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LG GWA-4164B Service Manual page 70

Dvd/cd rewritable drive
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Input/Output circuit diagram
Three-phase motor driver output
17
12
16
13
9
10
15
Hall signal input
28
20
50k
28
28
22
24
18k
PWM driver output SLED1, 2
37
39
BTL driver input ACT1,2,3,LD
3
4
5
46
50k
10pP
47
3
42
BTHC terminal
1
1
200k
1
100
74
18
11
28
28
2.5k
21
50k
23
5pF
25
32 33
38
40
27 36
3
5k
5pF
Reference voltage input
1k
50k
50k
10k
47k
4ch
2ch
200
Spindle driver current detection input
8
2k
8
7pF
12.5k
Splindle driver feedback filter pin
3
5k
100
40k
BTL driver output FO, TK
48
48
48
49
51
53
45
PWM driver input SLED1, 2
28
28
29
47k
30
3pF
50k
50k
Hall bias
FG signal output
113
BTL driver output LD
3
50
2
52
54
PWM driver input Spindle
28
26
47k
Control signal input
28
50k
34
35
TJ output
6
20
28
19
28
43
3
3
1
45
28
5k
5pF
28
50k
50k

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