LG Electronics 42LT640H-ZA service manual IC501, NTP-7500L

AMP_RESET

R521

C516

10K

1000pF

+3.3V_Normal

50V

50V

22000pF

+24V_AMP

OPT

AUD_MASTER_CLK

C517

L502

R507

3 . 3

BLM18PG121SN1D

OPT

+24V

+24V_AMP

OUT1A 2

OUT1A 1

PVDD1 3

PVDD1 2

PVDD1 1

C519

C521

C523

C525

PGND1A

VDD IO

GND IO

/RESET

0 . 0 1 u F

C515

0 . 1 u F

0 . 1 u F

10uF

C514

BST1A

50V

CLK I

50V

50V

35V

10uF

0 . 1 u F

L501

10V

[ E P ]

16V

CIS21J121

AD

D501

1N4148W

R508

R515

100V

12

12

C501

C502

C506

C508

C510

C512

OPT

C530

10uF

0 . 1 u F

10uF

0 . 1 u F

0 . 1 u F

0 . 1 u F

10V

16V

390pF

50V

50V

10V

16V

50V

48

47

46

45

44

43

42

41

40

39

38

37

C504

1000pF

C503

50V

AGND_PLL

OUT1B_2

C531

100pF

1

36

D502

390pF

50V

50V

1N4148W

R509

R513

AVDD_PLL

OUT1B_1

R505

2

35

100V

12

12

THERMAL

OPT

3.3K

DVDD_PLL

3

34

PGND1B

49

C526

LF

BST1B

22000pF

4

IC501

33

50V

DGND_PLL

5

32

VDR1

NTP-7500L

OPT

GND_1

6

31

VCC_5

C511

10uF

C513

10V

0 . 1 u F

DGND

AGND

16V

7

30

DVDD

8

29

VDR2

C528

C529

C534

SDATA

BST2A

9

28

1uF

1uF

1uF

AUD_LRCH

25V

25V

25V

WCK

PGND2A

10

27

C527

AUD_LRCK

BCK

OUT2A_2

22000pF

11

26

50V

AUD_SCK

SDA

OUT2A_1

AMP_SDA

R503

100

12

25

AMP_SCL

R504

100

13

14

15

16

17

18

19

20

21

22

23

24

+3.5V_ST

C507

C509

33pF

33pF

50V

50V

SCL

/FAULT

MONITOR0

MONITOR1

MONITOR2

BST2B

PGND2B

OUT2B 1

OUT2B 2

PVDD2 1

PVDD2 2

PVDD2 3

+24V_AMP

D503

R510

R514

R502

1N4148W

12

12

R520

100V

10K

R506

10K

OPT

C532

C

100

390pF

R501

C505

50V

10K

B

Q501

1000pF

C520

C522

C524

AMP_MUTE

50V

MMBT3904(NXP)

0 . 1 u F

0 . 1 u F

10uF

C533

390pF

E

50V

50V

35V

D504

50V

C518

1N4148W

R511

R512

22000pF

100V

12

12

50V

OPT

OPT

R522

POWER_DET

0

L505

10.0uH

L506

10.0uH

L503

10.0uH

L504

10.0uH

C535

0 . 4 7 u F

50V

C536

0 . 4 7 u F

50V

C537

0 . 1 u F 50V

C538 0 . 1 u F 50V

C539

0 . 1 u F

50V

C540

0 . 1 u F

50V

SPK_L+

R516

4.7K

SPEAKER_L

R517

4.7K

SPK_L-

WAFER-ANGLE

SPK_L+	4
SPK_L-	3
SPK_R+	2
SPK_R-	1

P501

SPK_R+

R518

4.7K

SPEAKER_R

R519

4.7K

SPK_R-

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.

Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes

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GP4_MSTAR	2011 . 08 . 21
AUDIO AMP	2	2 0

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