LG 42LT777H Service Manual page 28

EAX6430790* : LD22* / LC22*
EAX6443420* : LT22* / LJ22* / LA22* / LB22*
IC104-*1
M24256-BRMN6TP
NVRAM
+3.3V_NORMAL E0 VCC
1 8
E1 WC
2 7
E2 SCL
3 6
IC104 +3.3V_NORMAL
VSS SDA
4 5
AT24C256C-SSHL-T
NVRAM_ST
R104 A0 VCC
1 8
Write Protection
4.7K
OPT A1 WP - Low : Normal Operation
2 7
- High : Write Protection
A2 SCL
R136 33
3 6
GND SDA
R137 33
4 5
NVRAM_ATMEL
+3.3V_NORMAL
HDCP EEPROM
HDCP_EEPROM_ST
IC100
M24C16-R
C101
0.1uF
16V
NC_1 VCC
1 8
NC_2 WC R181 4.7K
2 7
R191 22
NC_3 SCL
3 6 I2C_SCL1
VSS SDA R192 22
4 5 I2C_SDA1
I2C
R128 R131 R134 R139 R142 R173
1.2K 1.2K 2.7K 2.7K 2.7K 2.7K
R110 33
STB_SCL
R111 33
STB_SDA
R112 33
OPCTRL_11_SCL
R113 33
OPCTRL_10_SDA
R114 33
OSCL1
R115 33
OSDA1
R116 33
OSCL2
R117 33
OSDA2
R118 33
OSCL0
R121 33
OSDA0
R122 33
OPCTRL_1_SCL
R123 33
OPCTRL_0_SDA
Model Option
+3.3V_NORMAL
R179
M_RFModule_ISP
22
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
IC104-*2
R1EX24256BSAS0A
+3.3V_NORMAL
A0 VCC
1 8
A1 WP
2 7
A2 SCL
3 6
VSS SDA
4 5
JTAG
AR100 R146
10K 10K
NVRAM_RENESAS
JTAG JTAG
JTRST#
JTDI
I2C_SCL5
JTMS
JTCLK
I2C_SDA5
R143 33
JTDO
JTAG
+3.3V_NORMAL
R144
10K
JTAG
HDCP_EEPROM_MICRO
IC100-*1
R145 R149
24LC16B 10K
10K
JTAG JTAG
A0 8 VCC
1
A1 WP
2 7
A2 SCL
3 6
VSS SDA
4 5
+3.3V_NORMAL
R147 R153
R150
1K 1K
1K
OPT
OPT
LED_PWM0
LED_PWM1
OPCTRL3
R151
R148 R154
1K
1K 1K
OPT
I2C_1 : AMP, L/DIMMING
I2C_2 : T-CON
I2C_3 : MICOM
I2C_4 : S/Demod,T2/Demod, LNB
I2C_5 : NVRAM, HDCP KEY
+3.3V_NORMAL I2C_6 : TUNER_MOPLL(T/C,ATV)
R185 R188 R156 R160
R164 R177
2.7K 2.7K
2.7K 2.7K
2.7K 2.7K
I2C_SCL1
I2C_SDA1
I2C_SCL2
I2C_SDA2
I2C_SCL3
I2C_SDA3
I2C_SCL4
I2C_SDA4
I2C_SCL5
I2C_SDA5
I2C_SCL6
I2C_SDA6
NO_FRC
MODEL_OPT_0
0
MODEL_OPT_1
0
MODEL_OPT_0
MODEL_OPT_1
MODEL_OPT_2
MODEL_OPT_2
MODEL_OPT_3
MODEL_OPT_3
/S2_RESET
MODEL_OPT_4
3D DEPTH
MODEL_OPT_4
MODEL_OPT_5
MODEL_OPT_5 DDR
MODEL_OPT_6
MODEL_OPT_6 CP BOX
MODEL_OPT_7
MODEL_OPT_8 MODEL_OPT_7
T2 Tuner
MODEL_OPT_9
MODEL_OPT_8
S Tuner
MODEL_OPT_10
MODEL_OPT_9
Reserved
MODEL_OPT_10 EPI
MODEL OPTION 8 is just for CP Box
It should not be appiled at MP
+3.3V_NORMAL
Close to eMMC Flash
JTAG
(IC8100)
R152
1K P100
12507WS-12L
JTAG
EMMC_CLK
1
2 R174
10K
3
4
5
6
7
8
9
10
11
12
13
