Read Sharp HT-SB30 (serv.man3) Service Manual online
HT-SB30
4 – 1
CHAPTER 4. CIRCUIT DESCRIPTION
[1] Voltage
Main PWB
1. Power supply : 100-240V~50/60Hz
2. Power On condition without input
2. Power On condition without input
Pin
No.
Voltage (V)
1
0.310
2
0.320
3
0.320
4
0.012
5
0.320
6
0.320
7
0.320
8
3.870
IC 510
Pin
No.
Voltage (V)
Pin
No.
Voltage (V)
1
2.420
8
2.100
2
0.020
9
2.100
3
4.840
10
3.030
4
3.070
11
0.020
5
0.019
12
0.020
6
1.900
13
2.410
7
2.100
14
2.410
IC 520
Pin
No.
Voltage (V)
1
0.016
2
1.200
3
2.900
4
0.020
5
3.600
6
3.600
7
5.000
8
5.000
IC 450
Pin
No.
Voltage (V)
Pin
No.
Voltage (V)
Pin
No.
Voltage (V)
Pin
No.
Voltage (V)
1
3.150
9
3.020
17
0.014
25
0.014
2
3.150
10
3.100
18
3.030
26
0.014
3
3.100
11
3.150
19
0.014
27
0.014
4
3.000
12
0.014
20
3.030
28
3.150
5
0.020
13
0.014
21
3.150
29
3.020
6
2.080
14
0.014
22
3.030
30
3.020
7
3.150
15
3.100
23
3.000
31
0.014
8
3.040
16
3.150
24
3.150
32
3.020
IC 601
Pin
No.
Voltage (V)
Pin
No.
Voltage (V)
1
2.900
13
0.016
2
2.900
14
0.016
3
0.014
15
3.030
4
0.014
16
0.013
5
0.014
17
1.800
6
3.100
18
2.000
7
0.013
19
2.100
8
3.140
20
2.100
9
3.140
21
0.020
10
0.013
22
3.100
11
0.013
23
1.900
12
2.000
24
0.020
IC 406
Pin
No.
Voltage (V)
Pin
No.
Voltage (V)
1
0.014
13
0.070
2
1.800
14
0.020
3
0.020
15
0.020
4
0.020
16
0.020
5
0.020
17
0.020
6
0.020
18
0.020
7
3.040
19
0.020
8
1.800
20
0.020
9
0.020
21
1.600
10
3.090
22
0.020
11
0.020
23
1.600
12
0.020
24
0.020
IC 540
Pin
No.
Voltage (V)
1
16.760
2
5.120
3
1.300
4
0.020
5
1.230
6
16.600
7
16.600
8
16.600
IC 808
Pin
No.
Voltage (V)
Pin
No.
Voltage (V)
1
0.014
9
16.600
2
2.400
10
0.020
3
2.400
11
0.020
4
0.014
12
0.014
5
0.014
13
2.400
6
0.014
14
0.018
7
0.014
15
2.400
8
0.014
16
16.600
IC 530
Pin
No.
Voltage (V)
1
2.450
2
2.450
3
2.450
4
0.020
5
2.450
6
2.450
7
2.450
8
4.860
IC 580
Pin
No.
Voltage (V)
1
16.600
2
16.600
3
10.000
4
16.600
5
16.600
6
16.600
IC 800
Pin
No.
Voltage (V)
1
3.06
2
3.06
3
NC
4
0.018
IC 608
Pin
No.
Voltage (V)
1
5.040
2
0.020
3
5.040
4
0.017
5
3.890
IC 803
Pin
No.
Voltage (V)
Pin
No.
Voltage (V)
Pin
No.
Voltage (V)
Pin
No.
Voltage (V)
1
NC
13
1.500
25
16.000
37
16.600
2
NC
14
0.020
26
16.000
38
16.600
3
NC
15
0.020
27
0.019
39
16.600
4
3.080
16
0.020
28
0.019
40
4.800
5
3.080
17
3.030
29
16.000
41
NC
6
0.020
18
0.990
30
16.000
42
NC
7
3.130
19
3.010
31
16.000
43
NC
8
3.130
20
0.019
32
16.000
44
NC
9
0.020
21
3.010
33
0.019
45
NC
10
2.000
22
NC
34
0.019
46
NC
11
3.040
23
16.600
35
16.000
47
NC
12
3.040
24
16.600
36
16.000
48
NC
IC 901
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