42LH90QR (CHASSIS:LP91C) - LG TV Service Manual (repair manual). Page 23

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.

4.7K

R421

2SC3052

Q405

IR-OUT

E

B

C

ZD402

SUB_SDA

+5VST_MST

10K

IR-OUT

R427

KEY2

120ohm

L406

+3.3V_MULTI_MST

120ohm

L403

IR

2SC3052

Q404

IR-OUT

E

B

C

22

IR-OUT

R430

0.1uF

C408

ZD400

10K

IR-OUT

R429

470pF

C412

+5VST_MST

10K

IR-OUT

R428

SUB_SCL

KEY1

0.1uF

C407

READY

IR_OUT

500-ohm

L410

120ohm

L402

+5VST_MST

47uF

C406

470pF

C404

47K

IR-OUT

R426

+3.3V_MST

500-ohm

L411

4.7K

R420

0

R417

0.1uF

C411

+3.3V_MST

0

R400

READY

0.1uF

C414

ZD401

47pF

C403

12507WS-12L

P400

1

2

3

4

5

6

7

8

9

10

11

12

13

+3.3V_MST

MLB-201209-0120P-N2

L404

MLB-201209-0120P-N2

L407

CONTROL KEY

CONTROL KEY

H6 LH90

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EAX61087201
Mstar LCD LH90