LG 50PM6900-UD (CHASSIS:PU22B) Service Manual ▷ View online
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.
AMP
+3.3V_MULTI
C811
0.1uF
50V
SPK_R-
AMP_RST
L801
10.0uH
SPK_R-
R802
2.2
C802
4700pF
50V
C807
0.1uF
50V
C810
1uF
25V
+3.3V_AMP
C821
0.22uF
50V
R804
10K
C805
0.1uF
16V
R801
0
C818
0.22uF
50V
L805
CIS21J121
C804
680pF
50V
L804
10.0uH
SPK_L-
C813
0.1uF
50V
SPK_L+
C806
0.1uF
16V
L803
10.0uH
AUD_SCK
C816
330pF
50V
R800
1K
+3.3V_AMP
AUD_LRCK
C808
0.1uF
16V
+3.3V_AMP
+3.3V_AMP
C820
0.22uF
50V
C824
1000pF
50V
C825
1000pF
50V
C803
0.1uF
16V
SPK_R+
R803
2K
SPK_R+
P800
WAFER-ANGLE
1
2
3
4
SPK_L+
C815
330pF
50V
IC800
STA368BWG
26
GND_PLL
27
XTI
28
BICKI
29
LRCKI
30
SDI
31
RESET
32
INT_LINE
33
SDA
34
SCL
35
GND_DIG_2
36
VDD_DIG_2
17
OUT3B/FFX3B
3
TEST_MODE
6
OUT2B
16
CONFIG
15
VDD
14
GND_REG
13
OUT1A
12
GND1
11
VCC1
10
OUT1B
9
OUT2A
8
VCC2
7
GND2
4
VSS
5
VCC_REG
2
SA
21
VDD_DIG_1
1
GND_SUB
20
TWARN/OUT4A
19
EAPD/OUT4B
18
OUT3A/FFX3A
23
PWRDN
24
VDD_PLL
25
FILTER_PLL
22
GND_DIG_1
37
[EP]GND
C809
0.1uF
50V
I2C_SCL1
L800
CIS21J121
I2C_SDA1
C822
0.22uF
50V
C817
0.22uF
50V
C826
1000pF
50V
C814
68uF
35V
AUD_LRCH
SPK_L-
L802
10.0uH
C823
1000pF
50V
C801
0.1uF
16V
AUD_MCLK
C812
1uF
25V
C819
0.22uF
50V
P_+17V
AC_DET
C827
10pF
10pF
OPT
AR800
100
R805
39
R806
39
R808
39
R807
39
JP800
JP801
JP802
JP803
Close to Output Pin
Close to IC Pin
Close to IC Pin
AUDIO AMP [STA368BW]
Close to IC Pin
Close to IC Pin
Close to IC Pin
Close to IC Pin
Close to IC Pin
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.
MICOM,SUB ASSY
R911
22
R914
4.7K
R932
10K
OPT
R930
10K
C900
0.1uF
16V
C907
0.1uF
16V
MICOM_RX
MODEL1_OPT_0
+3.3V_ST
MODEL1_OPT_3
+3.3V_ST
R902
10K
R901
10K
DEBUG
MODEL1_OPT_2
EEPROM_SDA
AC_DET
I2C_SCL3
MICOM_TX
SUB_SDA
R936
10K
OPT
Debug
R919 10K OPT
R909
22
JP901
R915 4.7K
R949
0
+3.3V_MULTI
R908
22
EEPROM_SCL
DISP_EN
R937
10K
OPT
+3.3V_ST
JP900
MODEL1_OPT_0
MODEL1_OPT_1
R904
10K
OPT
R926
10K
OPT
KEY1
SOC_RESET
IC900
M24C16-WMN6T
3
NC/E2
E2
2
NC/E1
E1
4
VSS
GND
1
NC/E0
NC
5
SDA
SDA
6
SCL
SCL
7
WC
WC
8
VCC
VCC
R916
22
R933
10K
OPT
R934
10K
OPT
EEPROM_SCL
HDMI_CEC