STRAPPING LED_PWM0 LED_PWM1 OPCTRL3
ICE mode + 27M + Serial boot 0 0 0
ICE mode + 27M + ROM to Nand boot 0 0 1
ICE mode + 27M + Rom to eMMC boot 0 1 0
from eMMC pins (share pins w/s NAND)
ICE mode + 27M + ROM to eMMC boot 0 1 1
from SDIO pins
To HDMI
SoC
internal LG FRC2 Reserved
FRC
0 1 1
1 0 1
HIGH LOW
FHD HD
OPTIC NON_OPTIC
3D_Depth_IC
NON_3D_Depth_IC
DDR_768MB DDR_Default
Enable Disable
Support Not Support
Support Not Support
Default
Support
Not Support
Crystal Matching Test result
: 27pF -> 20pF -> 24pF
X-TAL
MT5369_XTAL_IN
C113
24pF
LGE2112
AP14
JTCLK JTCK
AM14
JTDI JTDI
AR14
JTDO JTDO
AR15
JTMS
JTMS
AN14
JTRST# JTRST
AP12
OSDA0 OSDA0
AN12
OSCL0
OSCL0
AP15
OSDA1
OSDA1
AN15
OSCL1 OSCL1
AT34
MT5369_XTAL_IN XTALI
AU34
MT5369_XTAL_OUT XTALO
AVDD_33SB
AK27
AVDD33_XTAL_STB
AH26
C116
AVSS33_XTAL_STB
0.1uF
AVDD_33SB
AK18
AVDD33_VGA_STB
C117 AK17
AVSS33_VGA_STB
0.1uF
VDD3V3
AK23
AVDD33_PLLGP
C118 AM27
AVSS33_PLLGP
0.1uF
AJ20
AVDD10_LDO
C107 C108
2.2uF
2.2uF
10V
10V
H32
GPIO0
F37
GPIO1
F36
GPIO2
G37
LAN1_DET GPIO3
G36
LAN2_DET GPIO4
G35
GPIO5
G34
GPIO6
H34
GPIO7
L34
GPIO8
L32
GPIO9
K33
GPIO10
K32
GPIO11
H33
GPIO12
L35
GPIO13
K36
GPIO14
J32
GPIO15
J34
GPIO16
K34
GPIO17
K35
GPIO18
K37
GPIO19
J36
GPIO20
J37
GPIO21
J35
GPIO22
J33
GPIO23
G33
GPIO24
H35
GPIO25
H31
GPIO26
F34
GPIO27
EXT_PWR_DET E36
EXT_PWR_DET GPIO28
100
R1015 OPT N33
OPC_EN GPIO29
R1016 100 P32
GPIO30
R1004 OPT 100 M35
GPIO31
R1014 0 OPT M37
HDMI_CEC_MTK
GPIO32
M33
GPIO33
F35
GPIO34
E35
GPIO35
E37
GPIO36
N32
GPIO37
M34
GPIO38
M36
GPIO39
M32
GPIO40
L33
GPIO41
E33
RESET_BY_CPU
GPIO42
E32
/USB_OCD1
GPIO43
F32
PTC_WOL GPIO44
R1010 100 A29
/UPDATE_BY_CPU
GPIO45
D31
USB_CTL1
GPIO46
C31
C102 C106 /USB2SER_RESET
GPIO47
R1012 OPT 0
0.1uF 0.1uF E30
/PROIDIOM_RESET_SOC GPIO48
OPT OPT E31
/TU_RESET_1
MODEL_OPT_0
R1013 GPIO49
F31
0
MODEL_OPT_1 GPIO50
OPT
E29
ERROR_OUT GPIO51
AP9
MODEL_OPT_3 GPIO52
AT9
M_RFModule_ISP MODEL_OPT_7 GPIO53
AR9
MODEL_OPT_5 GPIO54
AU9
MODEL_OPT_6 GPIO55
R193 10K AN23
ADIN0_SRV
R176
10K AN24
ADIN1_SRV
R162
10K AP23
ADIN2_SRV
R163 10K
AR23
ADIN3_SRV
AU23
M_RFModule_RESET
ADIN4_SRV
AT23
/LGDT3305_RESET ADIN5_SRV
AM24
/TU_RESET ADIN6_SRV
AM23
MODEL_OPT_4 /S2_RESET ADIN7_SRV
xxLT760H-UA
MID_MAIN_1
12pF crystal & load cap.
