LG SJ2 Service Manual

SECTION 4
WIRELESS SUBWOOFER PART
CONTENTS
ELECTRICAL TROUBLESHOOTING GUIDE ................................................................................................... 4-2
1. SMPS POWER CIRCUIT ........................................................................................................................ 4-2
2. LED PART ............................................................................................................................................... 4-4
3. POWER AMP PART ............................................................................................................................... 4-5
WAVEFORMS OF MAJOR CHECK POINT ...................................................................................................... 4-6
1. AMP IC .................................................................................................................................................... 4-6
WIRING DIAGRAM ............................................................................................................................................ 4-7
BLOCK DIAGRAM ............................................................................................................................................ 4-9
CIRCUIT VOLTAGE CHART ........................................................................................................................... 4-11
PRINTED CIRCUIT BOARD DIAGRAM ......................................................................................................... 4-13
1. SMPS & AMP P. C. BOARD DIAGRAM ............................................................................................... 4-13
4-1

LG SJ2 Specifications

General

Style	Wireless Soundbar
Color	Black
Channels	2.1
Total Power	160 W
Speaker Units	-
Internal Memory	-
Radio Tuner	-
Wireless Connectivity	Bluetooth
Interface Connectors	Optical Input 1 ea
Sound Modes	Sports
Max Sound Pressure Level (SPL)	-
Signal to Noise Ratio	-
Frequency Response	-
Features	Crystal Amplifier Pro
Audio Processing	-
Water / Dust resistance	-
Power Supply	~ 50/60Hz
Power Consumption	-
Battery Life	-
Battery Capacity	-

Weight and Dimensions

Depth	3.9 in
Height	2.2 in
Width	25.9 in
Net Weight	3.75 lbs