P900
12507WS-04L
DEBUG
1
2
3
4
5
R910
22
SUB_SCL
+3.3V_MULTI
+3.3V_ST
+3.3V_ST
IR_TX
SC_MUTE
EEPROM_SDA
I2C_SDA3
RESET
PSU_ERR_DET
C903
0.1uF
16V
MODEL1_OPT_3
+3.3V_ST
+3.3V_ST
R927
10K
OPT
KEY2
MOD_ON
R907
10K
OPT
Debug
R903
47K
RESET
+3.3V_ST
MODEL1_OPT_2
R900
1K
DEBUG
R913
10K
RL_ON
LED_R
R931
10K
OPT
MODEL1_OPT_1
X901
32.768KHz
R912
10K
POWER_ON1
POWER_ON2
POWER_ON3
POWER_ON4
KEY1
M_REMOTE_RX
R950
22
22
R945
22
R939
22
22
+3.3V_ST
KEY2
R924
2.7K
R943
10K
R952
22
22
+3.3V_ST
R940
22
22
OPT
C916
10pF
50V
OPT
C910
680pF
50V
OPT
M_REMOTE_ISP
R947
4.7K
R925
2.7K
+3.3V_MULTI
SUB_SCL
C915
10pF
50V
OPT
SUB_SDA
R944
22
C917
10pF
50V
C908
10pF
50V
OPT
R951
22
22
+3.3V_ST
C912
220pF
50V
R921
4.7K
OPT
M_REMOTE_TX
C913
10pF
50V
OPT
R946
10K
C914
10pF
50V
IR
3D_SYNC_RF
M_REMOTE_RST
C911
220pF
50V
C918
10uF
6.3V
R935
22
22
R953
22
22
LED_R
EDID_WP
IC901
R5F100GEAFB
1
2
3
4
5
6
7
8
9
10
11
12
13
P50/INTP1/SI11/SDA11
14
P51/INTP2/SO11
15
P17/TI02/TO02
16
P16/TI01/TO01/INTP5
17
P15/PCLBUZ1/SCK20/SCL20
18
P14/RXD2/SI20/SDA20
19
P13/TXD2/SO20
20
P12/SO00/TXD0/TOOLTXD
21
P11/SI00/RXD0/TOOLRXD/SDA00
22
P10/SCK00/SCL00
23
P146
24
P147/ANI18
25
P27/ANI7
26
P26/ANI6
27
P25/ANI5
28
P24/ANI4
29
P23/ANI3
30
P22/ANI2
31
P21/ANI1/AVREFM
32
P20/ANI0/AVREFP
33
P130
34
P01/TO00/RXD1
35
P00/TI00/TXD1
36
P140/PCLBUZ0/INTP6
37
P120/ANI19
38
P41/TI07/TO07
39
P40/TOOL0
40
RESET
41
P124/XT2/EXCLKS
42
P123/XT1
43
P137/INTP0
44
P122/X2/EXCLK
45
P121/X1
46
REGC
47
VSS
48
VDD
Q900
MMBT3904(NXP)
MMBT3904(NXP)
E
B
C
C909
68pF
50V
3D_SYNC_RF
R918
22
JP902
JP903
JP904
JP905
JP906
JP907
JP908
JP909
JP910
JP911
JP912
JP913
JP914
JP915
JP916
P901
SMAW200-H16S2
14
9
4
13
8
3
12
7
2
16
11
6
1
15
10
5
17
R928
33K
R929
33K
R920
15K
R906
15K
R905
100K
100K
OPT
C902
1uF
10V
C906
12pF
50V
R917
4.7K
+3.3V_ST
C905
12pF
50V
PZ95
11
31
PZ55
MODEL1_OPT_0
LOW
PIN NAME
PZ55/PZ75
PCB TOP
HIGH
MODEL1_OPT_3
ATSC
-
MICOM MODEL OPTION
PZ75/PZ95
MODEL1_OPT_1
FOR USE MICOM RESET
-
PIN NO.
PCB TOP
MODEL1_OPT_2
for Debugging
**ALL TOOL : LED_RED
30
8
DVB
to Sub Ass’y
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.