X100-*1
27.0MHZ
X100
12pF Crystal
27MHz
R119
MT5369_XTAL_OUT
0
C113-*1 C115-*1
C115
8pF 8pF
24pF
50V 50V
12pF crystal 12pF crystal
IC105
AR18
U0TX SOC_TX
AP18
U0RX SOC_RX
PTC Interface
AU16
U1RX PTC_TX_MTK
AT16
U1TX PTC_RX_MTK_3.3V
A35
POWE EMMC_CMD
C33
POOE
B34
EMMC_DATA[2-7]
POCE1
D33
POCE0 EMMC_DATA[7]
D29
PDD7
EMMC_DATA[6]
C30
PDD6 EMMC_DATA[5]
D30
PDD5
EMMC_DATA[4] +3.3V_NORMAL
B31
PDD4
EMMC_DATA[3]
A31
PDD3
EMMC_DATA[2]
B32 R157
PDD2
A32 4.7K
PDD1 OPT
C32
PDD0
D32
R178
PARB
A34
4.7K
PACLE EMMC_DATA[1]
C34 OPT
EMMC_DATA[0]
PAALE
C29
+3.3V_NORMAL
EMMC_CLK EMMC_CLK
AM20
OPWRSB R155
10K
R1001 100
AM22
ORESET
Q1001
C
MMBT3904(NXP)
AU21 R158 33
OIRI IR B
SOC_RESET
OPT
R1002
D27 R159 4.7K
10K
FSRC_WR
E
AT21
STB_SCL
STB_SCL
AR21 R172 22
STB_SDA STB_SDA
OPT C114
T34
0.1uF
DEMOD_RST
T32
16V
TS_S_IN_0_CLK
DEMOD_TSCLK
T36 OPT
TS_S_IN_0_DATA
DEMOD_TSDATA0
U36
DEMOD_TSDATA1 TS_S_IN_1_CLK
T33
TS_S_IN_1_VAL
DEMOD_TSDATA2
T30
TS_S_IN_1_SYNC
DEMOD_TSDATA3
SOC <- P:I
V33
TS_S_IN_1_DATA
DEMOD_TSDATA4
V32
DEMOD_TSDATA5
SOC <- Ext. Demod.
V31
DEMOD_TSDATA6
V30
DEMOD_TSDATA7
T35
TS_S_IN_0_SYNC
DEMOD_TSSYNC
T31
TS_S_IN_0_VAL
DEMOD_TSVAL
N36
CI_INT
T37
CI_TSCLK
R35
CI_TSDATA0
R37
CI_TSSYNC
R36
CI_TSVAL SOC -> P:I
R34
R1005 22
TS_S_OUT_CLK
PVR_TSCLK
R32 R1006
22 TS_S_OUT_VAL
PVR_TSVAL
R33
R1007 22
TS_S_OUT_SYNC
PVR_TSSYNC
P33 R1008 22
PVR_TSDATA0 TS_S_OUT_DATA
P34
PVR_TSDATA1
N37
SPI_CLK1 +3.3V_NORMAL
P35
SPI_CLK
N34
SPI_DATA R161
N35 R166 R168
4.7K
SPI_CLE 2.7K 4.7K
OPT
OPT OPT
AU12 R171 22
PWM_DIM2
OPWM2
AT12
OPWM1 PWM_DIM1
AR12 R169 10K R170 22
A_DIM
OPWM0
OPT
C120
A37 R197 R198
2.2uF
SD_D0 1K 1K
C35
10V
SD_D1
A36 OPT
SD_D2
B35 PWM2_PULL_DOWN_1K
PWM1_PULL_DOWN_1K
SD_D3
B36
SD_CMD
B37
SD_CLK
AT11
LDM_CS
AU11
L/DIM0_SCLK
LDM_CLK
AR10
LDM_VSYNC L/DIM0_VS
AM9
L/DIM0_MOSI
LDM_DO
AP10
LDM_DI
AN22
LED_PWM1
LED_PWM1
AP21
LED_PWM0 LED_PWM0
5V Tolerance
AU20
OPCTRL11 OPCTRL_11_SCL
AT20
OPCTRL10 OPCTRL_10_SDA
AN18
OPCTRL9
100 OPT
AP20 R1011
/USB_OCD2
OPCTRL8
AM18
DSUB_DET
OPCTRL7
AN19
USB_CTL2
OPCTRL6
AP19
AV1_CVBS_DET
OPCTRL5
AR19
C122 C121
OPCTRL4 AMP_RESET_SOC
AN21
0.1uF 0.1uF
OPCTRL3
OPCTRL3
AM19
R1009 0 OPT OPT
OPCTRL2 EXT_SPK_DET
AN20
OPCTRL1 OPCTRL_1_SCL
AR20
OPCTRL0 OPCTRL_0_SDA
2011.09.29
8
LGE Internal Use Only