LG SJ2 Service Manual

4-5
ELECTRICAL TROUBLESHOOTING GUIDE
3. POWER AMP PART
YES
YES
YES
YES
YES
YES
Power AMP part
Check U201 signal out network, the device
a short circuit will cause no output.
Refer to No 24.7 V.
Check Q203, Q303.
Replace the related part.
Check Q300 pin5, 6, 7, 8
24.7 V output.
Check I2S signal input U201 pin9, 10, 11.
NO
NO
NO
The sub power of 24 V.
Check U201 pin8, 31
3.3 V input.
Check resistance R228, R229, R233.

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