LG 31MU97 Service Manual page 23

+3.3V_SCALER
+3.3V_SCALER
IC100
NT68370(E Ver.)
C800
C802
10uF 0.1uF
10V C22
AUDIO_VDD
B22
I2S3/AIN2R
A22
I2S2/AIN2L
B23
I2S1/AIN1R
A23
R824
I2S0/AIN1L
33
C24
AUD_LRCK
WD
A24
HP_ROUT_MAIN SCK/AOUT_R
B24
HP_LOUT_MAIN MCLK/AOUT_L
B25
SPDIF
B21
AUDIO_GND
A21
AUDIO_CEXT2
C803
4.7uF
10V
+3.3V_SCALER_2
IC200
NT68370(E Ver.)
C22
AUDIO_VDD
C820
B22
0.1uF
I2S3/AIN2R
A22
I2S2/AIN2L
B23
I2S1/AIN1R
A23
I2S0/AIN1L
C24
WD
A24
SCK/AOUT_R
B24
MCLK/AOUT_L
B25
SPDIF
B21
AUDIO_GND
A21
AUDIO_CEXT2
+3.3V_AMP
R800
100K
R801
1K
JP800
OPT
D800
20V C809
1uF
6 M6
10V
JP801
1 M1
C810
JP802
220uF
3 M3_DETECT 16V
4 M4
5 M5_GND JP803 OPT
D801
KJA-PH-1-0177-2 R803 20V
1K
JK800
C811
220uF
16V
OPT
D802
R805 20V
1K
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright © 2014 LG Electronics Inc. All rights reserved.
Only for training and service purposes
TP800
AUD_MCLK
AUD_DATA
AMP_RESET
HP_DET
R810
10
HP_ROUT_HP
R804
100
C818
2200pF
50V
R806
10
HP_LOUT_HP
R811
100
C822
2200pF
50V
MULTI_ON
+19V_AMP
C814
10uF
25V
+3.3V_AMP
C812
0.022uF C816
0.1uF
16V
50V
C804 C807
0.1uF 0.1uF
16V 16V
GPO17/EVNT OUT1B_1
1 36
VSSPLL VSSP1_1
2 35
THERMAL
VPLL18 BST1B
3 34
49
C837
XTALI/CLKIN NU_4
4 33 0.1uF
IC800
16V OPT
XTALO NU_3
5 32
GPIO03/SDI1 DNW116F VDR1
6 31
GPIO02/SDI0 VDR2
7 30
VDD_1 NU_2
OPT
8 29
VD18 NU_1
9 28 C838
0.1uF
NRESET BST2A
10 27 16V
C801 C806 GPIO04/SDI2 VSSP2_2
11 26
4.7uF 4.7uF
GPIO05/SDI3 OUT2A_2
12 25
10V 10V
R823
4.7K
R802
1K
+3.3V_AMP
C805
+19V_AMP
0.1uF C815
10uF
16V
25V
C808
+3.3V_AMP
0.1uF
16V
C813
C817
0.022uF 0.1uF
50V
16V
R821 R822
4.7K 4.7K
JP804
AMP_SDA
AMP_SCL
JP805
Pop Noise Killer
+5V
+3.3V_AMP
R817
10K R819
IC801
10K
AZ7029RTRE1
OPT
[Divide voltage] R820
Votlage
3.4375V VCC OUT 0
1 3
Detector
AMP_nMUTE
2
GND
C819 C821
R818
0.01uF 0.1uF
22K
25V 16V
+19V +19V_AMP
R826 C840 C839
1uF 1uF
22K
25V 25V
R827
2.7K
C
R825
B Q801
MMBT3904(NXP)
4.7K
E
OPT
R828 4.7K
L800
10.0uH
L804
R807 CB3216PA501E
3.3
L805
C833 R813
0.22uF 4.7K CB3216PA501E
C825
50V
390pF
50V L806
OPT
CB3216PA501E
C831
0.47uF
L807
50V
CB3216PA501E
C826
390pF
C834 R814
50V
0.22uF 4.7K
50V
R808
3.3
L801
10.0uH
C823
0.022uF C830
16V 1uF
10V
C829
C824 1uF
0.022uF 10V
16V
L802
10.0uH
R809
3.3
C835 R815
0.22uF 4.7K
C827
50V
390pF
50V
OPT
C832
0.47uF
50V
C828
390pF
C836 R816
50V
0.22uF 4.7K
50V
R812
3.3
L803
10.0uH
EARPHONE AMP
+INR
C842
C841
180pF
1uF R829 R832
-INR
10V 10K 43K
HP_ROUT_MAIN
1% C844
R831
2014.6.6 10pF
1% 10K OUTR
50V
To adjust H/P gain
HP_ROUT_HP
+3.3V_AMP GND_1
MUTE
4.7K
R830
R833
0
HP_MUTE VSS
C843 CN
1uF
10V
P800
250A1-WR-H04M
4 SPK_L+
JP806
3
SPK_L-
JP807
2
SPK_R+
JP808
1 SPK_R-
JP809
WAFER-ANGLE
IC802
TPA6138A2
+INL
1 14 C848
180pF C850
R834 R836 1uF
-INL
43K 10K 10V
2 13
HP_LOUT_MAIN
1%
C846 R835
2014.6.6
10pF
OUTL 10K 1%
To adjust H/P gain
3 12 50V
HP_LOUT_HP
UVP
+3.3V_AMP
4 11
GND_2
5 10
L808
120-ohm
BLM18PG121SN1D
VDD
6 9
C847 C849
CP
0.1uF
7 8 1uF
16V
10V
C845
1uF
10V
UHD MODEL 2014.2.14
AUDIO 8 18
LGE Internal Use Only