LG SPQ8-W - CAUTION concerning the Power Cord

4-8
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
4. PWM
FIG 4-1. Woofer PWM
SW + Signal
FIG 4-2. Woofer PWM
SW - Signal
7 8
8
7
SW-
SW+
WR779
33
WR778
33
41
7CW
F
n
00
1
WL713
PZ1608U221-1R4TF
DGND
BCK
ADATA
WC737
100uF
NC_AL_CAP
DGND
DGND
WC708 10uF WC709
100nF
DGND
WC703
100nF
P_CTRL
WC718
100nF
WC712
100nF
TP700
WC711 100nF
WC730 100nF
WC726 10uF
WC713 10uF
WC729 100nF
WIC700
1
VSSA_PLL
2
VSS_PLL
3
VSS_IO
4
XOUT
5
XIN
6
VDD_CORE
7
NRESET
8
SCK_SCL
9
SO_SDA
10
SI_AD0
11
NCS_AD2
12
EXT_MUTE
13
ADC_MCLK
14
ADC_BCK
15
ADC_LRCK
16
ADC_SDIN
17
VDD_IO
18
VSS
19
MBCK
20
MLRCK
21
MSDIN0
22
MSDIN1
23
MSDIN2
24
MSDIN3
25
VDD_CORE
26
SBCK
27
SLRCK
28
SSDIN0
29
SSDIN1
30
SSDIN2
31
SSDIN3
32
VSS
33
TOCAP_REG1
34
VIN33_REG1
35
VOUT12_REG1
36
VSS
37
PWM_CH1_M
38
PWM_CH1_P
39
PWM_CH2_M
40
PWM_CH2_P
41
PWM_CH3_M
42
PWM_CH3_P
43
VDD_IO
44
VSS_IO
45
PWM_CH4_M
46
PWM_CH4_P
47
PWM_CH5_M
48
PWM_CH5_P
49
PWM_CH6_M
50
PWM_CH6_P
51
VSS
52
VDD_IO
53
PWM_CH7_M
54
PWM_CH7_P
55
PWM_CH8_M
56
PWM_CH8_P
57
PWM_HP_RIGHT_M
58
PWM_HP_RIGHT_P
59
PWM_HP_LEFT_M
60
PWM_HP_LEFT_P
61
PMODE
62
SPI_I2C
63
VDD_CORE
64
VSS
65
TOCAP_REG2
66
VIN33_REG2
67
VOUT12_REG2
68
VDD_PLL
WR788 33
WC707
100nF
WC704 100nF
WC717
10uF
WC716
100nF
TP702
WC710 10uF
7
27
CWFn00
1
WL712
PZ1608U221-1R4TF
LRCK
+3.3V_PWM
WL714
PZ1608U221-1R4TF
51
7
CW
Fn
0
01
PWM
SWF +/-
EXT_MUTE : ACTIVE HIGH -> MUTE
I2S FROM MODULE