LG 42LN54XX / 42LN540S / 42LN540V / 42LN541V / 42LN542V (CHASSIS:LD31B / LD36B) Service Manual ▷ View online
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.
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.
2012/07/05
MAIN2_EU_OS
2
NC4_S7LRM
L205
HEAD_PHONE
5.6uH
AVDD_AU33
MODEL_OPT_5
SCART1_Lout
C251
0.1uF
F_NIM/CHINA
C250
0.1uF
F_NIM/CHINA
MIUVDDC
AVDD2P5_MOD
IF_AGC_MAIN
C224
1000pF
HDMI_ARC
D2+_HDMI4
HP_LOUT
C287
100pF
OPT
L211
BLM18PG121SN1D
C212
0.047uF
EU
CK-_HDMI4
C286
0.1uF
0.1uF
ESD_0.1uF
VDD33
L229
BLM18PG121SN1D
AUD_MASTER_CLK_0
COMP2_Y+/AV_CVBS_IN
C273
0.1uF
C266
0.1uF
HP_ROUT
R200
62K
R211
1K
MODEL_OPT_PHM(O)
C219
0.047uF
R257
33
EU
C231
1uF
HDMI1_ARC
+3.5V_ST
R220
10K
NON_DVB_T2
EPHY_RP
COMP2_Y+/AV_CVBS_IN
COMP2_L_IN
C216
0.047uF
EU
R210
0
HDMI1_ARC
SOC_RESET
AVDD_AU33
SC1/COMP1_R_IN
VDD33
SIDE_USB1_DP
TU_SCL
R212
1K
MODEL_OPT_PHM(X)
R222
1K
MODEL_OPT_DVB_S(O)
C252
0.1uF
0.1uF
ESD_0.1uF
R246
33
R240
68
HPD4
C226
0.047uF
EU
L227
BLM18PG121SN1D
NON_DVB_T2
MODEL_OPT_1
C264
1000pF
OPT
50V
COMP2_R_IN
X201
24MHz
24MHz
R216
47
F_NIM/CHINA
CEC_REMOTE_S7
C259
0.1uF
C285
0.047uF
25V
0.047uF
25V
NON_DVB_T2
C257
0.1uF
NON_DVB_T2
MIUVDDC
C282
0.1uF
NON_DVB_T2
R214
22
DVB_S
COMP2_DET
R208
1K
MODEL_OPT_DVB_T2(O)
C214
0.047uF
EU
EPHY_TP
R244
33
F_NIM/CHINA
C258
0.1uF
NON_DVB_T2
CK+_HDMI4
R221
1K
MODEL_OPT_MIU0_2G
L206
BLM18PG121SN1D
L228
BLM18PG121SN1D
C245
0.1uF
R288
100
NON_DVB_T2
C263
10uF
10uF
DTV/MNT_VOUT
C283
0.1uF
C209
0.1uF
C248
0.1uF
COMP2_Pb+
R254
68
EU
D1-_HDMI4
SW200
JTP-1127WEM
SWICH
1
2
4
3
C218
0.047uF
AUD_LRCK
C291
0.1uF
16V
0.1uF
16V
+1.10V_VDDC
SCART1_Rout
C222
0.047uF
AUD_LRCH
R255
33
EU
C221
0.047uF
R256
68
EU
R294
1K
MODEL_OPT_MIU1_NO_DDR
+1.5V_DDR
L209
BLM18PG121SN1D
R239
33
C207
0.1uF
POWER_DET_RESET
CI_DET
DEMOD_SCL
L203
HEAD_PHONE
5.6uH
+3.5V_ST
C203
1000pF
OPT
50V
DEMOD_SDA
AVDD_NODIE
C235
0.1uF
C227
0.047uF
TU_SDA
R205
100
100
SWICH
R291
1K
MODEL_OPT_MIU1_1G
PM_MODEL_OPT_1
R213
22
DVB_S
D1+_HDMI4
C213
0.047uF
EU
R223
1K
MODEL_OPT_MIU0_1G
C243
2.2uF
