LG LA74-Z Series User manual

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2013 LED/LCD TV
Engineering guide
< Applicable Model : Mid-end Platform >
XXLA74*-Z*
XXLA71*-Z*
XXLA69/66*-Z*
XXLA64/62/61*-Z*
XXLN57*-Z*
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

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◈CONTENT ◈
1. New features
2. Main PCBs
3. Block Diagrams, IIC Map
4. Structure of TV set and connection of sub ass’ys
5. New sub ass’ys
- Instruction of new sub ass’ys
6. Adjust way of new features
7. Repair guide
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

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EPI Interface
EPI(Embedded Point-Point Interface)
Features
•Point-Point topology (support 2 Pair option)
•CDR (Clock Data Recovery)
•Bandwidth up to 1.85Gbps/pair
at FHD 120Hz 10 bit application
•Lock signal cascading and feedback to T-Con
•Embedded Control Data
Merits
•Better reliability on common noise
•No data skew and better EMI margin
•Fewer lines than mini-LVDS
•Slim PCB design
TCON
2
LOCK
VCC 1
Figure1. Topology
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

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EPI Interface (mini-LVDS vs. EPI)
Comparison
HF mini-LVDS
What to change
EPI (Embedded clock P-to-P Interface)
-Difficult to upgrade bandwidth limit
-Multiple number of wires needed for higher bandwidth
HF mini-
LVDS
FHD (10bit)
60Hz 120Hz 240Hz
No. of Signal 36 36 72
Connector 60pin
(2ea)
60pin
(2ea)
80pin
(2ea)
-Better reliability on common noise
-No data skew. Better EMI margin
-Lower cost ( Cable, Connector )
-Slim S-PCB design (14mm Æ10mm) helps slimmer TV
EPI
FHD (10bit)
60Hz 120Hz 240Hz
960ch 960ch 720ch
No. of Signal 12 12 32
Connector - 50 pin
(2ea)
70pin
(2ea)
LCM (T-con to S-Driver IC)
TCON
2
LOCK
VCC 1
TCON
18
VCC 1
18
HF mini-LVDS
EPI
* Bandwidth Capability
- FHD 120Hz 10Bit : 594Mbps@36Lines →1.65Gbps@12Lines
- FHD 240Hz 10Bit : 594Mbps@72Lines →1.25Gbps@32Lines
(FHD 120Hz)
(FHD 120Hz)
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

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HF mini-LVDS EPI
Topology
Protocol
Features
@10bit, FHD120
•Multi Drop
•Data rate: 660Mbps
•External clock
•Point to Point
•Data rate : 1.8Gbps
•Embedded clock, Control
Merit •Simple structure
•Standardization
•Fewer Lines : 12
•Embedded clock
: low EMI, Clock skew free
•Easy to PCB design
Demerit
•Too many lines : 36
•Clock skew
•EMI due to clock lines
•Bandwidth limit
•Transmission Overhead
: 4bit delimiter
TCON
Lock
2
1
TCON
EPI Interface (mini-LVDS vs. EPI)
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

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NFC (Near field communication)
Near field communication (NFC) is a set of standards for smartphones and similar devices to establish radio communication
with each other by touching them together or bringing them into close proximity, usually no more than a few centimetres.
Present and anticipated applications include contactless transactions, data exchange, and simplified setup of more complex
communications such as Wi-Fi. Communication is also possible between an NFC device and an unpowered NFC chip, called
a "tag".
User Action Area
Samrt phone close to
NFC Tag Player choose
From Smart phone
to TV
From TV
to Smart phone
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

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Main PCB for Broadband Main + TCON all in one
To PSU
1
2
6
4
1Main processor, DDR Memory
eMMC Memory
2
3
4
Micom for Key/IR sensing
PMIC
Audio AMP
xxLA660S-Zx
Key+IR
Front Spk
To module
5
5EPI Wafer
S
model
21
LNB IC Block
Only S model
1
2
Chassis : LD33B
PCB P/No : EAX64797003
3
6Level shifter
WIFI/BT
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

