LG 50PX950-UA / 50PX950-UF (CHASSIS:PU02B) 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.
POWER
C444
100uF
16V
16V
L407
BLM18SG700TN1D
C447
0.1uF
50V
0.1uF
50V
C450
22uF
R439
110
1/10W
1%
R426
910
1%
R434
0
1/10W
5%
R427
66.5
1%
C437
22uF
16V
22uF
16V
+5V
R440
0
0
1/10W
5%
5%
IC406
AZ1117H-ADJTRE1(EH11A)
2
OUTPUT
3
INPUT
1
ADJ/GND
R430
1K
1K
1%
IC403
AZ1085S-ADJTR/E1
1
ADJ/GND
2
OUTPUT
3
INPUT
R441
330
330
1/10W
1%
1%
C465
100uF
16V
16V
C435
0.1uF
50V
0.1uF
50V
ERROR_DET
C403
0.1uF
16V
L402
MLB-201209-0120P-N2
0LCML00003B
C422
100uF
16V
C417
0.1uF
50V
R415
100
C401
10uF
6.3V
OPT
R413
10K
OPT
AC_DET
R411
22
RL_ON
C407
0.1uF
16V
C416
0.1uF
16V
5V_ON
R405
100
P_17V
R400
100
C418
0.1uF
16V
16V
+3.3V
+5V
ST_5V
C409
0.1uF
16V
C423
10uF
6.3V
OPT
L405
CB4532UK121E
EAM38058401
L403
CB4532UK121E
EAM38058401
C420
10uF
10V
C405
10uF
10V
C443
47uF
16V
16V
L413
BLM18SG700TN1D
GND
GND
C406
47uF
16V
R401
0
+3.3V_ST
C446
0.1uF
16V
0.1uF
16V
GND
+3.3V_NEC_ST
C414
0.1uF
16V
ST_5V
IC400
AP2121N-3.3TRE1
1
GND
2
VOUT
3
VIN
D1.8V
1.8V_1.2V_EN
+5V_TU
+3.3V
L408
3.6uH
L411
UBW2012-121F
C439
0.1uF
R442
47
R429
39K
1%
IC402
MP8706EN-C247-LF-Z
3
SW_2
2
SW_1
4
BST
1
IN
5
EN/SYNC
6
FB
7
VCC
8
GND
C429
47uF
16V
47uF
16V
C434
0.1uF
0.1uF
R433
0
+3.3V_EN
007:AB20
C454
100uF
16V
D3.3V
A2.5V
C408
100uF
16V
C419
68uF
35V
R431
13K
13K
1/8W
1%
1%
R428
1.2K
1%
C445
22uF
10V
22uF
10V
C452
0.1uF
16V
C410
22uF
10V
22uF
10V
C411
0.1uF
16V
+5V
C431
22uF
10V
22uF
10V
D1.2V
A1.2V
C460
0.1uF
0.1uF
R443
47
C461
22uF
10V
22uF
10V
R446
39K
1%
C412
0.1uF
IC404
MP8706EN-C247-LF-Z
3
SW_2
2
SW_1
4
BST
1
IN
5
EN/SYNC
6
FB
7
VCC
8
GND
R447
1.2K
1%
L409
3.6uH
C463
0.1uF
16V
R444
0
P_17V
RL_ON
C455
10uF
25V
10uF
25V
R445
5.1K
5.1K
R437
0
0
C440
0.1uF
0.1uF
10
R416
C451
22uF
16V
16V
R412
0
C442
22uF
22uF
C456
22uF
16V
16V
C449
22uF
22uF
16V
C438
0.1uF
0.1uF
C428
0.1uF