DDC_SDA_4
SC1_ID
D0-_HDMI4
R266
470
RESET_IC_SOC_RESET
C256
0.1uF
0.1uF
AVDD_NODIE
L202
BLM18SG121TN1D
R219
0
NON_DVB_T2
MODEL_OPT_7
+1.10V_VDDC
C255
0.1uF
R290
1K
MODEL_OPT_DUAL
TU_CVBS
IF_N_MSTAR
+3.3V_Normal
C217
1000pF
EU
AVDD_MIU
R242
68
SC1_R+/COMP1_Pr+
MODEL_OPT_4
DDC_SCL_4
+1.10V_VDDC
C242
2.2uF
R293
1K
MODEL_OPT_NON_DUAL
SC1_B+/COMP1_Pb+
EPHY_TN
+3.3V_Normal
C225
0.047uF
F_NIM/CHINA
R227
1K
MODEL_OPT_FHD
+3.3V_Normal
C220
0.047uF
R236
0
OPT
L208
BLM18PG121SN1D
R209
1K
MODEL_OPT_DVB_T2(X)
+2.5V_Normal
SC1_CVBS_IN
D0+_HDMI4
C240
0.1uF
0.1uF
C274
0.1uF
R206
1K
MODEL_OPT_M120
D2-_HDMI4
FB_CORE
SOC_RESET
MODEL_OPT_2
R226
1K
MODEL_OPT_HD
MODEL_OPT_6
C223
0.047uF
R296
100
SPDIF_OPTIC
C268
4.7uF
10V
4.7uF
10V
HEAD_PHONE
AVDD2P5_MOD
C272
4.7uF
10V
4.7uF
10V
HEAD_PHONE
R218
47
F_NIM/CHINA
+1.10V_VDDC
C211
0.047uF
EU
L204
BLM18PG121SN1D
SIDE_USB1_DM
AMP_SDA
AMP_SCL
C253
1uF
SC1_FB
AVDD_MIU
R287
1M
TU_SIF
COMP2_Pr+
SC1_G+/COMP1_Y+
R252
68
R258
68
EU
C249
4.7uF
4.7uF
R237
33
AVDD2P5
+3.3V_Normal
EPHY_RN
MODEL_OPT_0
C241
0.1uF
0.1uF
VDD33
TP209
IR
C233
0.047uF
MODEL_OPT_3
R245
33
EU
R289
100
NON_DVB_T2
SC1/COMP1_L_IN
R238
68
R241
33
R224
1K
MODEL_OPT_DVB_S(X)
AUD_SCK
R207
1K
MODEL_OPT_NON_M120
R253
33
EU
AVDD2P5
C215
0.047uF
EU
C201
0.1uF
16V
IF_P_MSTAR
SPDIF_OUT
FB_CORE
R297
0
OPT
C279
0.1uF
+2.5V_Normal
SC1_SOG_IN
C236
2.2uF
EU
C237
2.2uF
EU
HPD2
CK-_HDMI2
D1-_HDMI2
D0+_HDMI2
DDC_SCL_2
D1+_HDMI2
D0-_HDMI2
D2+_HDMI2
DDC_SDA_2
CK+_HDMI2
D2-_HDMI2
AVDD5V_MHL
/VBUS_EN
C284-*1
10uF 10V
CAP_10uF_X7R
C204-*1
10uF 10V
CAP_10uF_X7R
C269-*1
10uF 10V
CAP_10uF_X7R
C261
27pF
C262
27pF
LNA2_CTL
RF_SWITCH_CTL
IF_AGC_SEL
IC101
MSD804KKX
S7LR-M_NON_MS10
RXACKP
J2
RXACKN
J3
RXA0P
K3
RXA0N
J1
RXA1P
K2
RXA1N
K1
RXA2P
L2
RXA2N
L3
DDCDA_DA/GPIO27
T5
DDCDA_CK/GPIO26
T4
HOTPLUGA/GPIO22
V5
HOTPLUGD/GPIO25
R5
RXCCKP
AE9
RXCCKN
AC9
RXC0P
AC10
RXC0N
AD9
RXC1P
AC11
RXC1N
AD10
RXC2P
AE11
RXC2N
AD11
DDCDC_DA/GPIO31
AE8
DDCDC_CK/GPIO30
AD8
HOTPLUGC/GPIO24
AC8
RXBCKP
F2
RXBCKN
F3
RXB0P
G3
RXB0N
F1
RXB1P
G2
RXB1N
G1
RXB2P
