Service manual
QT-CD131/131C
– 12 –
A
B
C
D
E
F
G
H
1
2
34 5
6
• The numbers 1 to 12 are waveform numbers shown in page 21.
Figure 12 SCHEMATIC DIAGRAM (1/6)
SW761
CD LID
OPEN/CLOSE
R871
4.7K
C845
4.7/50
C850
0.1
C848
1/50
R842
22
C849
0.022
Q805
S9012H
R831
1K
C701
0.022
R715
15K
R714
10K
X701
4.10M
R733 1K
R732 1K
R731 1K
R729 1K
R728 1K
R726 1K
R727
1K
R730
1K
R734
1K
R708
1K
C702
0.022
R736
1K
R713
1K
C705
0.022
C704
100/10
R711
2.7K
R710
10K
R709
1K
C811
0.1
R823
1.2K
C817
0.47/50
C820
0.0033
R825
1.2K
C819
47/16
C818
1/50
R824 10K
R830
1K
C816
0.001
R821
56K
C815
0.0047
R817
82K
R819
39K
R820
10K
R813
33K
C814
0.01
R816
1.5K
C812
330P
R815
47K
R814
10K
R829
1K
R812
15K
C813
0.1
R840
22K
R839
22K
R828
1K
C821
1/50
R810
82K
C832
27P
R
4
R
8
33
C
0
.
R832
56K
C834
0.033
R836
47K
C833
0.001
C830
2P
R835
470
R833
5.6K
C803
0.1/50
R806
100
C807
0.1/50
C806
0.033
R805
6.8K
C808
0.068
R811
3.3K
C809
0.047
R807
1K
R809
27K
C810
180P
R808
12K
C804
0.001
R804
2.2K
C805
0.033
R802
100K
R803
15K
C840
0.33/50
C839 1/50
C838 0.01
C837 10/16
C835 0.1/50
IC801
LA9241M
SERVO AMP.
48
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
R822
6.8K
GND
VREF
SLEQ
SLD
SL–
SL+
NC
SP
SPG
SP–
SPD
FIN2
FIN1
E
TD
TD–
TA
SCI
TH
TESI
TE-
TE
A GND
JP–
JP+
TGL
TOFF
TES
HFL
SLOF
CV-
CV+
RFSM
RFS-
SLC
SLI
GND
FSC
TBC
NC
DEF
CLK
CL
DAT
CE
FSS
VCC2
REFI
VR
LF2
PH1
BH1
LDD
LDS
VCC1
SEG16
COM0
COM1
COM2
COM3
VLC1
VLC2
VLC3
KIDSW AIN7
SIMUKE AIN6
AIN5
P3P40
P33
P32
P30
VREF
XCIN
XCOUT
VDD
XOUT
XIN
RESET
PU-IN P23
WRQ P22
SQOUT P21
DFR P20
D8 SL–
D7 SL+
D6 RWC
D5 COIN
D3 RES
D4 COCK
D1 MUTE
P10 POWER IN
P02
P01
P00
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
+B5V
+B
DIGITAL GND
CO IN
CQCK
RES
64
63
62
61
60
59
58
57
56
55
54
5
3
5
2
51
50
49
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
17
8
7
6
5
4
3
2
1
1 2
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
IC701
IX1015AW
SW773
FWD
R774
1.5K
SW774
REV
SW771
PLAY
SW772
STOP
R773
1.8K
R771
3.9K
R772
2.7K
R776
10K
+B
SWITCH PWB-A2
FW701
1 3
1
3
DRF
R827
220K
R826
220K
+B
LCD701
T
CD SIGNAL
C740
0.01
Q740
2SC1815GR
D740
1N4148
R741
3.3K
R740
4.7K
R743
100K
R742
1K
C741
3.3/50
R744
10K
D741
1N4148
R745
10K
+B
+B
R721
15K
R724
15K
R725
15K
R723 15K
R722 15K
R720 15K
R719 15K
R718 15K
R716
10K
MAIN PWB-A1 ( 1 / 3 )
@
JP
FD–
FD
TO
FA–
FA
FE
FE–
VSS
AVSS
P31
RWC
SL+
SL–
DRF
SQOUT
WRQ
PU IN
TB
F
SYSYTEM
MICROCOMPUTER
+B
+B
+B
LASER DRIVER
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO.
VOLTAGE
IC801
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
0V
15
14
13
47
46
45
41
40
39
38
37
36
35
34
33
44
43
42
18
17
16
50
49
48
21
20
19
53
52
51
23
22
55
54
26
25
24
58
57
56
29
28
27
61
60
59
32
31
30
64
63
62
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
0V
2.5V
2.5V
0V
0V
2.4V
4.1V
4.7V
0V
0V
5V
5V
2.5V
2.5V
0.9V
0.9V
2.1V
4.2V
0V
5V
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO.
VOLTAGE
IC802
0V
0V
1.5V
0V
2V
5V
0.3V
0V
2.5V
2.5V
0V
0V
0V
5V
0V
4.8V
5V
5V
0V
0V
2.5V
0V
41
40
39
38
37
36
35
34
33
44
43
42
15
14
13
47
46
45
18
17
16
50
49
48
21
20
19
53
52
51
23
22
55
54
26
25
24
58
57
56
29
28
27
61
60
59
32
31
30
64
63
62
PIN
NO.
VOLTAGE
PIN
NO.
VOLTAGE
2V
0V
0.1V
2.2V
0V
2.5V
0V
2.5V
0V
0V
0V
4.1V
4.1V
5V
0V
2.7V
2.4V
0V
0V
0V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.2V
2.2V
0V
0V
5V
5V
4.8V
0V
5V
0V
0V
1.5V
2.4V
2.5V
2.5V
5V
0V
0V
0V
0V
0V
0V
5V
2.5V
0V
0V
0V
5V
4.7V
2V
0V
0V
2V
4.7V
0V
5V
2.3V
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO.
VOLTAGE
IC701
0V
0V
0V
0V
0V
0V
3.9V
0V
5V
4.1V
4.1V
0V
0V
0V
0.4V
0.4V
0V
0V
0V
0V
5V
2.5V
2.5V
0V
5V
5V
0V
0V
5V
4.8V
0V
3.8V
41
40
39
38
37
36
35
34
33
44
43
42
15
14
13
47
46
45
18
17
16
50
49
48
21
20
19
53
52
51
23
22
55
54
26
25
24
58
57
56
29
28
27
61
60
59
32
31
30
64
63
62
PIN
NO.
VOLTAGE
5V
0V
0V
0V
0.4V
5V
3.1V
1.5V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
0V
0V
0V