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LG SPK5B-W Service Manual
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3-3
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
ADC
PCM1808
(Slave)
D+/D-
M_BCK/
LRCK/
DATA0,1,2
MTK
_R
S
T/
MICO
M_T
X
/R
X/
PW
R_STA
TUS
/INST_BOOT
PWR-SENS
P_SENSE
PTB_DET
OPT_SPDI
F
S-Flash
(1 MB
)
SF_CS/C
LK/DI
/DO
OPT_DET
TMDS/HPD/EDID_I
2C/ARC/CEC
TMDS1/RX_HPD1/EDID_I2C/PW
R5V_1
AMP_SD_
OTW
/DC_DETECT/AM
P_PROTECT
AMP_PDN(
RST)
PW
M RST
PW
M SDA/SCL
P_CTRL/D33_CTRL/
DCDC_12_15_CTRL
WI
F
I
_
CT
R
L
HPD_DET/
HDMI
_I2C
24.576M
FR_P/N,
TW
R_P/
N
AUDIO AN
ALOG
AUDIO PWM
AUDIO SPD
IF
DC_DC, LDO
,Switch
-IC
FL_P/N,
TW
L_P/N
DDR3
128 MB x 2
A RA [0~14]
SPI0
27 M
NA
ND
512 MB
M_MC
LK
/L
RC
K/
BCK/ADC_DAT
W
L
_MUT
E/
INIT
/R
ST
/MSG_RDY/CLK/DAT
PW
M_BCK/L
RCK/DATA2
Wir
ele
ss
Woofer
Wir
ele
ss
Module
RX
FRONT
LCD
5-digit
LCD_DO/CLK/
STB/BL_CTRL
RMC
RMC
KEY
S-Flash
1 MB
POW
ER/FUNC
/VOL+/-
SPI
BT_TX/
RX
MT8506
1.2/1.5/3.3V
DD/DTS
Decoding
FL
TW
L
LPF
40W
40W
LPF
AM
P
I
C
FR
TW
R
40W
LPF
40W
LPF
AM
P
I
C
MICOM
64pin
BT_RST
2
PWM
Wir
ele
ss
Modu
le
TX (5
G)
HDMI OUT
HDMI IN
EPHY_TDP/N, EPHY
_RDP/N
ETHERNET
OPTICAL
PORTABLE
USB(SVC)
WI
F
I
_
DP
/
DN
BT_SCL/SDA
Wi
-
Fi
Module
D DQ [0~31]
BT_RX
BLOCK DIAGRAM
31
33
Table of Contents
Section 1 Summary
3
Table of Contents
3
Product Safety Servicing Guidelines for Audio Products
4
Servicing Precautions
5
General Servicing Precautions
5
Insulation Checking Prodedure
5
Electrostatically Sensitive (Es) Devices
5
Name of each Component
6
Wireless Subwoofer Connection
7
Rear Speakers Connection (Sold Separately)
8
Hidden Key Mode
9
Software Update Guide
10
Specifications
13
Section 2 Cabinet & Main Chassis
14
Disassembly Instructions
15
How to Disassemble the Main Unit
16
How to Disassemble the Subwoofer
23
Exploded Views
26
Main Unit Section
26
Wireless Subwoofer Section
27
Packing Accessory Section
28
Section 3 Electrical
30
Wiring Diagram
31
Block Diagram
32
One Point Repair Guide
34
Booting When You Turn the Unit On, no Message or "Hello" on Front Panel
34
Sound
37
Protection Error
41
Waveforms of Major Check Point
44
Crystal
44
Flash Memory
44
Tact Key
45
Remote Control
47
Optical
48
Circuit Voltage Chart
49
Printed Circuit Board Diagrams
51
Main P. C. Board Diagram
51
Front P. C. Board Diagram
52
Key P. C. Board Diagram
52
Section 4 Wireless Subwoofer Part
53
Wiring Diagram
54
Block Diagram
55
One Point Repair Guide
56
Power on Error
56
Wireless Connection
58
Waveforms of Major Check Point
59
Crystal
59
Flash Memory
59
Voltage
60
Amp Voltage
61
Pwm
62
Led
63
Circuit Voltage Chart
65
Printed Circuit Board Diagrams
66
Woofer Smps & Amp P. C. Board
66
Section 5 Wireless Receiver Part (Option)
67
Wiring Diagram
68
Block Diagram
69
One Point Repair Guide
70
Electrical Troubleshooting Guide
72
Waveforms
73
Printed Circuit Board Diagrams
75
Wireless Receiver Smps P. C. Board
75
Wireless Receiver Amp P. C. Board
76
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Owner's Manual
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LG SPK5B-W Specifications
General
Brand
LG
Model
SPK5B-W
Category
Speaker System
Language
English
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