H2
RXB2N
H3
DDCDB_DA/GPIO29
R6
DDCDB_CK/GPIO28
U6
HOTPLUGB/GPIO23
P5
CEC/GPIO5
R4
HSYNC0
P2
VSYNC0
R3
RIN0P
N2
RIN0M
P3
GIN0P
N3
GIN0M
N1
BIN0P
M3
BIN0M
M2
SOGIN0
M1
HSYNC1
V2
VSYNC1
V3
RIN1P
U3
RIN1M
U2
GIN1P
T1
GIN1M
T2
BIN1P
R2
BIN1M
R1
SOGIN1
T3
HSYNC2
AA2
RIN2P
Y2
RIN2M
AA3
GIN2P
W2
GIN2M
Y3
BIN2P
V1
BIN2M
W3
SOGIN2
W1
CVBS0
AA8
CVBS1
Y4
CVBS2
W4
CVBS3
AA5
NC_5
Y5
NC_7
AA4
NC_6
Y6
CVBSOUT1
AA1
VCOM
AB4
NC_8
AC4
NC_9
AD3
IP
AC3
IM
AE3
SIFP
AD4
SIFM
AC5
IF_AGC
AD2
RF_AGC
AE2
I2C_SCKM1/GPIO78
AE6
I2C_SDAM1/GPIO79
AD6
XIN
AD1
XOUT
AC1
SPDIF_IN/GPIO150
D7
SPDIF_OUT/GPIO151
D6
USB0_DM
E3
USB0_DP
E2
USB1_DM
AC12
USB1_DP
AE12
I2S_IN_BCK/GPIO148
C8
I2S_IN_SD/GPIO149
D8
I2S_IN_WS/GPIO147
D9
I2S_OUT_BCK/GPIO154
B10
I2S_OUT_MCK/GPIO152
C9
I2S_OUT_SD/GPIO155
B9
I2S_OUT_WS/GPIO153
C10
AUL0
AB9
AUR0
AA11
AUL1
Y9
AUR1
AA9
AUL2
AA7
AUR2
AB8
AUL3
Y8
AUR3
Y10
AUL4
AC7
AUR4
AD7
GPIO_PM[13]/GPIO19
W6
AUOUTL2
V6
AVDD5V_MHL
V4
GPIO_PM[14]/GPIO20
Y7
AUOUTR2
W5
GPIO_PM[15]/GPIO21
U5
AUVRM
AD5
AUVAG
AE5
AUVRP
AC6
EARPHONE_OUTL
AA6
EARPHONE_OUTR
AB6
RP/GPIO63
C6
TP/GPIO60
C5
RN/GPIO66
A6
LED1/GPIO59
C4
TN/GPIO62
B5
GPIO61
C3
GPIO64
A3
GPIO65
B3
LED0/GPIO58
B4
IRIN/GPIO4
N4
ARC0
T6
HWRESET
N5
IC101
MSD804KKX
S7LR-M_NON_MS10
AVDDLV_USB
K12
VDDC_1
G9
VDDC_2
H9
VDDC_3
K10
VDDC_4
K11
VDDC_5
L10
VDDC_6
M12
VDDC_7
M13
VDDC_8
N12
VDDC_9
P14
VDDC_10
P15
VDDC_11
R10
VDDC_12
R14
VDDC_13
R15
VDDC_14
T10
NC_2
P10
FB_CORE
P19
AVDDL_MOD
R16
NC_1
L11
DVDD_DDR
M14
AVDD2P5_ADC_1
W9
AVDD2P5_ADC_2
W10
AVDD2P5_ADC_3
W11
AVDD2P5_ADC_4
W12
AVDD25_LAN
Y17
AVDD_MOD_1
V18
AVDD_MOD_2
U19
NC_3
W14
NC_4
W15
AVDD_NODIE
U7
AVDD_DVI_USB_1
L7
AVDD_DVI_USB_2
M7
AVDD3P3_MPLL
P7
AVDD_DMPLL
R7
DVDD_NODIE
M19
AVDD_AU33
V7
AVDD_EAR33
W7
VDDP_1
R19
VDDP_2
T19
AVDD_LPLL_1
W18
AVDD_LPLL_2
W19
VDDP_NAND
V19
AVDD_DDR0_D_1
J17
AVDD_DDR0_D_2
K15
AVDD_DDR0_D_3
K16
AVDD_DDR0_C
L15
AVDD_DDR1_D_1
K17
AVDD_DDR1_D_2
L17
AVDD_DDR1_D_3
M17
AVDD_DDR1_C
L16
GND_EFUSE
E9
GND_1
A23
GND_2
B17
GND_3
C23
GND_4
A5
GND_5
C11
GND_6
C19
GND_7
C22
GND_8
D14
GND_9
D18