FE_TS_D[2]
FE_TS_D[1]
FE_TS_D[0]
FE_TS_D[3]
FE_TS_D[4]
FE_TS_D[6]
FE_TS_D[5]
FE_TS_D[7]
AR1002
33
1/16W
33
1/16W
T2_S_BR
R1002
51
S
C1000
0.1uF
16V
R1021
3.3K
S
C1007
10uF
6.3V
S
R1011
2.2K
S
+3.3V_TU
C1002
1000pF
50V
S
C1001
0.1uF
16V
R1004
22 S
FE_TS_CLK
I2C_SCL6
+3.3V_TU
C1010
0.1uF
16V
S
I2C_SDA6
C1005
0.1uF
16V
S
TU_SIF
R1020
3.3K
S
LNB_TX
+1.8V_TU
+1.25V_TU
C1003
10uF
6.3V
I2C_SDA4
R1006
4.7K
FE_TS_SYNC
TU_CVBS
S2_RESET
I2C_SCL4
DIF_P
AR1001
33
1/16W
33
1/16W
T2_S_BR
FE_TS_D[0-7]
C1008
10uF
6.3V
S
C1009
33pF
50V
S
FE_TS_VAL
C1004
0.1uF
16V
S
+3.3V_TU
IF_AGC
+3.3V_TU
DIF_N
D1000
3.0SMCJ20A(suzhougrande)
S
R1005
22 S
LNB_OUT
R1013
82
C1014
10uF
6.3V
C1013
0.1uF
16V
R1000
0
T2_BR
R1003
0
T2_BR
+1.25V_TU
RF_SW_CTL
R1027
2.2K
2.2K
1W
S
ATV_OUT
Q1002
MMBT3906(NXP)
E
B
C
Q1000
MMBT3906(NXP)
EU
E
B
C
Q1001
MMBT3906(NXP)
E
B
C
R1015
22
R1016
22
C1017
10pF
50V
10pF
50V
OPT
R1007
10K
NO_T2_BR
C1006
0.047uF
25V
NO_T2_BR
TU1001
TDSS-G101D
TDSS-G101D
DVB_T/C
5
+3.3V
11
DIF[N]
2
RESET
10
DIF[P]
4
SDA
1
NC
9
IF_AGC
8
CVBS
3
SCL
7
+1.8V
6
SIF
12
SHIELD
TU1001-*1
TDSS-H101F
ATSC_NT
5
+B1[3.3V]
11
DIF[N]
2
RESET
10
DIF[P]
4
SDA
1
NC
9
IF_AGC
8
CVBS
3
SCL
7
+B2[1.8V]
6
SIF
12
SHIELD
TU1002-*1
TDSN_B001F
TDSN_B001F
ATSC_BR
1
RF_S/W_CTL
2
RESET
3
SCL
4
SDA
5
+B1[3.3V]
6
SIF
7
+B2[1.8V]
8
CVBS
9
NC_1
10
NC_2
11
NC_3
12
+B3[3.3V]
13
+B4[1.23V]
14
NC_4
15
GND
16
ERROR
17
SYNC
18
VALID
19
MCLK
20
D0
21
D1
22
D2
23
D3
24
D4
25
D5
26
D6
27
D7
28
SHIELD
TU1000
TDSQ-G001D
S
1
NC_1
2
RESET
3
SCL
4
SDA
5
+B1[3.3V]
6
SIF
7
+B2[1.8V]
8
CVBS
9
T/C_IF_AGC
10
T/C_DIF[P]
11
T/C_DIF[N]
12
NC_2
13
NC_3
14
NC_4
15
GND_1
16
ERROR
17
SYNC
18
VALID
19
MCLK
20
D0
21
D1
22
D2
23
D3
24
D4
25
D5
26
D6
27
D7
28
GND_2
29
GND_3
30
+B3[1.23V]
31
S2_RESET
38
SHIELD
32
+B4[3.3V]
33
S2_F22_OUTPUT
34
S2_SCL
35
S2_SDA
36
LNB
37
GND_4
TU1002
TDSN-G301D
TDSN-G301D
DVB_T2
1
NC_1
2
RESET
3
SCL
4
SDA
5
+B1[3.3V]
6
SIF
7
+B2[1.8V]
8
CVBS
9
+B3[2.5V]
10
NC_2
11
NC_3
12
+B4[3.3V]
13
+B5[1.23V]
14
NC_4
15
GND
16
ERROR
17
SYNC
18
VALID
19
MCLK
20
D0
21
D1
