Service manual
QT-CD131/131C
– 13 –
Figure 13 SCHEMATIC DIAGRAM (2/6)
78 9101112
• NOTES ON SCHEMATIC DIAGRAM can be found on page 8.
L802
0.68µH
R871
4.7K
C845
4.7/50
C850
0.1
R858
680
C869
0.0022
C870
0.0022
C801
0.01
R801
1K
C802
47/16
C841
0.047
R856 1.2K
R857 27K
C842
0.047
C847
0.01
IC802
LA78623ED
48
47
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
35
34
33
16
15
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
2
1
R860
1K
L801
0.82µH
C873
0.01
C843
100/10
R880
100
XL801
16.93MHz
C868
10/16
R874
100
C867
10/16
C890
100/10
R873
100
R876
10K
R875
10K
C887
0.022
R878
100
ZD801
MTZJ5.6B
C889
10/16
R877
220
Q804
S8050D
C846
330/10
C821
1/50
C851
0.022
R849
100K
D802
1N4148
R810
82K
C844
330/10
IC804
BA5914FP
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
3
2
1
R834
1K
C832
27P
R837
47K
R838
33K
C831
0.0027
R832
56K
C834
0.033
R836
47K
C833
0.001
C830
2P
R835
470
R833
5.6K
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
VO1+
VIN1
VO1–
MUTE
VO2+
VIN2G
VIN2
GND
NC
NC
VIN1G
VO2–
GND
OP OUT
OP IN +
VO3–
VO3+
VIN3
VIN3G
VCC
VCC
BIAS IN
VIN4G
VIN4
VO4+
VO4–
GND
DEFI
TAI
PDO
ISET
VVDD
FR
Vss
EMFO
EMFIN
CLV+
CLV-
HFL
TES
TOFF
TGL
JP+
JP-
PCK
FSEQ
VDD
CONT1
CONT2
CONT3
CONT4
CONT5
EMPH
C2F
DOUT
TEST3
TEST4
MUTEL
NC
LVDD
LCHO
LVSS
RVSS
RCHO
RVDD
MUTER
XVDD
XOUT
XIN
XVSS
PW
SBSY
SFSY
EFLG
SBCK
FSX
WRQ
SQOUT
RWC
COIN
CQCK
RES
TST11
16M
4.2M
TEST5
CS
TEST1
JP–
+
L
F
S
L
F
-
+
M
S
-
C
I
D
C
C
DEF
F
E
FO+
FO–
TR–
TR+
TR+
TR–
FO–
FO+
9
3
2
6
4
6
3
62
61
60
59
58
57
56
55
54
53
52
51
50
49
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
8
1
2
3
4
5
6
7
1
2
3
4
5
6
R
827
2
20K
C822
220P
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
K
E
A
B
TR–
TR+
TR+
FO+
FO–
LD
MON
F
A
B
C
K
E
LD
VR
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
VR
TR-
TR+
FO+
FO-
GND
PD
BI802
CNS802
BI801
CNS801
FO+
FO-
LD
PD
PICKUP UNIT
1
2
3
4
5
6
M
M701
SPINDLE
MOTOR
M
M702
SLED
MOTOR
SW702
PICKUP IN
1
2
3
4
5
6
SP+
SP–
SL+
SL–
PU-IN
BI803
CNS803
CNP803
CD MOTOR PWB-C
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
5
6
7
8
9
10
DIGITAL +7.4V
R-CH
L-CH
AUDIO GND
DIGITAL GND
POWER GND
P14 1 - F
TO MAIN SECTION
1
TR–
K
A
B
VVss
TEST2
V/P
F
OP IN –
+B
+B
+B
+B
+B
+B
+B
FOCUS/TRACKING
/SPIN/SLIDE DRIVER
+B
CONSTANT
VOLTAGE
REGULATOR
0V
3.5V
3.5V
2.5V
2.5V
7.4V
7.4V
0V
0V
2.7V
3.8V
3.2V
3.5V
3.5V
2.5V
0V
0V
0V
0V
2.5V
2.5V
+3.8V
-3.2V
0V