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S55A3-D
LG S55A3-D Service Manual
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3-24
3-23
Wireless
TX
PWM
PS9860
PWM RS
T/MUTE
TX_LRCK/BCK/ADATA0
FL
TL
LPF
FL_P/N, FR_P/N
50 W
AMP_PDN(RST
)
AMP_FAUL
T/DC_DET
/CLIP0/PROT
ECT
POWER/
FUNC/VOL
+/
-
(key)
USB D+/D-
RMC
Flash
(4 MB)
SPI
Flash
(1 MB
)
SDRA
M
(8 MB
)
MCS_RS
T
PWM SDA/SCL
WL_RESET
AMP_P_CT
RL
50 W
AMP
TAS5612
AUDIO OUT
AUDIO IN
LED
DC to DC,
LDO
Reset IC
MLC3730
CS8422
DIR_LRCK/BCK/ADATA
DIR_CSD/TEMP/RCBL/INT
DIR_RST
OPT_DET
PORT_DET
OPT_IN
PCM1808
Porta
ble IN
Optical I
N
DIR_SDA/SCL
ADC_ADATA
ADC_BCK/LRCK
LFE_
P/N
MAIN_PWR
_CTRL
DRV_VBUS2.0
DIR_MCLK
PORT_L
/R
WL_INT
CSR8811
BT_CTS/RTS, BT_SCL/SDA,
BT_RST
Wireless
Rx
PWM_T
X_LRCK/BCK/ADAT
A2
WL_SPI/MUTE/CLK/DAT/M
SG_RDY
Option
BLOCK DIAGRAMS
1. SYSTEM BLOCK DIAGRAM
36
38
Table of Contents
Section 1 General
3
Table of Contents
3
Esd Precautions
4
Wireless Subwoofer Connection
5
Hidden Key Mode
6
Mcs / Eq Hidden Key Guide
7
Mcs / Eq Program Update Guide
8
Specifications
9
Section 2 Cabinet & Main Chassis
10
Exploded Views
12
Main Set Section
12
Wireless Subwoofer Section
13
Packing Accessory Section
14
Section 3 Electrical
16
One Point Repair Guide
17
Power Problem (Pvdd)
17
Power on Error
18
Sound (Portable Function)
19
Wireless
20
Bluetooth
21
Sound (Optical)
22
D(DC) Protection
23
S(Shut Down) Protection
24
B(Burnt) Protection
25
Waveforms of Major Check Point
26
Crystal
26
Flash Memory
27
Tact Key
28
Usb
29
Remote Control
30
Optical
31
Portable
32
Audio Pwm
34
Audio Amp
35
Wiring Diagram
36
Block Diagrams
37
System Block Diagram
37
Power Block Diagram
38
Circuit Diagrams
39
Smps Circuit Diagram
39
Main - Dsp Circuit Diagram
40
Main - Interface Circuit Diagram
41
Main - Pwm & Amp Circuit Diagram
42
Main - Power Circuit Diagram
43
Front Circuit Diagram
44
Circuit Voltage Chart
45
Ics
45
Connectors
46
Printed Circuit Board Diagrams
47
Smps P. C. Board Diagram
47
Main P. C. Board Diagram
48
Front P. C. Board Diagram
49
Section 4 Wireless Subwoofer Part
50
One Point Repair Guide
51
Power Problem (Pvdd)
51
Power on Error
52
Wireless Connection
54
Waveforms of Major Check Point
55
Voltage
55
Amp Voltage
56
Pwm
57
Led
58
Wiring Diagram
60
Block Diagram
61
Circuit Diagrams
62
Woofer Smps Circuit Diagram
62
Woofer Amp Circuit Diagram
63
Woofer Key Circuit Diagram
64
Printed Circuit Board Diagrams
65
Woofer Smps P. C. Board
65
Woofer Amp P. C. Board
66
Woofer Key P. C. Board
66
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Owner's Manual
24 pages
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LG S55A3-D Specifications
General
Brand
LG
Model
S55A3-D
Category
Speaker System
Language
English
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