System Block Diagram_2 - LG OM5541 Service Manual

2. SYSTEM BLOCK DIAGRAM_2

Mic L/R
Mic
Tuner
3.3V
TUNER
(AM/FM)
I2C
TUNER L/R
PORT L/R
PORTABLE
AUX L/R
AUX
2.0 D+, D-
USB 1
1.1 D+, D-
USB 2
BT_SCL/SDA/TX/RX/RTS/CTS/RST
BT
VFD PCB
IR
VFD Driver
MC3501
MAIN + AMP PCB
Key_3
Volume cont I/O U-COM
LC87FC096AVU
3.3/5V
24 MHz
ADC
I2C,RESET
(CS5346)
MLC3730
SPI
3.3V
FL+,FL-
Vkk
SDRAM
(8MB)
3.3V
3-29
3.3V
DAC_MCLK / BCK
/ LRCK / DAC_DATA
3.3V/1.2V
AMP_SD/OTW / PROTECT/ CLIP0
32.768 KHz
KEY cont
(176PIN)
LED
DRV_VBUS
EEPROM
Serial Flash
(4MB)
(2KByte)
3.3V 3.3V
3-30
PVDD(48V)/GVDD(12V)
I2C
3.3V 12V
PWM
AMP
TAS5548 TAS5631B
CTL
FRONT1 PCB
3.3V/5V
Key_1
Key_2 FUNCTION KEY * 10 EA
PORTABLE
Main
Mic AMP VR
Mic
Volume * 3 EA
S4308
MIC JACK PCB
M.Vol Jack 1 Jack 2
SPK LED PCB
3.3V/12V
RED LED
FRONT2 PCB
3.3V/5V
Key_3
USB REC KEY * 1 EA
USB 1
Search
USB 2
VR
LPF
IR