1. LGE2122 Block Diagram
Audio AMP
(NTP7513)
LGE 2122
CI Slot
P_TS
P_TS
T/C Demod
IF (+/-)
USB1
OPTIC
LAN
DDR3 1600 X 16
(512MB X 2EA)
HDMI1
HDMI2
HDMI3
Analog Demod SYSTEM EEPROM
(256Kb)
HDMI
MUX
Air/
Cable TUNER
(T/C/A)
TUNER
(S2)
DVB-S DEMOD
(S2)
LNB
USB2
USB3
41P
51P
eMMC
(4GB)
Sub Micom
(RENESAS R5F1000G)
DDR3 1600 X 16
(256MB X 1EA)
P_TS
50P
50P
X_TAL
27MHz
T/C/S2 Without ATV
A B
HDCP EEPROM
(16Kb)
X_TAL
32.768KHz
I2S Out
I2C 1
EPI
I2C 2
LVDS
USB
P_TS I2C 5
I2C 1
H/P
AV/COMP
SCART
Tuner : I2C 6
DVB-S : I2C 4
OCP
2.5A
OCP
1A
(HDD)
MHL 1A
SIL1392
MHL : I2C 4
MHL
R
E
A
R
S
I
D
E
S
I
D
E
R
E
A
R
(H)
AMP
TI
CVBS/YPbPr
CVBS/RGB
SPDIF OUT
ETHERNET
I2C 3
LOCAL DIMMING
BLUTOOTH
IR / NFC
PM
IC
LEVEL
SHIFTER
WIFI
KEY
LOGO LIGHT
SUB
ASSY
I2C 1
UART
IR
KEY
USB_WIFI
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

33Ω
+3.3V_Normal
2.7KΩ
+3.5V_ST
3.3KΩ
IC3000
Renesas MICOM
TUNER(S)
2.7KΩ
+3.3V_Normal
I2C_SDA4
I2C_SCL4
I2C_SDA3
I2C_SCL3 LNB
33Ω
22Ω
33Ω
+3.3V_Normal
2.7KΩ
IC7700
PMIC
I2C_SDA2
I2C_SCL2
33Ω
+3.3V_Normal
1.2KΩ
IC8101
NTP7513(AMP)
I2C_SDA1
I2C_SCL1
100Ω
P7600
Local dimming 33Ω
IC101
HDCP EEPROM 22Ω
33Ω
IC100
NVRAM
2.7KΩ
+3.3V_Normal
I2C_SDA5
I2C_SCL5
33Ω
33Ω
I2C_SDA6
I2C_SCL6 TUNER(D)
2.7KΩ
+3.3V_Normal
33Ω
33Ω
IC3304
MHL
IC105
LGE 2122
2. LGE 2122 I2C Block Diagram
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

3. Power Block Diagram
3.5V
24V
+12V_LNB
LNB option
PANEL_VCC
PANEL_POWER
NTP_7400(PVDD1)
NTP_7400(PVDD2)
AMP
5V Normal
3A 3.3V DAC
MTK(AVDD33_DAC)
HDMI_EEPROM
RGB_EEPROM
CI (+5V_CI_ON)
TUNER(+5V_TU)
1.2V Core
6A
MTK(AVDD12_LVDS)
MTK
(
AVDD_
)
MTK(VCCK)
MICOM(VDD)
IR A'ssy
1.5V DDR
3A
MTK (DDRV)
DDR(VDD)
DDR(VDDQ)
TUNER(+1.23V)
12V
5V USB
1CH DCDC 4A
2CH OCP 1.2A
USB2(Max 1.2A)
USB3(Max 1.2A)
USB_WIFI
3.3V Noraml
4A
SPDIF
IR A'ss
y
M_REMOTE
HDCP EEPROM
NVRAM
MTK
(
DVDD3V3
)
MTK
(
AVDD33_AADC
)
MTK
(
AVDD3V3
)
MTK
(
AVDD3V3_MEMPL
L
MTK
(
AVDD3V3_LVDS
)
MTK
(
AVDD33_STB
)
A
UDIO AMP
EARPHONE AMP
EMMC
(
VCC
)
EMMC
(
VCC
Q)
T
UNER(+3.3V_TU)
1.8V_TU
5V USB 3A
USB1
(
DVR Max 1.5A
)
1.23V
2A
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

