DOWNLOAD LG 42PT350B-SG (CHASSIS:PB12K) Service Manual ↓ Size: 9.09 MB | Pages: 63 in PDF or view online for FREE

Model
42PT350B-SG (CHASSIS:PB12K)
Pages
63
Size
9.09 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
42pt350b-sg-chassis-pb12k.pdf
Date
PREV: LG 42PT350B-SA (CHASSIS:PB11K) Service Manual

LG 42PT350B-SG (CHASSIS:PB12K) Service Manual ▷ View online

- 13 -
BLOCK DIAGRAM
- 14 -
EXPLODED VIEW
900
910
203
590
204
601
207
520
400
200
240
580
301
305
120
300
206
202
205
302
303
304
501
602
201
570
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by       in the Schematic Diagram and EXPLODED VIEW. 
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards. 
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
A10
A9
LV1
A12
A21
A2
A4
U
S
B
 
D
O
W
N
 
S
T
R
E
A
M
Fiber Optic
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.
R228
10K
5V_HDMI_3
+5V
R208
10K
C245
0.1uF
16V
R227
10K
R249 1.8K
+5V_ST
D200
READY
DDC_SDA_1
CK-_HDMI3
R223
12K
D0+_HDMI2
D2-_HDMI2
D2+_HDMI3
D1+_HDMI2
R226 1.8K
R204
3.3K
+5V
R1201
10K
D212
READY
C240
27pF
50V
HDMI_ARC
R240
75
R274 0
READY
DSUB_R+
JK207
PPJ235-01
4A
[YL]O-SPRING
5A
[YL]E-LUG
3A
[YL]CONTACT
4B
[WH]O-SPRING
3C
[RD]CONTACT
4C
[RD]O-SPRING
5C
[RD]E-LUG
D207
READY
R278
33
USB1_CTL
D218
BAT54_SUZHO
READY
30V
R212
10K
+5V
R6005
10K
1/16W
5%
D214
30V
READY
5V_HDMI_2
C239
1000pF
50V
R290
10K
D1-_HDMI2
C237
0.1uF
16V
10K
5V_HDMI_2
C222
0.1uF
16V
R221
0
READY
GND
CK+_HDMI1
Q200
2SC3875S(ALY)
E
B
C
JP207
SIDE_USB_DP
R200 1K
JK209
1
2
3
4
5
R1200
75
5V_DET_HDMI_1
R291
10K
D2+_HDMI1
PM_RXD
BSS83
Q203
READY
S
B
D
G
CK-_HDMI2
R267
10K
R205 33
JK202
EAG62611201
HDMI Side
14
13
5
D1_GND
20
BODY_SHIELD
12
11
2
D2_GND
19
18
10
CK+
4
D1+
1
D2+
17
9
D0-
8
D0_GND
3
D2-
16
7
D0+
6
D1-
15
JP201
Q201
2SC3875S(ALY)
E
B
C
PC_R_IN
JP204
C235
0.1uF
16V
C236
10pF
50V
R277
10K
READY
D201
ENKMC2838-T112
A1
C
A2
R220
56K
READY
R296
100
PC_SER_DATA
J
P
2
0
2
JK200
EAG59023302
HDMI1
14
13
5
D1_GND
20
SHIELD
12
11
2
D2_GND
19
18
10
CK+
4
D1+
1
D2+
17
9
D0-
8
D0_GND
3
D2-
16
7
D0+
6
D1-
15
D0-_HDMI3
PC_SER_CLK
5V_DET_HDMI_2
D1+_HDMI1
D1-_HDMI3
CEC_REMOTE
R1205
12K
C209