GND_10
D19
GND_11
E17
GND_12
E18
GND_13
E19
GND_14
E22
GND_15
F8
GND_16
F17
GND_17
F18
GND_18
F19
GND_19
G8
GND_20
H8
GND_21
N22
GND_22
N21
GND_23
N20
GND_24
M22
GND_25
M21
GND_26
M20
GND_27
F10
GND_28
V15
GND_29
W16
GND_30
V8
GND_31
T18
GND_32
G10
GND_33
G11
GND_34
G12
GND_35
G13
GND_36
G14
GND_37
G17
GND_38
G18
GND_39
G19
GND_40
G24
GND_41
H11
GND_42
H12
GND_43
H13
GND_44
H14
GND_45
H15
GND_46
H16
GND_47
H17
GND_48
H18
GND_49
H19
GND_50
J9
GND_51
J10
GND_52
J11
GND_53
J12
GND_54
J13
GND_55
J14
GND_56
J15
GND_57
J16
GND_58
J18
GND_59
J19
GND_60
J25
GND_61
K9
GND_62
K13
GND_63
K14
GND_64
H10
GND_65
K18
GND_66
K19
GND_67
K22
GND_68
L8
GND_69
L9
GND_70
J8
GND_71
L12
GND_72
L13
GND_73
L18
GND_74
L19
GND_75
M8
GND_76
K8
GND_77
M10
GND_78
M11
GND_79
L14
GND_80
M15
GND_81
M16
GND_82
M18
GND_83
M25
GND_84
N10
GND_85
N11
GND_86
N13
GND_87
N14
GND_88
N15
GND_89
N16
GND_90
N17
GND_91
N19
GND_92
K7
GND_93
P8
GND_94
P9
GND_95
M9
GND_96
P11
GND_97
P13
GND_98
P16
GND_99
P17
GND_100
P18
GND_101
P12
GND_102
R8
GND_103
R9
GND_104
R11
GND_105
R12
GND_106
R13
GND_107
R17
GND_108
T8
GND_109
T9
GND_110
N7
GND_111
T11
GND_112
T12
GND_113
T13
GND_114
T14
GND_115
T15
GND_116
T16
GND_117
T17
GND_118
U8
GND_119
U9
GND_120
U10
GND_121
U11
GND_122
U12
GND_123
U13
GND_124
U14
GND_125
U15
GND_126
U16
GND_127
U17
GND_128
R18
GND_129
V9
GND_130
V10
GND_131
V11
GND_132
V12
GND_133
V14
GND_134
V17
GND_135
T7
GND_136
E8
10uF
10V
C284
CAP_10uF_X5R
85C
10uF
10V
C204
CAP_10uF_X5R
85C
R217
0
MHL_CD_SENSE
RF_SWITCH_CTL
R203
100
RF_SW_OPT
L207
BLM18PG121SN1D
AVDD_DMPLL
AVDD_DMPLL
C289
33pF
NON_DVB_T2
C288
33pF
NON_DVB_T2
C205
0.1uF
0.1uF
ESD_0.1uF
10uF
C269
CAP_10uF_X5R
POWER_ON/OFF_2
URSA_SDA
URSA_SCL
POWER_ON/OFF_2
URSA_SCL
URSA_SDA
R231
2.2
R232
2.2
C202
4.7uF
10V
RESET_IC_SOC_RESET
C200
4.7uF
10V
+3.5V_SOC_RESET
C254
1uF
10uF
10V
C278
C260
1uF
C277
1uF
C280
1uF
10uF
10V
C275
10uF
10V
C228
10uF
10V
C296
C205-*1
1uF
10V
1uF
10V
ESD_1uF
C252-*1
1uF
10V
1uF
10V
ESD_1uF
C286-*1
1uF
10V
1uF
10V
ESD_1uF
MODEL OPTION
AUDIO OUT