4. Tuner/CI Block Diagram
LGE 2122
TDSQ-
G501D
[RESET] 2 AG24 [ADIN6_SRV]
AF19[OPCTRL1]
AJ19 [OPCTRL0]
[SLC] 3
[SDA] 4
[+3.3V_TUNER] 5
[+.1.8V_TUNER] 7
[T/C_DIF[P]] 10
[T/C_DIF[N]] 11
[ERROR] 16
[SYNC] 17
[VALID] 18
[MCLK] 19
R29 [DEMOD_TSSYNC]
P27 [DEMOD_TSVAL]
P30 [DEMOD_TSCLK]
[D0-7] 20-27
[+1.23V_S2_DEMOD] 30
[S2_RESET] 31 AM18 [ADIN7_SRV]
[+3.3V_S2_DEMOD] 32
LNB
IC6900
A8303SESTR-TB
10 [TONECTRL]
2 [LNB]
7 [SCL]
8 [SDA]
[S2_F22_OUTPUT] 33
[LNB] 36
[S2_SCL] 34
[S2_SDA] 35
AP6 [SCL3]
AR6 [SDA3]
AM27 [ADCINP_DEMOD]
AN27 [ADCINN_DEMOD]
/TU_RESET1
IC2_SCL6
IC2_SDA6
FE_DEMOD1_TS_SYNC
FE_DEMOD1_TS_VAL
FE_DEMOD1_TS_CLK
FE_DEMOD1_TS_DATA [0-7]
+1.23V_D_Demod
/S2_RESET
LNB_TX
I2C_SCL4
I2C_SDA4
22 Ω
LNB_OUT
+3.3V_NORMAL
3.3K Ω
+1.8_TU
+3.3V_TU
+3.3V_D_Demod
IF_P
IF_N
TUNER_SIF(for T2/C/S)
TU_CVBS(for
T2/C/S) IF_AGC
ADCINP_DEMOD
ADCINN_DEMOD
33 Ω33Ω
Attenuator
47 Ω
MT5398_TS_OUT[0-7] CI_MDI[0-7]
CI Slot
47 Ω
MT5398_TS_IN[0-7] CI_TS_DATA[0-7]
/PCM_WE
/PCM_OE
/PCM_IRQA
/PCM_A_REG
PCM_INPACK
/PCM_WAIT
PCM_RST
CI_DATA[0-7] CI_A_DATA[0-7]
CI_ADDR[0-14] CI_A_ADDR[0-14]
/PCM_IORD
/PCM_IOWR
/PCM_CE2
/PCM_CE1
CI_VS1
/CI_CD1
/CI_CD2
CI 5V
Power detect
PCM_5V_CTL +5V_CI_ON
CI_TS_SYNC
CI_TS_VAL
CI_TS_CLK
MTK5398_TS_SYNC
MTK5398_TS_VAL
MTK5398_TS_CLK
[DEMOD_TSDATA0-7]
[GPIO18-25] TS_IN[0-7]
[GPIO34-41] TS_OUT[0-7]
CI_DET1
L33[SPI_CLK]
CI_DET2
L30[SPI_CLK1]
VS1M27[PVR_TS_VAL]
M31[CI_TSCLK] CARD_EN1
CARD_EN2
10K Ω
N34[SPI_DATA]
N35[SPI_CLE]
IOWD
IORD
[GPIO0-14]
[GPIO26-33]
ADDR[0-14]
DAT[0-7]
T34[DEMOD_RST]
P34[PVR_TSDATA1]
N36[CI_INT]
P33[PVR_TSDATA0]
R36[CI_TSVAL]
R37[CI_TSSYNC]
R33[PVR_TSSYNC]
R3[PVR_TSCLK]
R35[CI_TSDATA0]
TS_OUT_CLK
TS_OUT_VAL
TS_OUT_SYNC
CI_RESET
CI_WAIT
INPACK
REG
/IRQA
O_EN
WR_EN
VCC
F28[TCON12]
+5V_CI_ON +3.3V_NORMAL
47K Ω
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

