LG GSA-4167B User Manual

Page 82

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87

No

Circuit/IC

Signal

Signal/Level

mesurement-point (IC-pin or Device)

1

Power supply

Line-12V

12V

CN801-41

2

Line-5V

5V

CN801-44

3

(IC701)

reg-1.5V

1.5V

IC701-2

4

reg-2.8V

2.8V

IC703-5

5

(IC703)

reg-3.3V

3.3V

IC703-2

6

Flash-ROM

VDD : 3.3V

3.3V

37

7

(IC302)

CS

Active-Low

26

8

XRD

read-CK

28

9

DSP

VDD : 1.5V

1.5V

41, 28, 72, 130, 146, 159, 189, 193, 197

10

(IC301)

VCC(D) : 3.3V

3.3V

7, 32, 52, 58, 75, 88, 133, 148, 200, 199, 2, 53, 185,

139, 108, 8, 26

11

VCC(A) : 3.3V

3.3V

186, 166, 99

12

Clock-34MHz

33.8688MHz

106, 107

13

MRSTB

(3.3V)High

202

14

AFE

VCC : 5.0V

5.0V

8, 78

15

(IC101)

VDD : 3.3V

3.3V

22, 11, 91, 59, 69, 82

16

OP-amp

VCC : 5.0V

5.0V

8

(IC102)

17

7ch-DRV

5VCC : 5V

5V

32

18

(IC601)

VM3 : 5V

5V

26

19

VM1, 2 : 12V

12V

5, 22

20

REF : 1.65V

1.65V

42

21

Pick-up

VCC(FM) : 5.0V

5.0V

11

22

VCC(OEIC) : 5.0V

5.0V

44

23

VC(OEIC) : 2.1V

2.1V

43

24

VREF : 2.5V

2.5V

9

25

VSL25 : 2.8V

2.8V

16

26

VSA5 : 5.0V

5.0V

15

27

VSO : 5.0V

5.0V

29

* When there are twe or more power supply pins of LSI, it checks by one ramdom pin first.

PCB Poor Analysis - Check list

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