DOWNLOAD LG 50PT250B-SG (CHASSIS:PB12K) Service Manual ↓ Size: 7.31 MB | Pages: 63 in PDF or view online for FREE

Model
50PT250B-SG (CHASSIS:PB12K)
Pages
63
Size
7.31 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
50pt250b-sg-chassis-pb12k.pdf
Date
PREV: LG 50PT250B-SA (CHASSIS:PB11K) Service Manual

LG 50PT250B-SG (CHASSIS:PB12K) 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.
TU2101
TDTR-T036F
14
+B3[3.3V]
13
+B2[1.2V]
5
NC_2
12
GND
11
VIDEO
2
BST_CTL
10
NC_4
4
NC_1[RF_AGC]
1
RF_S/W_CTL
17
DIF_1[N]
9
SIF
8
NC_3
3
+B1[5V]
16
IF/AGC
7
SDAT
6
SCLT
15
RESET
18
DIF_2[P]
19
SHIELD
RF_SWITCH_CTL
Q2102
MMBT3906(NXP) 
E
B
C
C2151
0.1uF
16V
R2137
2.2K
FE_BOOSTER_CTL
C2138
1uF
C2125
0.1uF
C2001
1200pF
50V
+3.3V_TU
FE_TS_CLK
C2104
0.1uF
R2140
22
C2000
100uF
16V
C2122
0.1uF
C2120
0.1uF
C2114
0.1uF
16V
C2131
47pF
50V
C2202
0.01uF
25V
C2139
1uF
C2142
0.01uF
+3.3V_TU
R2129
100
+3.3V_TU
R2126
200
+3.3V_DE
+5V_TU
R2132 2.2K
TUNER_IF_P
R2118
100
R2115
3K
R2124
200
C2147
0.1uF
C2106
1200pF
50V
R2133 2.2K
C2201
0.1uF
16V
FE_TS_VAL_ERR
X2101
25MHz
C2117
0.1uF
16V
TU_SIF
C2148
0.1uF
Q2201
MMBT3906(NXP) 
E
B
C
C2111
4.7uF
10V
C2137
30pF
50V
Q2101
MMBT3906(NXP) 
E
B
C
TUNER_RESET
AMP_DEMOD_SCL
R2114
3K
+5V_TU
TU_CVBS
C2136
0.1uF
16V
TUNER_IF_N
R2122
470
C2123
0.1uF
R2142
22
TUNER_IF_N
TU_SCL
C2121 0.1uF
C2150
0.1uF
R2135
10K
R2148
100
R2117
1K
L700
C2129
0.1uF
Q2202
2SC3875S(ALY)
E
B
C
R2144
2.7K
C2144
0.1uF
R2145
22
C2108
4.7uF
10V
R2202
10K
C2103
4.7uF
10V
C2132
0.1uF
16V
R2119
100K
+1.2V_DE
C2101
0.1uF
16V
R2147
100
AMP_DEMOD_SDA
+3.3V_DE
C2126
0.1uF
R2146
22
C2110
0.1uF
C2124
0.1uF
FE_TS_SYN
C2140
0.1uF
16V
R2123
82
C2133
0.1uF
16V
C2135
0.1uF
TU_SDA
R2120
4.7K
R2130
100
C2146
0.1uF
16V
IC2102
MN884433
1
VSS_1
2
AVDD_S
3
AII_S
4
AIQ_S
5
AVSS_S
6
VRT_S
7
VRB_S
8
TCPO_S
9
VDDL_1
10
MSCL_S
11
MSDA_S
12
VSS_2
13
VSSH
14
PSEL
15
ZSEL
16
VDDL_2
17
ACKI
18
TCPO_T
19
IR_T
20
VRT_T
21
VRB_T
22
AVDD_T
23
AIN_T
24
AIP_T
25
AVSS_T
26
VSS_3
27
MSCL_T
28
MSDA_T
29
VDDH_1
30
GPO1
31
AGCI_T
32
AGCR_T
33
GPO0
34
VDDL_3
35
VSS_4
36
XO
37
XI
38
VDDH_2
39
GPI1
40
GPI0
41
TEST4
42
SHVPP
43
SHVDDH
44
NC_1
45
VSS_5
46
VDDL_4
47
TCK
48
TDI
49
NRST
50
TEST3
51
VSS_6
52
VDDL_5
53
TRST
54
TMS
55
CSEL0
56
CSEL1
57
TDO
58
SYNCA
59
ERRA
60
SYNCB
61
ERRB
62
VSS_7
63
VDDL_6
64
SADR_T
65
NC_2
66
SADR_S
67
HDVDDL0
68
VSS_8
69
SDA
70
SCL
71
VDDH_3
72
SADR
73
INTA
74
INTB
75
VSS_9
76
TEST1
77
TEST2
78
SCKA
79
GPI2
80
SDOA
81
PCKA
82
DENA
83
VDDH_4
84
VSS_10
85
HDVPP
86
RON
87
NC_3
88
HDVDDH
89
NC_4
90
HDVDDL1
91
VSS_11
92
VDDL_7
93
SCKB
94
TEST0
95
SDOB
96
PCKB
97
DENB
98
GPO2
99
VDDH_5
100
AGC_S
+1.2V_DE
R2143
22
C2113
0.1uF
C2141
30pF
50V
C2130
47pF
50V
FE_TS_SERIAL
+5V_TU
R2139
1M
C2002
1200pF
50V
C2116
0.1uF
16V
TUNER_IF_P
R2203
10K
R2201
2.2K
R2121
0
READY
+5V_TU
R2141
22
ISDB_IF_AGC
R2138
2.2K
C2145
0.1uF
16V
C2115
100pF
50V
C2143
0.1uF
16V
DEMOD_RESET
ISDB_IF_AGC
C2149
0.1uF
R2131
10K
1%
AUDIO AMP
GP4 LM1
20110531
7
7
Close to the tuner
Close to R622,R623
BRAZIL DEMODULATOR
Close to the tuner
BRAZIL TUNER
CH_6
Close to the tuner
LM1 Replace Training Manual
LM1 Replace Training Manual
Contents
- Block Diagram
- System Design
- Trouble Shooting Guide
Block Diagram – Overview()
S7LR
IR
RS-232C
UART
UART
X-tal
(24MHz)
NAND
Flash
Serial Flash
DDR3
COMP1
COMP2
Y/Cb/Cr
Y/Cb/Cr
R/G/B 
RGB-PC
Rear AV
CVBS
Side AV
CVBS
AV1,2 L/R
COMP 1,2 L/R
L/R
L/R
HDMI 1
HDMI 2
HDMI 3
TMDS/DDC
TMDS/DDC
Video 
Front 
End
Audio
Front 
End
HDMI 
RX
LVDS out
HD
(1024*768)
HD/SD
Video
Encoder
STA368
(Digital AMP)
I2S
MCLK
Audio
DSP
SPDIF Out
UART
RX/TX
DDC
Side USB
USB2.0
TMDS/DDC
RGB-PC L/R
CVBS
DEMOD
DEMOD
CVBS(ATV)
Serial_TS(SBTVD)
IF
SIF
Cab
le
ISDB-T/
PAL/NTSC
IF(ATSC)
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