22
D2
23
D3
24
D4
25
D5
26
D6
27
D7
28
SHIELD
DAC_3V3
L1000
BLM18PG121SN1D
+3.3V_TU_BUF
C1018
0.1uF
16V
+3.3V_TU_BUF
+3.3V_TU_BUF
+3.3V_TU_BUF
R1014
200
1/10W
R1028
200
1/10W
EU
R1029
200
1/10W
EU
R1017
200
1/10W
R1009
1K
BR_CO
R1012
470
1/10W
1/10W
C1021
0.1uF
16V
NO_EU
C1019
0.1uF
16V
C1012
68pF
50V
68pF
50V
C1011
68pF
50V
68pF
50V
C1020
0.01uF
50V
0.01uF
50V
TU1003
TDSH-T101F
TDSH-T101F
ATSC_CO
5
+B1[3.3V]
11
DIF[N]
2
RESET
10
DIF[P]
4
SDA
1
RF_S/W_CTL
9
IF_AGC
8
CVBS
3
SCL
7
+B2[1.8V]
6
SIF
12
SHIELD
C1022
10uF
6.3V
OPT
R1030
4.7K
Q1003
MMBT3904(NXP)
E
B
C
R1001
10K
10K
TU_RST
R1008
0
+3.3V_TU_BUF
AR1000
33
1/16W
33
1/16W
T2_S_BR
close to TUNER
Close to the tuner
TUNER [DVB-T/C/S2, TDSQ-G001D, H/NIM,F/NIM]
[DVB-T/C, TDSS-G101D, H/NIM]
[DVB-T2/C, TDSN-G301D, F/NIM]
[ATSC-KR/US, TDSS-H101F, H/NIM]
[ATSC-BR, TDSN-B001F, F/NIM]
[ATSC-CO, TDSH-T101F, H/NIM]
[DVB-T/C, TDSS-G101D, H/NIM]
[DVB-T2/C, TDSN-G301D, F/NIM]
[ATSC-KR/US, TDSS-H101F, H/NIM]
[ATSC-BR, TDSN-B001F, F/NIM]
[ATSC-CO, TDSH-T101F, H/NIM]
Surge protectioin
Close to Tuner #38 pin
CLOSED TO TUNER
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.
C1135
0.01uF
50V
0.01uF
50V
S
C1141
0.1uF
50V
S
C1145
10uF
16V
16V
S
IC1106
TPS54231D
S
3
EN
2
VIN
4
SS
1
BOOT
5
VSENSE
6
COMP
7
GND
8
PH
R1139
6.8K
1%
S
D1100
40V
SMAB34
S
R1135
51K
51K
S
R1127
16K
S
C1144
470pF
50V
470pF
50V
S
+5V_ST
L1106
22.0uH
22.0uH
S
EAP61606601
+3.3V_ST
IC1100
AP2121N-3.3TRE1
1
GND
2
VOUT
3
VIN
C1101
0.1uF
16V
P_+17V
R1128
3.6K
S
+12V_LNB
C1131
10uF
25V
10uF
25V
S
R1138
120K
1%
S
C1147
15pF
50V
15pF
50V
S
C1146
10uF
16V
16V
S
C1140
0.01uF
50V
0.01uF
50V
S
C1112
0.1uF
50V
C1103
0.1uF
16V
C1102
0.1uF
16V
AC_DET
P_+5V
C1109
10uF
10V
L1101
CIS21J121
C1110
10uF
10V
+5V_ST
P1100
SMAW200-H18S1
14
NC
9
NC
4
GND
18
GND
13
5V_ST
8
PSU_ERR
3
GND
17
MOD_ON
12
GND
7
NC
2
17V
16
AC_DET
11
GND
6
5V
1
17V
15
RL_ON
10
GND
5
5V
19
P_+17V
L1100
CIS21J121
MOD_ON
C1113
0.1uF
16V
PSU_ERR_DET
RL_ON
C1152
22uF
6.3V
22uF
6.3V
C1118
1uF
10V
1uF
10V
C1151
22uF
6.3V
22uF
6.3V
C1106
10uF
25V
