42LW5500-ZE, 42LW550T-ZE, 42LW550W-ZE, 42LW551C-ZE, 42LW5590-ZE (CHASSIS:LD12C) - LG TV Service Manual (repair manual). Page 45

THERMAL

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.

C5412
22uF
10V

C5415
22uF
10V

+3.3V_FRC

R5406

3.3K

1%

L5404

3.6uH

NR8040T3R6N

R5411

4.3K

1%

R5404

20K

OPT

C5407

1uF

10V

C5409

2200pF

+12V

+1.26V_FRC

POWER_ON/OFF2_2

L5401

CIC21J501NE

R5410

27K

1%

C5414
22uF
10V

R5407

3.9K

1%

+12V

C5411

100pF

50V

OPT

R5409

10K

OPT

IC5401

AOZ1072AI

3

AGND

2

VIN

4

FB

1

PGND

5

COMP

6

EN

7

LX_1

8

LX_2

L5403

3.6uH

NR8040T3R6N

C5410

100pF

50V

OPT

R5408

12K

1%

R5405

10K

R5401

20K

POWER_ON/OFF2_2

C5406
0.1uF

R5403

10K

+3.3V_FRC

C5405
0.1uF

C5413
22uF
10V

R5412

10K

1%

L5402

CIC21J501NE

0.1uF

C5417

16V

C5421

10uF

16V

R5416

1K

1%

1uF

C5418

10V

+3.3V_FRC

+1.5V_FRC_DDR

R5414

4.3K

1%

C5420

10uF

16V

R5415

3.9K

1%

C5416

10uF

16V

C5419

560pF

50V

R5413
10K

C5408

3300pF

IC5402

AOZ1072AI-3 

EAN60922902

3

AGND

2

VIN

4

FB

1

PGND

5

COMP

6

EN

7

LX_1

8

LX_2

R5402

20K

IC5403

AP7173-SPG-13 HF(DIODES)

EAN41406705

3

VCC

2

PG

4

EN

1

IN

5

GND

6

SS

7

FB

8

OUT

9

[EP]

C5402
10uF
25V

C5404
10uF
25V

C5403
10uF
25V

C5401
10uF
25V

URSA5 Power Block

54

MStar URSA5

55

2010. 08.18

Vout=0.8*(1+R1/R2)

+3.3V_FRC

TYPICAL 300mA

Vout=(1+R1/R2)*0.8

TYPICAL 980mA

R1

R2

2A

R1

R2

CORE +1.26V_FRC

Placed on SMD-TOP

2A

Vout=0.6*(1+R1/R2)

R1

+1.5V of DDR&URSA5 uses same power line

TYPICAL 350mA

R2

+1.5V_FRC