42LM3400 (CHASSIS:LT21C) - LG TV Service Manual (repair manual). Page 39

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.

2011/10/04

HEADPHONE

15

GP4L_S7LR2

R1500

3.3K

HEAD_PHONE_POP

C1500
10uF
16V

HEAD_PHONE

C1501
10uF
16V

HEAD_PHONE

JK1500

KJA-PH-0-0177

HEAD_PHONE

3

DETECT

4

L

5

GND

1

R

+3.3V_Normal

R1504
10K

HEAD_PHONE

C1503
1000pF
50V

OPT

HP_LOUT

R1503
1K

HEAD_PHONE

HP_DET

+3.5V_ST

HP_ROUT

SIDE_HP_MUTE

R1501
1K

HEAD_PHONE

C1502
1000pF
50V

OPT

R1502

1K

HEAD_PHONE

Q1502
MMBT3904(NXP)

HEAD_PHONE_POP

E

B

C

Q1503

MMBT3904(NXP)

HEAD_PHONE_POP

E

B

C

Q1505

MMBT3904(NXP)

HEAD_PHONE_POP

E

B

C

Q1504

MMBT3904(NXP)

HEAD_PHONE_POP

E

B

C

Q1501

MMBT3906(NXP) 

HEAD_PHONE_POP

E

B

C

Q1500

MMBT3904(NXP)

HEAD_PHONE_POP

E

B

C

JK1500-*1
PEJ031-01

HEAD_PHONE_32LS3500

3

DETECT

4

L

5

GND

1

R

Headphone  *Option : HEAD_PHONE