10pF
50V
5V_HDMI_2
DDC_SCL_2
DDC_SCL_1
R6004
10K
1/16W
5%
DDC_SCL_3
D0-_HDMI2
R299
470K
R253
33
R1202
10K
5V_HDMI_3
R288
100
RGB_DDC_SCL
R213
470K
C243
0.1uF
16V
D202
ENKMC2838-T112
A1
C
A2
D219
READY
R1204
12K
SIDEAV_L_IN
DSUB_G+
D1+_HDMI3
R203
10K
R211
10
R216
10K
J
P
2
0
5
DSUB_DET
CEC_REMOTE
R201 1.8K
R293
100
READY
R231 33
PC_SER_CLK
JK201
EAG59023301
HDMI2
14
13
5
D1_GND
20
SHIELD
12
11
2
D2_GND
19
18
10
CK+
4
D1+
1
D2+
17
9
D0-
8
D0_GND
3
D2-
16
7
D0+
6
D1-
15
SIDEAV_R_IN
R210
10
R239
75
R217
10K
+3.3V_ST
R292
1K
READY
5V_HDMI_3
SPDIF_OUT
C208
0.1uF
16V
R289
100
PC_SER_DATA
R214
470K
5V_HDMI_1
10K
R222
12K
DDC_SDA_3
IC203
MAX3232CDR
3
C1-
2
V+
4
C2+
1
C1+
6
V-
5
C2-
7
DOUT2
8
RIN2
9
ROUT2
10
DIN2
11
DIN1
12
ROUT1
13
RIN1
14
DOUT1
15
GND
16
VCC
R1203
1K
R248 1K
5V_DET_HDMI_3
S7_TXD
+5V
R295
0
CK-_HDMI1
CEC_REMOTE
C223
22uF
16V
READY
5V_HDMI_1
CK+_HDMI3
D2-_HDMI1
PM_TXD
10K
D0-_HDMI1
D0+_HDMI3
CEC_REMOTE
SIDEAV_CVBS_IN
HPD1
C205
1000pF
50V
R236
10K
5V_HDMI_1
+3.3V_ST
R294
10K
+5V
R230 33
USB1_OCD
SIDE_USB_DM
IC206
AP2191SG-13
3
IN_2
2
IN_1
4
EN
1
GND
5
FLG
6
OUT_1
7
OUT_2
8
NC
DSUB_VSYNC
HPD3
DSUB_HSYNC
+3.3V
RGB_DDC_SDA
D2+_HDMI2
JK203
1
2
3
4
5
6
7
8
9
10
PC_L_IN
D203
ENKMC2838-T112
A1
C
A2
C206
1000pF
50V
+3.3V
R298
470K
R224
1K
JK205
SPG09-DB-010
1
RED
2
GREEN
3
BLUE
4
GND_1
5
DDC_GND
6
RED_GND
7
GREEN_GND
8
BLUE_GND
9
NC
10
SYNC_GND
11
GND_2
12
DDC_DATA
13
H_SYNC
14
V_SYNC
15
DDC_CLOCK
16
SHILED
HPD2
R6003
10K
1/16W
5%
DDC_SDA_2
CK+_HDMI2
R297
0
D217
30V
READY
D2-_HDMI3
C211
10pF
50V
SIDEAV_DET
C238
1000pF
50V
JK204
1
GND
2
VCC
3
VINPUT
4
FIX_POLE
D0+_HDMI1
R219
10K
IC204
READY
3
GND
2
B
4
Y
1
A
5
VCC
S7_RXD
R263
33
C241
0.1uF
16V
DSUB_B+
R269
27K
READY
J
P
2
0
8
R238
75
JK208
PEJ027-04
6B
T_TERMINAL2
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
+3.3V
+3.3V
R229
3.3K
R225 1K
CEC_REMOTE_S7
C244
0.1uF
16V
Q202
2SC3875S(ALY)
E
B
C
R258
10K
+3.3V_ST
D1-_HDMI1
+5V
C242
0.1uF
16V
R268
100
R252
3.3K
R254
33
R215
10K
R206 33
R273 0
READY
GP4 LM1
20110531
1
FLASH/EEPROM/GPIO
7
NAND
GATE
RGB PC
SIDE_HDMI
HDMI_1
RS232C
SPDIF
SIDE CVBS
Capacitors on VBUSA should be
placed as closd to connector as possible.
