
4
40
41
42
43
44
5
6
7
8
9
X801
24.576MHz
100CT02401
C707
10
16V
KA
C705
2.2
50V
KA
C706
2.2
50V
KA
C713
47
16V
KA
C727
10
16V
KA
C724
22
16V
KA
C717
10
16V
KA
C720
10
16V
KA
C732
22
16V
KA
C729
4.7
50V
KA
C714
4.7
50V
KA
C703
4.7
50V
KA
C814
22P
CH
C810
22P
CH
C735
470PCH
C740
0.1 F
C715
0.01
B
C813
0.01
F
C812
0.01
F
C819
47P
CH
C817
0.01
F
C806
0.01
F
C805
0.01
F
C804
0.1
B
C822
47PCH
C738
0.01 B
C721
0.1
F
C726
0.0056
B
C728
0.0047
B
C712
1 F
C734
0.1 F
C828
0.1
F
C826
0.1
F
C722
0.1
F
C711
0.1
F
C736
0.0047
B
C731
0.0056
B
C702
0.001 B
C701
0.001 B
R808
100
1/4W
R809
100
1/4W
R715
22K
R716
2.2K
R714
4.7K
R712
6.8K
R713
5.6K
R710
47K
R807
8.2K
R709
56K
R719
47K 1/4W
R718
47K 1/4W
R720
5.6K
R721
5.6K
R707
1K
R701
56K
R702
47K
R703
47K 1/4W
R725
1K
R717
1K
R705
5.6K
R706
4.7K
R704
6.8K
R711
47K
R708
1K
C739
47
6.3V
KA
C737
22
16V
KA
C807
2.2
50V
KA
C809
2.2
50V
KA
C816
1
50V
KA
C803
47
6.3V
KA
C802
1
50V
KA
C723
10
16V
KA
C730
22
16V
KA
C725
4.7
50V
KA
C733
47
6.3V
KA
C823
47
6.3V
KA
W822
W821
W828
W817
W829
W830
W831
W832
W818
W819
W833
W823
W820
W825
W826
W827
L703
22uH 0305
L801
22uH
0305
L701
22uH 0305
L702
22uH 0305
DURING PLAYBACK.
MEASURED WITH THE DIGITAL TESTER
NOTE:THE DC VOLTAGE EACH PART WAS
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
AUDIO SIGNAL(REC)
AUDIO SIGNAL(PB)
NORMAL_AUDIO_IN
NORMAL_AUDIO_OUT
HF1
HF2
HF_COM
HIFI_REC_MUTE
HIFI_ENV.DET
HIFI_H.SW
IIC_CLK
IIC_DATA
A_MUTE-H
C
C
SWD_AUDIO_L
SWD_AUDIO_R
HIFI_A_OUT_L
HIFI_A_OUT_R
DEC_AUDIO_L
DEC_AUDIO_R
TU_AUDIO_OUT
SIF
RADIO_A_OUT_L
RADIO_A_OUT_R
P.CON+5V
P.CON+9V
AT+5.2V
GND
FRONT_A_IN-L
FRONT_A_IN-R
TU_AUDIO_OUT
IIC_DATA
IIC_CLK
A_MUTE-H
SIF
P.CON+5V
AT+5.2V
HIFI_H.SW
IIC_CLK
IIC_DATA
RADIO_A_OUT_R
RADIO_A_OUT_L
C
AT+5.2V
SWD_AUDIO_R
FRONT_A_IN-R
HF2
DEC_AUDIO_R
HF_COM
DEC_AUDIO_L
HF1
HIFI_A_OUT_R
HIFI_ENV.DET
HIFI_A_OUT_L
HIFI_REC_MUTE
NORMAL_AUDIO_OUT
NORMAL_AUDIO_IN
C
SWD_AUDIO_L
FRONT_A_IN-L
P.CON+9V
FROM/TO OPERATION/DISPLAY
FROM/TO REGULATOR
FROM/TO 21PIN/TUNER
FROM/TO SYSCON
FROM/TO Y/C/AUDIO/H.AMP
NC
NC
NC
NC
NC
NC
NC
OUTL
NICAM
TP1
PCLK
NICAM
TP2
NC
VSSD2
VDDD1
VSSD1
VSSA1
VDDA1
OUTR
SIF1
VREF1
SIF2
TEST1
VDEC
VSSA2
ADDR2
IREF
TEST2
TP3
VDDA3
VSSA3
CRESET
XTALI
XTALO
ADDR1
SYSCLK
MONOIN
P1
VSSD3
VDDD3
SCK
WS
P2
OUTM
VSSA4
VREF2
EXTIL
EXTIR
SDO
SDA
SCL
G STEREO
LF2
OUTR
OUTL
IFINT
AF1O
AF1I
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
PIN
3
2
1
NC
OUTM
P2
VREF
EXTL
EXTR
EXTM
P1
NC
CID
CTRIG
AF21
AF20
LPF
SDA
SCL
VCC
DGND
CAF2
CAF1
NC
NC
MAD
NC
NC
NC
NC
XTAL
LF1
AFR
NC
NC
NC
AGND
CDE2
NC
NC
CDE1
TDA9873H
NC
NC
1.6
5.0
2.5
1.7
0
2.4
2.4
4.9
4.9
0
0
1.5
1.6
1.6
0
2.0
3.3
2.0
2.0
1.9
1.4
1.6
1.6
1.6
NC
NC
NC
NC
NC
1.2
4.8
0
4.8
0
0
0
0
0
0
0
0
0
0
2.5
2.5
2.5
2.5
0
0
NC
NC
NC
NC
NC
NC
NC
NC
NC
2.1
2.1
0
2.6
5.1
3.0
3.8
0
1.2
1.4
2.5
3.0
3.0
3.0
3.0
0.2
5.1
0
0
0
0
0
0.1
0.1
0.1
0.1
0.1
0.1
0.1
2.0
0
0
0
0
2.5
0
2.5
2.5
0.1
0
0.1
2.5
0.1
1.7
4.5
4.5
0
4.4
0
4.4
0
2.5
9.7
2.5
5.1
2.1
0.1
1.8
0.1
0
0.1
0
2.7
2.4
5.1
2.5
0
2.7
2.7
2.7
2.7
0.1
2.1
0
0
2.6
5.1
0
2.5
3.0
NC
NC
NC
NC
NC
NC
NC
MUTE
ALC
OUT
SEL
SW
ALC
A GND
D.C
SW
ALC
D.C
A GND
ALC
ALC
VREF
R-CH
PNR
LOGIC
HOLD
PULSE
SW
NOISE
NOISE
DET
REC-H
REC-H
PB AMP
PB AMP
COMP
LIM
R-CH
BPF
L-CH
BPF
COMP
ENV
DET
D0 DET
DEV
VCO
LPF
MIX
LIM
L-CH
IN SEL
IN SEL
R-CH
NC
NC
TDA9874AH
NC
NC
NC
44
42
43
45
46
Show page 115 - 119 the waveform of mark position.