Block Diagram - LG FM300 Service Manual

6.Block diagram

MIMO ANT
LTE Band 20
Duplexer
PAM Transformer
LNA
SAW
RRFM1_INN
PAM
RRFM1_INP
Voltage
Detector
AFE_HKADC_IN3
Transformer
TRF1_OUTP
TRF1_OUTN
AFC VOUT AFC_VOUT
REF_CLK_IN
I_REF_CLK
TCXO
TXPLL_PWR_EN LDO
(TX PLL)
RXPLL_PWR_EN LDO
(RX PLL)
RF_HKP_EN
LDO(HKP)
LDO
(BB PLL) (BB PLL)
FM300 Sub Board
LGE Internal Use Only
RF Block
SAW
Current
Diversity
Monitor
Antenna
Serial
Flash
Memory
DP0 / DM0
DP1 / DM1
SIM
L/T
L2000
GPIO7/8/14
USB clk
48MHz
RTC clk
32KHz
DCDC_
LP8725
1.2
(PMIC)
DCDC_
1.8
VDD_3.7
RF Switch
BPF
USB1_SELECT
DPDT1
GPIO15[NP_USB1_SELECT]
USB20PHY
USB A
CON
SIM_PWR
VDD_3.7
LQI LED [R,G,B]
DDR ADDR DDR_ADDR
DDR SDRAM
(256Mb, 133MHz)
DDR_DATA
Serial Flash SFLASH
Memory (128Mb)
DPDT2 DPDT3
UART_SEL
USB Mini B USB Mini B
CON1 CON2
UART Interface
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6. BLOCK DIAGRAM
FM300 Main Board
WiFi Chip ANT
(MIMO Supports)
RF Switch
BPF
Ethernet LED [GREEN]
GPIO1 GPIO1
GPIO8
USB LED [GREEN]
TDP1
TDN1
TRANS
FORMER
RDP1
BCM5358U RDN1
Crystal
20MHz
Reset Switch
EXT_POR_L
PWR LED
GPIO5
POWER LED [WHITE]
NP_EN & LTE_EN
VDD_2.6V_LT
LDO(L/T)
VDD_1.2V VDD_3.3V
DCDC_3.
BUCK
3V
VDD_2.5V
VCNTL
DCDC_3.
VDD_3.7V
7V
Only for training and service purposes
VDD_3.3
RJ-45
CON
Power Button
DC Jack
(12V Adaptor) (12V Adaptor)