5. Video/Audio In Block Diagram
LGE 2122
[CVBS2P]
Tuner
Jack Side SoC Side
JK501
SCART
JK4600
COMP1_Y/AV1_CVBS
COMP1_Pb
COMP1_Pr
COMP1/AV1/DVI_L_IN
COMP1/AV1/DVI_R_IN
COMP1_Y/AV1_CVBS_SOC
COMP1_Pb_SOC
[PB0P]
[PR0P]
[AIN4_L_AADC]
COMP1_Pb_SOC
COMP1/AV1/DVI_L_IN_SOC
[AIN4_R_AADC]
COMP1/AV1/DVI_R_IN_SOC
SC_CVBS_IN
SC_ID/FB
SC_R/G/B
SC_L/R_IN
TU_CVBS
TUNER_SIF, IF_P/N
[CVBS3P]
SC_CVBS_IN_SOC
SC_FB_SOC
[ADIN0_SRV, SOY1]
[PR1P, PB1P, Y1P]
[AIN1_L/R_AADC]
SC_R/G/B_SOC
SC_L/R_IN_SOC
[CVBS1P]
[MPXP, ADCINP_DEMOD, ADCINN_DEMOD]
TU_CVBS
TUNER_SIF, IF_P/N
Parallel TS / ERROR,VAL,SYNC,CLK Parallel TS / ERROR,VAL,SYNC,CLK
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

6. Audio Out Block Diagram
SPDIF_OUT
IC8101
Audio AMP
NTP7513
LPF
COMP1/AV1/DVI_L_IN_SOC
COMP1/AV1/DVI_R_IN_SOC
[ASPDIF0]
Tuner
TR BUF [MPXP]
SCART
DTV/MNT_L/R_OUT
[AL1_ADAC]
[AR1_ADAC]
SC_L_IN / SC_R_IN
SCART_L/Rout
AUD_LRCH
HP_L/ROUT_MAIN HEAD PHONE
LPF
4P WAFER
[AL0_ADAC]
[AR0_ADAC]
LGE 2122
TUNER_SIF
[AOLRCK]
[AOSDATA0] AUD_LRCK
AUD_SCK
[AOBCK]
[STB_SDA]
[STB_SCL]
I2C_SDA1
I2C_SCL1
IC3000
MICOM
AMP_MUTE
[AIN1_L_AADC]
[AIN1_R_AADC]
[AIN4_L_AADC]
[AIN4_R_AADC]
JK501
DVB only
DVB only
AUD_MASTER_CLK
[AOMCLK]
JK4600
[OPCTRL4] AMP_RESET_N
IC6100
TPA6138A2PWR
HP AMP
JK3602
JK3700
LPF
SPEAKER_L
SPEAKER_R
IC6000
AZ4580MTR
OP AMP
Mute CTRL
(TR)
SCART_MUTE
SCART
JK4600
WOOFER
SIDE_HP_MUTE
LPF
HP_L/ROUT_AMP
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

7. HDMI
HDMI1
HDMI2
HDMI3
CEC_REMOTE
RENESAS
MICOM
HDMI_CEC
LGE 2122
Q3001
DDC_SCL_1_SOC
DDC_SCL_2_JACK
DDC_SDA_2_JACK
DDC_SCL_3_JACK
DDC_SDA_3_JACK
TMDS Link 8bits
HDMI_ARC
DDC_SDA_1_SOC
X-tal
32.768kHz
TMDS Link 8bits
TMDS Link 8bits
WOL_CTL
SIL1292
I2C_SCL4
I2C_SDA4
5V_BUS
OCP
5V_MHL
MHL_DET
TMDS Link or MHL Link
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

