LG 28LN45 Series Service Manual page 26

AUDIO AMP
+3.3V_AMP
L702
0
AUD_MASTER_CLK
C702
C707
10uF
0.1uF
10V
16V
OPT
C701
C700
0.1uF
0.1uF
16V 16V
AGND_PLL
VDD_PLL
DGND_PLL
12.08.09
OPT
C704 C725
0.1uF 1uF
16V 10V
AUD_LRCH
AUD_LRCK
AUD_SCK
R703 100
AMP_SDA
R707
100
AMP_SCL
C705 C708
33pF 33pF
50V 50V
+3.3V_ST
D700
MMBD6100
A2
SB_MUTE
R701
C B
A1
10K
NTP_MUTE
Headphone block
121118
+3.3V_Normal
OPTION added for LN4500
R706
47K LN4500
R710
1K
VA703
20V
OPT
6 M6
JP700
LN4500
1 M1 JP702
3 M3_DETECT
JP703
4 M4 VA701
JP701 20V
VA702
5 M5_GND LN4500
20V
KJA-PH-1-0177-2 LN4500
JK700
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
AMP_RST
C706
1000pF
50V
+19V_AMP_VCC
OPT
R700
3.3
C712 C715 C718
0.1uF 0.1uF 10uF
50V 50V 25V
OUT1B
1 30
PGND1B
2 29
THERMAL
BST1B
3 41 28
GND VDR1
4 27
DGND VCC5
5 IC700 26
DVDD AGND
6 NTP7513 25
SDATA VDR2
7 24
0x54
WCK BST2A
8 23
BCK PGND2A
9 22
SDA OUT2A
10 21
+19V_AMP_VCC
TP700
TP701
C713 C714
TP702
0.1uF 0.1uF
50V 50V
C710
22000pF
50V
R705
10K
R709 100
C
Q700
MMBT3904(NXP)
C709
1000pF
OPT
E 50V
R708
33K
HP_DET
C720
LN4500 C719
LN4500 10uF
R713 1000pF
10V
1K
Q701 50V
C
E LN4500
MMBT3904(NXP) OPT
B Q705
MMBT3904(NXP)
B
E
C
LN4500
C721
LN4500
10uF
R711 C717
10V
C
LN4500 E 1000pF
LN4500 1K
Q703 50V
B Q704
MMBT3904(NXP) OPT
MMBT3904(NXP)
B
E
C
LN4500
LN4500
Q706
R739 MMBT3906(NXP)
0
MUTE control
1/16W
5%
12.08.16
Added
R714
by JCPark
3.3K
121106
1K->0ohm
pop up noise improve
NRS6045T100MMGK
NRS6045T100MMGK
NRS6045T100MMGK
OPT
C703
NRS6045T100MMGK
0.01uF
50V
D706
1N4148W R719 R715
L700
100V 12 12
10uH Audio_Coil_ABCO
OPT
C730
LPH6045T-100M
390pF
50V
L706
10uH Audio_Coil_ABCO
C731
390pF
LPH6045T-100M
50V
D707
R704
1N4148W R720
12 12
100V
OPT
C722
22000pF
50V
C727 C743 C726
1uF 1uF 1uF
25V 25V 25V
C723
22000pF
50V
D704 R712
R717
L701
1N4148W 12
12
10uH Audio_Coil_ABCO
100V
OPT
LPH6045T-100M
C728
390pF
50V
L709
C716
10uH Audio_Coil_ABCO
C729
10uF
390pF
50V LPH6045T-100M
25V D705
1N4148W
R718 R702
100V
12 12
OPT
Pop-up noise killer
HP_LOUT
R734
220K
11.10.27
HP_ROUT
2.7K->220K
+3.3V_ST
LN4500
D709
MMBD6100
C
A2
SB_MUTE
R733
B C
A1
10K
HP_MUTE
Q707
E
MMBT3904(NXP)
LN4500
L700-*1
10.0uH
(OPT)Audio_Coil_TAIYO
L706-*1
10.0uH
(OPT)Audio_Coil_TAIYO
L701-*1
10.0uH
(OPT)Audio_Coil_TAIYO
L709-*1
10.0uH
(OPT)Audio_Coil_TAIYO
R727
C739
0.1uF
5.1K
50V
C735
0.47uF
50V
C740
0.1uF R728
50V
5.1K
JP704
JP705
JP706
JP707
C737 R729
0.1uF 5.1K
C734
50V
0.47uF
50V
C738 R730
0.1uF 5.1K
50V
+19V
AC KDS226
D710
A C
R736
470
C724
47uF
E
25V
MMBT3906(NXP)
B Q702
3K:
With SCART MUTE BLOCK
C
OPT
C742
R737
12K:
R735 12K
4.7uF
Without SCART MUTE BLOCK
220K
50V
SB_MUTE
11.10.27
Apply->OPT
R738
12K
P700
SMAW250-H04R
4
SPK_L+
3
SPK_L-
2 SPK_R+
1 SPK_R-
WAFER-ANGLE
EAX65303801
2013.1.14
NC4_S7LRM
AUDIO AMP 7 13
LGE Internal Use Only