LG 55LE5400 (CHASSIS:LA02D) Service Manual ▷ View online
LG Electronics/ LCD TV Division
LCD TV AT1 Gr.
GP2-BCM (ATSC) trouble shooting guide
Applied chassis: LA02D
Applied models : 32/42/47/55LE5400-UC
Applied models : 32/42/47/55LE5400-UC
D-sub RGB
HDMI 1
Side AV Gender
CVBS, L/R
DDR2 (128Mbit)
NAND Flash
(4GB)
Digital Audio (Optic)
USB1
Digital AMP
NTP7000
RS-232C (Ctrl./SVC)
I2S
NVRAM
RGB/H/V
DDR_Data[0:15], DQS, DM …
Data[16:31]
Addr.[ ], ctrl. data
MICOM
(NEC)
MAX3232
Data [0 … 7]
X-tal
AV
Component 1
Y Pb Pr, L/R
CVBS, L/R
HDMI4
Addr[0…1], CS …
Component 2
Y Pb Pr, L/R
Audio L/R
Audio L/R (for RGB)
HDMI 2
HDMI 3
SPDIF
DP/DM/ +5V
RX/TX
54MHz
(3
rd
overtone)
JACK PACK
JACK PACK
at REAR
at REAR
JACK PACK
JACK PACK
at SIDE
at SIDE
SCL, SDA_3.3V
SCL, SDA_3.3V
LCD Module
USB2
Wireless Ready
Power
IF +/-
SIF
TU_CVBS
Reset / IF_AGC
…
…
SDA/SCL_5V
RF
TDVJ
-
H031F
DP/DM/ +5V
MCLK
Y Pb Pr, L/R
Side Component Gender
Ethernet
LG5111
(Local
dimming)
LGE7378P
(FRC, T-CON)
DDR2 (128Mbit)
DDR2 (128Mbit)
DDR2 (128Mbit)
HP_L/R
DDR3 (1Gbit)
Hynix
LVDS_60Hz
LVDS_120Hz
MINI_LVDS_120Hz
LGE3549
(ATSC)
LGE3549
(ATSC)
1. Overview for LGE3549 (ATSC) - US
TDA19997
4x1
HDMI Switch
HP AMP
TPA6132
* Each of analog audio signals shall be designed with “Common Mode (INCM) signal ”
2. Video Signal block
D-sub RGB
HDMI 1
SIDE_CVBS Phone JACK
CVBS(SIDE_AV_CVBS)
B(DSUB_B)
REAR AV
Component 1
CVBS(REAR_AV_CVBS)
Component 2
Y(COMP2_Y)
H_sync(RGB_HSYNC)
Pb(COMP2_Pb)
Pr(COMP2_Pr)
Y(COMP1_Y)
Pb(COMP1_Pb)
Pr(COMP1_Pr)
G(DSUB_G)
R(DSUB_R)
HDMI_RX0+/-, RX1+/-, RX2 +/-, CLK +/-
HDMI_SDA
HDMI_SCL
LGE3549
SD_CVBS2
SD_CVBS3
SD_Y1
SD_PB1
SD_PR1
SD_Y2
SD_PB2
SD_PR2
SD_B
SD_R
SD_G
RGB_HSYNC
RGB_VSYNC
HDMI_RX_0_CLK_P
HDMI_RX_0_CLK_N
HDMI_RX_0_DATA0_P
HDMI_RX_0_DATA0_N
HDMI_RX_0_DATA1_P
HDMI_RX_0_DATA1_N
HDMI_RX_0_DATA2_P
HDMI_RX_0_DATA2_N
HDMI_RX_0_CLK_N
HDMI_RX_0_DATA0_P
HDMI_RX_0_DATA0_N
HDMI_RX_0_DATA1_P
HDMI_RX_0_DATA1_N
HDMI_RX_0_DATA2_P
HDMI_RX_0_DATA2_N
HDMI_RX_0_DDC_SCL
HDMI_RX_0_DDC_SDA
HDMI_RX_0_RESREF
HDMI_RX_1_RESREF
499Ω_1%
499Ω_1%
A2.5VI
TMDS
DDC
HPD_1
HDMI 2
HDMI 3
HDMI 4
HDMI
4x1
Switch
(TDA19997)
IF + [MAIN]
CVBS [MAIN]
IF - [MAIN]
EDSAFE_IF_P
EDSAFE_IF_N
EDSAFE_IF_N
SD_CVBS1
V_sync(RGB_VSYNC)
TMDS
DDC
HPD_2
TMDS
DDC
HPD_3
TMDS
DDC
HPD_4
GPIO-18
GPIO_17
GPIO_19
GPIO_53
RF
SIDE_Component Phone Jack
Y(SIDE_COMP-Y)
Pb(SIDE_COMP-Pb)
Pr(SIDE_COMP-Pr)
SD_Y3
SD_PB3
SD_PR3
TDVJ-H031F
Main tuner
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