37LT760H (CHASSIS:LD2FF) - LG TV Service Manual (repair manual). Page 38

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.

IR

+3.5V_ST

+3.5V_ST

R4102

10K

OPT

+3.5V_ST

R4104

47K

R4100

0

Q4100

2SC3052

OPT

E

B

C

Q4101

2SC3052

E

B

C

R4103

47K

R4101

47K
OPT

C4102

0.1uF

C4100

0.1uF

R4114
100

P4102

12507WR-10L

1

2

3

4

5

6

7

8

9

10

11

D4101

5.6V

AMOTECH

D4100

5.6V

AMOTECH

R4126

1.5K

L4100

BLM18PG121SN1D

C4107
100pF

50V

D4106

5.6V

CDS3C05HDMI1

C4101

0.1uF

16V

D4104

5.6V

AMOTECH

R4124

100

I_SENSOR

C4103

0.1uF

16V

OPT

D4105

5.6V

CDS3C05HDMI1

KEY2

R4123

100

I_SENSOR

KEY1

R4113
100

I2C_SDA2

I2C_SCL2

+3.5V_ST

C4104

1000pF

50V

LED_R

C4108

1000pF

50V
I_SENSOR

C4109

0.1uF

16V

I_SENSOR

C4110

0.1uF

16V

OPT

L4101

BLM18PG121SN1D

I_SENSOR

+3.3V_NORMAL

I2C_SDA3

I2C_SCL3

R4127

100

OPT

R4128

100

OPT

R4132

10K

+5V_ST

IR_OUT_HDMI1

R4136

10K

IR_OUT_CTRL

+5V_ST

R4133

22

R4141

22

R4139

30K

R4143

30K

IR_OUT_RS232C

+5V_ST

R4135

30K

+5V_ST

R4144

10K

R4140

10K

R4137

22

IR_OUT_HDMI2

R4131

22

IR_OUT_HDMI3

R4117

10K

1%

+3.5V_ST

R4118

10K

1%

L4103

BLM18PG121SN1D

L4102

BLM18PG121SN1D

R4107

47K
OPT

R4130

10K

R4134

10K

R4138

10K

R4142

10K

R4108

0

NON_I_SENSOR

R4109

10K
OPT

Q4102

2SC3052

E

B

C

Q4103

2SC3052

E

B

C

Q4105

2SC3052

E

B

C

Q4107

2SC3052

E

B

C

Q4108

2SC3052

E

B

C

Q4106

2SC3052

E

B

C

Q4104

2SC3052

E

B

C

IR & KEY

Zener Diode is

close to wafer

41

IR / KEY

2011.09.26

xxLT760H-UA