0.1uF
R414
470K
1%
C457
0.1uF
16V
0.1uF
16V
L406
2uH
C436
0.1uF
0.1uF
R410
0
C430
22uF
16V
16V
R409
100K
C441
1uF
10V
1.8V_1.2V_EN
P400
SMAW200-H18S1
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
15
10
5
19
R436
820K
1%
0.1uF
C433
C432
22uF
22uF
10V
L404
3.6uH
NR8040T3R6N
R406
10K
C425
100pF
50V
OPT
L414
CIC21J501NE
R403
10K
10K
1/10W
1%
C402
22uF
22uF
10V
R404
6.8K
R402
10.5K
1/10W
1%
C404
0.1uF
16V
C421
0.1uF
16V
0.1uF
16V
C426
0.1uF
0.1uF
16V
L415
MLB-201209-0120P-N2
L412
MLB-201209-0120P-N2
ST_5V
ST_5V
JP406
IC405
MP2208DL-LF-Z
3
PGND_1
2
SS
4
SW_1
1
AGND
6
NC
5
IN_1
7
BS
8
VCC
9
POK
10
IN_2
11
SW_2
12
PGND_2
13
EN/SYNC
14
FB
15
EP
IC401
MP2108DQ
3
LX
2
VIN
4
PGND
1
BST
5
SGND
6
SS
7
FB
8
COMP
9
VREF
10
RUN
C424
3300pF
50V
4 14
POWER
EAX61557901
FROM POWER B/D
R1
3A
V0 = 1.25(1+R2/R1)
BCM3549 A2.5V
R2
TUNER & Demod
POWER Wafer 18P
3.3V_ST & NEC
DDR 1.8V
BCM core 1.2V volt
+7V
R2
R1
BCM3549 A3.3V
Vout=0.8*(1+R1/R2)
Vout=0.8*(1+R1/R2)
R2
R1
Vout=0.8*(1+R1/R2)
R1
R2
2.5A
70mA
68mA
Vout=0.9*(1+R1/R2)
3A
R1
R2
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/RS-232C/IR
SIGN11547
+3.3V_ST
KEY1
R704
0
LED_RED
R790
4.7K
OPT
+3.3V_ST
R776
0
+3.3V_ST
IR
R798
0
RESETb_BCM3549
009:P17;007:U20
IR_PASS
C703
220pF
50V
OPT
Q701
2SC3052
US
E
B
C
+3.3V_ST
+3.3V_ST
R782
4.7K
OPT
SUB_SDA
D702
Q702
2SC3052
E
B
C
C735
0.1uF
16V
0.1uF
16V
+5V
R705
4.7K
L707
MLB-201209-0120P-N2
D3.3V
+5V
LED_BREATHING
NEC_TXD
007:Y17
R793
4.7K
OPT
R756
0
R773
2.7K
2.7K
C711
0.1uF
50V
SCL2_3.3V
R789
10K
C733
10pF
10pF
R779
47K
R722
100
R772
47K
R7990
0
OPT
C730
10pF
R788
0
0
D3.3V
SUB_SCL
C727
10pF
R787
10K
R775
0
R794
4.7K
OPT
D700
30V
ADUC30S03010L_AMODIODE
OPT
ST_5V
SW700
SKHMPWE010
1
2
4
3
5
BCM_RXD
005:AD16
R768
0
Q703
2SC3052
E
B
C
LED_WHITE
SDA2_3.3V
KEY2
C701
0.1uF
50V
0.1uF
50V
+3.3V
C731
0.1uF
16V
0.1uF
16V
NEC_RXD
007:Y17
L708
