Panasonic SA-VK81DGCS Service Manual page 90

SA-VK81DGCS / SA-VK81DGCP
SCHEMATIC DIAGRAM - 11
MAIN CIRCUIT
+7.5V
14
LOAD_GND
13
R2978
CHANGE_SW
12
GND
11
UP/DOWN_F R2979
10
TO
UP/DOWN_R R2980
CD LOADING 9
BOTTOM R2981
CIRCUIT
8
POSITION R2982
(CN1) ON
7
SCHEMATIC +5V R2843
6
DIAGRAM - 29
OPEN_SW R2983
5
OP/CL_FWD R2984
4
OP/CL_REV R2985
3
ST_SW
R2986
2
PLAY_SW R2987
1
CN2810
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: +B SIGNAL LINE
CD8V
0
CHANGE_SW
KA_ROUT
KA_LOUT
0 UP/DOWN_F
KA_RIN
0 UP/DOWN_R
KA_LIN
0 BOTTOM_SW
0 POSITION
MIC
220 VREF+
0 OPEN_SW
0 OP/CL_FWD
0 OP/CL_REV
ST_SW
0
0 PLAY_SW
C2900
4700P
R2935 15K
R2938 3.9K
C2904 1000P
R2939
C2905
5.6K
1000P C2902 1000P
C2936
R2941
C2937
R2942
10K
3300P 4.7K
R2943 C2907
820P
10K
C2917 0.068
C2918 0.068
C2919 0.068
R2944 15K
C2921
C2922
16V100
R2969 R2952
68 68
+15V
: MIC SIGNAL LINE
: MAIN SIGNAL LINE
C2218 16V10
C2120 16V10
L2821
G0C100JA0030
80 79 78 77 76 75 74 73 72
1
2
3
4
C2899
5
50V2.2
6
7
C2901 8
560P
9
10
R2940
27K
11
12
50V2.2
IC2813
13
C1BB00000801
14
KARAOKE IC
15
C2912
0.047
16
17
18
19
C2920
20
0.047
21
16V47
22
23
C2923
24
0.1
R2945
0
25 26 27 28 29 30 31 32 33
R2946
12K
R2947
10
R2955
220
D5858
R2991
B0BC5R000009
0
90
71 70 69 68 67 66 65
C2121
50V1
64
63
C2219
62
50V1
61
60
59
58
57
R2948
0
56
55
C2935 C2934
54 0.1 16V100
53
52
C2933
50V1 C2932
51
4700P
50
49
C2931
1000P
48
47
C2930
0.068 C2929
46
0.1
45
44
C2928
43
C2927 0.1
0.068
42
41
C2926
4700P
34 35 36 37 38 39 40
C2925
1000P