SIDE USB
For CEC
PC AUDIO
HDMI_2
10mm
$0.11
HDMI
T
H
E
R
M
A
L
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.
TC2P
TCLK2P
TCLK2N
C315
22pF
50V
READY
TCLK1P
C325
68uF
35V
TB2N
C339
1000pF
50V
C337
0.22uF
50V
DISP_EN
TD2N
TA2N
TE2P
R392
4.7K
C333
0.22uF
50V
C326
330pF
50V
ZD301
5.1V
C314
0.1uF
50V
AUD_SCK
R387
22
KEY2
TD1P
TB1P
R397
10K
R355
2K
R396
10K
C340
1000pF
50V
C310
4700pF
50V
+3.3V
R323
2.2
C342
1000pF
50V
TC1P
PC_SER_CLK
C322 1uF
25V
AMP_RESET_N
TE2N
AC_DET
TC2N
R383
0
TE1N
R379
4.7K
TOUCH_VER_CHK
AUD_LRCK
TD2P
TA2P
P_SDA
C336
0.22uF
50V
C334
0.22uF
50V
TE1P
C335
0.22uF
50V
DISP_EN
TC2N
C313
22pF
50V
READY
TB1P
UART_RXD
TCLK2P
C321
0.1uF 50V
R393
4.7K
R390
22
IR
L303
10.0uH
R324
0
TB2P
TCLK1N
ZD306
5.1V
READY
C308
0.1uF
16V
AMP_DEMOD_SDA
P
3
0
0
S
M
A
W
2
5
0
-
H
0
4
R
1
2
3
4
TE1P
C316
0.1uF
50V
AUD_LRCH
SUB_SCL
TA1P
R1300
20
R386
22
R398
22
PC_SER_DATA
R391
22
R394
10K
Q306
2SC3052
E
B
C
AMP_MUTE
P_17V
TC1N
C327
330pF
50V
TCLK2N
ZD302
5.1V
P302
TF05-51S
HD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
R1302
10K
R321
2K
R353
10K
READY
P_SCL
R326
10K
READY
TB2P
R385
22
TC2P
R399
22
C319
0.1uF
50V
R388
22
C323
0.1uF 50V
R384
22
TA1N
P301
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
R389
22
TCLK1N
C309
22pF
50V
READY
C331
10pF
PC_SER_DATA
PC_SER_CLK
TD1N
KEY1
TB1N
Q305
2SC3875S(ALY)
READY
E
B
C
L302
10.0uH
TE2N
+3.3V_ST
TA2P
SUB_SDA
P_SCL
TA2N
TA1P
ZD305
5.1V
READY
TE1N
R381
10K
+3.3V_ST
R1301
20
TE2P
LED_RED
TD1N
L300
10.0uH
C338
0.22uF
50V
TD2P
AUD_MASTER_CLK
L301
10.0uH
ZD303
5.1V
READY
TB1N
UART_TXD
TA1N
C311
0.1uF
50V
TC1N
C318
0.1uF
50V
UART_TXD
C317
680pF
50V
UART_RXD
P_SDA
C330
0.1uF
16V
C312
22pF
50V
READY
C320 1uF
25V
TD2N
TC1P
+3.3V_ST
C341
1000pF
50V
IC300
STA368BWG
@compC
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
3
7
[EP]GND
TB2N
TD1P
TCLK1P
P303
104060-8017
FHD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
ZD304
5.1V
READY
AMP_DEMOD_SCL
R320
2K
R382
0
READY
C324
0.1uF
50V
GP4 LM1
20110531
2
Main/Power/GPIO
7
LVDS
Close-by
Close-by
Key/IR
Close-by
Close-by
Audio AMP
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