LG SJ2 Service Manual

3-19 3-20
BLOCK DIAGRAM
Series Flash
SDRAM 64 MHz
24 MHz
CRYSTAL
Audio DSP
Reset IC
AC-CORD
70 W PSU
DC to DC
IC100
BK5V
DC 22 V
DMP4639
MOSFET SW
To Amp
1.23 V
DC to DC
BK3V3
BK1.23 V
MOSFET
AO3403
DC to DC
IC101
+5 V
LDO 6332
3.3 V
3.3 V
8 Ω 30 W
PWR AMP
IC500
THD 10 %
R
THD 10 %
8 Ω 30 W
L
- +
- +
I2C / RST / PWDN
DATA0(P124) MCLK
LRCK
BCK
Internal Antenna
Wireless
Wireless module
DATA2(P120)
W_SDA
W_SCL
W_INT
W_RST(no use)
IC305
+22 V
DC to DC
W3.3 V
W3.3 V
Main Power Board
fixed AC power cord
IR
IR
GND
8307 Debug
OPTICAL
USB
playback
Protect IC
5V-In
ESD Protect
1 pcs
BT Internal Antenna
IC302
BT Module
SPIDF-IN
MP3-IN
L/R
ADC
DATA
BCK
LRCK
MCLK
MTK I/O PIN control
BTAudio IN
OPTICAL
white LEDRed LED
white LED
white LED
Standby
Dot LED Display
power on/off key IO
BK3V3
LDO
BK5 V
IC301
MP3_IN_DETECT
OPT_Det
USB
white LED
Switch key
USB Overcurrent DET
VOL+/- source
Switch key
Sensor
vol+
vol-
source
IC300
SPDIF_RX
DATA
BCK LRCK
MCLK
UART(Single) control
I2C
24.576 MHz
CRYSTAL
32 M bit
for EQ and SW

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