DTV_ATV_IF
Close to MSTAR
SCART1_RGB/COMP1
AVDD_DDR1:55mA
H/P OUT
VDDC 1.05V
SIDE USB
DDR3 1.5V
SOC_RESET
I2S_I/F
TUNER_I2C
HDMI
AVDD25_PGA:13mA
AVDD2P5:172mA
AUDIO IN
CVBS In/OUT
ANALOG SIF
Close to MSTAR
COMP2
Close to MSTAR
VDDC : 2026mA
Normal 2.5V
AVDD_DDR0:55mA
STby 3.5V
Normal Power 3.3V
Close to MSTAR
*H/W opt :
EU
EU
SYM.C
SYM.E
AVDD25_PGA
AVSS_PGA
Memory
MODEL_OPT_4
MODEL_OPT_6
PIN NO.
Memory OPTION
U23
B8
128M
128M+128M
256M+128M
256M
PIN NO.
0
0
0
0
1
1
1
1
Note
Ginga
CHANGE TO X5R
CHANGE TO
10UF 10V X5R
10UF 10V X5R
CHANGE TO
10UF 10V X5R
10UF 10V X5R
CHANGE TO
10UF 10V X5R
10UF 10V X5R
MODEL_OPT_5
PIN NAME
HD
HIGH
NON_DVB_T2
F4
DVB_T2
NON_DVB_S
PHM_OFF
MIU1-128M
MODEL OPTION
* Dual Stream is only Korea 3D spec
MODEL_OPT_7
LOW
T25
MIU0-128M
MIU0-256M
A8
PIN NO.
NON_DUAL_STREAM
PHM_ON
MODEL_OPT_0
MODEL_OPT_2
U23
T24
AB3
B8
AB2
MODEL_OPT_6
MIU1-NO_DDR
DVB_S
MODEL_OPT_3
MODEL_OPT_4
NON_M120
FHD
MODEL_OPT_1
DUAL_STREAM
M120
THERMAL
THERMAL
THERMAL
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.
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.
Power_PD2
2012/09/19
4
NC4_S7LRM
R403
1.5K
1.5K
1%
PD_+24V
Q407
MMBT3904(NXP)
MMBT3904(NXP)
E
B
C
R491
0
C448
3300pF
50V
IC407
AP7173-SPG-13 HF(DIODES)
3
VCC
2
PG
4
EN
1
IN
5
GND
6
SS
7
FB
8
OUT
9
[EP]
+12V
C422
0.1uF
16V
0.1uF
16V
OPT
R441
75K
1/16W
1%
R426
10K
10K
+3.5V_ST
C424
330pF
50V
IC403
TPS54319TRE
1
VIN_1
3
GND_1
7
COMP
9
SS/TR
10
PH_1
11
PH_2
12
PH_3
13
BOOT
14
PWRGD
15
EN
16
VIN_3
5
AGND
8
RT/CLK
6
VSENSE
4
GND_2
2
VIN_2
17
EP[GND]
Q403
AO3435
FET_2.5V_AOS
G
D
S
+3.3V_Normal
PANEL_VCC
Q409
AO3407A
G
D
S
R402
300
300
RESET_IC_SOC_RESET
L413
CIC21J501NE
PWM_DIM
Q401
MMBT3904(NXP)
MMBT3904(NXP)
E
B
C
R419
1K
C406
0.1uF
16V
R457
4.3K
4.3K
1/16W
1%
1%
R412
3.9K
PWM_DIM_PULL_DOWN
R417
4.7K
OPT
4.7K
OPT
+1.5V_DDR
R432
330K
1/16W
5%
R462
10K
L404
CIC21J501NE
R430
10K
10K
P401
SMAW200-H18S1
14
12V
9
24V
4
PDIM#1
18
GND
13
12V
8
GND
3
3.5V
17
GND
12
GND
7
GND
2
DRV ON
16
N.C
11
GND
6
PDIM#2
1
PWR ON
15
12V
10
24V
5
3.5V
19
.