10uF
25V
P_+17V
R1104 10K
C1104
10uF
25V
10uF
25V
IC1101
TPS54327DDAR
3
VREG5
2
VFB
4
SS
1
EN
5
GND
6
SW
7
VBST
8
VIN
9
[EP]GND
+3.3V_MULTI
C1149
3300pF
50V
3300pF
50V
C1107
22pF
50V
C1117
10uF
6.3V
+1.8V_TU
R1113
1
T2_S_BR
C1116
10uF
6.3V
T2_S_BR
C1120
10uF
6.3V
+3.3V_MULTI
IC1104
AZ1117BH-ADJTRE1
2
OUTPUT
3
INPUT
1
ADJ/GND
+1.25V_TU
C1119
10uF
6.3V
T2_S_BR
R1114
1
+3.3V_MULTI
+3.3V_MULTI
C1148
0.1uF
16V
+3.3V_TU
C1126
22uF
6.3V
22uF
6.3V
C1123
3300pF
50V
3300pF
50V
C1121
22pF
50V
IC1105
TPS54327DDAR
3
VREG5
2
VFB
4
SS
1
EN
5
GND
6
SW
7
VBST
8
VIN
9
[EP]GND
P_+17V
C1122
1uF
10V
1uF
10V
R1117 10K
C1125
22uF
6.3V
22uF
6.3V
R1106
18K
1%
+1.5V_DDR
C1124
0.1uF
16V
C1150
0.1uF
16V
L1107
2.2uH
NR5040T2R2N
L1103
2.2uH
NR5040T2R2N
IC1103
AZ1117BH-ADJTRE1
T2_S_BR
OUTPUT
INPUT
ADJ/GND
C1115
0.1uF
16V
OPT
L1104
2uH
IC1102
AOZ1038PI
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
NC_1
8
NC_2
9
[EP]LX
R1118
10K
OPT
+5V_ST
POWER_ON1
+1.2V_MTK_CORE
C1114
10uF
25V
10uF
25V
C1111
10uF
25V
10uF
25V
POWER_ON2
R1145
0
0
OPT
POWER_ON3
R1116
0
0
OPT
R1108
3.3K
C1127
4700pF
50V
C1100
10uF
10V
C1108
10uF
10V
R1107
0
0
OPT
POWER_ON4
C1138
22uF
6.3V
22uF
6.3V
R1122
10K
1%
R1119
82
1%
R1131
180
5%
L1102
CIS21J121
C1132
10uF
6.3V
C1130
10uF
6.3V
C1133
10uF
6.3V
C1128
10uF
6.3V
C1105
1uF
10V
C1129
100uF
16V
R1140
1.6K
1%
S
R1115
51K
1%
R1146
27K
1%
R1102
33K
1%
R1103
10K
1%
R1120
10K
L1108
BLM18PG121SN1D
L1109
BLM18PG121SN1D
L1110
BLM18PG121SN1D
T2_S_BR
L1111
BLM18PG121SN1D
L1112
BLM18PG121SN1D
L1113
BLM18PG121SN1D
S
R1112
240
T2_S_BR
R1111
1
T2_S_BR
R1121
5.6K
1%
*NOTE 13
R1
-->3.12V
17V->12V
+3.3V_Stand_By
fr. PWR SUPPLY UNIT
R2
Max 1.3A
Vout=0.8*(1+R1/R2)
2A
R1
3A
Vout=0.765*(1+R1/R2)
R2
R1
+1.25V_TU
*V0=1.25(1+1/240)
1.250000=1.25*(1)
1.250000=1.25*(1)
R2
*V0=1.25(1+82/180)
=1.8194
=1.8194
+1.8V_TU
R2
3A
Vout=0.765*(1+R1/R2)
R1
6A
Vout=Vref*(1+R1/R2)|Vref=0.8
R2
Switching freq: 555K
Placed on SMD-TOP
R1
+1.2V_CORE_MT5369
Click on the first or last page to see other 50PM6900-UD (CHASSIS:PU22B) service manuals if exist.