LG Electronics 42LT640H-ZA service manual Control Ir & Led, LGE Internal Use Only

CONTROL

IR & LED

IR_OUT_CTRL

+3.5V_ST

R620

R622

10K

10K

1%

1%

R612

L600

BLM18PG121SN1D

KEY1

100

R613

L601

KEY2

100

BLM18PG121SN1D

C600

C601

D600

D601

0 . 1 u F

0 . 1 u F

5.6V

5.6V

200pF

200pF

P601

12507WR-10L

+3.5V_ST

1

L602

+3.5V_ST

BLM18PG121SN1D

2

R614

+3.5V_ST

C602

C603

3

47K

0 . 1 u F

1000pF

R608

OPT

16V

50V

NEC_IR

22

R623

+3.5V_ST

4

47K

C

R621

Q607

10K

R625

5

2SC3052

B

47K

E

OPT

OPT

R624

OPT

C

47K

6

B

E

+5V_ST

Q608

C606

2SC3052

ZD600

7

100pF

R615

50V

5.48VTO5.76V

R629

0

1.5K

8

LED_R/BUZZ

R607

R603

10K

R630

22

10K

9

IR_OUT_RS232C

OPT

C

R616

Q603

10K

10

2SC3052

B

E

11

+5V_ST

OPT

R626

SENSOR_SCL

100

R609

R604

C607

ZD601

10K

IR_OUT_HDMI1

22

18pF

5.48VTO5.76V

50V

OPT

OPT

R617

C

OPT

Q604

10K

R627

2SC3052

B

100

E

SENSOR_SDA

R600

C

30K

Q600

C608

ZD602

B

2SC3052

18pF

5.48VTO5.76V

E

50V

OPT

OPT

+5V_ST

R610

R605

10K

IR_OUT_HDMI2

22

C

R618

Q605

10K

2SC3052

B

R601

E

C

30K

Q601

B

2SC3052

E

+5V_ST

R611

R606

10K

IR_OUT_SIDE_HDMI

22

C

R619

Q606

10K

2SC3052

B

E

R602

C

30K

Q602

B

2SC3052

E

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.

EMEA INTERACTIVE

GP4_MSTAR	2011 . 08 . 21
IR/CONTROL	6	2 0

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