EPI Tx
Block
LGE 2122
8. Panel Interface Block Diagram
Z_Out
50Pin X 2
PANEL_VCC
(+12V)
PMIC
TPS65178 Level Shift TPS65198
EPI CH4 +/-
EPI CH5 +/-
EPI CH6 +/-
VCOM_P VCOM_N VCOM_LOOP
VCOM
EPI CH1 +/-
EPI CH2 +/-
EPI CH3 +/-
VCOM_DYN VCOMLFB
VCOMRFB
GMA1/GMA3/GAM9/GMA10/GMA16/GMA18
VDD
VCC
VCC1.8
CLK1_I~CLK6_I
GMA4/GMA5/GAM7/GMA12/GMA14/ GMA15
GMA4/GMA5/GAM7/GMA12/GMA14/GMA15
EO
GST
GCLK
MCLK
EPI_LOCK3
EPI_LOCK6_SOURCEEPI_LOCK6
H_VDD
TR/
Diode
TR/
Diode
SWP
CTRLP
SWN
CTRLN
VGH
VGL
VGL_I
VGH_EVEN/VGH_ODD
VGH_F/VGH_R
6
6
2
2
2
2
2
2
2
2
6
VST
GIP_RST
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

9. PMIC & Level Shift Bloc Diagram
PMIC
TPS65178
Boost Converter
Buck 1 converter(VCC)
Buck 2 converter(Vcore)
Buck 3 converter(HVdd)
Buck 4 converter(VCC18)
Positive Charge Pump Controller
Negative Charge Pump Controller
6-Ch Gamma Buffer(DAC output)
Vcom reference & gain
Reset
PANEL_VCC
VCC18
VCC
HVdd
Vdd
VCOM_P
VCOM_N
GAM4/5/7/12/14/15
CTRLN
SWP
SWN
CTRLP
VCOM_LOOP
PMIC_RESET
Vcore
Level Shift
TPS65198
TR/
Diode
TR/
Diode
VGL
VGH
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

10. USB / WIFI / M-REMOTE / UART
LGE 2122
USB1
USB_DP1
USB_DM1
[USB_DP_P2]
[USB_DM_P2]
USB2
USB_DP2
USB_DM2
[GPIO43]
[GPIO46] OCP
OCP
+5V_USB_1
+5V_USB_2
/USB_OCD1
USB_CTL1
USB_CTL2
/USB_OCD2
USB_WIFI
WIFI_DM
WIFI_DP
Motion Remote
Receiver
M_REMOTE_RX
M_REMOTE_TX
M_RFModule_RESET
[U1RX]
[U1TX]
[OPCTRL49]
[OPCTRL50]
[USB_DM_P3]
[USB_DP_P3]
RENESAS MICOM
[U0TX]
[U0RX]
SOC_TX
SOC_RX
USB_DP3 +5V_USB_3
USB_CTL3
/USB_OCD3
[USB_DM_P1]
[USB_DP_P1]
[GPIO42]
[TCON12]
[USB_DM_P0]
[USB_DP_P0]
USB3
USB_DM3
[GPIO44]
[ADIN2_SRV]
CTS
RTS
[ADIN4_SRV]
4Pin debugging
wafer
HDMI2
HDMI3
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

1 / 88
Interconnection - 1
1 Main PCB
2 Power Board
3 Local key Assy
1
2
3
4
5
Main / LPB 24Pin + Local
Dimming Cable
Main / Module EPI Cable
50& 50Pin
LED driver / PSU
IR 8Pin Cable
WiFi 6Pin + RF 8Pin Cable
SPK Cable
[PCBs]
[Cables]
6
1
2
3
1
2
3
4
5
6
47LA660S-ZA
4 5
4 RF Assy
5 WIFI Assy
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

2 / 88
8
7
Interconnection - 2
IR to Local Key 3Pin Cable
IR to Logo Assy 4Pin Cable
[Cables]
7
8
[PCBs]
6 IR Assy
6
47LA660S-ZA
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only

3 / 88
Introductions of 13Y RF ass’y + Magic Remote control
1. System
2. Remote Buttons
3. MR13 Block Diagram
4. Function List
5. Pairing/Un-pairing Method
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only