MLB-201209-0120P-N2
R777
0
OPT
C709
0.1uF
50V
0.1uF
50V
BCM_TXD
005:AD16
C732
10pF
P703
12507WR-12L
1
IR
2
GND
3
KEY1
4
KEY2
5
LED-RED
6
GND
7
SCL
8
SDA
9
GND
10
3.3V_ST
11
3.3V_MULTI
12
LED-WHITE
13
GND
RS232C_RXD
C706
0.1uF
50V
0.1uF
50V
RS232C_RXD
L706
MLB-201209-0120P-N2
P701
SPG09-DB-009
1
2
3
4
5
6
7
8
9
10
C702
220pF
50V
OPT
C725
10pF
OPT
+3.3V
R796
22
22
RESET_OUTB
R781
4.7K
OPT
L704
MLB-201209-0120P-N2
R769
100K
100K
+3.3V_ST
R791
4.7K
C715
0.1uF
50V
0.1uF
50V
RS232C_TXD
C726
10pF
OPT
+5V
+3.3V
R795
22
22
IC702
MAX3232CDR
3
C
1
-
2
V
+
4
C
2
+
1
C
1
+
6
V
-
5
C
2
-
7
D
O
U
T
2
8
R
I
N
2
9
R
O
U
T
2
1
0
D
I
N
2
1
1
D
I
N
1
1
2
R
O
U
T
1
1
3
R
I
N
1
1
4
D
O
U
T
1
1
5
G
N
D
1
6
V
C
C
IC707
KIA7029AF
2
G
3
O
1
I
JTAG_RESETb
009:Y26
L705
MLB-201209-0120P-N2
IR_OUT
R778
10K
10K
C729
10pF
L703
BLM18PG121SN1D
R783
330
330
D701
30V
ADUC30S03010L_AMODIODE
OPT
R792
4.7K
R785
910
C721
0.1uF
16V
C724
22uF
16V
16V
R780
47K
R724
100
IR_OUT
R774
4.7K
OPT
IC704
MC14053BDR2G
0ISTL00024A
3
Z1
2
Y0
4
Z
1
Y1
6
INH
5
Z0
7
VEE
8
VSS
9
C
10
B
11
A
12
X0
13
X1
14
X
15
Y
16
VDD
R708
4.7K
R771
22
RS232C_TXD
007:B7
L709
MLB-201209-0120P-N2
R797
22
22
C734
10pF
C723
0.1uF
0.1uF
R799
10K
C728
0.1uF
16V
AMP_RESET_N
R767
10K
LED_NORMAL
R764
10K
OPT
+3.3V_NEC_ST
MODEL1_OPT_2
MODEL1_OPT_3
MODEL1_OPT_1
R758
100
R759
10K
LED_NORMAL
R760
10K
CENTER_LED
R757
100
R766
10K
CENTER_LED
MODEL1_OPT_0
R761
10K
OPT
R763
10K
OPT
R762
10K
OPT
DISP_EN
NEC_ISP_RXD
OCD1A
P700
12505WS-12A00
1
2
3
4
5
6
7
8
9
10
11
12
13
WIRELESS_PWR_EN
NEC_RXD
C704
0.1uF
OPT
R718
4.7K
KEY2
C700
0.1uF
16V
0.1uF
16V
R713 22
MODEL1_OPT_0
FLMD0
007:Q22;007:AB21
R725
0
R
7
1
2
4
.
7
K
OPT
5V_ON
KEY1
+3.3V_NEC_ST
R728
0
LED_WHITE
R734
22
R733
22
R746
22
R702
22
X700
10MHz
C713
0.1uF
16V
C707
12pF
50V
R741 0 OPT
R721
0
R750
0
R714
22
L700
R707
0
MODEL1_OPT_2
RESET_NEC
EDID_WP
R
7
0
9
4
.