+24V
C440
0.1uF
16V
0.1uF
16V
Q400
MMBT3904(NXP)
MMBT3904(NXP)
E
B
C
C417-*1
10uF 10V
CAP_10uF_X7R
R489
10K
+3.5V_ST
R439
33K
R453
27K
1%
R445
2.2K
IC409
NCP803SN293
PD_+24V_PWR_DET_ON_SEMI
1
GND
3
VCC
2
RESET
C412
0.1uF
16V
0.1uF
16V
PD_+24V
C447
0.33uF
16V
R443
10K
10K
+12V
INV_CTL
L408
CIC21J501NE
R448
2.7K
2.7K
1%
PD_+12V
+3.5V_ST
R461
10K
10K
OPT
R440
5.6K
+3.5V_ST
R421
10K
10K
R488
100K
100K
Q405
MMBT3904(NXP)
E
B
C
L412
CIS21J121
120
C403-*1
10uF 10V
CAP_10uF_X7R
R428
10K
10K
C411
0.1uF
16V
0.1uF
16V
C426
100pF
50V
OPT
R410
100K
C441
0.1uF
16V
C413
0.047uF
25V
0.047uF
25V
L403
BLM18PG121SN1D
C444
0.1uF
16V
0.1uF
16V
+3.3V_Normal
+3.3V_Normal
Q403-*1
DMP2130L
FET_2.5V_DIODE
G
D
S
IC408
NCP803SN293
PWR_DET_ON_SEMI
1
GND
3
VCC
2
RESET
R450
0
5%
PD_+3.5V
R447
1.2K
1.2K
1%
PD_+12V
560pF
C467
50V
L402
MLB-201209-0120P-N2
R414
10K
10K
+12V
+5V_Normal
POWER_ON/OFF_1
C418
0.1uF
50V
+1.10V_VDDC
POWER_DET
RL_ON
C420
22uF
16V
22uF
16V
R413
20K
20K
IC408-*1
APX803D29
PWR_DET_ON_DIODES
1
GND
3
VCC
2
RESET
+3.3V_Normal
+12V
R480
100
100
PD_+24V
R454
11K 1%
R456
4.7K
1/16W
1%
1/16W
1%
+24V
+3.5V_ST
L407
MLB-201209-0120P-N2
+3.5V_ST
+3.3V_Normal
USB1_CTL
R438
22K
22K
R433
10K
10K
R436
15K
15K
+3.5V_ST
C425
0.1uF
16V
R408
100
PWM2_2CH_POWER
PANEL_CTL
001:AL22
+5V_USB
R434
10K
R409
2K
R416
10K
R415
100
100
+3.5V_ST
POWER_DET_RESET
USB1_OCD
R463
10K
RESET_IC_SOC_RESET
+3.3V_Normal
L401
CIC21J501NE
L420
BLM18PG121SN1D
R482
8.2K
8.2K
1%
PD_+24V
+5V_Normal
C404
0.1uF
16V
C438
0.1uF
25V
0.1uF
25V
OPT
+2.5V_Normal
C474
0.1uF
0.1uF
R404
100K
PD_+24V
R405
5.6K
5.6K
C419
4.7uF 10V
C488
3300pF
R442
30K
1/16W
1%
R406
4.7K
4.7K
C405
10uF
16V
10uF
16V
+3.5V_ST
C410
3300pF
50V
3300pF
50V
C439
100pF
50V
R401
10K
IC409-*1
APX803D29
PD_+24V_PWR_DET_DIODES
1
GND
3
VCC
2
RESET
R407
5.6K
5.6K
R411
33K
OPT
Q402
MMBT3906(NXP)
1
2
3
C421
22uF
16V
22uF
16V
OPT
R452
33K
1%
C476
0.1uF
16V
PWM1
L406
3.6uH
L415
3.6uH
C403
10uF
10V
CAP_10uF_X5R
85C
C417
10uF
10uF
10V
CAP_10uF_X5R
