LG 22LS3700 Service Manual page 28

Audio amp(NTP-7500)
+24V_AMP
+24V
L501
CIS21J121
OPT
C501 C502 C508
C506
0.1uF 0.1uF
4.7uF 0.1uF
50V 50V
16V
16V
C504
1000pF
50V
C503
R505
100pF
50V 3.3K
AUD_LRCH
AUD_LRCK
AUD_SCK
R503 100
AMP_SDA
R504 100
AMP_SCL
C507 C509
+3.5V_ST
33pF 33pF
50V 50V
NON_LIPS
R502
R520 10K
R506
10K
NON_LIPS
NON_LIPS C 100
C505
R501 1000pF
B
Q501
AMP_MUTE
MMBT3904(NXP)
10K
NON_LIPS
NON_LIPS E
R522
0
POWER_DET
LIPS_ONLY
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 © 2012 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
+3.3V_Normal AMP_RESET
R521 C516
10K 1000pF
50V
L502
BLM18PG121SN1D
AUD_MASTER_CLK
C515
C514
10uF
0.1uF
10V
16V
OPT
C510 C512
10uF 0.1uF
10V
16V
AGND_PLL
1
AVDD_PLL
2
THERMAL
DVDD_PLL
3 49
LF
4
IC501
DGND_PLL
5
OPT
GND_1 NTP-7500L
C511 6
10uF C513
10V 0.1uF
DGND
16V
7
DVDD
8
SDATA
9
WCK
10
BCK
11
SDA
12
50V
C518
22000pF
50V
+24V_AMP
OPT
R507
3.3
OPT
C525
C519 C521 C523
0.01uF
0.1uF 0.1uF 10uF
50V
50V 50V 35V
D501
1N4148W R508 R515
12 12
100V
OPT
C530
390pF
50V
C531
OUT1B_2
390pF
36 D502 50V
1N4148W
R509 R513
OUT1B_1
100V
12 12
35 OPT
PGND1B
34 C526
22000pF
BST1B
50V
33
VDR1
32
VCC_5
31
AGND
30
VDR2
29
C528 C529 C534
BST2A
1uF 1uF 1uF
28
25V 25V 25V
PGND2A
27 C527
22000pF
50V
OUT2A_2
26
OUT2A_1
25
+24V_AMP
D503 R514
R510
1N4148W 12
12
100V
OPT
C532
390pF
50V
C520 C522 C524
C533
0.1uF 0.1uF 10uF
390pF
50V 50V 50V
35V D504
1N4148W
R511 R512
100V
12 12
OPT
SPK_L+
L505
R516
10.0uH C537
0.1uF
4.7K
50V
L506
C535
10.0uH 0.47uF
50V SPEAKER_L
C538
0.1uF R517
50V
4.7K
SPK_L-
SPK_L+
SPK_L-
SPK_R+
SPK_R-
SPK_R+
L503
10.0uH C539 R518
0.1uF 4.7K
C536
L504 50V
0.47uF
10.0uH 50V SPEAKER_R
C540 R519
0.1uF 4.7K
50V
SPK_R-
GP4L_S7LR2
NTP-7500
WAFER-ANGLE
4
3
2
1
P501
2011.10.04
16
LGE Internal Use Only