LG 50LN54 Series Service Manual page 29

Headphone
*Option : HEAD_PHONE
R1500 B
C
R1505 3.3K
1K B
HEAD_PHONE_POP
SIDE_HP_MUTE
Q1500
HEAD_PHONE_POP
MMBT3904(NXP)
E
HEAD_PHONE_POP
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.
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
HEAD_PHONE
HP_LOUT
C1500 OPT C
HEAD_PHONE
10uF C1502
R1501
Q1502 B
16V 1000pF
1K
50V MMBT3904(NXP)
+3.5V_ST
HEAD_PHONE_POP
E
E
HEAD_PHONE_POP
Q1501
MMBT3906(NXP)
C
HEAD_PHONE
HP_ROUT
C1501 OPT C
HEAD_PHONE
10uF C1503
R1502
Q1503 B
16V 1000pF
1K MMBT3904(NXP)
50V
HEAD_PHONE_POP
E
E
Q1504
MMBT3904(NXP) HEAD_PHONE
B HEAD_PHONE_POP
JK1500
+3.3V_Normal KJA-PH-0-0177
C
GND 5
R1504
L 4
10K
R1503
1K DETECT 3
HP_DET
HEAD_PHONE
R 1
E
Q1505
MMBT3904(NXP)
B HEAD_PHONE_POP
C
NC4_S7LRM 2012/06/20
HEADPHONE 15
LGE Internal Use Only