7
K
OPT
R726
0
SDA1_3.3V
RESET_NEC
R719
0
OCD1B
+3.3V_EN
+3.3V_NEC_ST
C714
100uF
16V
ERROR_DET
R727
100K
1/10W
5%
OCD1A
WIRELESS_DETECT
C708
12pF
50V
1.8V_1.2V_EN
R710
22
OPT
R701
10K
NEC_ISP_TXD
HDMI_CEC
LED_BREATHING
R716 0
NEC_ISP_RXD
+3.3V_NEC_ST
NEC_TXD
NEC_ISP_TXD
R735
100K
MODEL1_OPT_3
LED_RED
R
7
2
9
2
2
SCL1_3.3V
R723
100
AC_DET
R739
3K
R743
0
+3.3V_NEC_ST
R
7
3
0
2
2
R744
0
R
7
0
0
4
7
K
1/10W
5%
FLMD0
OCD1B
FLMD0
X701
32.768KHz
TXC
+3.3V_NEC_ST
R742
22
R736
4.7K
OPT
RESETb_BCM3549
R715
0
R751
22
+3.3V_NEC_ST
R717
4.7K
MODEL1_OPT_1
R737
4.7K
OPT
R703
22
RL_ON
IR_MICOM
R732
0
R745
0
C705
0.1uF
R748
0
ST_5V
SUB_SCL
SUB_SDA
R784
0
OPT
R786
0
OPT
REMOTE_SW_CTRL
R770
0
R749
10K
+3.3V
R747
0
R740
100
P702
12507WR-03L
CENTER_LED
1
2
3
4
L701
MLB-201209-0120P-N2
OPT
+3.3V
SUB_SCL
SUB_SDA
R720
0
R755
0
R753
47K US
R752
47K
US
C710
22pF
50V
TXC
C712
27pF
50V
TXC
R738
120K
120K
C717
0.1uF
16V
0.1uF
16V
OPT
R731
4.7M
R711
10K
NEC_ISP_TXD
OCD1B
R754
10K
R765
10K
R7989
10K
OCD1A
NEC_ISP_RXD
+3.3V_NEC_ST
FLASH_WP
X701-*1
32.768KHz
KDS
C712-*1
15pF
50V
15pF
50V
KDS
C710-*1
15pF
50V
15pF
50V
KDS
IC701
UPD78F0513AGA-GAM-AX
1
P60/SCL0
2
P61/SDA0
3
P62/EXSCL0
4
P63
5
P33/TI51/TO51/INTP4
6
P75
7
P74
8
P73/KR3
9
P72/KR2
10
P71/KR1
11
P70/KR0
12
P32/INTP3/OCD1B
13
P31/INTP2/OCD1A
14
P30/INTP1
15
P17/TI50/TO50
16
P16/TOH1/INTP5
17
P15/TOH0
18
P14/RXD6
19
P13/TXD6
20
P12/SO10
21
P11/SL10/RXD0
22
P10/SCK10/TXD0
23
AVREF
24
AVSS
25
ANI7/P27
26
ANI6/P26
27
ANI5/P25
28
ANI4/P24
29
ANI3/P23
30
ANI2/P22
31
ANI1/P21
32
P20/ANI0
33
P130
34
P01/TI010/TO00
35
P00/TI000
36
P140/PCL/INTP6
37
P120/INTP0/EXLVI
38
P41
39
P40
40
RESET
41
P124/XT2/EXCLKS
42
P123/XT1
43
FLMD0
44
P122/X2/EXCLK/OCD0B
45
P121/X1/OCD0A
46
REGC
47
VSS
48
VDD
IC705
M24M01-HRMN6TP
3
E2
2
E1
4
VSS
1
NC
5
SDA
6
SCL
7
WP
8
VCC
IC700
M24C16-WMN6T
0IMMRSG036B
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
P704
12507WR-04L
1
2
3
4
5
L710
MLB-201209-0120P-N2
+5V
D703
5.5V
3D_SYNC_OUT
R706
0
0
C736
27pF
50V
50V
OPT
C722
10uF
10V
10uF
10V
7 14
MICOM/RS-232C/IR
EAX61557901
NVRAM 1Mbits
LOW
OUTPUT
RS232C
I2C : A0
SUB Board I/F
$0.179
X1 Y1
RS-232C S/W
FOR PK90
HIGH
RESET
X0 Y0
WIRELESS
A/B
$0.59
1
ADD CENTER_LED
RED & WHITE
0
0
0
MICOM MODEL OPTION
1
RED ONLY
MODEL_OPT_0
0
MODEL_OPT_3
NEC SUB MICOM
HALT
MODE
MODE
ISP Port for SUB MICOM
LCD-RL_ON
CHECK WAKE UP BY KEY !!
LCD-IR
CHEC‘K !! STANDBY STAUTE
KDS Multi Option
3D SYNC_IR EMITTER
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