85C
R402-*1
100
100
+3.5V_SOC_RESET
IC401
TPS65281RGV
TPS65281RGV
3
ROSC
2
COMP
4
RLIM
1
SS
5
EN_SW
6
FAULT
7
AGND
8
SW_OUT
9
SW_IN
10
FB
11
LX
12
BST
13
PGND
14
VIN
15
V7V
16
EN
17
[EP]
IC402
TJ1118S-2.5
1
GND
2
OUT
3
IN
C437
22uF
10V
22uF
10V
C430
10uF
10uF
10V
10uF
C461
10V
C423
2.2uF
10V
2.2uF
10V
C453
22uF
22uF
10V
C456
22uF
22uF
10V
C443
10uF
10uF
16V
C472
22uF
10V
D404
5V
OPT
D402
5V
OPT
D403
5V
OPT
OPT
D401
5V OPT
D405
5V
PANEL_POWER
+2.5V_Normal
S7LR core 1.15V volt
3A
CHANGE TO
16V/X5R
16V/X5R
R1
+3.5V_ST --> 3.375V --> 3.46V
CHANGE TO
10UF/10V/X5R
10UF/10V/X5R
+3.3V_Normal
CHANGE TO
10UF/10V/X5R
10UF/10V/X5R
Vout=0.8*(1+R1/R2)=1.5319
+5V_Normal
&
+5V_USB
&
+5V_USB
+1.5V_DDR
R2
Vout=0.827*(1+R1/R2)
R2
Power_DET
R1
R1
+24V --> 3.78V --> 3.92V (3.79V)
Vout=0.8*(1+R1/R2)
R2
FROM LIPS & POWER B/D
+12V --> 3.58V --> 3.82V (3.68V)
1.5A
L13 POWER BLOCK (POWER DETECT 2)
*For 55LN54 Power ON Noise
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.
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.
IR/CONTROL
2012/07/18
6
NC4_S7LRM
C607
0.1uF
16V
OPT
R601
100
100
+3.5V_ST
L600
BLM18PG121SN1D
KEY2
R602
10K
1%
IR
R600
100
100
C604
100pF
50V
+3.5V_ST
C603
1000pF
50V
R603
10K
1%
C602
0.1uF
16V
KEY1
+3.5V_ST
R607
3.3K
3.3K
LED_R/BUZZ
P600
12507WR-08L
1
2
3
4
5
6
7
8
9
R610
1.8K
1.8K
L601
BLM18PG121SN1D
CONTROL_FILTER
L602
BLM18PG121SN1D
CONTROL_FILTER
C608
0.1uF
16V
0.1uF
16V
CONTROL_FILTER
C609
0.1uF
16V
0.1uF
16V
CONTROL_FILTER
R611
0
0
CONTROL_NO_FILTER
R612
0
0
CONTROL_NO_FILTER
IR/LED and Control
U
S
B
D
O
W
N
S
T
R
E
A
M
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.
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.
12/06/20
USB
7
NC4_S7LRM
JK700
3
A
U
0
4
S
-
3
0
5
-
Z
C
-
(
L
G
)
1
2
3
4
5
D700
RCLAMP0502BA
OPT
SIDE_USB1_DM
SIDE_USB1_DP
+5V_USB
C700
22uF
10V
USB (SIDE)
Click on the first or last page to see other 42LN54XX / 42LN540S / 42LN540V / 42LN541V / 42LN542V (CHASSIS:LD31B / LD36B) service manuals if exist.